diff --git a/config/config_test.go b/config/config_test.go index 7738219d..38483667 100644 --- a/config/config_test.go +++ b/config/config_test.go @@ -1309,53 +1309,3 @@ endpoints: t.Error("services should've been merged in endpoints") } } - -// XXX: Remove this in v4.0.0 -func TestParseAndValidateConfigBytes_backwardCompatibleWithStorageFile(t *testing.T) { - file := t.TempDir() + "/test.db" - config, err := parseAndValidateConfigBytes([]byte(fmt.Sprintf(` -storage: - type: sqlite - file: %s - -endpoints: - - name: website - url: https://twin.sh/actuator/health - conditions: - - "[STATUS] == 200" -`, file))) - if err != nil { - t.Error("expected no error, got", err.Error()) - } - if config == nil { - t.Fatal("Config shouldn't have been nil") - } - if config.Storage == nil || config.Storage.Path != file || config.Storage.Type != storage.TypeSQLite { - t.Error("expected storage to be set to sqlite, got", config.Storage) - } -} - -// XXX: Remove this in v4.0.0 -func TestParseAndValidateConfigBytes_backwardCompatibleWithStorageTypeMemoryAndFile(t *testing.T) { - file := t.TempDir() + "/test.db" - config, err := parseAndValidateConfigBytes([]byte(fmt.Sprintf(` -storage: - type: memory - file: %s - -endpoints: - - name: website - url: https://twin.sh/actuator/health - conditions: - - "[STATUS] == 200" -`, file))) - if err != nil { - t.Error("expected no error, got", err.Error()) - } - if config == nil { - t.Fatal("Config shouldn't have been nil") - } - if config.Storage == nil || config.Storage.Path != file || config.Storage.Type != storage.TypeMemory { - t.Error("expected storage to be set to memory, got", config.Storage) - } -} diff --git a/controller/handler/endpoint_status.go b/controller/handler/endpoint_status.go index 06c9813e..4f487787 100644 --- a/controller/handler/endpoint_status.go +++ b/controller/handler/endpoint_status.go @@ -13,7 +13,7 @@ import ( "github.com/TwiN/gatus/v3/storage/store" "github.com/TwiN/gatus/v3/storage/store/common" "github.com/TwiN/gatus/v3/storage/store/common/paging" - "github.com/TwiN/gocache" + "github.com/TwiN/gocache/v2" "github.com/gorilla/mux" ) diff --git a/go.mod b/go.mod index ae14e8e0..3a93ff91 100644 --- a/go.mod +++ b/go.mod @@ -4,7 +4,6 @@ go 1.18 require ( github.com/TwiN/g8 v1.3.0 - github.com/TwiN/gocache v1.2.4 github.com/TwiN/gocache/v2 v2.0.0 github.com/TwiN/health v1.4.0 github.com/coreos/go-oidc/v3 v3.1.0 @@ -34,7 +33,6 @@ require ( github.com/prometheus/common v0.31.1 // indirect github.com/prometheus/procfs v0.7.3 // indirect github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect - go.etcd.io/bbolt v1.3.6 // indirect golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d // indirect golang.org/x/mod v0.5.1 // indirect golang.org/x/net v0.0.0-20211209124913-491a49abca63 // indirect diff --git a/go.sum b/go.sum index 968761ab..a2e43f28 100644 --- a/go.sum +++ b/go.sum @@ -35,8 +35,6 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo= github.com/TwiN/g8 v1.3.0 h1:mNv3R35GhDn1gEV0BKMl1oupZ1tDtOWPTHUKu+W/k3U= github.com/TwiN/g8 v1.3.0/go.mod h1:SiIdItS0agSUloFqdQQt/RObB2jGSq+nnE9WfFv3RIo= -github.com/TwiN/gocache v1.2.4 h1:AfJ1YRcxtQ/zZEN61URDwk/dwFG7LSRenU5qIm9dQzo= -github.com/TwiN/gocache v1.2.4/go.mod h1:BjabsQQy6z5uHDorHa4LJVPEzFeitLIDbCtdv3gc1gA= github.com/TwiN/gocache/v2 v2.0.0 h1:CPbDNKdSJpmBkh7aWcO7D3KK1yWaMlwX+3dsBPE8/so= github.com/TwiN/gocache/v2 v2.0.0/go.mod h1:j4MABVaia2Tp53ERWc/3l4YxkswtPjB2hQzmL/kD/VQ= github.com/TwiN/health v1.4.0 h1:Ts7lb4ihYDpVEbFSGAhSEZTSwuDOADnwJLFngFl4xzw= @@ -70,8 +68,6 @@ github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymF github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4= github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98= github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c= -github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo= -github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ= github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU= github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8= github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8= @@ -83,7 +79,6 @@ github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A= github.com/go-ping/ping v0.0.0-20210911151512-381826476871 h1:wtjTfjwAR/BYYMJ+QOLI/3J/qGEI0fgrkZvgsEWK2/Q= github.com/go-ping/ping v0.0.0-20210911151512-381826476871/go.mod h1:xIFjORFzTxqIV/tDVGO4eDy/bLuSyawEeojSm3GfRGk= -github.com/go-redis/redis v6.15.9+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA= github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY= github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ= github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g= @@ -149,7 +144,6 @@ github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI= github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So= github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8= github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8= -github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU= github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc= github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4= github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU= @@ -187,13 +181,6 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lN github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0= github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U= github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U= -github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A= -github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE= -github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk= -github.com/onsi/ginkgo v1.14.1/go.mod h1:iSB4RoI2tjJc9BBv4NKIKWKya62Rps+oPG/Lv9klQyY= -github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY= -github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo= -github.com/onsi/gomega v1.10.2/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo= github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= @@ -233,16 +220,12 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4= github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA= -github.com/tidwall/redcon v1.3.2/go.mod h1:bdYBm4rlcWpst2XMwKVzWDF9CoUxEbUmM7CQrKeOZas= github.com/wcharczuk/go-chart/v2 v2.1.0 h1:tY2slqVQ6bN+yHSnDYwZebLQFkphK4WNrVwnt7CJZ2I= github.com/wcharczuk/go-chart/v2 v2.1.0/go.mod h1:yx7MvAVNcP/kN9lKXM/NTce4au4DFN99j6i1OwDclNA= github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= -go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ= -go.etcd.io/bbolt v1.3.6 h1:/ecaJf0sk1l4l6V4awd65v2C3ILy7MSj+s/x1ADCIMU= -go.etcd.io/bbolt v1.3.6/go.mod h1:qXsaaIqmgQH0T+OPdb99Bf+PKfBBQVAdyD6TY9G8XM4= go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU= go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8= go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw= @@ -292,7 +275,6 @@ golang.org/x/mod v0.5.1 h1:OJxoQ/rynoF0dcCdI7cLPktw/hR2cueqYfjm43oqK38= golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro= golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= -golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= @@ -316,7 +298,6 @@ golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/ golang.org/x/net v0.0.0-20200505041828-1ed23360d12c/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= -golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA= golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA= @@ -348,7 +329,6 @@ golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cO golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= -golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= @@ -359,10 +339,7 @@ golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7w golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= @@ -378,12 +355,10 @@ golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7w golang.org/x/sys v0.0.0-20200501052902-10377860bb8e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200511232937-7e40ca221e25/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20200923182605-d9f96fdee20d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20201126233918-771906719818/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= @@ -540,12 +515,10 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= -gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys= gopkg.in/mail.v2 v2.3.1 h1:WYFn/oANrAGP2C0dcV6/pbkPzv8yGzqTjPmTeO7qoXk= gopkg.in/mail.v2 v2.3.1/go.mod h1:htwXN1Qh09vZJ1NVKxQqHPBaCBbzKhp5GzuJEA4VJWw= gopkg.in/square/go-jose.v2 v2.5.1 h1:7odma5RETjNHWJnR32wx8t+Io4djHE1PqxCFx3iiZ2w= gopkg.in/square/go-jose.v2 v2.5.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI= -gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw= gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= diff --git a/storage/config.go b/storage/config.go index 83ec4b81..2977308f 100644 --- a/storage/config.go +++ b/storage/config.go @@ -2,13 +2,11 @@ package storage import ( "errors" - "log" ) var ( ErrSQLStorageRequiresPath = errors.New("sql storage requires a non-empty path to be defined") ErrMemoryStorageDoesNotSupportPath = errors.New("memory storage does not support persistence, use sqlite if you want persistence on file") - ErrCannotSetBothFileAndPath = errors.New("file has been deprecated in favor of path: you cannot set both of them") ) // Config is the configuration for storage @@ -18,12 +16,6 @@ type Config struct { // Note that not all Type support persistence Path string `yaml:"path"` - // File is the path of the file to use for persistence - // If blank, persistence is disabled - // - // Deprecated - File string `yaml:"file"` - // Type of store // If blank, uses the default in-memory store Type Type `yaml:"type"` @@ -31,14 +23,6 @@ type Config struct { // ValidateAndSetDefaults validates the configuration and sets the default values (if applicable) func (c *Config) ValidateAndSetDefaults() error { - if len(c.File) > 0 && len(c.Path) > 0 { // XXX: Remove for v4.0.0 - return ErrCannotSetBothFileAndPath - } else if len(c.File) > 0 { // XXX: Remove for v4.0.0 - log.Println("WARNING: Your configuration is using 'storage.file', which is deprecated in favor of 'storage.path'") - log.Println("WARNING: storage.file will be completely removed in v4.0.0, so please update your configuration") - log.Println("WARNING: See https://github.com/TwiN/gatus/issues/197") - c.Path = c.File - } if c.Type == "" { c.Type = TypeMemory } @@ -46,12 +30,7 @@ func (c *Config) ValidateAndSetDefaults() error { return ErrSQLStorageRequiresPath } if c.Type == TypeMemory && len(c.Path) > 0 { - log.Println("WARNING: Your configuration is using a storage of type memory with persistence, which has been deprecated") - log.Println("WARNING: As of v4.0.0, the default storage type (memory) will not support persistence.") - log.Println("WARNING: If you want persistence, use 'storage.type: sqlite' instead of 'storage.type: memory'") - log.Println("WARNING: See https://github.com/TwiN/gatus/issues/198") - // XXX: Uncomment the following line for v4.0.0 - //return ErrMemoryStorageDoesNotSupportPath + return ErrMemoryStorageDoesNotSupportPath } return nil } diff --git a/storage/store/memory/memory.go b/storage/store/memory/memory.go index 68e3aff8..91519665 100644 --- a/storage/store/memory/memory.go +++ b/storage/store/memory/memory.go @@ -2,11 +2,7 @@ package memory import ( "encoding/gob" - "io/fs" - "log" - "os" "sort" - "strings" "sync" "time" @@ -14,7 +10,7 @@ import ( "github.com/TwiN/gatus/v3/storage/store/common" "github.com/TwiN/gatus/v3/storage/store/common/paging" "github.com/TwiN/gatus/v3/util" - "github.com/TwiN/gocache" + "github.com/TwiN/gocache/v2" ) func init() { @@ -28,11 +24,7 @@ func init() { // Store that leverages gocache type Store struct { sync.RWMutex - // Deprecated - // - // File persistence will no longer be supported as of v4.0.0 - // XXX: Remove me in v4.0.0 - file string + cache *gocache.Cache } @@ -42,30 +34,8 @@ type Store struct { // supports eventual persistence. func NewStore(file string) (*Store, error) { store := &Store{ - file: file, cache: gocache.NewCache().WithMaxSize(gocache.NoMaxSize), } - // XXX: Remove the block below in v4.0.0 because persistence with the memory store will no longer be supported - // XXX: Make sure to also update gocache to v2.0.0 - if len(file) > 0 { - _, err := store.cache.ReadFromFile(file) - if err != nil { - // XXX: Remove the block below in v4.0.0 - if data, err2 := os.ReadFile(file); err2 == nil { - isFromOldVersion := strings.Contains(string(data), "*core.ServiceStatus") - if isFromOldVersion { - log.Println("WARNING: Couldn't read file due to recent change in v3.3.0, see https://github.com/TwiN/gatus/issues/191") - log.Println("WARNING: Will automatically rename old file to " + file + ".old and overwrite the current file") - if err = os.WriteFile(file+".old", data, fs.ModePerm); err != nil { - log.Println("WARNING: Tried my best to keep the old file, but it wasn't enough. Sorry, your file will be overwritten :(") - } - // Return the store regardless of whether there was an error or not - return store, nil - } - } - return nil, err - } - } return store, nil } @@ -221,9 +191,6 @@ func (s *Store) Clear() { // Save persists the cache to the store file func (s *Store) Save() error { - if len(s.file) > 0 { - return s.cache.SaveToFile(s.file) - } return nil } diff --git a/vendor/github.com/TwiN/gocache/.gitattributes b/vendor/github.com/TwiN/gocache/.gitattributes deleted file mode 100644 index fbd75d33..00000000 --- a/vendor/github.com/TwiN/gocache/.gitattributes +++ /dev/null @@ -1 +0,0 @@ -* text=lf \ No newline at end of file diff --git a/vendor/github.com/TwiN/gocache/.gitignore b/vendor/github.com/TwiN/gocache/.gitignore deleted file mode 100644 index 485dee64..00000000 --- a/vendor/github.com/TwiN/gocache/.gitignore +++ /dev/null @@ -1 +0,0 @@ -.idea diff --git a/vendor/github.com/TwiN/gocache/Dockerfile b/vendor/github.com/TwiN/gocache/Dockerfile deleted file mode 100644 index 591ed330..00000000 --- a/vendor/github.com/TwiN/gocache/Dockerfile +++ /dev/null @@ -1,20 +0,0 @@ -# Build the go application into a binary -FROM golang:alpine as builder -WORKDIR /app -ADD . ./ -RUN CGO_ENABLED=0 GOOS=linux go build -mod vendor -a -installsuffix cgo -o bin/gocache-server cmd/server/main.go -RUN apk --update add --no-cache ca-certificates - -FROM scratch -ENV APP_HOME=/app -ENV APP_DATA=/app/data -ENV PORT=6379 -ENV MAX_CACHE_SIZE=100000 -ENV MAX_MEMORY_USAGE=0 -ENV AUTOSAVE="false" -VOLUME ${APP_DATA} -WORKDIR ${APP_HOME} -COPY --from=builder /app/bin/gocache-server ./bin/gocache-server -COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt -EXPOSE ${PORT} -ENTRYPOINT ["/app/bin/gocache-server"] \ No newline at end of file diff --git a/vendor/github.com/TwiN/gocache/LICENSE.md b/vendor/github.com/TwiN/gocache/LICENSE.md deleted file mode 100644 index ca64af38..00000000 --- a/vendor/github.com/TwiN/gocache/LICENSE.md +++ /dev/null @@ -1,9 +0,0 @@ -MIT License - -Copyright (c) 2021 TwiN - -Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/vendor/github.com/TwiN/gocache/Makefile b/vendor/github.com/TwiN/gocache/Makefile deleted file mode 100644 index 84f78c61..00000000 --- a/vendor/github.com/TwiN/gocache/Makefile +++ /dev/null @@ -1,24 +0,0 @@ -db: docker-build -dr: docker-run -drmem: docker-run-max-memory-usage - -docker-build: - docker build --tag=gocache-server . - -docker-run: - docker run -p 6666:6379 -e AUTOSAVE=true -e MAX_CACHE_SIZE=0 --name gocache-server -d gocache-server - -docker-run-max-memory-usage: - docker run -p 6666:6379 -e AUTOSAVE=true -e MAX_CACHE_SIZE=0 -e MAX_MEMORY_USAGE=524288000 --name gocache-server -d gocache-server - -run: - PORT=6666 go run cmd/server/main.go - -start-redis: - docker run -p 6379:6379 --name redis -d redis - -redis-benchmark: - redis-benchmark -p 6666 -t set,get -n 10000000 -r 200000 -q -P 512 -c 512 - -memtier-benchmark: - memtier_benchmark --port 6666 --hide-histogram --key-maximum 100000 --ratio 1:1 --expiry-range 1-100 --key-pattern R:R --randomize -n 100000 \ No newline at end of file diff --git a/vendor/github.com/TwiN/gocache/README.md b/vendor/github.com/TwiN/gocache/README.md deleted file mode 100644 index 9c40a563..00000000 --- a/vendor/github.com/TwiN/gocache/README.md +++ /dev/null @@ -1,580 +0,0 @@ -# gocache - -![build](https://github.com/TwiN/gocache/workflows/build/badge.svg?branch=master) -[![Go Report Card](https://goreportcard.com/badge/github.com/TwiN/gocache)](https://goreportcard.com/report/github.com/TwiN/gocache) -[![codecov](https://codecov.io/gh/TwiN/gocache/branch/master/graph/badge.svg)](https://codecov.io/gh/TwiN/gocache) -[![Go version](https://img.shields.io/github/go-mod/go-version/TwiN/gocache.svg)](https://github.com/TwiN/gocache) -[![Go Reference](https://pkg.go.dev/badge/github.com/TwiN/gocache.svg)](https://pkg.go.dev/github.com/TwiN/gocache) -[![Follow TwiN](https://img.shields.io/github/followers/TwiN?label=Follow&style=social)](https://github.com/TwiN) - -gocache is an easy-to-use, high-performance, lightweight and thread-safe (goroutine-safe) in-memory key-value cache -with support for LRU and FIFO eviction policies as well as expiration, bulk operations and even persistence to file. - - -## Table of Contents - -- [Features](#features) -- [Usage](#usage) - - [Initializing the cache](#initializing-the-cache) - - [Functions](#functions) - - [Examples](#examples) - - [Creating or updating an entry](#creating-or-updating-an-entry) - - [Getting an entry](#getting-an-entry) - - [Deleting an entry](#deleting-an-entry) - - [Complex example](#complex-example) -- [Persistence](#persistence) - - [Limitations](#limitations) -- [Eviction](#eviction) - - [MaxSize](#maxsize) - - [MaxMemoryUsage](#maxmemoryusage) -- [Expiration](#expiration) -- [Server](#server) -- [Running the server with Docker](#running-the-server-with-docker) -- [Performance](#performance) - - [Summary](#summary) - - [Results](#results) -- [FAQ](#faq) - - [How can I persist the data on application termination?](#how-can-i-persist-the-data-on-application-termination) - - [How can I automatically save the cache to a file every 5 minutes?](#how-can-i-automatically-save-the-cache-to-a-file-every-5-minutes) - - [Why does the memory usage not go down?](#why-does-the-memory-usage-not-go-down) - - -## Features -gocache supports the following cache eviction policies: -- First in first out (FIFO) -- Least recently used (LRU) - -It also supports cache entry TTL, which is both active and passive. Active expiration means that if you attempt -to retrieve a cache key that has already expired, it will delete it on the spot and the behavior will be as if -the cache key didn't exist. As for passive expiration, there's a background task that will take care of deleting -expired keys. - -It also includes what you'd expect from a cache, like bulk operations, persistence and patterns. - -While meant to be used as a library, there's a Redis-compatible cache server included. -See the [Server](#server) section. -It may also serve as a good reference to use in order to implement gocache in your own applications. - - -## Usage -``` -go get -u github.com/TwiN/gocache -``` - -If you're interested in using gocache as a server rather than an embedded library, see [Server](#server) - - -### Initializing the cache -```go -cache := gocache.NewCache().WithMaxSize(1000).WithEvictionPolicy(gocache.LeastRecentlyUsed) -``` - -If you're planning on using expiration (`SetWithTTL` or `Expire`) and you want expired entries to be automatically deleted -in the background, make sure to start the janitor when you instantiate the cache: - -```go -cache.StartJanitor() -``` - -### Functions -| Function | Description | -| --------------------------------- | ----------- | -| WithMaxSize | Sets the max size of the cache. `gocache.NoMaxSize` means there is no limit. If not set, the default max size is `gocache.DefaultMaxSize`. -| WithMaxMemoryUsage | Sets the max memory usage of the cache. `gocache.NoMaxMemoryUsage` means there is no limit. The default behavior is to not evict based on memory usage. -| WithEvictionPolicy | Sets the eviction algorithm to be used when the cache reaches the max size. If not set, the default eviction policy is `gocache.FirstInFirstOut` (FIFO). -| WithForceNilInterfaceOnNilPointer | Configures whether values with a nil pointer passed to write functions should be forcefully set to nil. Defaults to true. -| StartJanitor | Starts the janitor, which is in charge of deleting expired cache entries in the background. -| StopJanitor | Stops the janitor. -| Set | Same as `SetWithTTL`, but with no expiration (`gocache.NoExpiration`) -| SetAll | Same as `Set`, but in bulk -| SetWithTTL | Creates or updates a cache entry with the given key, value and expiration time. If the max size after the aforementioned operation is above the configured max size, the tail will be evicted. Depending on the eviction policy, the tail is defined as the oldest -| Get | Gets a cache entry by its key. -| GetByKeys | Gets a map of entries by their keys. The resulting map will contain all keys, even if some of the keys in the slice passed as parameter were not present in the cache. -| GetAll | Gets all cache entries. -| GetKeysByPattern | Retrieves a slice of keys that matches a given pattern. -| Delete | Removes a key from the cache. -| DeleteAll | Removes multiple keys from the cache. -| Count | Gets the size of the cache. This includes cache keys which may have already expired, but have not been removed yet. -| Clear | Wipes the cache. -| TTL | Gets the time until a cache key expires. -| Expire | Sets the expiration time of an existing cache key. -| SaveToFile | Stores the content of the cache to a file so that it can be read using `ReadFromFile`. See [persistence](#persistence). -| ReadFromFile | Populates the cache using a file created using `SaveToFile`. See [persistence](#persistence). - -For further documentation, please refer to [Go Reference](https://pkg.go.dev/github.com/TwiN/gocache) - - -### Examples - -#### Creating or updating an entry -```go -cache.Set("key", "value") -cache.Set("key", 1) -cache.Set("key", struct{ Text string }{Test: "value"}) -cache.SetWithTTL("key", []byte("value"), 24*time.Hour) -``` - -#### Getting an entry -```go -value, exists := cache.Get("key") -``` -You can also get multiple entries by using `cache.GetByKeys([]string{"key1", "key2"})` - -#### Deleting an entry -```go -cache.Delete("key") -``` -You can also delete multiple entries by using `cache.DeleteAll([]string{"key1", "key2"})` - -#### Complex example -```go -package main - -import ( - "fmt" - "time" - - "github.com/TwiN/gocache" -) - -func main() { - cache := gocache.NewCache().WithEvictionPolicy(gocache.LeastRecentlyUsed).WithMaxSize(10000) - cache.StartJanitor() // Passively manages expired entries - - cache.Set("key", "value") - cache.SetWithTTL("key-with-ttl", "value", 60*time.Minute) - cache.SetAll(map[string]interface{}{"k1": "v1", "k2": "v2", "k3": "v3"}) - - value, exists := cache.Get("key") - fmt.Printf("[Get] key=key; value=%s; exists=%v\n", value, exists) - for key, value := range cache.GetByKeys([]string{"k1", "k2", "k3"}) { - fmt.Printf("[GetByKeys] key=%s; value=%s\n", key, value) - } - for _, key := range cache.GetKeysByPattern("key*", 0) { - fmt.Printf("[GetKeysByPattern] key=%s\n", key) - } - - fmt.Println("Cache size before persisting cache to file:", cache.Count()) - err := cache.SaveToFile("cache.bak") - if err != nil { - panic(fmt.Sprintf("failed to persist cache to file: %s", err.Error())) - } - - cache.Expire("key", time.Hour) - time.Sleep(500*time.Millisecond) - timeUntilExpiration, _ := cache.TTL("key") - fmt.Println("Number of minutes before 'key' expires:", int(timeUntilExpiration.Seconds())) - - cache.Delete("key") - cache.DeleteAll([]string{"k1", "k2", "k3"}) - - fmt.Println("Cache size before restoring cache from file:", cache.Count()) - _, err = cache.ReadFromFile("cache.bak") - if err != nil { - panic(fmt.Sprintf("failed to restore cache from file: %s", err.Error())) - } - - fmt.Println("Cache size after restoring cache from file:", cache.Count()) - cache.Clear() - fmt.Println("Cache size after clearing the cache:", cache.Count()) -} -``` - -
- Output - -``` -[Get] key=key; value=value; exists=true -[GetByKeys] key=k2; value=v2 -[GetByKeys] key=k3; value=v3 -[GetByKeys] key=k1; value=v1 -[GetKeysByPattern] key=key -[GetKeysByPattern] key=key-with-ttl -Cache size before persisting cache to file: 5 -Number of minutes before 'key' expires: 3599 -Cache size before restoring cache from file: 1 -Cache size after restoring cache from file: 5 -Cache size after clearing the cache: 0 -``` -
- - -## Persistence -While gocache is an in-memory cache, you can still save the content of the cache in a file -and vice versa. - -To save the content of the cache to a file: -```go -err := cache.SaveToFile(TestCacheFile) -``` - -To retrieve the content of the cache from a file: -```go -numberOfEntriesEvicted, err := newCache.ReadFromFile(TestCacheFile) -``` -The `numberOfEntriesEvicted` will be non-zero only if the number of entries -in the file is higher than the cache's configured `MaxSize`. - -### Limitations -While you can cache structs in memory out of the box, persisting structs to a file requires you to -**register the custom interfaces that your application uses with the `gob` package**. - -```go -type YourCustomStruct struct { - A string - B int -} - -// ... -cache.Set("key", YourCustomStruct{A: "test", B: 123}) -``` -To persist your custom struct properly: -```go -gob.Register(YourCustomStruct{}) -cache.SaveToFile("gocache.bak") -``` -The same applies for restoring the cache from a file: -```go -cache := NewCache() -gob.Register(YourCustomStruct{}) -cache.ReadFromFile(TestCacheFile) -value, _ := cache.Get("key") -fmt.Println(value.(YourCustomStruct)) -``` -You only need to persist the struct once, so adding the following function in a file would suffice: -```go -func init() { - gob.Register(YourCustomStruct{}) -} -``` - -Failure to register your custom structs will prevent gocache from persisting and/or parsing the value of each keys that -use said custom structs. - -That being said, assuming that you're using gocache as a cache, this shouldn't create any bugs on your end, because -every key that cannot be parsed are not populated into the cache by `ReadFromFile`. - -In other words, if you're falling back to a database or something similar when the cache doesn't have the key requested, -you'll be fine. - -Note that if you need to modify the type of a variable in a struct, you should change the name of that variable as well. -For instance, if the struct has a `CreatedAt` variable with the type `time.Time` and that variable type is later -modified to `uint64`, decoding the struct would fail, however, if you rename the variable to `CreatedAtUnixTimeInMs`, -there won't be any decoding issues other than the loss of data for that field. You could also obviously handle the -migration gracefully by keeping both variables, populating the `CreatedAtUnixTimeInMs` variable with the `CreatedAt` -value and then removing the `CreatedAt` field. - - -## Eviction - -### MaxSize -Eviction by MaxSize is the default behavior, and is also the most efficient. - -The code below will create a cache that has a maximum size of 1000: -```go -cache := gocache.NewCache().WithMaxSize(1000) -``` -This means that whenever an operation causes the total size of the cache to go above 1000, the tail will be evicted. - -### MaxMemoryUsage -Eviction by MaxMemoryUsage is **disabled by default**, and is in alpha. - -The code below will create a cache that has a maximum memory usage of 50MB: -```go -cache := gocache.NewCache().WithMaxSize(0).WithMaxMemoryUsage(50*gocache.Megabyte) -``` -This means that whenever an operation causes the total memory usage of the cache to go above 50MB, one or more tails -will be evicted. - -Unlike evictions caused by reaching the MaxSize, evictions triggered by MaxMemoryUsage may lead to multiple entries -being evicted in a row. The reason for this is that if, for instance, you had 100 entries of 0.1MB each and you suddenly added -a single entry of 10MB, 100 entries would need to be evicted to make enough space for that new big entry. - -It's very important to keep in mind that eviction by MaxMemoryUsage is approximate. - -**The only memory taken into consideration is the size of the cache, not the size of the entire application.** -If you pass along 100MB worth of data in a matter of seconds, even though the cache's memory usage will remain -under 50MB (or whatever you configure the MaxMemoryUsage to), the memory footprint generated by that 100MB will -still exist until the next GC cycle. - -As previously mentioned, this is a work in progress, and here's a list of the things you should keep in mind: -- The memory usage of structs are a gross estimation and may not reflect the actual memory usage. -- Native types (string, int, bool, []byte, etc.) are the most accurate for calculating the memory usage. -- Adding an entry bigger than the configured MaxMemoryUsage will work, but it will evict all other entries. - - -## Expiration -There are two ways that the deletion of expired keys can take place: -- Active -- Passive - -**Active deletion of expired keys** happens when an attempt is made to access the value of a cache entry that expired. -`Get`, `GetByKeys` and `GetAll` are the only functions that can trigger active deletion of expired keys. - -**Passive deletion of expired keys** runs in the background and is managed by the janitor. -If you do not start the janitor, there will be no passive deletion of expired keys. - - -## Server -For the sake of convenience, a ready-to-go cache server is available through the `server` package. - -#### As an application -```go -package main - -import ( - "github.com/TwiN/gocache" - gocacheserver "github.com/TwiN/gocache/server" -) - -func main() { - cache := gocache.NewCache().WithEvictionPolicy(gocache.LeastRecentlyUsed).WithMaxSize(100000) - server := gocacheserver.NewServer(cache).WithPort(6379) - // This is a blocking function, therefore, you are expected to run this on a goroutine - server.Start() -} -``` - -The reason why the server is in a different package is because `gocache` limit its external dependencies to the strict -minimum (e.g. boltdb for persistence), however, rather than re-inventing the wheel, the server implementation uses -redcon, which is a very good Redis server framework for Go. - -That way, those who desire to use gocache without the server will not add any extra dependencies -as long as they don't import the `server` package. - -If you'd like to run it through the CLI: -``` -go run cmd/server/main.go -``` - -Any Redis client should be able to interact with the server, though only the following instructions are supported: -- [X] GET -- [X] SET -- [X] DEL -- [X] PING -- [X] QUIT -- [X] INFO -- [X] EXPIRE -- [X] SETEX -- [X] TTL -- [X] FLUSHDB -- [X] EXISTS -- [X] ECHO -- [X] MGET -- [X] MSET -- [X] SCAN (kind of - cursor is not currently supported) -- [ ] KEYS - - -## Running the server with Docker -[![Docker pulls](https://img.shields.io/docker/pulls/twinproduction/gocache-server.svg)](https://cloud.docker.com/repository/docker/twinproduction/gocache-server) - -``` -docker run --name gocache-server -p 6379:6379 twinproduction/gocache-server -``` - -To build it locally, refer to the Makefile's `docker-build` and `docker-run` steps. - - -## Performance - -### Summary -- **Set**: Both map and gocache have the same performance. -- **Get**: Map is faster than gocache. - -This is because gocache keeps track of the head and the tail for eviction and expiration/TTL. - -Ultimately, the difference is negligible. - -We could add a way to disable eviction or disable expiration altogether just to match the map's performance, -but if you're looking into using a library like gocache, odds are, you want more than just a map. - - -### Results -| key | value | -|:------ |:-------- | -| goos | windows | -| goarch | amd64 | -| cpu | i7-9700K | -| mem | 32G DDR4 | - -``` -// Normal map -BenchmarkMap_Get -BenchmarkMap_Get-8 46087372 26.7 ns/op -BenchmarkMap_Set -BenchmarkMap_Set/small_value-8 3841911 389 ns/op -BenchmarkMap_Set/medium_value-8 3887074 391 ns/op -BenchmarkMap_Set/large_value-8 3921956 393 ns/op -// Gocache -BenchmarkCache_Get -BenchmarkCache_Get/FirstInFirstOut-8 27273036 46.4 ns/op -BenchmarkCache_Get/LeastRecentlyUsed-8 26648248 46.3 ns/op -BenchmarkCache_Set -BenchmarkCache_Set/FirstInFirstOut_small_value-8 2919584 405 ns/op -BenchmarkCache_Set/FirstInFirstOut_medium_value-8 2990841 391 ns/op -BenchmarkCache_Set/FirstInFirstOut_large_value-8 2970513 391 ns/op -BenchmarkCache_Set/LeastRecentlyUsed_small_value-8 2962939 402 ns/op -BenchmarkCache_Set/LeastRecentlyUsed_medium_value-8 2962963 390 ns/op -BenchmarkCache_Set/LeastRecentlyUsed_large_value-8 2962928 394 ns/op -BenchmarkCache_SetUsingMaxMemoryUsage -BenchmarkCache_SetUsingMaxMemoryUsage/small_value-8 2683356 447 ns/op -BenchmarkCache_SetUsingMaxMemoryUsage/medium_value-8 2637578 441 ns/op -BenchmarkCache_SetUsingMaxMemoryUsage/large_value-8 2672434 443 ns/op -BenchmarkCache_SetWithMaxSize -BenchmarkCache_SetWithMaxSize/100_small_value-8 4782966 252 ns/op -BenchmarkCache_SetWithMaxSize/10000_small_value-8 4067967 296 ns/op -BenchmarkCache_SetWithMaxSize/100000_small_value-8 3762055 328 ns/op -BenchmarkCache_SetWithMaxSize/100_medium_value-8 4760479 252 ns/op -BenchmarkCache_SetWithMaxSize/10000_medium_value-8 4081050 295 ns/op -BenchmarkCache_SetWithMaxSize/100000_medium_value-8 3785050 330 ns/op -BenchmarkCache_SetWithMaxSize/100_large_value-8 4732909 254 ns/op -BenchmarkCache_SetWithMaxSize/10000_large_value-8 4079533 297 ns/op -BenchmarkCache_SetWithMaxSize/100000_large_value-8 3712820 331 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU -BenchmarkCache_SetWithMaxSizeAndLRU/100_small_value-8 4761732 254 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU/10000_small_value-8 4084474 296 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU/100000_small_value-8 3761402 329 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU/100_medium_value-8 4783075 254 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU/10000_medium_value-8 4103980 296 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU/100000_medium_value-8 3646023 331 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU/100_large_value-8 4779025 254 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU/10000_large_value-8 4096192 296 ns/op -BenchmarkCache_SetWithMaxSizeAndLRU/100000_large_value-8 3726823 331 ns/op -BenchmarkCache_GetSetMultipleConcurrent -BenchmarkCache_GetSetMultipleConcurrent-8 707142 1698 ns/op -BenchmarkCache_GetSetConcurrentWithFrequentEviction -BenchmarkCache_GetSetConcurrentWithFrequentEviction/FirstInFirstOut-8 3616256 334 ns/op -BenchmarkCache_GetSetConcurrentWithFrequentEviction/LeastRecentlyUsed-8 3636367 331 ns/op -BenchmarkCache_GetConcurrentWithLRU -BenchmarkCache_GetConcurrentWithLRU/FirstInFirstOut-8 4405557 268 ns/op -BenchmarkCache_GetConcurrentWithLRU/LeastRecentlyUsed-8 4445475 269 ns/op -BenchmarkCache_WithForceNilInterfaceOnNilPointer -BenchmarkCache_WithForceNilInterfaceOnNilPointer/true_with_nil_struct_pointer-8 6184591 191 ns/op -BenchmarkCache_WithForceNilInterfaceOnNilPointer/true-8 6090482 191 ns/op -BenchmarkCache_WithForceNilInterfaceOnNilPointer/false_with_nil_struct_pointer-8 6184629 187 ns/op -BenchmarkCache_WithForceNilInterfaceOnNilPointer/false-8 6281781 186 ns/op -(Trimmed "BenchmarkCache_" for readability) -WithForceNilInterfaceOnNilPointerWithConcurrency -WithForceNilInterfaceOnNilPointerWithConcurrency/true_with_nil_struct_pointer-8 4379564 268 ns/op -WithForceNilInterfaceOnNilPointerWithConcurrency/true-8 4379558 265 ns/op -WithForceNilInterfaceOnNilPointerWithConcurrency/false_with_nil_struct_pointer-8 4444456 261 ns/op -WithForceNilInterfaceOnNilPointerWithConcurrency/false-8 4493896 262 ns/op -``` - - -## FAQ - -### How can I persist the data on application termination? - -Because this library doesn't persist immediately after every write operations, persistence is instead expected to be -done on a schedule, like for instance, every 10 minutes. - -While this prevents you from losing all of your data, you may still lose some data if the application stopped 9 minutes -after the previous "auto save". - -To increase your odds of not losing any data, you can use Go's `signal` package, more specifically its `Notify` function -which allows listening for termination signals like SIGTERM and SIGINT. Once a termination signal is caught, you can -add the necessary logic for a graceful shutdown. - -In the following example, the code that would usually be present in the `main` function is moved to a different function -named `Start` which is launched on a different goroutine so that listening for a termination signals is what blocks the -main goroutine instead: - -```go -package main - -import ( - "log" - "os" - "os/signal" - "syscall" - - "github.com/TwiN/gocache" -) - -const CacheFile = "gocache.data" - -var cache = gocache.NewCache() - -func main() { - // Load persisted data from file - cache.ReadFromFile(CacheFile) - // Start everything else on another goroutine to prevent blocking the main goroutine - go Start() - // Wait for termination signal - sig := make(chan os.Signal, 1) - done := make(chan bool, 1) - signal.Notify(sig, os.Interrupt, syscall.SIGTERM) - go func() { - <-sig - log.Println("Received termination signal, attempting to gracefully shut down") - err := cache.SaveToFile(CacheFile) - if err != nil { - log.Println("Failed to save storage provider:", err.Error()) - } - done <- true - }() - <-done - log.Println("Shutting down") -} -``` - -Note that this won't protect you from a SIGKILL, as this signal cannot be caught. - - -### How can I automatically save the cache to a file every 5 minutes? - -Beside using the suggestion above, automatically persisting the cache on an interval will protect your application from -sudden terminations triggered by signals that cannot be caught, such as the force kill signal received by an application -being OOMKilled. - -The simplest implementation could be something like this: -```go -const CacheFile = "gocache.data" - -func main() { - cache := gocache.NewCache() - cache.ReadFromFile(CacheFile) - go autoSave(10*time.Minute) - // ... -} - -func autoSave(interval time.Duration) { - for { - err := cache.SaveToFile(CacheFile) - if err != nil { - log.Println("Failed to persist cache to file:", err.Error()) - } - time.Sleep(interval) - } -} -``` - - -### Why does the memory usage not go down? - -> **NOTE**: As of Go 1.16, this no longer applies. See [golang/go#42330](https://github.com/golang/go/issues/42330) - -By default, Go uses `MADV_FREE` if the kernel supports it to release memory, which is significantly more efficient -than using `MADV_DONTNEED`. Unfortunately, this means that RSS doesn't go down unless the OS actually needs the -memory. - -Technically, the memory _is_ available to the kernel, even if it shows a high memory usage, but the OS will only -use that memory if it needs to. In the case that the OS does need the freed memory, the RSS will go down and you'll -notice the memory usage lowering. - -[reference](https://github.com/golang/go/issues/33376#issuecomment-666455792) - -You can reproduce this by following the steps below: -- Start the server -- Note the memory usage -- Create 500k keys -- Note the memory usage -- Flush the cache -- Note that the memory usage has not decreased, despite the cache being empty. - -**Substituting gocache for a normal map will yield the same result.** - -If the released memory still appearing as used is a problem for you, -you can set the environment variable `GODEBUG` to `madvdontneed=1`. diff --git a/vendor/github.com/TwiN/gocache/entry.go b/vendor/github.com/TwiN/gocache/entry.go deleted file mode 100644 index a80ac6ea..00000000 --- a/vendor/github.com/TwiN/gocache/entry.go +++ /dev/null @@ -1,108 +0,0 @@ -package gocache - -import ( - "fmt" - "time" - "unsafe" -) - -// Entry is a cache entry -type Entry struct { - // Key is the name of the cache entry - Key string - - // Value is the value of the cache entry - Value interface{} - - // RelevantTimestamp is the variable used to store either: - // - creation timestamp, if the Cache's EvictionPolicy is FirstInFirstOut - // - last access timestamp, if the Cache's EvictionPolicy is LeastRecentlyUsed - // - // Note that updating an existing entry will also update this value - RelevantTimestamp time.Time - - // Expiration is the unix time in nanoseconds at which the entry will expire (-1 means no expiration) - Expiration int64 - - next *Entry - previous *Entry -} - -// Accessed updates the Entry's RelevantTimestamp to now -func (entry *Entry) Accessed() { - entry.RelevantTimestamp = time.Now() -} - -// Expired returns whether the Entry has expired -func (entry Entry) Expired() bool { - if entry.Expiration > 0 { - if time.Now().UnixNano() > entry.Expiration { - return true - } - } - return false -} - -// SizeInBytes returns the size of an entry in bytes, approximately. -func (entry *Entry) SizeInBytes() int { - return toBytes(entry.Key) + toBytes(entry.Value) + 32 -} - -func toBytes(value interface{}) int { - switch value.(type) { - case string: - return int(unsafe.Sizeof(value)) + len(value.(string)) - case int8, uint8, bool: - return int(unsafe.Sizeof(value)) + 1 - case int16, uint16: - return int(unsafe.Sizeof(value)) + 2 - case int32, uint32, float32, complex64: - return int(unsafe.Sizeof(value)) + 4 - case int64, uint64, int, uint, float64, complex128: - return int(unsafe.Sizeof(value)) + 8 - case []interface{}: - size := 0 - for _, v := range value.([]interface{}) { - size += toBytes(v) - } - return int(unsafe.Sizeof(value)) + size - case []string: - size := 0 - for _, v := range value.([]string) { - size += toBytes(v) - } - return int(unsafe.Sizeof(value)) + size - case []int8: - return int(unsafe.Sizeof(value)) + len(value.([]int8)) - case []uint8: - return int(unsafe.Sizeof(value)) + len(value.([]uint8)) - case []bool: - return int(unsafe.Sizeof(value)) + len(value.([]bool)) - case []int16: - return int(unsafe.Sizeof(value)) + (len(value.([]int16)) * 2) - case []uint16: - return int(unsafe.Sizeof(value)) + (len(value.([]uint16)) * 2) - case []int32: - return int(unsafe.Sizeof(value)) + (len(value.([]int32)) * 4) - case []uint32: - return int(unsafe.Sizeof(value)) + (len(value.([]uint32)) * 4) - case []float32: - return int(unsafe.Sizeof(value)) + (len(value.([]float32)) * 4) - case []complex64: - return int(unsafe.Sizeof(value)) + (len(value.([]complex64)) * 4) - case []int64: - return int(unsafe.Sizeof(value)) + (len(value.([]int64)) * 8) - case []uint64: - return int(unsafe.Sizeof(value)) + (len(value.([]uint64)) * 8) - case []int: - return int(unsafe.Sizeof(value)) + (len(value.([]int)) * 8) - case []uint: - return int(unsafe.Sizeof(value)) + (len(value.([]uint)) * 8) - case []float64: - return int(unsafe.Sizeof(value)) + (len(value.([]float64)) * 8) - case []complex128: - return int(unsafe.Sizeof(value)) + (len(value.([]complex128)) * 8) - default: - return int(unsafe.Sizeof(value)) + len(fmt.Sprintf("%v", value)) - } -} diff --git a/vendor/github.com/TwiN/gocache/gocache.go b/vendor/github.com/TwiN/gocache/gocache.go deleted file mode 100644 index f33b3cb7..00000000 --- a/vendor/github.com/TwiN/gocache/gocache.go +++ /dev/null @@ -1,567 +0,0 @@ -package gocache - -import ( - "errors" - "reflect" - "sync" - "time" -) - -var ( - Debug = false -) - -const ( - // NoMaxSize means that the cache has no maximum number of entries in the cache - // Setting Cache.maxSize to this value also means there will be no eviction - NoMaxSize = 0 - - // NoMaxMemoryUsage means that the cache has no maximum number of entries in the cache - NoMaxMemoryUsage = 0 - - // DefaultMaxSize is the max size set if no max size is specified - DefaultMaxSize = 100000 - - // NoExpiration is the value that must be used as TTL to specify that the given key should never expire - NoExpiration = -1 - - Kilobyte = 1024 - Megabyte = 1024 * Kilobyte - Gigabyte = 1024 * Megabyte -) - -var ( - ErrKeyDoesNotExist = errors.New("key does not exist") // Returned when a cache key does not exist - ErrKeyHasNoExpiration = errors.New("key has no expiration") // Returned when a cache key has no expiration - ErrJanitorAlreadyRunning = errors.New("janitor is already running") // Returned when the janitor has already been started -) - -// Cache is the core struct of gocache which contains the data as well as all relevant configuration fields -type Cache struct { - // maxSize is the maximum amount of entries that can be in the cache at any given time - // By default, this is set to DefaultMaxSize - maxSize int - - // maxMemoryUsage is the maximum amount of memory that can be taken up by the cache at any time - // By default, this is set to NoMaxMemoryUsage, meaning that the default behavior is to not evict - // based on maximum memory usage - maxMemoryUsage int - - // evictionPolicy is the eviction policy - evictionPolicy EvictionPolicy - - // stats is the object that contains cache statistics/metrics - stats *Statistics - - // entries is the content of the cache - entries map[string]*Entry - - // mutex is the lock for making concurrent operations on the cache - mutex sync.RWMutex - - // head is the cache entry at the head of the cache - head *Entry - - // tail is the last cache node and also the next entry that will be evicted - tail *Entry - - // stopJanitor is the channel used to stop the janitor - stopJanitor chan bool - - // memoryUsage is the approximate memory usage of the cache (dataset only) in bytes - memoryUsage int - - // forceNilInterfaceOnNilPointer determines whether all Set-like functions should set a value as nil if the - // interface passed has a nil value but not a nil type. - // - // By default, interfaces are only nil when both their type and value is nil. - // This means that when you pass a pointer to a nil value, the type of the interface - // will still show as nil, which means that if you don't cast the interface after - // retrieving it, a nil check will return that the value is not false. - forceNilInterfaceOnNilPointer bool -} - -// MaxSize returns the maximum amount of keys that can be present in the cache before -// new entries trigger the eviction of the tail -func (cache *Cache) MaxSize() int { - return cache.maxSize -} - -// MaxMemoryUsage returns the configured maxMemoryUsage of the cache -func (cache *Cache) MaxMemoryUsage() int { - return cache.maxMemoryUsage -} - -// EvictionPolicy returns the EvictionPolicy of the Cache -func (cache *Cache) EvictionPolicy() EvictionPolicy { - return cache.evictionPolicy -} - -// Stats returns statistics from the cache -func (cache *Cache) Stats() Statistics { - cache.mutex.RLock() - stats := Statistics{ - EvictedKeys: cache.stats.EvictedKeys, - ExpiredKeys: cache.stats.ExpiredKeys, - Hits: cache.stats.Hits, - Misses: cache.stats.Misses, - } - cache.mutex.RUnlock() - return stats -} - -// MemoryUsage returns the current memory usage of the cache's dataset in bytes -// If MaxMemoryUsage is set to NoMaxMemoryUsage, this will return 0 -func (cache *Cache) MemoryUsage() int { - return cache.memoryUsage -} - -// WithMaxSize sets the maximum amount of entries that can be in the cache at any given time -// A maxSize of 0 or less means infinite -func (cache *Cache) WithMaxSize(maxSize int) *Cache { - if maxSize < 0 { - maxSize = NoMaxSize - } - if maxSize != NoMaxSize && cache.Count() == 0 { - cache.entries = make(map[string]*Entry, maxSize) - } - cache.maxSize = maxSize - return cache -} - -// WithMaxMemoryUsage sets the maximum amount of memory that can be used by the cache at any given time -// -// NOTE: This is approximate. -// -// Setting this to NoMaxMemoryUsage will disable eviction by memory usage -func (cache *Cache) WithMaxMemoryUsage(maxMemoryUsageInBytes int) *Cache { - if maxMemoryUsageInBytes < 0 { - maxMemoryUsageInBytes = NoMaxMemoryUsage - } - cache.maxMemoryUsage = maxMemoryUsageInBytes - return cache -} - -// WithEvictionPolicy sets eviction algorithm. -// Defaults to FirstInFirstOut (FIFO) -func (cache *Cache) WithEvictionPolicy(policy EvictionPolicy) *Cache { - cache.evictionPolicy = policy - return cache -} - -// WithForceNilInterfaceOnNilPointer sets whether all Set-like functions should set a value as nil if the -// interface passed has a nil value but not a nil type. -// -// In Go, an interface is only nil if both its type and value are nil, which means that a nil pointer -// (e.g. (*Struct)(nil)) will retain its attribution to the type, and the unmodified value returned from -// Cache.Get, for instance, would return false when compared with nil if this option is set to false. -// -// We can bypass this by detecting if the interface's value is nil and setting it to nil rather than -// a nil pointer, which will make the value returned from Cache.Get return true when compared with nil. -// This is exactly what passing true to WithForceNilInterfaceOnNilPointer does, and it's also the default behavior. -// -// Alternatively, you may pass false to WithForceNilInterfaceOnNilPointer, which will mean that you'll have -// to cast the value returned from Cache.Get to its original type to check for whether the pointer returned -// is nil or not. -// -// If set to true: -// cache := gocache.NewCache().WithForceNilInterfaceOnNilPointer(true) -// cache.Set("key", (*Struct)(nil)) -// value, _ := cache.Get("key") -// // the following returns true, because the interface{} was forcefully set to nil -// if value == nil {} -// // the following will panic, because the value has been casted to its type (which is nil) -// if value.(*Struct) == nil {} -// -// If set to false: -// cache := gocache.NewCache().WithForceNilInterfaceOnNilPointer(false) -// cache.Set("key", (*Struct)(nil)) -// value, _ := cache.Get("key") -// // the following returns false, because the interface{} returned has a non-nil type (*Struct) -// if value == nil {} -// // the following returns true, because the value has been casted to its type -// if value.(*Struct) == nil {} -// -// In other words, if set to true, you do not need to cast the value returned from the cache to -// to check if the value is nil. -// -// Defaults to true -func (cache *Cache) WithForceNilInterfaceOnNilPointer(forceNilInterfaceOnNilPointer bool) *Cache { - cache.forceNilInterfaceOnNilPointer = forceNilInterfaceOnNilPointer - return cache -} - -// NewCache creates a new Cache -// -// Should be used in conjunction with Cache.WithMaxSize, Cache.WithMaxMemoryUsage and/or Cache.WithEvictionPolicy -// gocache.NewCache().WithMaxSize(10000).WithEvictionPolicy(gocache.LeastRecentlyUsed) -// -func NewCache() *Cache { - return &Cache{ - maxSize: DefaultMaxSize, - evictionPolicy: FirstInFirstOut, - stats: &Statistics{}, - entries: make(map[string]*Entry), - mutex: sync.RWMutex{}, - stopJanitor: nil, - forceNilInterfaceOnNilPointer: true, - } -} - -// Set creates or updates a key with a given value -func (cache *Cache) Set(key string, value interface{}) { - cache.SetWithTTL(key, value, NoExpiration) -} - -// SetWithTTL creates or updates a key with a given value and sets an expiration time (-1 is NoExpiration) -// -// The TTL provided must be greater than 0, or NoExpiration (-1). If a negative value that isn't -1 (NoExpiration) is -// provided, the entry will not be created if the key doesn't exist -func (cache *Cache) SetWithTTL(key string, value interface{}, ttl time.Duration) { - // An interface is only nil if both its value and its type are nil, however, passing a nil pointer as an interface{} - // means that the interface itself is not nil, because the interface value is nil but not the type. - if cache.forceNilInterfaceOnNilPointer { - if value != nil && (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) { - value = nil - } - } - cache.mutex.Lock() - entry, ok := cache.get(key) - if !ok { - // A negative TTL that isn't -1 (NoExpiration) or 0 is an entry that will expire instantly, - // so might as well just not create it in the first place - if ttl != NoExpiration && ttl < 1 { - cache.mutex.Unlock() - return - } - // Cache entry doesn't exist, so we have to create a new one - entry = &Entry{ - Key: key, - Value: value, - RelevantTimestamp: time.Now(), - next: cache.head, - } - if cache.head == nil { - cache.tail = entry - } else { - cache.head.previous = entry - } - cache.head = entry - cache.entries[key] = entry - if cache.maxMemoryUsage != NoMaxMemoryUsage { - cache.memoryUsage += entry.SizeInBytes() - } - } else { - // A negative TTL that isn't -1 (NoExpiration) or 0 is an entry that will expire instantly, - // so might as well just delete it immediately instead of updating it - if ttl != NoExpiration && ttl < 1 { - cache.delete(key) - cache.mutex.Unlock() - return - } - if cache.maxMemoryUsage != NoMaxMemoryUsage { - // Subtract the old entry from the cache's memoryUsage - cache.memoryUsage -= entry.SizeInBytes() - } - // Update existing entry's value - entry.Value = value - entry.RelevantTimestamp = time.Now() - if cache.maxMemoryUsage != NoMaxMemoryUsage { - // Add the memory usage of the new entry to the cache's memoryUsage - cache.memoryUsage += entry.SizeInBytes() - } - // Because we just updated the entry, we need to move it back to HEAD - cache.moveExistingEntryToHead(entry) - } - if ttl != NoExpiration { - entry.Expiration = time.Now().Add(ttl).UnixNano() - } else { - entry.Expiration = NoExpiration - } - // If the cache doesn't have a maxSize/maxMemoryUsage, then there's no point - // checking if we need to evict an entry, so we'll just return now - if cache.maxSize == NoMaxSize && cache.maxMemoryUsage == NoMaxMemoryUsage { - cache.mutex.Unlock() - return - } - // If there's a maxSize and the cache has more entries than the maxSize, evict - if cache.maxSize != NoMaxSize && len(cache.entries) > cache.maxSize { - cache.evict() - } - // If there's a maxMemoryUsage and the memoryUsage is above the maxMemoryUsage, evict - if cache.maxMemoryUsage != NoMaxMemoryUsage && cache.memoryUsage > cache.maxMemoryUsage { - for cache.memoryUsage > cache.maxMemoryUsage && len(cache.entries) > 0 { - cache.evict() - } - } - cache.mutex.Unlock() -} - -// SetAll creates or updates multiple values -func (cache *Cache) SetAll(entries map[string]interface{}) { - for key, value := range entries { - cache.SetWithTTL(key, value, NoExpiration) - } -} - -// Get retrieves an entry using the key passed as parameter -// If there is no such entry, the value returned will be nil and the boolean will be false -// If there is an entry, the value returned will be the value cached and the boolean will be true -func (cache *Cache) Get(key string) (interface{}, bool) { - cache.mutex.Lock() - entry, ok := cache.get(key) - if !ok { - cache.mutex.Unlock() - cache.stats.Misses++ - return nil, false - } - if entry.Expired() { - cache.stats.ExpiredKeys++ - cache.delete(key) - cache.mutex.Unlock() - return nil, false - } - cache.stats.Hits++ - if cache.evictionPolicy == LeastRecentlyUsed { - entry.Accessed() - if cache.head == entry { - cache.mutex.Unlock() - return entry.Value, true - } - // Because the eviction policy is LRU, we need to move the entry back to HEAD - cache.moveExistingEntryToHead(entry) - } - cache.mutex.Unlock() - return entry.Value, true -} - -// GetValue retrieves an entry using the key passed as parameter -// Unlike Get, this function only returns the value -func (cache *Cache) GetValue(key string) interface{} { - value, _ := cache.Get(key) - return value -} - -// GetByKeys retrieves multiple entries using the keys passed as parameter -// All keys are returned in the map, regardless of whether they exist or not, however, entries that do not exist in the -// cache will return nil, meaning that there is no way of determining whether a key genuinely has the value nil, or -// whether it doesn't exist in the cache using only this function. -func (cache *Cache) GetByKeys(keys []string) map[string]interface{} { - entries := make(map[string]interface{}) - for _, key := range keys { - entries[key], _ = cache.Get(key) - } - return entries -} - -// GetAll retrieves all cache entries -// -// If the eviction policy is LeastRecentlyUsed, note that unlike Get and GetByKeys, this does not update the last access -// timestamp. The reason for this is that since all cache entries will be accessed, updating the last access timestamp -// would provide very little benefit while harming the ability to accurately determine the next key that will be evicted -// -// You should probably avoid using this if you have a lot of entries. -// -// GetKeysByPattern is a good alternative if you want to retrieve entries that you do not have the key for, as it only -// retrieves the keys and does not trigger active eviction and has a parameter for setting a limit to the number of keys -// you wish to retrieve. -func (cache *Cache) GetAll() map[string]interface{} { - entries := make(map[string]interface{}) - cache.mutex.Lock() - for key, entry := range cache.entries { - if entry.Expired() { - cache.delete(key) - continue - } - entries[key] = entry.Value - } - cache.stats.Hits += uint64(len(entries)) - cache.mutex.Unlock() - return entries -} - -// GetKeysByPattern retrieves a slice of keys that match a given pattern -// If the limit is set to 0, the entire cache will be searched for matching keys. -// If the limit is above 0, the search will stop once the specified number of matching keys have been found. -// -// e.g. -// cache.GetKeysByPattern("*some*", 0) will return all keys containing "some" in them -// cache.GetKeysByPattern("*some*", 5) will return 5 keys (or less) containing "some" in them -// -// Note that GetKeysByPattern does not trigger active evictions, nor does it count as accessing the entry, the latter -// only applying if the cache uses the LeastRecentlyUsed eviction policy. -// The reason for that behavior is that these two (active eviction and access) only applies when you access the value -// of the cache entry, and this function only returns the keys. -func (cache *Cache) GetKeysByPattern(pattern string, limit int) []string { - var matchingKeys []string - cache.mutex.Lock() - for key, value := range cache.entries { - if value.Expired() { - continue - } - if MatchPattern(pattern, key) { - matchingKeys = append(matchingKeys, key) - if limit > 0 && len(matchingKeys) >= limit { - break - } - } - } - cache.mutex.Unlock() - return matchingKeys -} - -// Delete removes a key from the cache -// -// Returns false if the key did not exist. -func (cache *Cache) Delete(key string) bool { - cache.mutex.Lock() - ok := cache.delete(key) - cache.mutex.Unlock() - return ok -} - -// DeleteAll deletes multiple entries based on the keys passed as parameter -// -// Returns the number of keys deleted -func (cache *Cache) DeleteAll(keys []string) int { - numberOfKeysDeleted := 0 - cache.mutex.Lock() - for _, key := range keys { - if cache.delete(key) { - numberOfKeysDeleted++ - } - } - cache.mutex.Unlock() - return numberOfKeysDeleted -} - -// Count returns the total amount of entries in the cache, regardless of whether they're expired or not -func (cache *Cache) Count() int { - cache.mutex.RLock() - count := len(cache.entries) - cache.mutex.RUnlock() - return count -} - -// Clear deletes all entries from the cache -func (cache *Cache) Clear() { - cache.mutex.Lock() - cache.entries = make(map[string]*Entry) - cache.memoryUsage = 0 - cache.head = nil - cache.tail = nil - cache.mutex.Unlock() -} - -// TTL returns the time until the cache entry specified by the key passed as parameter -// will be deleted. -func (cache *Cache) TTL(key string) (time.Duration, error) { - cache.mutex.RLock() - entry, ok := cache.get(key) - cache.mutex.RUnlock() - if !ok { - return 0, ErrKeyDoesNotExist - } - if entry.Expiration == NoExpiration { - return 0, ErrKeyHasNoExpiration - } - timeUntilExpiration := time.Until(time.Unix(0, entry.Expiration)) - if timeUntilExpiration < 0 { - // The key has already expired but hasn't been deleted yet. - // From the client's perspective, this means that the cache entry doesn't exist - return 0, ErrKeyDoesNotExist - } - return timeUntilExpiration, nil -} - -// Expire sets a key's expiration time -// -// A TTL of -1 means that the key will never expire -// A TTL of 0 means that the key will expire immediately -// If using LRU, note that this does not reset the position of the key -// -// Returns true if the cache key exists and has had its expiration time altered -func (cache *Cache) Expire(key string, ttl time.Duration) bool { - entry, ok := cache.get(key) - if !ok || entry.Expired() { - return false - } - if ttl != NoExpiration { - entry.Expiration = time.Now().Add(ttl).UnixNano() - } else { - entry.Expiration = NoExpiration - } - return true -} - -// get retrieves an entry using the key passed as parameter, but unlike Get, it doesn't update the access time or -// move the position of the entry to the head -func (cache *Cache) get(key string) (*Entry, bool) { - entry, ok := cache.entries[key] - return entry, ok -} - -func (cache *Cache) delete(key string) bool { - entry, ok := cache.entries[key] - if ok { - if cache.maxMemoryUsage != NoMaxMemoryUsage { - cache.memoryUsage -= entry.SizeInBytes() - } - cache.removeExistingEntryReferences(entry) - delete(cache.entries, key) - } - return ok -} - -// moveExistingEntryToHead replaces the current cache head for an existing entry -func (cache *Cache) moveExistingEntryToHead(entry *Entry) { - if !(entry == cache.head && entry == cache.tail) { - cache.removeExistingEntryReferences(entry) - } - if entry != cache.head { - entry.next = cache.head - entry.previous = nil - if cache.head != nil { - cache.head.previous = entry - } - cache.head = entry - } -} - -// removeExistingEntryReferences modifies the next and previous reference of an existing entry and re-links -// the next and previous entry accordingly, as well as the cache head or/and the cache tail if necessary. -// Note that it does not remove the entry from the cache, only the references. -func (cache *Cache) removeExistingEntryReferences(entry *Entry) { - if cache.tail == entry && cache.head == entry { - cache.tail = nil - cache.head = nil - } else if cache.tail == entry { - cache.tail = cache.tail.previous - } else if cache.head == entry { - cache.head = cache.head.next - } - if entry.previous != nil { - entry.previous.next = entry.next - } - if entry.next != nil { - entry.next.previous = entry.previous - } - entry.next = nil - entry.previous = nil -} - -// evict removes the tail from the cache -func (cache *Cache) evict() { - if cache.tail == nil || len(cache.entries) == 0 { - return - } - if cache.tail != nil { - oldTail := cache.tail - cache.removeExistingEntryReferences(oldTail) - delete(cache.entries, oldTail.Key) - if cache.maxMemoryUsage != NoMaxMemoryUsage { - cache.memoryUsage -= oldTail.SizeInBytes() - } - cache.stats.EvictedKeys++ - } -} diff --git a/vendor/github.com/TwiN/gocache/janitor.go b/vendor/github.com/TwiN/gocache/janitor.go deleted file mode 100644 index e65bd2cd..00000000 --- a/vendor/github.com/TwiN/gocache/janitor.go +++ /dev/null @@ -1,141 +0,0 @@ -package gocache - -import ( - "log" - "time" -) - -const ( - // JanitorShiftTarget is the target number of expired keys to find during passive clean up duty - // before pausing the passive expired keys eviction process - JanitorShiftTarget = 25 - - // JanitorMaxIterationsPerShift is the maximum number of nodes to traverse before pausing - JanitorMaxIterationsPerShift = 1000 - - // JanitorMinShiftBackOff is the minimum interval between each iteration of steps - // defined by JanitorMaxIterationsPerShift - JanitorMinShiftBackOff = time.Millisecond * 50 - - // JanitorMaxShiftBackOff is the maximum interval between each iteration of steps - // defined by JanitorMaxIterationsPerShift - JanitorMaxShiftBackOff = time.Millisecond * 500 -) - -// StartJanitor starts the janitor on a different goroutine -// The janitor's job is to delete expired keys in the background, in other words, it takes care of passive eviction. -// It can be stopped by calling Cache.StopJanitor. -// If you do not start the janitor, expired keys will only be deleted when they are accessed through Get, GetByKeys, or -// GetAll. -func (cache *Cache) StartJanitor() error { - if cache.stopJanitor != nil { - return ErrJanitorAlreadyRunning - } - cache.stopJanitor = make(chan bool) - go func() { - // rather than starting from the tail on every run, we can try to start from the last traversed entry - var lastTraversedNode *Entry - totalNumberOfExpiredKeysInPreviousRunFromTailToHead := 0 - backOff := JanitorMinShiftBackOff - for { - select { - case <-time.After(backOff): - // Passive clean up duty - cache.mutex.Lock() - if cache.tail != nil { - start := time.Now() - steps := 0 - expiredEntriesFound := 0 - current := cache.tail - if lastTraversedNode != nil { - // Make sure the lastTraversedNode is still in the cache, otherwise we might be traversing nodes that were already deleted. - // Furthermore, we need to make sure that the entry from the cache has the same pointer as the lastTraversedNode - // to verify that there isn't just a new cache entry with the same key (i.e. in case lastTraversedNode got evicted) - if entryFromCache, isInCache := cache.get(lastTraversedNode.Key); isInCache && entryFromCache == lastTraversedNode { - current = lastTraversedNode - } - } - if current == cache.tail { - if Debug { - log.Printf("There are currently %d entries in the cache. The last walk resulted in finding %d expired keys", len(cache.entries), totalNumberOfExpiredKeysInPreviousRunFromTailToHead) - } - totalNumberOfExpiredKeysInPreviousRunFromTailToHead = 0 - } - for current != nil { - // since we're walking from the tail to the head, we get the previous reference - var previous *Entry - steps++ - if current.Expired() { - expiredEntriesFound++ - // Because delete will remove the previous reference from the entry, we need to store the - // previous reference before we delete it - previous = current.previous - cache.delete(current.Key) - cache.stats.ExpiredKeys++ - } - if current == cache.head { - lastTraversedNode = nil - break - } - // Travel to the current node's previous node only if no specific previous node has been specified - if previous != nil { - current = previous - } else { - current = current.previous - } - lastTraversedNode = current - if steps == JanitorMaxIterationsPerShift || expiredEntriesFound >= JanitorShiftTarget { - if expiredEntriesFound > 0 { - backOff = JanitorMinShiftBackOff - } else { - if backOff*2 <= JanitorMaxShiftBackOff { - backOff *= 2 - } else { - backOff = JanitorMaxShiftBackOff - } - } - break - } - } - if Debug { - log.Printf("traversed %d nodes and found %d expired entries in %s before stopping\n", steps, expiredEntriesFound, time.Since(start)) - } - totalNumberOfExpiredKeysInPreviousRunFromTailToHead += expiredEntriesFound - } else { - if backOff*2 < JanitorMaxShiftBackOff { - backOff *= 2 - } else { - backOff = JanitorMaxShiftBackOff - } - } - cache.mutex.Unlock() - case <-cache.stopJanitor: - cache.stopJanitor <- true - return - } - } - }() - //if Debug { - // go func() { - // var m runtime.MemStats - // for { - // runtime.ReadMemStats(&m) - // log.Printf("Alloc=%vMB; HeapReleased=%vMB; Sys=%vMB; HeapInUse=%vMB; HeapObjects=%v; HeapObjectsFreed=%v; GC=%v; cache.memoryUsage=%vMB; cacheSize=%d\n", m.Alloc/1024/1024, m.HeapReleased/1024/1024, m.Sys/1024/1024, m.HeapInuse/1024/1024, m.HeapObjects, m.Frees, m.NumGC, cache.memoryUsage/1024/1024, cache.Count()) - // time.Sleep(3 * time.Second) - // } - // }() - //} - return nil -} - -// StopJanitor stops the janitor -func (cache *Cache) StopJanitor() { - if cache.stopJanitor != nil { - // Tell the janitor to stop, and then wait for the janitor to reply on the same channel that it's stopping - // This may seem a bit odd, but this allows us to avoid a data race condition when trying to set - // cache.stopJanitor to nil - cache.stopJanitor <- true - <-cache.stopJanitor - cache.stopJanitor = nil - } -} diff --git a/vendor/github.com/TwiN/gocache/pattern.go b/vendor/github.com/TwiN/gocache/pattern.go deleted file mode 100644 index a1bb32b8..00000000 --- a/vendor/github.com/TwiN/gocache/pattern.go +++ /dev/null @@ -1,12 +0,0 @@ -package gocache - -import "path/filepath" - -// MatchPattern checks whether a string matches a pattern -func MatchPattern(pattern, s string) bool { - if pattern == "*" { - return true - } - matched, _ := filepath.Match(pattern, s) - return matched -} diff --git a/vendor/github.com/TwiN/gocache/persistence.go b/vendor/github.com/TwiN/gocache/persistence.go deleted file mode 100644 index c3d55c97..00000000 --- a/vendor/github.com/TwiN/gocache/persistence.go +++ /dev/null @@ -1,154 +0,0 @@ -package gocache - -import ( - "bytes" - "encoding/gob" - "log" - "os" - "sort" - "time" - - bolt "go.etcd.io/bbolt" -) - -// SaveToFile stores the content of the cache to a file so that it can be read using -// the ReadFromFile function -func (cache *Cache) SaveToFile(path string) error { - db, err := bolt.Open(path, os.ModePerm, nil) - if err != nil { - return err - } - start := time.Now() - cache.mutex.RLock() - bulkEntries := make([]*Entry, len(cache.entries)) - i := 0 - for _, v := range cache.entries { - bulkEntries[i] = v - i++ - } - cache.mutex.RUnlock() - if Debug { - log.Printf("unlocked after %s", time.Since(start)) - } - err = db.Update(func(tx *bolt.Tx) error { - _ = tx.DeleteBucket([]byte("entries")) - bucket, err := tx.CreateBucket([]byte("entries")) - if err != nil { - return err - } - for _, bulkEntry := range bulkEntries { - buffer := bytes.Buffer{} - err = gob.NewEncoder(&buffer).Encode(bulkEntry) - if err != nil { - // Failed to encode the value, so we'll skip it. - // This is likely due to the fact that the custom struct wasn't registered using gob.Register(...) - // See [Persistence - Limitations](https://github.com/TwiN/gocache#limitations) - continue - } - bucket.Put([]byte(bulkEntry.Key), buffer.Bytes()) - } - return nil - }) - if err != nil { - return err - } - return db.Close() -} - -// ReadFromFile populates the cache using a file created using cache.SaveToFile(path) -// -// Note that if the number of entries retrieved from the file exceed the configured maxSize, -// the extra entries will be automatically evicted according to the EvictionPolicy configured. -// This function returns the number of entries evicted, and because this function only reads -// from a file and does not modify it, you can safely retry this function after configuring -// the cache with the appropriate maxSize, should you desire to. -func (cache *Cache) ReadFromFile(path string) (int, error) { - db, err := bolt.Open(path, os.ModePerm, nil) - if err != nil { - return 0, err - } - defer db.Close() - cache.mutex.Lock() - defer cache.mutex.Unlock() - err = db.View(func(tx *bolt.Tx) error { - bucket := tx.Bucket([]byte("entries")) - // If the bucket doesn't exist, there's nothing to read, so we'll return right now - if bucket == nil { - return nil - } - err = bucket.ForEach(func(k, v []byte) error { - buffer := new(bytes.Buffer) - decoder := gob.NewDecoder(buffer) - entry := Entry{} - buffer.Write(v) - err := decoder.Decode(&entry) - if err != nil { - // Failed to decode the value, so we'll skip it. - // This is likely due to the fact that the custom struct wasn't registered using gob.Register(...) - // - // Could also be due to a breaking change in a struct's variable. For instance, if the struct has - // a variable with a type map[string]string and that variable is modified to map[string]int, - // decoding the struct would fail. This can be avoided by using a different variable name every - // time you must change the type of a variable within a struct. - // - // See [Persistence - Limitations](https://github.com/TwiN/gocache#limitations) - return err - } - cache.entries[string(k)] = &entry - buffer.Reset() - return nil - }) - return err - }) - if err != nil { - return 0, err - } - // Because pointers don't get stored in the file, we need to relink everything from head to tail - var entries []*Entry - for _, v := range cache.entries { - entries = append(entries, v) - } - // Sort the slice of entries from oldest to newest - sort.Slice(entries, func(i, j int) bool { - return entries[i].RelevantTimestamp.Before(entries[j].RelevantTimestamp) - }) - // Relink the nodes from tail to head - var previous *Entry - for i := range entries { - current := entries[i] - if previous == nil { - cache.tail = current - cache.head = current - } else { - previous.previous = current - current.next = previous - cache.head = current - } - previous = entries[i] - if cache.maxMemoryUsage != NoMaxMemoryUsage { - cache.memoryUsage += current.SizeInBytes() - } - } - // If the cache doesn't have a maxSize/maxMemoryUsage, then there's no point checking if we need to evict - // an entry, so we'll just return now - if cache.maxSize == NoMaxSize && cache.maxMemoryUsage == NoMaxMemoryUsage { - return 0, nil - } - // Evict what needs to be evicted - numberOfEvictions := 0 - // If there's a maxSize and the cache has more entries than the maxSize, evict - if cache.maxSize != NoMaxSize && len(cache.entries) > cache.maxSize { - for len(cache.entries) > cache.maxSize { - numberOfEvictions++ - cache.evict() - } - } - // If there's a maxMemoryUsage and the memoryUsage is above the maxMemoryUsage, evict - if cache.maxMemoryUsage != NoMaxMemoryUsage && cache.memoryUsage > cache.maxMemoryUsage { - for cache.memoryUsage > cache.maxMemoryUsage && len(cache.entries) > 0 { - numberOfEvictions++ - cache.evict() - } - } - return numberOfEvictions, nil -} diff --git a/vendor/github.com/TwiN/gocache/policy.go b/vendor/github.com/TwiN/gocache/policy.go deleted file mode 100644 index 8c914ea3..00000000 --- a/vendor/github.com/TwiN/gocache/policy.go +++ /dev/null @@ -1,33 +0,0 @@ -package gocache - -// EvictionPolicy is what dictates how evictions are handled -type EvictionPolicy string - -var ( - // LeastRecentlyUsed is an eviction policy that causes the most recently accessed cache entry to be moved to the - // head of the cache. Effectively, this causes the cache entries that have not been accessed for some time to - // gradually move closer and closer to the tail, and since the tail is the entry that gets deleted when an eviction - // is required, it allows less used cache entries to be evicted while keeping recently accessed entries at or close - // to the head. - // - // For instance, creating a Cache with a Cache.MaxSize of 3 and creating the entries 1, 2 and 3 in that order would - // put 3 at the head and 1 at the tail: - // 3 (head) -> 2 -> 1 (tail) - // If the cache entry 1 was then accessed, 1 would become the head and 2 the tail: - // 1 (head) -> 3 -> 2 (tail) - // If a cache entry 4 was then created, because the Cache.MaxSize is 3, the tail (2) would then be evicted: - // 4 (head) -> 1 -> 3 (tail) - LeastRecentlyUsed EvictionPolicy = "LeastRecentlyUsed" - - // FirstInFirstOut is an eviction policy that causes cache entries to be evicted in the same order that they are - // created. - // - // For instance, creating a Cache with a Cache.MaxSize of 3 and creating the entries 1, 2 and 3 in that order would - // put 3 at the head and 1 at the tail: - // 3 (head) -> 2 -> 1 (tail) - // If the cache entry 1 was then accessed, unlike with LeastRecentlyUsed, nothing would change: - // 3 (head) -> 2 -> 1 (tail) - // If a cache entry 4 was then created, because the Cache.MaxSize is 3, the tail (1) would then be evicted: - // 4 (head) -> 3 -> 2 (tail) - FirstInFirstOut EvictionPolicy = "FirstInFirstOut" -) diff --git a/vendor/github.com/TwiN/gocache/statistics.go b/vendor/github.com/TwiN/gocache/statistics.go deleted file mode 100644 index 32d9d160..00000000 --- a/vendor/github.com/TwiN/gocache/statistics.go +++ /dev/null @@ -1,15 +0,0 @@ -package gocache - -type Statistics struct { - // EvictedKeys is the number of keys that were evicted - EvictedKeys uint64 - - // ExpiredKeys is the number of keys that were automatically deleted as a result of expiring - ExpiredKeys uint64 - - // Hits is the number of cache hits - Hits uint64 - - // Misses is the number of cache misses - Misses uint64 -} diff --git a/vendor/go.etcd.io/bbolt/.gitignore b/vendor/go.etcd.io/bbolt/.gitignore deleted file mode 100644 index 18312f00..00000000 --- a/vendor/go.etcd.io/bbolt/.gitignore +++ /dev/null @@ -1,7 +0,0 @@ -*.prof -*.test -*.swp -/bin/ -cover.out -/.idea -*.iml diff --git a/vendor/go.etcd.io/bbolt/.travis.yml b/vendor/go.etcd.io/bbolt/.travis.yml deleted file mode 100644 index 452601e4..00000000 --- a/vendor/go.etcd.io/bbolt/.travis.yml +++ /dev/null @@ -1,18 +0,0 @@ -language: go -go_import_path: go.etcd.io/bbolt - -sudo: false - -go: -- 1.15 - -before_install: -- go get -v golang.org/x/sys/unix -- go get -v honnef.co/go/tools/... -- go get -v github.com/kisielk/errcheck - -script: -- make fmt -- make test -- make race -# - make errcheck diff --git a/vendor/go.etcd.io/bbolt/LICENSE b/vendor/go.etcd.io/bbolt/LICENSE deleted file mode 100644 index 004e77fe..00000000 --- a/vendor/go.etcd.io/bbolt/LICENSE +++ /dev/null @@ -1,20 +0,0 @@ -The MIT License (MIT) - -Copyright (c) 2013 Ben Johnson - -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software is furnished to do so, -subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS -FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR -COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER -IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN -CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/vendor/go.etcd.io/bbolt/Makefile b/vendor/go.etcd.io/bbolt/Makefile deleted file mode 100644 index 21ecf48f..00000000 --- a/vendor/go.etcd.io/bbolt/Makefile +++ /dev/null @@ -1,36 +0,0 @@ -BRANCH=`git rev-parse --abbrev-ref HEAD` -COMMIT=`git rev-parse --short HEAD` -GOLDFLAGS="-X main.branch $(BRANCH) -X main.commit $(COMMIT)" - -race: - @TEST_FREELIST_TYPE=hashmap go test -v -race -test.run="TestSimulate_(100op|1000op)" - @echo "array freelist test" - @TEST_FREELIST_TYPE=array go test -v -race -test.run="TestSimulate_(100op|1000op)" - -fmt: - !(gofmt -l -s -d $(shell find . -name \*.go) | grep '[a-z]') - -# go get honnef.co/go/tools/simple -gosimple: - gosimple ./... - -# go get honnef.co/go/tools/unused -unused: - unused ./... - -# go get github.com/kisielk/errcheck -errcheck: - @errcheck -ignorepkg=bytes -ignore=os:Remove go.etcd.io/bbolt - -test: - TEST_FREELIST_TYPE=hashmap go test -timeout 20m -v -coverprofile cover.out -covermode atomic - # Note: gets "program not an importable package" in out of path builds - TEST_FREELIST_TYPE=hashmap go test -v ./cmd/bbolt - - @echo "array freelist test" - - @TEST_FREELIST_TYPE=array go test -timeout 20m -v -coverprofile cover.out -covermode atomic - # Note: gets "program not an importable package" in out of path builds - @TEST_FREELIST_TYPE=array go test -v ./cmd/bbolt - -.PHONY: race fmt errcheck test gosimple unused diff --git a/vendor/go.etcd.io/bbolt/README.md b/vendor/go.etcd.io/bbolt/README.md deleted file mode 100644 index f1b4a7b2..00000000 --- a/vendor/go.etcd.io/bbolt/README.md +++ /dev/null @@ -1,958 +0,0 @@ -bbolt -===== - -[![Go Report Card](https://goreportcard.com/badge/github.com/etcd-io/bbolt?style=flat-square)](https://goreportcard.com/report/github.com/etcd-io/bbolt) -[![Coverage](https://codecov.io/gh/etcd-io/bbolt/branch/master/graph/badge.svg)](https://codecov.io/gh/etcd-io/bbolt) -[![Build Status Travis](https://img.shields.io/travis/etcd-io/bboltlabs.svg?style=flat-square&&branch=master)](https://travis-ci.com/etcd-io/bbolt) -[![Godoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://godoc.org/github.com/etcd-io/bbolt) -[![Releases](https://img.shields.io/github/release/etcd-io/bbolt/all.svg?style=flat-square)](https://github.com/etcd-io/bbolt/releases) -[![LICENSE](https://img.shields.io/github/license/etcd-io/bbolt.svg?style=flat-square)](https://github.com/etcd-io/bbolt/blob/master/LICENSE) - -bbolt is a fork of [Ben Johnson's][gh_ben] [Bolt][bolt] key/value -store. The purpose of this fork is to provide the Go community with an active -maintenance and development target for Bolt; the goal is improved reliability -and stability. bbolt includes bug fixes, performance enhancements, and features -not found in Bolt while preserving backwards compatibility with the Bolt API. - -Bolt is a pure Go key/value store inspired by [Howard Chu's][hyc_symas] -[LMDB project][lmdb]. The goal of the project is to provide a simple, -fast, and reliable database for projects that don't require a full database -server such as Postgres or MySQL. - -Since Bolt is meant to be used as such a low-level piece of functionality, -simplicity is key. The API will be small and only focus on getting values -and setting values. That's it. - -[gh_ben]: https://github.com/benbjohnson -[bolt]: https://github.com/boltdb/bolt -[hyc_symas]: https://twitter.com/hyc_symas -[lmdb]: http://symas.com/mdb/ - -## Project Status - -Bolt is stable, the API is fixed, and the file format is fixed. Full unit -test coverage and randomized black box testing are used to ensure database -consistency and thread safety. Bolt is currently used in high-load production -environments serving databases as large as 1TB. Many companies such as -Shopify and Heroku use Bolt-backed services every day. - -## Project versioning - -bbolt uses [semantic versioning](http://semver.org). -API should not change between patch and minor releases. -New minor versions may add additional features to the API. - -## Table of Contents - - - [Getting Started](#getting-started) - - [Installing](#installing) - - [Opening a database](#opening-a-database) - - [Transactions](#transactions) - - [Read-write transactions](#read-write-transactions) - - [Read-only transactions](#read-only-transactions) - - [Batch read-write transactions](#batch-read-write-transactions) - - [Managing transactions manually](#managing-transactions-manually) - - [Using buckets](#using-buckets) - - [Using key/value pairs](#using-keyvalue-pairs) - - [Autoincrementing integer for the bucket](#autoincrementing-integer-for-the-bucket) - - [Iterating over keys](#iterating-over-keys) - - [Prefix scans](#prefix-scans) - - [Range scans](#range-scans) - - [ForEach()](#foreach) - - [Nested buckets](#nested-buckets) - - [Database backups](#database-backups) - - [Statistics](#statistics) - - [Read-Only Mode](#read-only-mode) - - [Mobile Use (iOS/Android)](#mobile-use-iosandroid) - - [Resources](#resources) - - [Comparison with other databases](#comparison-with-other-databases) - - [Postgres, MySQL, & other relational databases](#postgres-mysql--other-relational-databases) - - [LevelDB, RocksDB](#leveldb-rocksdb) - - [LMDB](#lmdb) - - [Caveats & Limitations](#caveats--limitations) - - [Reading the Source](#reading-the-source) - - [Other Projects Using Bolt](#other-projects-using-bolt) - -## Getting Started - -### Installing - -To start using Bolt, install Go and run `go get`: - -```sh -$ go get go.etcd.io/bbolt/... -``` - -This will retrieve the library and install the `bolt` command line utility into -your `$GOBIN` path. - - -### Importing bbolt - -To use bbolt as an embedded key-value store, import as: - -```go -import bolt "go.etcd.io/bbolt" - -db, err := bolt.Open(path, 0666, nil) -if err != nil { - return err -} -defer db.Close() -``` - - -### Opening a database - -The top-level object in Bolt is a `DB`. It is represented as a single file on -your disk and represents a consistent snapshot of your data. - -To open your database, simply use the `bolt.Open()` function: - -```go -package main - -import ( - "log" - - bolt "go.etcd.io/bbolt" -) - -func main() { - // Open the my.db data file in your current directory. - // It will be created if it doesn't exist. - db, err := bolt.Open("my.db", 0600, nil) - if err != nil { - log.Fatal(err) - } - defer db.Close() - - ... -} -``` - -Please note that Bolt obtains a file lock on the data file so multiple processes -cannot open the same database at the same time. Opening an already open Bolt -database will cause it to hang until the other process closes it. To prevent -an indefinite wait you can pass a timeout option to the `Open()` function: - -```go -db, err := bolt.Open("my.db", 0600, &bolt.Options{Timeout: 1 * time.Second}) -``` - - -### Transactions - -Bolt allows only one read-write transaction at a time but allows as many -read-only transactions as you want at a time. Each transaction has a consistent -view of the data as it existed when the transaction started. - -Individual transactions and all objects created from them (e.g. buckets, keys) -are not thread safe. To work with data in multiple goroutines you must start -a transaction for each one or use locking to ensure only one goroutine accesses -a transaction at a time. Creating transaction from the `DB` is thread safe. - -Transactions should not depend on one another and generally shouldn't be opened -simultaneously in the same goroutine. This can cause a deadlock as the read-write -transaction needs to periodically re-map the data file but it cannot do so while -any read-only transaction is open. Even a nested read-only transaction can cause -a deadlock, as the child transaction can block the parent transaction from releasing -its resources. - -#### Read-write transactions - -To start a read-write transaction, you can use the `DB.Update()` function: - -```go -err := db.Update(func(tx *bolt.Tx) error { - ... - return nil -}) -``` - -Inside the closure, you have a consistent view of the database. You commit the -transaction by returning `nil` at the end. You can also rollback the transaction -at any point by returning an error. All database operations are allowed inside -a read-write transaction. - -Always check the return error as it will report any disk failures that can cause -your transaction to not complete. If you return an error within your closure -it will be passed through. - - -#### Read-only transactions - -To start a read-only transaction, you can use the `DB.View()` function: - -```go -err := db.View(func(tx *bolt.Tx) error { - ... - return nil -}) -``` - -You also get a consistent view of the database within this closure, however, -no mutating operations are allowed within a read-only transaction. You can only -retrieve buckets, retrieve values, and copy the database within a read-only -transaction. - - -#### Batch read-write transactions - -Each `DB.Update()` waits for disk to commit the writes. This overhead -can be minimized by combining multiple updates with the `DB.Batch()` -function: - -```go -err := db.Batch(func(tx *bolt.Tx) error { - ... - return nil -}) -``` - -Concurrent Batch calls are opportunistically combined into larger -transactions. Batch is only useful when there are multiple goroutines -calling it. - -The trade-off is that `Batch` can call the given -function multiple times, if parts of the transaction fail. The -function must be idempotent and side effects must take effect only -after a successful return from `DB.Batch()`. - -For example: don't display messages from inside the function, instead -set variables in the enclosing scope: - -```go -var id uint64 -err := db.Batch(func(tx *bolt.Tx) error { - // Find last key in bucket, decode as bigendian uint64, increment - // by one, encode back to []byte, and add new key. - ... - id = newValue - return nil -}) -if err != nil { - return ... -} -fmt.Println("Allocated ID %d", id) -``` - - -#### Managing transactions manually - -The `DB.View()` and `DB.Update()` functions are wrappers around the `DB.Begin()` -function. These helper functions will start the transaction, execute a function, -and then safely close your transaction if an error is returned. This is the -recommended way to use Bolt transactions. - -However, sometimes you may want to manually start and end your transactions. -You can use the `DB.Begin()` function directly but **please** be sure to close -the transaction. - -```go -// Start a writable transaction. -tx, err := db.Begin(true) -if err != nil { - return err -} -defer tx.Rollback() - -// Use the transaction... -_, err := tx.CreateBucket([]byte("MyBucket")) -if err != nil { - return err -} - -// Commit the transaction and check for error. -if err := tx.Commit(); err != nil { - return err -} -``` - -The first argument to `DB.Begin()` is a boolean stating if the transaction -should be writable. - - -### Using buckets - -Buckets are collections of key/value pairs within the database. All keys in a -bucket must be unique. You can create a bucket using the `Tx.CreateBucket()` -function: - -```go -db.Update(func(tx *bolt.Tx) error { - b, err := tx.CreateBucket([]byte("MyBucket")) - if err != nil { - return fmt.Errorf("create bucket: %s", err) - } - return nil -}) -``` - -You can also create a bucket only if it doesn't exist by using the -`Tx.CreateBucketIfNotExists()` function. It's a common pattern to call this -function for all your top-level buckets after you open your database so you can -guarantee that they exist for future transactions. - -To delete a bucket, simply call the `Tx.DeleteBucket()` function. - - -### Using key/value pairs - -To save a key/value pair to a bucket, use the `Bucket.Put()` function: - -```go -db.Update(func(tx *bolt.Tx) error { - b := tx.Bucket([]byte("MyBucket")) - err := b.Put([]byte("answer"), []byte("42")) - return err -}) -``` - -This will set the value of the `"answer"` key to `"42"` in the `MyBucket` -bucket. To retrieve this value, we can use the `Bucket.Get()` function: - -```go -db.View(func(tx *bolt.Tx) error { - b := tx.Bucket([]byte("MyBucket")) - v := b.Get([]byte("answer")) - fmt.Printf("The answer is: %s\n", v) - return nil -}) -``` - -The `Get()` function does not return an error because its operation is -guaranteed to work (unless there is some kind of system failure). If the key -exists then it will return its byte slice value. If it doesn't exist then it -will return `nil`. It's important to note that you can have a zero-length value -set to a key which is different than the key not existing. - -Use the `Bucket.Delete()` function to delete a key from the bucket. - -Please note that values returned from `Get()` are only valid while the -transaction is open. If you need to use a value outside of the transaction -then you must use `copy()` to copy it to another byte slice. - - -### Autoincrementing integer for the bucket -By using the `NextSequence()` function, you can let Bolt determine a sequence -which can be used as the unique identifier for your key/value pairs. See the -example below. - -```go -// CreateUser saves u to the store. The new user ID is set on u once the data is persisted. -func (s *Store) CreateUser(u *User) error { - return s.db.Update(func(tx *bolt.Tx) error { - // Retrieve the users bucket. - // This should be created when the DB is first opened. - b := tx.Bucket([]byte("users")) - - // Generate ID for the user. - // This returns an error only if the Tx is closed or not writeable. - // That can't happen in an Update() call so I ignore the error check. - id, _ := b.NextSequence() - u.ID = int(id) - - // Marshal user data into bytes. - buf, err := json.Marshal(u) - if err != nil { - return err - } - - // Persist bytes to users bucket. - return b.Put(itob(u.ID), buf) - }) -} - -// itob returns an 8-byte big endian representation of v. -func itob(v int) []byte { - b := make([]byte, 8) - binary.BigEndian.PutUint64(b, uint64(v)) - return b -} - -type User struct { - ID int - ... -} -``` - -### Iterating over keys - -Bolt stores its keys in byte-sorted order within a bucket. This makes sequential -iteration over these keys extremely fast. To iterate over keys we'll use a -`Cursor`: - -```go -db.View(func(tx *bolt.Tx) error { - // Assume bucket exists and has keys - b := tx.Bucket([]byte("MyBucket")) - - c := b.Cursor() - - for k, v := c.First(); k != nil; k, v = c.Next() { - fmt.Printf("key=%s, value=%s\n", k, v) - } - - return nil -}) -``` - -The cursor allows you to move to a specific point in the list of keys and move -forward or backward through the keys one at a time. - -The following functions are available on the cursor: - -``` -First() Move to the first key. -Last() Move to the last key. -Seek() Move to a specific key. -Next() Move to the next key. -Prev() Move to the previous key. -``` - -Each of those functions has a return signature of `(key []byte, value []byte)`. -When you have iterated to the end of the cursor then `Next()` will return a -`nil` key. You must seek to a position using `First()`, `Last()`, or `Seek()` -before calling `Next()` or `Prev()`. If you do not seek to a position then -these functions will return a `nil` key. - -During iteration, if the key is non-`nil` but the value is `nil`, that means -the key refers to a bucket rather than a value. Use `Bucket.Bucket()` to -access the sub-bucket. - - -#### Prefix scans - -To iterate over a key prefix, you can combine `Seek()` and `bytes.HasPrefix()`: - -```go -db.View(func(tx *bolt.Tx) error { - // Assume bucket exists and has keys - c := tx.Bucket([]byte("MyBucket")).Cursor() - - prefix := []byte("1234") - for k, v := c.Seek(prefix); k != nil && bytes.HasPrefix(k, prefix); k, v = c.Next() { - fmt.Printf("key=%s, value=%s\n", k, v) - } - - return nil -}) -``` - -#### Range scans - -Another common use case is scanning over a range such as a time range. If you -use a sortable time encoding such as RFC3339 then you can query a specific -date range like this: - -```go -db.View(func(tx *bolt.Tx) error { - // Assume our events bucket exists and has RFC3339 encoded time keys. - c := tx.Bucket([]byte("Events")).Cursor() - - // Our time range spans the 90's decade. - min := []byte("1990-01-01T00:00:00Z") - max := []byte("2000-01-01T00:00:00Z") - - // Iterate over the 90's. - for k, v := c.Seek(min); k != nil && bytes.Compare(k, max) <= 0; k, v = c.Next() { - fmt.Printf("%s: %s\n", k, v) - } - - return nil -}) -``` - -Note that, while RFC3339 is sortable, the Golang implementation of RFC3339Nano does not use a fixed number of digits after the decimal point and is therefore not sortable. - - -#### ForEach() - -You can also use the function `ForEach()` if you know you'll be iterating over -all the keys in a bucket: - -```go -db.View(func(tx *bolt.Tx) error { - // Assume bucket exists and has keys - b := tx.Bucket([]byte("MyBucket")) - - b.ForEach(func(k, v []byte) error { - fmt.Printf("key=%s, value=%s\n", k, v) - return nil - }) - return nil -}) -``` - -Please note that keys and values in `ForEach()` are only valid while -the transaction is open. If you need to use a key or value outside of -the transaction, you must use `copy()` to copy it to another byte -slice. - -### Nested buckets - -You can also store a bucket in a key to create nested buckets. The API is the -same as the bucket management API on the `DB` object: - -```go -func (*Bucket) CreateBucket(key []byte) (*Bucket, error) -func (*Bucket) CreateBucketIfNotExists(key []byte) (*Bucket, error) -func (*Bucket) DeleteBucket(key []byte) error -``` - -Say you had a multi-tenant application where the root level bucket was the account bucket. Inside of this bucket was a sequence of accounts which themselves are buckets. And inside the sequence bucket you could have many buckets pertaining to the Account itself (Users, Notes, etc) isolating the information into logical groupings. - -```go - -// createUser creates a new user in the given account. -func createUser(accountID int, u *User) error { - // Start the transaction. - tx, err := db.Begin(true) - if err != nil { - return err - } - defer tx.Rollback() - - // Retrieve the root bucket for the account. - // Assume this has already been created when the account was set up. - root := tx.Bucket([]byte(strconv.FormatUint(accountID, 10))) - - // Setup the users bucket. - bkt, err := root.CreateBucketIfNotExists([]byte("USERS")) - if err != nil { - return err - } - - // Generate an ID for the new user. - userID, err := bkt.NextSequence() - if err != nil { - return err - } - u.ID = userID - - // Marshal and save the encoded user. - if buf, err := json.Marshal(u); err != nil { - return err - } else if err := bkt.Put([]byte(strconv.FormatUint(u.ID, 10)), buf); err != nil { - return err - } - - // Commit the transaction. - if err := tx.Commit(); err != nil { - return err - } - - return nil -} - -``` - - - - -### Database backups - -Bolt is a single file so it's easy to backup. You can use the `Tx.WriteTo()` -function to write a consistent view of the database to a writer. If you call -this from a read-only transaction, it will perform a hot backup and not block -your other database reads and writes. - -By default, it will use a regular file handle which will utilize the operating -system's page cache. See the [`Tx`](https://godoc.org/go.etcd.io/bbolt#Tx) -documentation for information about optimizing for larger-than-RAM datasets. - -One common use case is to backup over HTTP so you can use tools like `cURL` to -do database backups: - -```go -func BackupHandleFunc(w http.ResponseWriter, req *http.Request) { - err := db.View(func(tx *bolt.Tx) error { - w.Header().Set("Content-Type", "application/octet-stream") - w.Header().Set("Content-Disposition", `attachment; filename="my.db"`) - w.Header().Set("Content-Length", strconv.Itoa(int(tx.Size()))) - _, err := tx.WriteTo(w) - return err - }) - if err != nil { - http.Error(w, err.Error(), http.StatusInternalServerError) - } -} -``` - -Then you can backup using this command: - -```sh -$ curl http://localhost/backup > my.db -``` - -Or you can open your browser to `http://localhost/backup` and it will download -automatically. - -If you want to backup to another file you can use the `Tx.CopyFile()` helper -function. - - -### Statistics - -The database keeps a running count of many of the internal operations it -performs so you can better understand what's going on. By grabbing a snapshot -of these stats at two points in time we can see what operations were performed -in that time range. - -For example, we could start a goroutine to log stats every 10 seconds: - -```go -go func() { - // Grab the initial stats. - prev := db.Stats() - - for { - // Wait for 10s. - time.Sleep(10 * time.Second) - - // Grab the current stats and diff them. - stats := db.Stats() - diff := stats.Sub(&prev) - - // Encode stats to JSON and print to STDERR. - json.NewEncoder(os.Stderr).Encode(diff) - - // Save stats for the next loop. - prev = stats - } -}() -``` - -It's also useful to pipe these stats to a service such as statsd for monitoring -or to provide an HTTP endpoint that will perform a fixed-length sample. - - -### Read-Only Mode - -Sometimes it is useful to create a shared, read-only Bolt database. To this, -set the `Options.ReadOnly` flag when opening your database. Read-only mode -uses a shared lock to allow multiple processes to read from the database but -it will block any processes from opening the database in read-write mode. - -```go -db, err := bolt.Open("my.db", 0666, &bolt.Options{ReadOnly: true}) -if err != nil { - log.Fatal(err) -} -``` - -### Mobile Use (iOS/Android) - -Bolt is able to run on mobile devices by leveraging the binding feature of the -[gomobile](https://github.com/golang/mobile) tool. Create a struct that will -contain your database logic and a reference to a `*bolt.DB` with a initializing -constructor that takes in a filepath where the database file will be stored. -Neither Android nor iOS require extra permissions or cleanup from using this method. - -```go -func NewBoltDB(filepath string) *BoltDB { - db, err := bolt.Open(filepath+"/demo.db", 0600, nil) - if err != nil { - log.Fatal(err) - } - - return &BoltDB{db} -} - -type BoltDB struct { - db *bolt.DB - ... -} - -func (b *BoltDB) Path() string { - return b.db.Path() -} - -func (b *BoltDB) Close() { - b.db.Close() -} -``` - -Database logic should be defined as methods on this wrapper struct. - -To initialize this struct from the native language (both platforms now sync -their local storage to the cloud. These snippets disable that functionality for the -database file): - -#### Android - -```java -String path; -if (android.os.Build.VERSION.SDK_INT >=android.os.Build.VERSION_CODES.LOLLIPOP){ - path = getNoBackupFilesDir().getAbsolutePath(); -} else{ - path = getFilesDir().getAbsolutePath(); -} -Boltmobiledemo.BoltDB boltDB = Boltmobiledemo.NewBoltDB(path) -``` - -#### iOS - -```objc -- (void)demo { - NSString* path = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, - NSUserDomainMask, - YES) objectAtIndex:0]; - GoBoltmobiledemoBoltDB * demo = GoBoltmobiledemoNewBoltDB(path); - [self addSkipBackupAttributeToItemAtPath:demo.path]; - //Some DB Logic would go here - [demo close]; -} - -- (BOOL)addSkipBackupAttributeToItemAtPath:(NSString *) filePathString -{ - NSURL* URL= [NSURL fileURLWithPath: filePathString]; - assert([[NSFileManager defaultManager] fileExistsAtPath: [URL path]]); - - NSError *error = nil; - BOOL success = [URL setResourceValue: [NSNumber numberWithBool: YES] - forKey: NSURLIsExcludedFromBackupKey error: &error]; - if(!success){ - NSLog(@"Error excluding %@ from backup %@", [URL lastPathComponent], error); - } - return success; -} - -``` - -## Resources - -For more information on getting started with Bolt, check out the following articles: - -* [Intro to BoltDB: Painless Performant Persistence](http://npf.io/2014/07/intro-to-boltdb-painless-performant-persistence/) by [Nate Finch](https://github.com/natefinch). -* [Bolt -- an embedded key/value database for Go](https://www.progville.com/go/bolt-embedded-db-golang/) by Progville - - -## Comparison with other databases - -### Postgres, MySQL, & other relational databases - -Relational databases structure data into rows and are only accessible through -the use of SQL. This approach provides flexibility in how you store and query -your data but also incurs overhead in parsing and planning SQL statements. Bolt -accesses all data by a byte slice key. This makes Bolt fast to read and write -data by key but provides no built-in support for joining values together. - -Most relational databases (with the exception of SQLite) are standalone servers -that run separately from your application. This gives your systems -flexibility to connect multiple application servers to a single database -server but also adds overhead in serializing and transporting data over the -network. Bolt runs as a library included in your application so all data access -has to go through your application's process. This brings data closer to your -application but limits multi-process access to the data. - - -### LevelDB, RocksDB - -LevelDB and its derivatives (RocksDB, HyperLevelDB) are similar to Bolt in that -they are libraries bundled into the application, however, their underlying -structure is a log-structured merge-tree (LSM tree). An LSM tree optimizes -random writes by using a write ahead log and multi-tiered, sorted files called -SSTables. Bolt uses a B+tree internally and only a single file. Both approaches -have trade-offs. - -If you require a high random write throughput (>10,000 w/sec) or you need to use -spinning disks then LevelDB could be a good choice. If your application is -read-heavy or does a lot of range scans then Bolt could be a good choice. - -One other important consideration is that LevelDB does not have transactions. -It supports batch writing of key/values pairs and it supports read snapshots -but it will not give you the ability to do a compare-and-swap operation safely. -Bolt supports fully serializable ACID transactions. - - -### LMDB - -Bolt was originally a port of LMDB so it is architecturally similar. Both use -a B+tree, have ACID semantics with fully serializable transactions, and support -lock-free MVCC using a single writer and multiple readers. - -The two projects have somewhat diverged. LMDB heavily focuses on raw performance -while Bolt has focused on simplicity and ease of use. For example, LMDB allows -several unsafe actions such as direct writes for the sake of performance. Bolt -opts to disallow actions which can leave the database in a corrupted state. The -only exception to this in Bolt is `DB.NoSync`. - -There are also a few differences in API. LMDB requires a maximum mmap size when -opening an `mdb_env` whereas Bolt will handle incremental mmap resizing -automatically. LMDB overloads the getter and setter functions with multiple -flags whereas Bolt splits these specialized cases into their own functions. - - -## Caveats & Limitations - -It's important to pick the right tool for the job and Bolt is no exception. -Here are a few things to note when evaluating and using Bolt: - -* Bolt is good for read intensive workloads. Sequential write performance is - also fast but random writes can be slow. You can use `DB.Batch()` or add a - write-ahead log to help mitigate this issue. - -* Bolt uses a B+tree internally so there can be a lot of random page access. - SSDs provide a significant performance boost over spinning disks. - -* Try to avoid long running read transactions. Bolt uses copy-on-write so - old pages cannot be reclaimed while an old transaction is using them. - -* Byte slices returned from Bolt are only valid during a transaction. Once the - transaction has been committed or rolled back then the memory they point to - can be reused by a new page or can be unmapped from virtual memory and you'll - see an `unexpected fault address` panic when accessing it. - -* Bolt uses an exclusive write lock on the database file so it cannot be - shared by multiple processes. - -* Be careful when using `Bucket.FillPercent`. Setting a high fill percent for - buckets that have random inserts will cause your database to have very poor - page utilization. - -* Use larger buckets in general. Smaller buckets causes poor page utilization - once they become larger than the page size (typically 4KB). - -* Bulk loading a lot of random writes into a new bucket can be slow as the - page will not split until the transaction is committed. Randomly inserting - more than 100,000 key/value pairs into a single new bucket in a single - transaction is not advised. - -* Bolt uses a memory-mapped file so the underlying operating system handles the - caching of the data. Typically, the OS will cache as much of the file as it - can in memory and will release memory as needed to other processes. This means - that Bolt can show very high memory usage when working with large databases. - However, this is expected and the OS will release memory as needed. Bolt can - handle databases much larger than the available physical RAM, provided its - memory-map fits in the process virtual address space. It may be problematic - on 32-bits systems. - -* The data structures in the Bolt database are memory mapped so the data file - will be endian specific. This means that you cannot copy a Bolt file from a - little endian machine to a big endian machine and have it work. For most - users this is not a concern since most modern CPUs are little endian. - -* Because of the way pages are laid out on disk, Bolt cannot truncate data files - and return free pages back to the disk. Instead, Bolt maintains a free list - of unused pages within its data file. These free pages can be reused by later - transactions. This works well for many use cases as databases generally tend - to grow. However, it's important to note that deleting large chunks of data - will not allow you to reclaim that space on disk. - - For more information on page allocation, [see this comment][page-allocation]. - -[page-allocation]: https://github.com/boltdb/bolt/issues/308#issuecomment-74811638 - - -## Reading the Source - -Bolt is a relatively small code base (<5KLOC) for an embedded, serializable, -transactional key/value database so it can be a good starting point for people -interested in how databases work. - -The best places to start are the main entry points into Bolt: - -- `Open()` - Initializes the reference to the database. It's responsible for - creating the database if it doesn't exist, obtaining an exclusive lock on the - file, reading the meta pages, & memory-mapping the file. - -- `DB.Begin()` - Starts a read-only or read-write transaction depending on the - value of the `writable` argument. This requires briefly obtaining the "meta" - lock to keep track of open transactions. Only one read-write transaction can - exist at a time so the "rwlock" is acquired during the life of a read-write - transaction. - -- `Bucket.Put()` - Writes a key/value pair into a bucket. After validating the - arguments, a cursor is used to traverse the B+tree to the page and position - where they key & value will be written. Once the position is found, the bucket - materializes the underlying page and the page's parent pages into memory as - "nodes". These nodes are where mutations occur during read-write transactions. - These changes get flushed to disk during commit. - -- `Bucket.Get()` - Retrieves a key/value pair from a bucket. This uses a cursor - to move to the page & position of a key/value pair. During a read-only - transaction, the key and value data is returned as a direct reference to the - underlying mmap file so there's no allocation overhead. For read-write - transactions, this data may reference the mmap file or one of the in-memory - node values. - -- `Cursor` - This object is simply for traversing the B+tree of on-disk pages - or in-memory nodes. It can seek to a specific key, move to the first or last - value, or it can move forward or backward. The cursor handles the movement up - and down the B+tree transparently to the end user. - -- `Tx.Commit()` - Converts the in-memory dirty nodes and the list of free pages - into pages to be written to disk. Writing to disk then occurs in two phases. - First, the dirty pages are written to disk and an `fsync()` occurs. Second, a - new meta page with an incremented transaction ID is written and another - `fsync()` occurs. This two phase write ensures that partially written data - pages are ignored in the event of a crash since the meta page pointing to them - is never written. Partially written meta pages are invalidated because they - are written with a checksum. - -If you have additional notes that could be helpful for others, please submit -them via pull request. - - -## Other Projects Using Bolt - -Below is a list of public, open source projects that use Bolt: - -* [Algernon](https://github.com/xyproto/algernon) - A HTTP/2 web server with built-in support for Lua. Uses BoltDB as the default database backend. -* [Bazil](https://bazil.org/) - A file system that lets your data reside where it is most convenient for it to reside. -* [bolter](https://github.com/hasit/bolter) - Command-line app for viewing BoltDB file in your terminal. -* [boltcli](https://github.com/spacewander/boltcli) - the redis-cli for boltdb with Lua script support. -* [BoltHold](https://github.com/timshannon/bolthold) - An embeddable NoSQL store for Go types built on BoltDB -* [BoltStore](https://github.com/yosssi/boltstore) - Session store using Bolt. -* [Boltdb Boilerplate](https://github.com/bobintornado/boltdb-boilerplate) - Boilerplate wrapper around bolt aiming to make simple calls one-liners. -* [BoltDbWeb](https://github.com/evnix/boltdbweb) - A web based GUI for BoltDB files. -* [BoltDB Viewer](https://github.com/zc310/rich_boltdb) - A BoltDB Viewer Can run on Windows、Linux、Android system. -* [bleve](http://www.blevesearch.com/) - A pure Go search engine similar to ElasticSearch that uses Bolt as the default storage backend. -* [btcwallet](https://github.com/btcsuite/btcwallet) - A bitcoin wallet. -* [buckets](https://github.com/joyrexus/buckets) - a bolt wrapper streamlining - simple tx and key scans. -* [cayley](https://github.com/google/cayley) - Cayley is an open-source graph database using Bolt as optional backend. -* [ChainStore](https://github.com/pressly/chainstore) - Simple key-value interface to a variety of storage engines organized as a chain of operations. -* [🌰 Chestnut](https://github.com/jrapoport/chestnut) - Chestnut is encrypted storage for Go. -* [Consul](https://github.com/hashicorp/consul) - Consul is service discovery and configuration made easy. Distributed, highly available, and datacenter-aware. -* [DVID](https://github.com/janelia-flyem/dvid) - Added Bolt as optional storage engine and testing it against Basho-tuned leveldb. -* [dcrwallet](https://github.com/decred/dcrwallet) - A wallet for the Decred cryptocurrency. -* [drive](https://github.com/odeke-em/drive) - drive is an unofficial Google Drive command line client for \*NIX operating systems. -* [event-shuttle](https://github.com/sclasen/event-shuttle) - A Unix system service to collect and reliably deliver messages to Kafka. -* [Freehold](http://tshannon.bitbucket.org/freehold/) - An open, secure, and lightweight platform for your files and data. -* [Go Report Card](https://goreportcard.com/) - Go code quality report cards as a (free and open source) service. -* [GoWebApp](https://github.com/josephspurrier/gowebapp) - A basic MVC web application in Go using BoltDB. -* [GoShort](https://github.com/pankajkhairnar/goShort) - GoShort is a URL shortener written in Golang and BoltDB for persistent key/value storage and for routing it's using high performent HTTPRouter. -* [gopherpit](https://github.com/gopherpit/gopherpit) - A web service to manage Go remote import paths with custom domains -* [gokv](https://github.com/philippgille/gokv) - Simple key-value store abstraction and implementations for Go (Redis, Consul, etcd, bbolt, BadgerDB, LevelDB, Memcached, DynamoDB, S3, PostgreSQL, MongoDB, CockroachDB and many more) -* [Gitchain](https://github.com/gitchain/gitchain) - Decentralized, peer-to-peer Git repositories aka "Git meets Bitcoin". -* [InfluxDB](https://influxdata.com) - Scalable datastore for metrics, events, and real-time analytics. -* [ipLocator](https://github.com/AndreasBriese/ipLocator) - A fast ip-geo-location-server using bolt with bloom filters. -* [ipxed](https://github.com/kelseyhightower/ipxed) - Web interface and api for ipxed. -* [Ironsmith](https://github.com/timshannon/ironsmith) - A simple, script-driven continuous integration (build - > test -> release) tool, with no external dependencies -* [Kala](https://github.com/ajvb/kala) - Kala is a modern job scheduler optimized to run on a single node. It is persistent, JSON over HTTP API, ISO 8601 duration notation, and dependent jobs. -* [Key Value Access Langusge (KVAL)](https://github.com/kval-access-language) - A proposed grammar for key-value datastores offering a bbolt binding. -* [LedisDB](https://github.com/siddontang/ledisdb) - A high performance NoSQL, using Bolt as optional storage. -* [lru](https://github.com/crowdriff/lru) - Easy to use Bolt-backed Least-Recently-Used (LRU) read-through cache with chainable remote stores. -* [mbuckets](https://github.com/abhigupta912/mbuckets) - A Bolt wrapper that allows easy operations on multi level (nested) buckets. -* [MetricBase](https://github.com/msiebuhr/MetricBase) - Single-binary version of Graphite. -* [MuLiFS](https://github.com/dankomiocevic/mulifs) - Music Library Filesystem creates a filesystem to organise your music files. -* [NATS](https://github.com/nats-io/nats-streaming-server) - NATS Streaming uses bbolt for message and metadata storage. -* [Prometheus Annotation Server](https://github.com/oliver006/prom_annotation_server) - Annotation server for PromDash & Prometheus service monitoring system. -* [Rain](https://github.com/cenkalti/rain) - BitTorrent client and library. -* [reef-pi](https://github.com/reef-pi/reef-pi) - reef-pi is an award winning, modular, DIY reef tank controller using easy to learn electronics based on a Raspberry Pi. -* [Request Baskets](https://github.com/darklynx/request-baskets) - A web service to collect arbitrary HTTP requests and inspect them via REST API or simple web UI, similar to [RequestBin](http://requestb.in/) service -* [Seaweed File System](https://github.com/chrislusf/seaweedfs) - Highly scalable distributed key~file system with O(1) disk read. -* [stow](https://github.com/djherbis/stow) - a persistence manager for objects - backed by boltdb. -* [Storm](https://github.com/asdine/storm) - Simple and powerful ORM for BoltDB. -* [SimpleBolt](https://github.com/xyproto/simplebolt) - A simple way to use BoltDB. Deals mainly with strings. -* [Skybox Analytics](https://github.com/skybox/skybox) - A standalone funnel analysis tool for web analytics. -* [Scuttlebutt](https://github.com/benbjohnson/scuttlebutt) - Uses Bolt to store and process all Twitter mentions of GitHub projects. -* [tentacool](https://github.com/optiflows/tentacool) - REST api server to manage system stuff (IP, DNS, Gateway...) on a linux server. -* [torrent](https://github.com/anacrolix/torrent) - Full-featured BitTorrent client package and utilities in Go. BoltDB is a storage backend in development. -* [Wiki](https://github.com/peterhellberg/wiki) - A tiny wiki using Goji, BoltDB and Blackfriday. - -If you are using Bolt in a project please send a pull request to add it to the list. diff --git a/vendor/go.etcd.io/bbolt/bolt_386.go b/vendor/go.etcd.io/bbolt/bolt_386.go deleted file mode 100644 index aee25960..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_386.go +++ /dev/null @@ -1,7 +0,0 @@ -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0x7FFFFFFF // 2GB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0xFFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_amd64.go b/vendor/go.etcd.io/bbolt/bolt_amd64.go deleted file mode 100644 index 5dd8f3f2..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_amd64.go +++ /dev/null @@ -1,7 +0,0 @@ -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0xFFFFFFFFFFFF // 256TB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0x7FFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_arm.go b/vendor/go.etcd.io/bbolt/bolt_arm.go deleted file mode 100644 index aee25960..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_arm.go +++ /dev/null @@ -1,7 +0,0 @@ -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0x7FFFFFFF // 2GB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0xFFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_arm64.go b/vendor/go.etcd.io/bbolt/bolt_arm64.go deleted file mode 100644 index 810dfd55..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_arm64.go +++ /dev/null @@ -1,9 +0,0 @@ -// +build arm64 - -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0xFFFFFFFFFFFF // 256TB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0x7FFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_linux.go b/vendor/go.etcd.io/bbolt/bolt_linux.go deleted file mode 100644 index 7707bcac..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_linux.go +++ /dev/null @@ -1,10 +0,0 @@ -package bbolt - -import ( - "syscall" -) - -// fdatasync flushes written data to a file descriptor. -func fdatasync(db *DB) error { - return syscall.Fdatasync(int(db.file.Fd())) -} diff --git a/vendor/go.etcd.io/bbolt/bolt_mips64x.go b/vendor/go.etcd.io/bbolt/bolt_mips64x.go deleted file mode 100644 index dd8ffe12..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_mips64x.go +++ /dev/null @@ -1,9 +0,0 @@ -// +build mips64 mips64le - -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0x8000000000 // 512GB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0x7FFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_mipsx.go b/vendor/go.etcd.io/bbolt/bolt_mipsx.go deleted file mode 100644 index a669703a..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_mipsx.go +++ /dev/null @@ -1,9 +0,0 @@ -// +build mips mipsle - -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0x40000000 // 1GB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0xFFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_openbsd.go b/vendor/go.etcd.io/bbolt/bolt_openbsd.go deleted file mode 100644 index d7f50358..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_openbsd.go +++ /dev/null @@ -1,27 +0,0 @@ -package bbolt - -import ( - "syscall" - "unsafe" -) - -const ( - msAsync = 1 << iota // perform asynchronous writes - msSync // perform synchronous writes - msInvalidate // invalidate cached data -) - -func msync(db *DB) error { - _, _, errno := syscall.Syscall(syscall.SYS_MSYNC, uintptr(unsafe.Pointer(db.data)), uintptr(db.datasz), msInvalidate) - if errno != 0 { - return errno - } - return nil -} - -func fdatasync(db *DB) error { - if db.data != nil { - return msync(db) - } - return db.file.Sync() -} diff --git a/vendor/go.etcd.io/bbolt/bolt_ppc.go b/vendor/go.etcd.io/bbolt/bolt_ppc.go deleted file mode 100644 index 84e545ef..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_ppc.go +++ /dev/null @@ -1,9 +0,0 @@ -// +build ppc - -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0x7FFFFFFF // 2GB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0xFFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_ppc64.go b/vendor/go.etcd.io/bbolt/bolt_ppc64.go deleted file mode 100644 index a7612090..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_ppc64.go +++ /dev/null @@ -1,9 +0,0 @@ -// +build ppc64 - -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0xFFFFFFFFFFFF // 256TB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0x7FFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_ppc64le.go b/vendor/go.etcd.io/bbolt/bolt_ppc64le.go deleted file mode 100644 index c830f2fc..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_ppc64le.go +++ /dev/null @@ -1,9 +0,0 @@ -// +build ppc64le - -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0xFFFFFFFFFFFF // 256TB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0x7FFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_riscv64.go b/vendor/go.etcd.io/bbolt/bolt_riscv64.go deleted file mode 100644 index c967613b..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_riscv64.go +++ /dev/null @@ -1,9 +0,0 @@ -// +build riscv64 - -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0xFFFFFFFFFFFF // 256TB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0x7FFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_s390x.go b/vendor/go.etcd.io/bbolt/bolt_s390x.go deleted file mode 100644 index ff2a5609..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_s390x.go +++ /dev/null @@ -1,9 +0,0 @@ -// +build s390x - -package bbolt - -// maxMapSize represents the largest mmap size supported by Bolt. -const maxMapSize = 0xFFFFFFFFFFFF // 256TB - -// maxAllocSize is the size used when creating array pointers. -const maxAllocSize = 0x7FFFFFFF diff --git a/vendor/go.etcd.io/bbolt/bolt_unix.go b/vendor/go.etcd.io/bbolt/bolt_unix.go deleted file mode 100644 index 4e5f65cc..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_unix.go +++ /dev/null @@ -1,86 +0,0 @@ -// +build !windows,!plan9,!solaris,!aix - -package bbolt - -import ( - "fmt" - "syscall" - "time" - "unsafe" - - "golang.org/x/sys/unix" -) - -// flock acquires an advisory lock on a file descriptor. -func flock(db *DB, exclusive bool, timeout time.Duration) error { - var t time.Time - if timeout != 0 { - t = time.Now() - } - fd := db.file.Fd() - flag := syscall.LOCK_NB - if exclusive { - flag |= syscall.LOCK_EX - } else { - flag |= syscall.LOCK_SH - } - for { - // Attempt to obtain an exclusive lock. - err := syscall.Flock(int(fd), flag) - if err == nil { - return nil - } else if err != syscall.EWOULDBLOCK { - return err - } - - // If we timed out then return an error. - if timeout != 0 && time.Since(t) > timeout-flockRetryTimeout { - return ErrTimeout - } - - // Wait for a bit and try again. - time.Sleep(flockRetryTimeout) - } -} - -// funlock releases an advisory lock on a file descriptor. -func funlock(db *DB) error { - return syscall.Flock(int(db.file.Fd()), syscall.LOCK_UN) -} - -// mmap memory maps a DB's data file. -func mmap(db *DB, sz int) error { - // Map the data file to memory. - b, err := unix.Mmap(int(db.file.Fd()), 0, sz, syscall.PROT_READ, syscall.MAP_SHARED|db.MmapFlags) - if err != nil { - return err - } - - // Advise the kernel that the mmap is accessed randomly. - err = unix.Madvise(b, syscall.MADV_RANDOM) - if err != nil && err != syscall.ENOSYS { - // Ignore not implemented error in kernel because it still works. - return fmt.Errorf("madvise: %s", err) - } - - // Save the original byte slice and convert to a byte array pointer. - db.dataref = b - db.data = (*[maxMapSize]byte)(unsafe.Pointer(&b[0])) - db.datasz = sz - return nil -} - -// munmap unmaps a DB's data file from memory. -func munmap(db *DB) error { - // Ignore the unmap if we have no mapped data. - if db.dataref == nil { - return nil - } - - // Unmap using the original byte slice. - err := unix.Munmap(db.dataref) - db.dataref = nil - db.data = nil - db.datasz = 0 - return err -} diff --git a/vendor/go.etcd.io/bbolt/bolt_unix_aix.go b/vendor/go.etcd.io/bbolt/bolt_unix_aix.go deleted file mode 100644 index a64c16f5..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_unix_aix.go +++ /dev/null @@ -1,90 +0,0 @@ -// +build aix - -package bbolt - -import ( - "fmt" - "syscall" - "time" - "unsafe" - - "golang.org/x/sys/unix" -) - -// flock acquires an advisory lock on a file descriptor. -func flock(db *DB, exclusive bool, timeout time.Duration) error { - var t time.Time - if timeout != 0 { - t = time.Now() - } - fd := db.file.Fd() - var lockType int16 - if exclusive { - lockType = syscall.F_WRLCK - } else { - lockType = syscall.F_RDLCK - } - for { - // Attempt to obtain an exclusive lock. - lock := syscall.Flock_t{Type: lockType} - err := syscall.FcntlFlock(fd, syscall.F_SETLK, &lock) - if err == nil { - return nil - } else if err != syscall.EAGAIN { - return err - } - - // If we timed out then return an error. - if timeout != 0 && time.Since(t) > timeout-flockRetryTimeout { - return ErrTimeout - } - - // Wait for a bit and try again. - time.Sleep(flockRetryTimeout) - } -} - -// funlock releases an advisory lock on a file descriptor. -func funlock(db *DB) error { - var lock syscall.Flock_t - lock.Start = 0 - lock.Len = 0 - lock.Type = syscall.F_UNLCK - lock.Whence = 0 - return syscall.FcntlFlock(uintptr(db.file.Fd()), syscall.F_SETLK, &lock) -} - -// mmap memory maps a DB's data file. -func mmap(db *DB, sz int) error { - // Map the data file to memory. - b, err := unix.Mmap(int(db.file.Fd()), 0, sz, syscall.PROT_READ, syscall.MAP_SHARED|db.MmapFlags) - if err != nil { - return err - } - - // Advise the kernel that the mmap is accessed randomly. - if err := unix.Madvise(b, syscall.MADV_RANDOM); err != nil { - return fmt.Errorf("madvise: %s", err) - } - - // Save the original byte slice and convert to a byte array pointer. - db.dataref = b - db.data = (*[maxMapSize]byte)(unsafe.Pointer(&b[0])) - db.datasz = sz - return nil -} - -// munmap unmaps a DB's data file from memory. -func munmap(db *DB) error { - // Ignore the unmap if we have no mapped data. - if db.dataref == nil { - return nil - } - - // Unmap using the original byte slice. - err := unix.Munmap(db.dataref) - db.dataref = nil - db.data = nil - db.datasz = 0 - return err -} diff --git a/vendor/go.etcd.io/bbolt/bolt_unix_solaris.go b/vendor/go.etcd.io/bbolt/bolt_unix_solaris.go deleted file mode 100644 index babad657..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_unix_solaris.go +++ /dev/null @@ -1,88 +0,0 @@ -package bbolt - -import ( - "fmt" - "syscall" - "time" - "unsafe" - - "golang.org/x/sys/unix" -) - -// flock acquires an advisory lock on a file descriptor. -func flock(db *DB, exclusive bool, timeout time.Duration) error { - var t time.Time - if timeout != 0 { - t = time.Now() - } - fd := db.file.Fd() - var lockType int16 - if exclusive { - lockType = syscall.F_WRLCK - } else { - lockType = syscall.F_RDLCK - } - for { - // Attempt to obtain an exclusive lock. - lock := syscall.Flock_t{Type: lockType} - err := syscall.FcntlFlock(fd, syscall.F_SETLK, &lock) - if err == nil { - return nil - } else if err != syscall.EAGAIN { - return err - } - - // If we timed out then return an error. - if timeout != 0 && time.Since(t) > timeout-flockRetryTimeout { - return ErrTimeout - } - - // Wait for a bit and try again. - time.Sleep(flockRetryTimeout) - } -} - -// funlock releases an advisory lock on a file descriptor. -func funlock(db *DB) error { - var lock syscall.Flock_t - lock.Start = 0 - lock.Len = 0 - lock.Type = syscall.F_UNLCK - lock.Whence = 0 - return syscall.FcntlFlock(uintptr(db.file.Fd()), syscall.F_SETLK, &lock) -} - -// mmap memory maps a DB's data file. -func mmap(db *DB, sz int) error { - // Map the data file to memory. - b, err := unix.Mmap(int(db.file.Fd()), 0, sz, syscall.PROT_READ, syscall.MAP_SHARED|db.MmapFlags) - if err != nil { - return err - } - - // Advise the kernel that the mmap is accessed randomly. - if err := unix.Madvise(b, syscall.MADV_RANDOM); err != nil { - return fmt.Errorf("madvise: %s", err) - } - - // Save the original byte slice and convert to a byte array pointer. - db.dataref = b - db.data = (*[maxMapSize]byte)(unsafe.Pointer(&b[0])) - db.datasz = sz - return nil -} - -// munmap unmaps a DB's data file from memory. -func munmap(db *DB) error { - // Ignore the unmap if we have no mapped data. - if db.dataref == nil { - return nil - } - - // Unmap using the original byte slice. - err := unix.Munmap(db.dataref) - db.dataref = nil - db.data = nil - db.datasz = 0 - return err -} diff --git a/vendor/go.etcd.io/bbolt/bolt_windows.go b/vendor/go.etcd.io/bbolt/bolt_windows.go deleted file mode 100644 index fca178bd..00000000 --- a/vendor/go.etcd.io/bbolt/bolt_windows.go +++ /dev/null @@ -1,141 +0,0 @@ -package bbolt - -import ( - "fmt" - "os" - "syscall" - "time" - "unsafe" -) - -// LockFileEx code derived from golang build filemutex_windows.go @ v1.5.1 -var ( - modkernel32 = syscall.NewLazyDLL("kernel32.dll") - procLockFileEx = modkernel32.NewProc("LockFileEx") - procUnlockFileEx = modkernel32.NewProc("UnlockFileEx") -) - -const ( - // see https://msdn.microsoft.com/en-us/library/windows/desktop/aa365203(v=vs.85).aspx - flagLockExclusive = 2 - flagLockFailImmediately = 1 - - // see https://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx - errLockViolation syscall.Errno = 0x21 -) - -func lockFileEx(h syscall.Handle, flags, reserved, locklow, lockhigh uint32, ol *syscall.Overlapped) (err error) { - r, _, err := procLockFileEx.Call(uintptr(h), uintptr(flags), uintptr(reserved), uintptr(locklow), uintptr(lockhigh), uintptr(unsafe.Pointer(ol))) - if r == 0 { - return err - } - return nil -} - -func unlockFileEx(h syscall.Handle, reserved, locklow, lockhigh uint32, ol *syscall.Overlapped) (err error) { - r, _, err := procUnlockFileEx.Call(uintptr(h), uintptr(reserved), uintptr(locklow), uintptr(lockhigh), uintptr(unsafe.Pointer(ol)), 0) - if r == 0 { - return err - } - return nil -} - -// fdatasync flushes written data to a file descriptor. -func fdatasync(db *DB) error { - return db.file.Sync() -} - -// flock acquires an advisory lock on a file descriptor. -func flock(db *DB, exclusive bool, timeout time.Duration) error { - var t time.Time - if timeout != 0 { - t = time.Now() - } - var flag uint32 = flagLockFailImmediately - if exclusive { - flag |= flagLockExclusive - } - for { - // Fix for https://github.com/etcd-io/bbolt/issues/121. Use byte-range - // -1..0 as the lock on the database file. - var m1 uint32 = (1 << 32) - 1 // -1 in a uint32 - err := lockFileEx(syscall.Handle(db.file.Fd()), flag, 0, 1, 0, &syscall.Overlapped{ - Offset: m1, - OffsetHigh: m1, - }) - - if err == nil { - return nil - } else if err != errLockViolation { - return err - } - - // If we timed oumercit then return an error. - if timeout != 0 && time.Since(t) > timeout-flockRetryTimeout { - return ErrTimeout - } - - // Wait for a bit and try again. - time.Sleep(flockRetryTimeout) - } -} - -// funlock releases an advisory lock on a file descriptor. -func funlock(db *DB) error { - var m1 uint32 = (1 << 32) - 1 // -1 in a uint32 - err := unlockFileEx(syscall.Handle(db.file.Fd()), 0, 1, 0, &syscall.Overlapped{ - Offset: m1, - OffsetHigh: m1, - }) - return err -} - -// mmap memory maps a DB's data file. -// Based on: https://github.com/edsrzf/mmap-go -func mmap(db *DB, sz int) error { - if !db.readOnly { - // Truncate the database to the size of the mmap. - if err := db.file.Truncate(int64(sz)); err != nil { - return fmt.Errorf("truncate: %s", err) - } - } - - // Open a file mapping handle. - sizelo := uint32(sz >> 32) - sizehi := uint32(sz) & 0xffffffff - h, errno := syscall.CreateFileMapping(syscall.Handle(db.file.Fd()), nil, syscall.PAGE_READONLY, sizelo, sizehi, nil) - if h == 0 { - return os.NewSyscallError("CreateFileMapping", errno) - } - - // Create the memory map. - addr, errno := syscall.MapViewOfFile(h, syscall.FILE_MAP_READ, 0, 0, uintptr(sz)) - if addr == 0 { - return os.NewSyscallError("MapViewOfFile", errno) - } - - // Close mapping handle. - if err := syscall.CloseHandle(syscall.Handle(h)); err != nil { - return os.NewSyscallError("CloseHandle", err) - } - - // Convert to a byte array. - db.data = ((*[maxMapSize]byte)(unsafe.Pointer(addr))) - db.datasz = sz - - return nil -} - -// munmap unmaps a pointer from a file. -// Based on: https://github.com/edsrzf/mmap-go -func munmap(db *DB) error { - if db.data == nil { - return nil - } - - addr := (uintptr)(unsafe.Pointer(&db.data[0])) - if err := syscall.UnmapViewOfFile(addr); err != nil { - return os.NewSyscallError("UnmapViewOfFile", err) - } - return nil -} diff --git a/vendor/go.etcd.io/bbolt/boltsync_unix.go b/vendor/go.etcd.io/bbolt/boltsync_unix.go deleted file mode 100644 index 9587afef..00000000 --- a/vendor/go.etcd.io/bbolt/boltsync_unix.go +++ /dev/null @@ -1,8 +0,0 @@ -// +build !windows,!plan9,!linux,!openbsd - -package bbolt - -// fdatasync flushes written data to a file descriptor. -func fdatasync(db *DB) error { - return db.file.Sync() -} diff --git a/vendor/go.etcd.io/bbolt/bucket.go b/vendor/go.etcd.io/bbolt/bucket.go deleted file mode 100644 index d8750b14..00000000 --- a/vendor/go.etcd.io/bbolt/bucket.go +++ /dev/null @@ -1,777 +0,0 @@ -package bbolt - -import ( - "bytes" - "fmt" - "unsafe" -) - -const ( - // MaxKeySize is the maximum length of a key, in bytes. - MaxKeySize = 32768 - - // MaxValueSize is the maximum length of a value, in bytes. - MaxValueSize = (1 << 31) - 2 -) - -const bucketHeaderSize = int(unsafe.Sizeof(bucket{})) - -const ( - minFillPercent = 0.1 - maxFillPercent = 1.0 -) - -// DefaultFillPercent is the percentage that split pages are filled. -// This value can be changed by setting Bucket.FillPercent. -const DefaultFillPercent = 0.5 - -// Bucket represents a collection of key/value pairs inside the database. -type Bucket struct { - *bucket - tx *Tx // the associated transaction - buckets map[string]*Bucket // subbucket cache - page *page // inline page reference - rootNode *node // materialized node for the root page. - nodes map[pgid]*node // node cache - - // Sets the threshold for filling nodes when they split. By default, - // the bucket will fill to 50% but it can be useful to increase this - // amount if you know that your write workloads are mostly append-only. - // - // This is non-persisted across transactions so it must be set in every Tx. - FillPercent float64 -} - -// bucket represents the on-file representation of a bucket. -// This is stored as the "value" of a bucket key. If the bucket is small enough, -// then its root page can be stored inline in the "value", after the bucket -// header. In the case of inline buckets, the "root" will be 0. -type bucket struct { - root pgid // page id of the bucket's root-level page - sequence uint64 // monotonically incrementing, used by NextSequence() -} - -// newBucket returns a new bucket associated with a transaction. -func newBucket(tx *Tx) Bucket { - var b = Bucket{tx: tx, FillPercent: DefaultFillPercent} - if tx.writable { - b.buckets = make(map[string]*Bucket) - b.nodes = make(map[pgid]*node) - } - return b -} - -// Tx returns the tx of the bucket. -func (b *Bucket) Tx() *Tx { - return b.tx -} - -// Root returns the root of the bucket. -func (b *Bucket) Root() pgid { - return b.root -} - -// Writable returns whether the bucket is writable. -func (b *Bucket) Writable() bool { - return b.tx.writable -} - -// Cursor creates a cursor associated with the bucket. -// The cursor is only valid as long as the transaction is open. -// Do not use a cursor after the transaction is closed. -func (b *Bucket) Cursor() *Cursor { - // Update transaction statistics. - b.tx.stats.CursorCount++ - - // Allocate and return a cursor. - return &Cursor{ - bucket: b, - stack: make([]elemRef, 0), - } -} - -// Bucket retrieves a nested bucket by name. -// Returns nil if the bucket does not exist. -// The bucket instance is only valid for the lifetime of the transaction. -func (b *Bucket) Bucket(name []byte) *Bucket { - if b.buckets != nil { - if child := b.buckets[string(name)]; child != nil { - return child - } - } - - // Move cursor to key. - c := b.Cursor() - k, v, flags := c.seek(name) - - // Return nil if the key doesn't exist or it is not a bucket. - if !bytes.Equal(name, k) || (flags&bucketLeafFlag) == 0 { - return nil - } - - // Otherwise create a bucket and cache it. - var child = b.openBucket(v) - if b.buckets != nil { - b.buckets[string(name)] = child - } - - return child -} - -// Helper method that re-interprets a sub-bucket value -// from a parent into a Bucket -func (b *Bucket) openBucket(value []byte) *Bucket { - var child = newBucket(b.tx) - - // Unaligned access requires a copy to be made. - const unalignedMask = unsafe.Alignof(struct { - bucket - page - }{}) - 1 - unaligned := uintptr(unsafe.Pointer(&value[0]))&unalignedMask != 0 - if unaligned { - value = cloneBytes(value) - } - - // If this is a writable transaction then we need to copy the bucket entry. - // Read-only transactions can point directly at the mmap entry. - if b.tx.writable && !unaligned { - child.bucket = &bucket{} - *child.bucket = *(*bucket)(unsafe.Pointer(&value[0])) - } else { - child.bucket = (*bucket)(unsafe.Pointer(&value[0])) - } - - // Save a reference to the inline page if the bucket is inline. - if child.root == 0 { - child.page = (*page)(unsafe.Pointer(&value[bucketHeaderSize])) - } - - return &child -} - -// CreateBucket creates a new bucket at the given key and returns the new bucket. -// Returns an error if the key already exists, if the bucket name is blank, or if the bucket name is too long. -// The bucket instance is only valid for the lifetime of the transaction. -func (b *Bucket) CreateBucket(key []byte) (*Bucket, error) { - if b.tx.db == nil { - return nil, ErrTxClosed - } else if !b.tx.writable { - return nil, ErrTxNotWritable - } else if len(key) == 0 { - return nil, ErrBucketNameRequired - } - - // Move cursor to correct position. - c := b.Cursor() - k, _, flags := c.seek(key) - - // Return an error if there is an existing key. - if bytes.Equal(key, k) { - if (flags & bucketLeafFlag) != 0 { - return nil, ErrBucketExists - } - return nil, ErrIncompatibleValue - } - - // Create empty, inline bucket. - var bucket = Bucket{ - bucket: &bucket{}, - rootNode: &node{isLeaf: true}, - FillPercent: DefaultFillPercent, - } - var value = bucket.write() - - // Insert into node. - key = cloneBytes(key) - c.node().put(key, key, value, 0, bucketLeafFlag) - - // Since subbuckets are not allowed on inline buckets, we need to - // dereference the inline page, if it exists. This will cause the bucket - // to be treated as a regular, non-inline bucket for the rest of the tx. - b.page = nil - - return b.Bucket(key), nil -} - -// CreateBucketIfNotExists creates a new bucket if it doesn't already exist and returns a reference to it. -// Returns an error if the bucket name is blank, or if the bucket name is too long. -// The bucket instance is only valid for the lifetime of the transaction. -func (b *Bucket) CreateBucketIfNotExists(key []byte) (*Bucket, error) { - child, err := b.CreateBucket(key) - if err == ErrBucketExists { - return b.Bucket(key), nil - } else if err != nil { - return nil, err - } - return child, nil -} - -// DeleteBucket deletes a bucket at the given key. -// Returns an error if the bucket does not exist, or if the key represents a non-bucket value. -func (b *Bucket) DeleteBucket(key []byte) error { - if b.tx.db == nil { - return ErrTxClosed - } else if !b.Writable() { - return ErrTxNotWritable - } - - // Move cursor to correct position. - c := b.Cursor() - k, _, flags := c.seek(key) - - // Return an error if bucket doesn't exist or is not a bucket. - if !bytes.Equal(key, k) { - return ErrBucketNotFound - } else if (flags & bucketLeafFlag) == 0 { - return ErrIncompatibleValue - } - - // Recursively delete all child buckets. - child := b.Bucket(key) - err := child.ForEach(func(k, v []byte) error { - if _, _, childFlags := child.Cursor().seek(k); (childFlags & bucketLeafFlag) != 0 { - if err := child.DeleteBucket(k); err != nil { - return fmt.Errorf("delete bucket: %s", err) - } - } - return nil - }) - if err != nil { - return err - } - - // Remove cached copy. - delete(b.buckets, string(key)) - - // Release all bucket pages to freelist. - child.nodes = nil - child.rootNode = nil - child.free() - - // Delete the node if we have a matching key. - c.node().del(key) - - return nil -} - -// Get retrieves the value for a key in the bucket. -// Returns a nil value if the key does not exist or if the key is a nested bucket. -// The returned value is only valid for the life of the transaction. -func (b *Bucket) Get(key []byte) []byte { - k, v, flags := b.Cursor().seek(key) - - // Return nil if this is a bucket. - if (flags & bucketLeafFlag) != 0 { - return nil - } - - // If our target node isn't the same key as what's passed in then return nil. - if !bytes.Equal(key, k) { - return nil - } - return v -} - -// Put sets the value for a key in the bucket. -// If the key exist then its previous value will be overwritten. -// Supplied value must remain valid for the life of the transaction. -// Returns an error if the bucket was created from a read-only transaction, if the key is blank, if the key is too large, or if the value is too large. -func (b *Bucket) Put(key []byte, value []byte) error { - if b.tx.db == nil { - return ErrTxClosed - } else if !b.Writable() { - return ErrTxNotWritable - } else if len(key) == 0 { - return ErrKeyRequired - } else if len(key) > MaxKeySize { - return ErrKeyTooLarge - } else if int64(len(value)) > MaxValueSize { - return ErrValueTooLarge - } - - // Move cursor to correct position. - c := b.Cursor() - k, _, flags := c.seek(key) - - // Return an error if there is an existing key with a bucket value. - if bytes.Equal(key, k) && (flags&bucketLeafFlag) != 0 { - return ErrIncompatibleValue - } - - // Insert into node. - key = cloneBytes(key) - c.node().put(key, key, value, 0, 0) - - return nil -} - -// Delete removes a key from the bucket. -// If the key does not exist then nothing is done and a nil error is returned. -// Returns an error if the bucket was created from a read-only transaction. -func (b *Bucket) Delete(key []byte) error { - if b.tx.db == nil { - return ErrTxClosed - } else if !b.Writable() { - return ErrTxNotWritable - } - - // Move cursor to correct position. - c := b.Cursor() - k, _, flags := c.seek(key) - - // Return nil if the key doesn't exist. - if !bytes.Equal(key, k) { - return nil - } - - // Return an error if there is already existing bucket value. - if (flags & bucketLeafFlag) != 0 { - return ErrIncompatibleValue - } - - // Delete the node if we have a matching key. - c.node().del(key) - - return nil -} - -// Sequence returns the current integer for the bucket without incrementing it. -func (b *Bucket) Sequence() uint64 { return b.bucket.sequence } - -// SetSequence updates the sequence number for the bucket. -func (b *Bucket) SetSequence(v uint64) error { - if b.tx.db == nil { - return ErrTxClosed - } else if !b.Writable() { - return ErrTxNotWritable - } - - // Materialize the root node if it hasn't been already so that the - // bucket will be saved during commit. - if b.rootNode == nil { - _ = b.node(b.root, nil) - } - - // Increment and return the sequence. - b.bucket.sequence = v - return nil -} - -// NextSequence returns an autoincrementing integer for the bucket. -func (b *Bucket) NextSequence() (uint64, error) { - if b.tx.db == nil { - return 0, ErrTxClosed - } else if !b.Writable() { - return 0, ErrTxNotWritable - } - - // Materialize the root node if it hasn't been already so that the - // bucket will be saved during commit. - if b.rootNode == nil { - _ = b.node(b.root, nil) - } - - // Increment and return the sequence. - b.bucket.sequence++ - return b.bucket.sequence, nil -} - -// ForEach executes a function for each key/value pair in a bucket. -// If the provided function returns an error then the iteration is stopped and -// the error is returned to the caller. The provided function must not modify -// the bucket; this will result in undefined behavior. -func (b *Bucket) ForEach(fn func(k, v []byte) error) error { - if b.tx.db == nil { - return ErrTxClosed - } - c := b.Cursor() - for k, v := c.First(); k != nil; k, v = c.Next() { - if err := fn(k, v); err != nil { - return err - } - } - return nil -} - -// Stat returns stats on a bucket. -func (b *Bucket) Stats() BucketStats { - var s, subStats BucketStats - pageSize := b.tx.db.pageSize - s.BucketN += 1 - if b.root == 0 { - s.InlineBucketN += 1 - } - b.forEachPage(func(p *page, depth int) { - if (p.flags & leafPageFlag) != 0 { - s.KeyN += int(p.count) - - // used totals the used bytes for the page - used := pageHeaderSize - - if p.count != 0 { - // If page has any elements, add all element headers. - used += leafPageElementSize * uintptr(p.count-1) - - // Add all element key, value sizes. - // The computation takes advantage of the fact that the position - // of the last element's key/value equals to the total of the sizes - // of all previous elements' keys and values. - // It also includes the last element's header. - lastElement := p.leafPageElement(p.count - 1) - used += uintptr(lastElement.pos + lastElement.ksize + lastElement.vsize) - } - - if b.root == 0 { - // For inlined bucket just update the inline stats - s.InlineBucketInuse += int(used) - } else { - // For non-inlined bucket update all the leaf stats - s.LeafPageN++ - s.LeafInuse += int(used) - s.LeafOverflowN += int(p.overflow) - - // Collect stats from sub-buckets. - // Do that by iterating over all element headers - // looking for the ones with the bucketLeafFlag. - for i := uint16(0); i < p.count; i++ { - e := p.leafPageElement(i) - if (e.flags & bucketLeafFlag) != 0 { - // For any bucket element, open the element value - // and recursively call Stats on the contained bucket. - subStats.Add(b.openBucket(e.value()).Stats()) - } - } - } - } else if (p.flags & branchPageFlag) != 0 { - s.BranchPageN++ - lastElement := p.branchPageElement(p.count - 1) - - // used totals the used bytes for the page - // Add header and all element headers. - used := pageHeaderSize + (branchPageElementSize * uintptr(p.count-1)) - - // Add size of all keys and values. - // Again, use the fact that last element's position equals to - // the total of key, value sizes of all previous elements. - used += uintptr(lastElement.pos + lastElement.ksize) - s.BranchInuse += int(used) - s.BranchOverflowN += int(p.overflow) - } - - // Keep track of maximum page depth. - if depth+1 > s.Depth { - s.Depth = (depth + 1) - } - }) - - // Alloc stats can be computed from page counts and pageSize. - s.BranchAlloc = (s.BranchPageN + s.BranchOverflowN) * pageSize - s.LeafAlloc = (s.LeafPageN + s.LeafOverflowN) * pageSize - - // Add the max depth of sub-buckets to get total nested depth. - s.Depth += subStats.Depth - // Add the stats for all sub-buckets - s.Add(subStats) - return s -} - -// forEachPage iterates over every page in a bucket, including inline pages. -func (b *Bucket) forEachPage(fn func(*page, int)) { - // If we have an inline page then just use that. - if b.page != nil { - fn(b.page, 0) - return - } - - // Otherwise traverse the page hierarchy. - b.tx.forEachPage(b.root, 0, fn) -} - -// forEachPageNode iterates over every page (or node) in a bucket. -// This also includes inline pages. -func (b *Bucket) forEachPageNode(fn func(*page, *node, int)) { - // If we have an inline page or root node then just use that. - if b.page != nil { - fn(b.page, nil, 0) - return - } - b._forEachPageNode(b.root, 0, fn) -} - -func (b *Bucket) _forEachPageNode(pgid pgid, depth int, fn func(*page, *node, int)) { - var p, n = b.pageNode(pgid) - - // Execute function. - fn(p, n, depth) - - // Recursively loop over children. - if p != nil { - if (p.flags & branchPageFlag) != 0 { - for i := 0; i < int(p.count); i++ { - elem := p.branchPageElement(uint16(i)) - b._forEachPageNode(elem.pgid, depth+1, fn) - } - } - } else { - if !n.isLeaf { - for _, inode := range n.inodes { - b._forEachPageNode(inode.pgid, depth+1, fn) - } - } - } -} - -// spill writes all the nodes for this bucket to dirty pages. -func (b *Bucket) spill() error { - // Spill all child buckets first. - for name, child := range b.buckets { - // If the child bucket is small enough and it has no child buckets then - // write it inline into the parent bucket's page. Otherwise spill it - // like a normal bucket and make the parent value a pointer to the page. - var value []byte - if child.inlineable() { - child.free() - value = child.write() - } else { - if err := child.spill(); err != nil { - return err - } - - // Update the child bucket header in this bucket. - value = make([]byte, unsafe.Sizeof(bucket{})) - var bucket = (*bucket)(unsafe.Pointer(&value[0])) - *bucket = *child.bucket - } - - // Skip writing the bucket if there are no materialized nodes. - if child.rootNode == nil { - continue - } - - // Update parent node. - var c = b.Cursor() - k, _, flags := c.seek([]byte(name)) - if !bytes.Equal([]byte(name), k) { - panic(fmt.Sprintf("misplaced bucket header: %x -> %x", []byte(name), k)) - } - if flags&bucketLeafFlag == 0 { - panic(fmt.Sprintf("unexpected bucket header flag: %x", flags)) - } - c.node().put([]byte(name), []byte(name), value, 0, bucketLeafFlag) - } - - // Ignore if there's not a materialized root node. - if b.rootNode == nil { - return nil - } - - // Spill nodes. - if err := b.rootNode.spill(); err != nil { - return err - } - b.rootNode = b.rootNode.root() - - // Update the root node for this bucket. - if b.rootNode.pgid >= b.tx.meta.pgid { - panic(fmt.Sprintf("pgid (%d) above high water mark (%d)", b.rootNode.pgid, b.tx.meta.pgid)) - } - b.root = b.rootNode.pgid - - return nil -} - -// inlineable returns true if a bucket is small enough to be written inline -// and if it contains no subbuckets. Otherwise returns false. -func (b *Bucket) inlineable() bool { - var n = b.rootNode - - // Bucket must only contain a single leaf node. - if n == nil || !n.isLeaf { - return false - } - - // Bucket is not inlineable if it contains subbuckets or if it goes beyond - // our threshold for inline bucket size. - var size = pageHeaderSize - for _, inode := range n.inodes { - size += leafPageElementSize + uintptr(len(inode.key)) + uintptr(len(inode.value)) - - if inode.flags&bucketLeafFlag != 0 { - return false - } else if size > b.maxInlineBucketSize() { - return false - } - } - - return true -} - -// Returns the maximum total size of a bucket to make it a candidate for inlining. -func (b *Bucket) maxInlineBucketSize() uintptr { - return uintptr(b.tx.db.pageSize / 4) -} - -// write allocates and writes a bucket to a byte slice. -func (b *Bucket) write() []byte { - // Allocate the appropriate size. - var n = b.rootNode - var value = make([]byte, bucketHeaderSize+n.size()) - - // Write a bucket header. - var bucket = (*bucket)(unsafe.Pointer(&value[0])) - *bucket = *b.bucket - - // Convert byte slice to a fake page and write the root node. - var p = (*page)(unsafe.Pointer(&value[bucketHeaderSize])) - n.write(p) - - return value -} - -// rebalance attempts to balance all nodes. -func (b *Bucket) rebalance() { - for _, n := range b.nodes { - n.rebalance() - } - for _, child := range b.buckets { - child.rebalance() - } -} - -// node creates a node from a page and associates it with a given parent. -func (b *Bucket) node(pgid pgid, parent *node) *node { - _assert(b.nodes != nil, "nodes map expected") - - // Retrieve node if it's already been created. - if n := b.nodes[pgid]; n != nil { - return n - } - - // Otherwise create a node and cache it. - n := &node{bucket: b, parent: parent} - if parent == nil { - b.rootNode = n - } else { - parent.children = append(parent.children, n) - } - - // Use the inline page if this is an inline bucket. - var p = b.page - if p == nil { - p = b.tx.page(pgid) - } - - // Read the page into the node and cache it. - n.read(p) - b.nodes[pgid] = n - - // Update statistics. - b.tx.stats.NodeCount++ - - return n -} - -// free recursively frees all pages in the bucket. -func (b *Bucket) free() { - if b.root == 0 { - return - } - - var tx = b.tx - b.forEachPageNode(func(p *page, n *node, _ int) { - if p != nil { - tx.db.freelist.free(tx.meta.txid, p) - } else { - n.free() - } - }) - b.root = 0 -} - -// dereference removes all references to the old mmap. -func (b *Bucket) dereference() { - if b.rootNode != nil { - b.rootNode.root().dereference() - } - - for _, child := range b.buckets { - child.dereference() - } -} - -// pageNode returns the in-memory node, if it exists. -// Otherwise returns the underlying page. -func (b *Bucket) pageNode(id pgid) (*page, *node) { - // Inline buckets have a fake page embedded in their value so treat them - // differently. We'll return the rootNode (if available) or the fake page. - if b.root == 0 { - if id != 0 { - panic(fmt.Sprintf("inline bucket non-zero page access(2): %d != 0", id)) - } - if b.rootNode != nil { - return nil, b.rootNode - } - return b.page, nil - } - - // Check the node cache for non-inline buckets. - if b.nodes != nil { - if n := b.nodes[id]; n != nil { - return nil, n - } - } - - // Finally lookup the page from the transaction if no node is materialized. - return b.tx.page(id), nil -} - -// BucketStats records statistics about resources used by a bucket. -type BucketStats struct { - // Page count statistics. - BranchPageN int // number of logical branch pages - BranchOverflowN int // number of physical branch overflow pages - LeafPageN int // number of logical leaf pages - LeafOverflowN int // number of physical leaf overflow pages - - // Tree statistics. - KeyN int // number of keys/value pairs - Depth int // number of levels in B+tree - - // Page size utilization. - BranchAlloc int // bytes allocated for physical branch pages - BranchInuse int // bytes actually used for branch data - LeafAlloc int // bytes allocated for physical leaf pages - LeafInuse int // bytes actually used for leaf data - - // Bucket statistics - BucketN int // total number of buckets including the top bucket - InlineBucketN int // total number on inlined buckets - InlineBucketInuse int // bytes used for inlined buckets (also accounted for in LeafInuse) -} - -func (s *BucketStats) Add(other BucketStats) { - s.BranchPageN += other.BranchPageN - s.BranchOverflowN += other.BranchOverflowN - s.LeafPageN += other.LeafPageN - s.LeafOverflowN += other.LeafOverflowN - s.KeyN += other.KeyN - if s.Depth < other.Depth { - s.Depth = other.Depth - } - s.BranchAlloc += other.BranchAlloc - s.BranchInuse += other.BranchInuse - s.LeafAlloc += other.LeafAlloc - s.LeafInuse += other.LeafInuse - - s.BucketN += other.BucketN - s.InlineBucketN += other.InlineBucketN - s.InlineBucketInuse += other.InlineBucketInuse -} - -// cloneBytes returns a copy of a given slice. -func cloneBytes(v []byte) []byte { - var clone = make([]byte, len(v)) - copy(clone, v) - return clone -} diff --git a/vendor/go.etcd.io/bbolt/compact.go b/vendor/go.etcd.io/bbolt/compact.go deleted file mode 100644 index e4fe91b0..00000000 --- a/vendor/go.etcd.io/bbolt/compact.go +++ /dev/null @@ -1,114 +0,0 @@ -package bbolt - -// Compact will create a copy of the source DB and in the destination DB. This may -// reclaim space that the source database no longer has use for. txMaxSize can be -// used to limit the transactions size of this process and may trigger intermittent -// commits. A value of zero will ignore transaction sizes. -// TODO: merge with: https://github.com/etcd-io/etcd/blob/b7f0f52a16dbf83f18ca1d803f7892d750366a94/mvcc/backend/backend.go#L349 -func Compact(dst, src *DB, txMaxSize int64) error { - // commit regularly, or we'll run out of memory for large datasets if using one transaction. - var size int64 - tx, err := dst.Begin(true) - if err != nil { - return err - } - defer tx.Rollback() - - if err := walk(src, func(keys [][]byte, k, v []byte, seq uint64) error { - // On each key/value, check if we have exceeded tx size. - sz := int64(len(k) + len(v)) - if size+sz > txMaxSize && txMaxSize != 0 { - // Commit previous transaction. - if err := tx.Commit(); err != nil { - return err - } - - // Start new transaction. - tx, err = dst.Begin(true) - if err != nil { - return err - } - size = 0 - } - size += sz - - // Create bucket on the root transaction if this is the first level. - nk := len(keys) - if nk == 0 { - bkt, err := tx.CreateBucket(k) - if err != nil { - return err - } - if err := bkt.SetSequence(seq); err != nil { - return err - } - return nil - } - - // Create buckets on subsequent levels, if necessary. - b := tx.Bucket(keys[0]) - if nk > 1 { - for _, k := range keys[1:] { - b = b.Bucket(k) - } - } - - // Fill the entire page for best compaction. - b.FillPercent = 1.0 - - // If there is no value then this is a bucket call. - if v == nil { - bkt, err := b.CreateBucket(k) - if err != nil { - return err - } - if err := bkt.SetSequence(seq); err != nil { - return err - } - return nil - } - - // Otherwise treat it as a key/value pair. - return b.Put(k, v) - }); err != nil { - return err - } - - return tx.Commit() -} - -// walkFunc is the type of the function called for keys (buckets and "normal" -// values) discovered by Walk. keys is the list of keys to descend to the bucket -// owning the discovered key/value pair k/v. -type walkFunc func(keys [][]byte, k, v []byte, seq uint64) error - -// walk walks recursively the bolt database db, calling walkFn for each key it finds. -func walk(db *DB, walkFn walkFunc) error { - return db.View(func(tx *Tx) error { - return tx.ForEach(func(name []byte, b *Bucket) error { - return walkBucket(b, nil, name, nil, b.Sequence(), walkFn) - }) - }) -} - -func walkBucket(b *Bucket, keypath [][]byte, k, v []byte, seq uint64, fn walkFunc) error { - // Execute callback. - if err := fn(keypath, k, v, seq); err != nil { - return err - } - - // If this is not a bucket then stop. - if v != nil { - return nil - } - - // Iterate over each child key/value. - keypath = append(keypath, k) - return b.ForEach(func(k, v []byte) error { - if v == nil { - bkt := b.Bucket(k) - return walkBucket(bkt, keypath, k, nil, bkt.Sequence(), fn) - } - return walkBucket(b, keypath, k, v, b.Sequence(), fn) - }) -} diff --git a/vendor/go.etcd.io/bbolt/cursor.go b/vendor/go.etcd.io/bbolt/cursor.go deleted file mode 100644 index 98aeb449..00000000 --- a/vendor/go.etcd.io/bbolt/cursor.go +++ /dev/null @@ -1,396 +0,0 @@ -package bbolt - -import ( - "bytes" - "fmt" - "sort" -) - -// Cursor represents an iterator that can traverse over all key/value pairs in a bucket in sorted order. -// Cursors see nested buckets with value == nil. -// Cursors can be obtained from a transaction and are valid as long as the transaction is open. -// -// Keys and values returned from the cursor are only valid for the life of the transaction. -// -// Changing data while traversing with a cursor may cause it to be invalidated -// and return unexpected keys and/or values. You must reposition your cursor -// after mutating data. -type Cursor struct { - bucket *Bucket - stack []elemRef -} - -// Bucket returns the bucket that this cursor was created from. -func (c *Cursor) Bucket() *Bucket { - return c.bucket -} - -// First moves the cursor to the first item in the bucket and returns its key and value. -// If the bucket is empty then a nil key and value are returned. -// The returned key and value are only valid for the life of the transaction. -func (c *Cursor) First() (key []byte, value []byte) { - _assert(c.bucket.tx.db != nil, "tx closed") - c.stack = c.stack[:0] - p, n := c.bucket.pageNode(c.bucket.root) - c.stack = append(c.stack, elemRef{page: p, node: n, index: 0}) - c.first() - - // If we land on an empty page then move to the next value. - // https://github.com/boltdb/bolt/issues/450 - if c.stack[len(c.stack)-1].count() == 0 { - c.next() - } - - k, v, flags := c.keyValue() - if (flags & uint32(bucketLeafFlag)) != 0 { - return k, nil - } - return k, v - -} - -// Last moves the cursor to the last item in the bucket and returns its key and value. -// If the bucket is empty then a nil key and value are returned. -// The returned key and value are only valid for the life of the transaction. -func (c *Cursor) Last() (key []byte, value []byte) { - _assert(c.bucket.tx.db != nil, "tx closed") - c.stack = c.stack[:0] - p, n := c.bucket.pageNode(c.bucket.root) - ref := elemRef{page: p, node: n} - ref.index = ref.count() - 1 - c.stack = append(c.stack, ref) - c.last() - k, v, flags := c.keyValue() - if (flags & uint32(bucketLeafFlag)) != 0 { - return k, nil - } - return k, v -} - -// Next moves the cursor to the next item in the bucket and returns its key and value. -// If the cursor is at the end of the bucket then a nil key and value are returned. -// The returned key and value are only valid for the life of the transaction. -func (c *Cursor) Next() (key []byte, value []byte) { - _assert(c.bucket.tx.db != nil, "tx closed") - k, v, flags := c.next() - if (flags & uint32(bucketLeafFlag)) != 0 { - return k, nil - } - return k, v -} - -// Prev moves the cursor to the previous item in the bucket and returns its key and value. -// If the cursor is at the beginning of the bucket then a nil key and value are returned. -// The returned key and value are only valid for the life of the transaction. -func (c *Cursor) Prev() (key []byte, value []byte) { - _assert(c.bucket.tx.db != nil, "tx closed") - - // Attempt to move back one element until we're successful. - // Move up the stack as we hit the beginning of each page in our stack. - for i := len(c.stack) - 1; i >= 0; i-- { - elem := &c.stack[i] - if elem.index > 0 { - elem.index-- - break - } - c.stack = c.stack[:i] - } - - // If we've hit the end then return nil. - if len(c.stack) == 0 { - return nil, nil - } - - // Move down the stack to find the last element of the last leaf under this branch. - c.last() - k, v, flags := c.keyValue() - if (flags & uint32(bucketLeafFlag)) != 0 { - return k, nil - } - return k, v -} - -// Seek moves the cursor to a given key and returns it. -// If the key does not exist then the next key is used. If no keys -// follow, a nil key is returned. -// The returned key and value are only valid for the life of the transaction. -func (c *Cursor) Seek(seek []byte) (key []byte, value []byte) { - k, v, flags := c.seek(seek) - - // If we ended up after the last element of a page then move to the next one. - if ref := &c.stack[len(c.stack)-1]; ref.index >= ref.count() { - k, v, flags = c.next() - } - - if k == nil { - return nil, nil - } else if (flags & uint32(bucketLeafFlag)) != 0 { - return k, nil - } - return k, v -} - -// Delete removes the current key/value under the cursor from the bucket. -// Delete fails if current key/value is a bucket or if the transaction is not writable. -func (c *Cursor) Delete() error { - if c.bucket.tx.db == nil { - return ErrTxClosed - } else if !c.bucket.Writable() { - return ErrTxNotWritable - } - - key, _, flags := c.keyValue() - // Return an error if current value is a bucket. - if (flags & bucketLeafFlag) != 0 { - return ErrIncompatibleValue - } - c.node().del(key) - - return nil -} - -// seek moves the cursor to a given key and returns it. -// If the key does not exist then the next key is used. -func (c *Cursor) seek(seek []byte) (key []byte, value []byte, flags uint32) { - _assert(c.bucket.tx.db != nil, "tx closed") - - // Start from root page/node and traverse to correct page. - c.stack = c.stack[:0] - c.search(seek, c.bucket.root) - - // If this is a bucket then return a nil value. - return c.keyValue() -} - -// first moves the cursor to the first leaf element under the last page in the stack. -func (c *Cursor) first() { - for { - // Exit when we hit a leaf page. - var ref = &c.stack[len(c.stack)-1] - if ref.isLeaf() { - break - } - - // Keep adding pages pointing to the first element to the stack. - var pgid pgid - if ref.node != nil { - pgid = ref.node.inodes[ref.index].pgid - } else { - pgid = ref.page.branchPageElement(uint16(ref.index)).pgid - } - p, n := c.bucket.pageNode(pgid) - c.stack = append(c.stack, elemRef{page: p, node: n, index: 0}) - } -} - -// last moves the cursor to the last leaf element under the last page in the stack. -func (c *Cursor) last() { - for { - // Exit when we hit a leaf page. - ref := &c.stack[len(c.stack)-1] - if ref.isLeaf() { - break - } - - // Keep adding pages pointing to the last element in the stack. - var pgid pgid - if ref.node != nil { - pgid = ref.node.inodes[ref.index].pgid - } else { - pgid = ref.page.branchPageElement(uint16(ref.index)).pgid - } - p, n := c.bucket.pageNode(pgid) - - var nextRef = elemRef{page: p, node: n} - nextRef.index = nextRef.count() - 1 - c.stack = append(c.stack, nextRef) - } -} - -// next moves to the next leaf element and returns the key and value. -// If the cursor is at the last leaf element then it stays there and returns nil. -func (c *Cursor) next() (key []byte, value []byte, flags uint32) { - for { - // Attempt to move over one element until we're successful. - // Move up the stack as we hit the end of each page in our stack. - var i int - for i = len(c.stack) - 1; i >= 0; i-- { - elem := &c.stack[i] - if elem.index < elem.count()-1 { - elem.index++ - break - } - } - - // If we've hit the root page then stop and return. This will leave the - // cursor on the last element of the last page. - if i == -1 { - return nil, nil, 0 - } - - // Otherwise start from where we left off in the stack and find the - // first element of the first leaf page. - c.stack = c.stack[:i+1] - c.first() - - // If this is an empty page then restart and move back up the stack. - // https://github.com/boltdb/bolt/issues/450 - if c.stack[len(c.stack)-1].count() == 0 { - continue - } - - return c.keyValue() - } -} - -// search recursively performs a binary search against a given page/node until it finds a given key. -func (c *Cursor) search(key []byte, pgid pgid) { - p, n := c.bucket.pageNode(pgid) - if p != nil && (p.flags&(branchPageFlag|leafPageFlag)) == 0 { - panic(fmt.Sprintf("invalid page type: %d: %x", p.id, p.flags)) - } - e := elemRef{page: p, node: n} - c.stack = append(c.stack, e) - - // If we're on a leaf page/node then find the specific node. - if e.isLeaf() { - c.nsearch(key) - return - } - - if n != nil { - c.searchNode(key, n) - return - } - c.searchPage(key, p) -} - -func (c *Cursor) searchNode(key []byte, n *node) { - var exact bool - index := sort.Search(len(n.inodes), func(i int) bool { - // TODO(benbjohnson): Optimize this range search. It's a bit hacky right now. - // sort.Search() finds the lowest index where f() != -1 but we need the highest index. - ret := bytes.Compare(n.inodes[i].key, key) - if ret == 0 { - exact = true - } - return ret != -1 - }) - if !exact && index > 0 { - index-- - } - c.stack[len(c.stack)-1].index = index - - // Recursively search to the next page. - c.search(key, n.inodes[index].pgid) -} - -func (c *Cursor) searchPage(key []byte, p *page) { - // Binary search for the correct range. - inodes := p.branchPageElements() - - var exact bool - index := sort.Search(int(p.count), func(i int) bool { - // TODO(benbjohnson): Optimize this range search. It's a bit hacky right now. - // sort.Search() finds the lowest index where f() != -1 but we need the highest index. - ret := bytes.Compare(inodes[i].key(), key) - if ret == 0 { - exact = true - } - return ret != -1 - }) - if !exact && index > 0 { - index-- - } - c.stack[len(c.stack)-1].index = index - - // Recursively search to the next page. - c.search(key, inodes[index].pgid) -} - -// nsearch searches the leaf node on the top of the stack for a key. -func (c *Cursor) nsearch(key []byte) { - e := &c.stack[len(c.stack)-1] - p, n := e.page, e.node - - // If we have a node then search its inodes. - if n != nil { - index := sort.Search(len(n.inodes), func(i int) bool { - return bytes.Compare(n.inodes[i].key, key) != -1 - }) - e.index = index - return - } - - // If we have a page then search its leaf elements. - inodes := p.leafPageElements() - index := sort.Search(int(p.count), func(i int) bool { - return bytes.Compare(inodes[i].key(), key) != -1 - }) - e.index = index -} - -// keyValue returns the key and value of the current leaf element. -func (c *Cursor) keyValue() ([]byte, []byte, uint32) { - ref := &c.stack[len(c.stack)-1] - - // If the cursor is pointing to the end of page/node then return nil. - if ref.count() == 0 || ref.index >= ref.count() { - return nil, nil, 0 - } - - // Retrieve value from node. - if ref.node != nil { - inode := &ref.node.inodes[ref.index] - return inode.key, inode.value, inode.flags - } - - // Or retrieve value from page. - elem := ref.page.leafPageElement(uint16(ref.index)) - return elem.key(), elem.value(), elem.flags -} - -// node returns the node that the cursor is currently positioned on. -func (c *Cursor) node() *node { - _assert(len(c.stack) > 0, "accessing a node with a zero-length cursor stack") - - // If the top of the stack is a leaf node then just return it. - if ref := &c.stack[len(c.stack)-1]; ref.node != nil && ref.isLeaf() { - return ref.node - } - - // Start from root and traverse down the hierarchy. - var n = c.stack[0].node - if n == nil { - n = c.bucket.node(c.stack[0].page.id, nil) - } - for _, ref := range c.stack[:len(c.stack)-1] { - _assert(!n.isLeaf, "expected branch node") - n = n.childAt(ref.index) - } - _assert(n.isLeaf, "expected leaf node") - return n -} - -// elemRef represents a reference to an element on a given page/node. -type elemRef struct { - page *page - node *node - index int -} - -// isLeaf returns whether the ref is pointing at a leaf page/node. -func (r *elemRef) isLeaf() bool { - if r.node != nil { - return r.node.isLeaf - } - return (r.page.flags & leafPageFlag) != 0 -} - -// count returns the number of inodes or page elements. -func (r *elemRef) count() int { - if r.node != nil { - return len(r.node.inodes) - } - return int(r.page.count) -} diff --git a/vendor/go.etcd.io/bbolt/db.go b/vendor/go.etcd.io/bbolt/db.go deleted file mode 100644 index a798c390..00000000 --- a/vendor/go.etcd.io/bbolt/db.go +++ /dev/null @@ -1,1232 +0,0 @@ -package bbolt - -import ( - "errors" - "fmt" - "hash/fnv" - "log" - "os" - "runtime" - "sort" - "sync" - "time" - "unsafe" -) - -// The largest step that can be taken when remapping the mmap. -const maxMmapStep = 1 << 30 // 1GB - -// The data file format version. -const version = 2 - -// Represents a marker value to indicate that a file is a Bolt DB. -const magic uint32 = 0xED0CDAED - -const pgidNoFreelist pgid = 0xffffffffffffffff - -// IgnoreNoSync specifies whether the NoSync field of a DB is ignored when -// syncing changes to a file. This is required as some operating systems, -// such as OpenBSD, do not have a unified buffer cache (UBC) and writes -// must be synchronized using the msync(2) syscall. -const IgnoreNoSync = runtime.GOOS == "openbsd" - -// Default values if not set in a DB instance. -const ( - DefaultMaxBatchSize int = 1000 - DefaultMaxBatchDelay = 10 * time.Millisecond - DefaultAllocSize = 16 * 1024 * 1024 -) - -// default page size for db is set to the OS page size. -var defaultPageSize = os.Getpagesize() - -// The time elapsed between consecutive file locking attempts. -const flockRetryTimeout = 50 * time.Millisecond - -// FreelistType is the type of the freelist backend -type FreelistType string - -const ( - // FreelistArrayType indicates backend freelist type is array - FreelistArrayType = FreelistType("array") - // FreelistMapType indicates backend freelist type is hashmap - FreelistMapType = FreelistType("hashmap") -) - -// DB represents a collection of buckets persisted to a file on disk. -// All data access is performed through transactions which can be obtained through the DB. -// All the functions on DB will return a ErrDatabaseNotOpen if accessed before Open() is called. -type DB struct { - // When enabled, the database will perform a Check() after every commit. - // A panic is issued if the database is in an inconsistent state. This - // flag has a large performance impact so it should only be used for - // debugging purposes. - StrictMode bool - - // Setting the NoSync flag will cause the database to skip fsync() - // calls after each commit. This can be useful when bulk loading data - // into a database and you can restart the bulk load in the event of - // a system failure or database corruption. Do not set this flag for - // normal use. - // - // If the package global IgnoreNoSync constant is true, this value is - // ignored. See the comment on that constant for more details. - // - // THIS IS UNSAFE. PLEASE USE WITH CAUTION. - NoSync bool - - // When true, skips syncing freelist to disk. This improves the database - // write performance under normal operation, but requires a full database - // re-sync during recovery. - NoFreelistSync bool - - // FreelistType sets the backend freelist type. There are two options. Array which is simple but endures - // dramatic performance degradation if database is large and framentation in freelist is common. - // The alternative one is using hashmap, it is faster in almost all circumstances - // but it doesn't guarantee that it offers the smallest page id available. In normal case it is safe. - // The default type is array - FreelistType FreelistType - - // When true, skips the truncate call when growing the database. - // Setting this to true is only safe on non-ext3/ext4 systems. - // Skipping truncation avoids preallocation of hard drive space and - // bypasses a truncate() and fsync() syscall on remapping. - // - // https://github.com/boltdb/bolt/issues/284 - NoGrowSync bool - - // If you want to read the entire database fast, you can set MmapFlag to - // syscall.MAP_POPULATE on Linux 2.6.23+ for sequential read-ahead. - MmapFlags int - - // MaxBatchSize is the maximum size of a batch. Default value is - // copied from DefaultMaxBatchSize in Open. - // - // If <=0, disables batching. - // - // Do not change concurrently with calls to Batch. - MaxBatchSize int - - // MaxBatchDelay is the maximum delay before a batch starts. - // Default value is copied from DefaultMaxBatchDelay in Open. - // - // If <=0, effectively disables batching. - // - // Do not change concurrently with calls to Batch. - MaxBatchDelay time.Duration - - // AllocSize is the amount of space allocated when the database - // needs to create new pages. This is done to amortize the cost - // of truncate() and fsync() when growing the data file. - AllocSize int - - // Mlock locks database file in memory when set to true. - // It prevents major page faults, however used memory can't be reclaimed. - // - // Supported only on Unix via mlock/munlock syscalls. - Mlock bool - - path string - openFile func(string, int, os.FileMode) (*os.File, error) - file *os.File - dataref []byte // mmap'ed readonly, write throws SEGV - data *[maxMapSize]byte - datasz int - filesz int // current on disk file size - meta0 *meta - meta1 *meta - pageSize int - opened bool - rwtx *Tx - txs []*Tx - stats Stats - - freelist *freelist - freelistLoad sync.Once - - pagePool sync.Pool - - batchMu sync.Mutex - batch *batch - - rwlock sync.Mutex // Allows only one writer at a time. - metalock sync.Mutex // Protects meta page access. - mmaplock sync.RWMutex // Protects mmap access during remapping. - statlock sync.RWMutex // Protects stats access. - - ops struct { - writeAt func(b []byte, off int64) (n int, err error) - } - - // Read only mode. - // When true, Update() and Begin(true) return ErrDatabaseReadOnly immediately. - readOnly bool -} - -// Path returns the path to currently open database file. -func (db *DB) Path() string { - return db.path -} - -// GoString returns the Go string representation of the database. -func (db *DB) GoString() string { - return fmt.Sprintf("bolt.DB{path:%q}", db.path) -} - -// String returns the string representation of the database. -func (db *DB) String() string { - return fmt.Sprintf("DB<%q>", db.path) -} - -// Open creates and opens a database at the given path. -// If the file does not exist then it will be created automatically. -// Passing in nil options will cause Bolt to open the database with the default options. -func Open(path string, mode os.FileMode, options *Options) (*DB, error) { - db := &DB{ - opened: true, - } - // Set default options if no options are provided. - if options == nil { - options = DefaultOptions - } - db.NoSync = options.NoSync - db.NoGrowSync = options.NoGrowSync - db.MmapFlags = options.MmapFlags - db.NoFreelistSync = options.NoFreelistSync - db.FreelistType = options.FreelistType - db.Mlock = options.Mlock - - // Set default values for later DB operations. - db.MaxBatchSize = DefaultMaxBatchSize - db.MaxBatchDelay = DefaultMaxBatchDelay - db.AllocSize = DefaultAllocSize - - flag := os.O_RDWR - if options.ReadOnly { - flag = os.O_RDONLY - db.readOnly = true - } - - db.openFile = options.OpenFile - if db.openFile == nil { - db.openFile = os.OpenFile - } - - // Open data file and separate sync handler for metadata writes. - var err error - if db.file, err = db.openFile(path, flag|os.O_CREATE, mode); err != nil { - _ = db.close() - return nil, err - } - db.path = db.file.Name() - - // Lock file so that other processes using Bolt in read-write mode cannot - // use the database at the same time. This would cause corruption since - // the two processes would write meta pages and free pages separately. - // The database file is locked exclusively (only one process can grab the lock) - // if !options.ReadOnly. - // The database file is locked using the shared lock (more than one process may - // hold a lock at the same time) otherwise (options.ReadOnly is set). - if err := flock(db, !db.readOnly, options.Timeout); err != nil { - _ = db.close() - return nil, err - } - - // Default values for test hooks - db.ops.writeAt = db.file.WriteAt - - if db.pageSize = options.PageSize; db.pageSize == 0 { - // Set the default page size to the OS page size. - db.pageSize = defaultPageSize - } - - // Initialize the database if it doesn't exist. - if info, err := db.file.Stat(); err != nil { - _ = db.close() - return nil, err - } else if info.Size() == 0 { - // Initialize new files with meta pages. - if err := db.init(); err != nil { - // clean up file descriptor on initialization fail - _ = db.close() - return nil, err - } - } else { - // Read the first meta page to determine the page size. - var buf [0x1000]byte - // If we can't read the page size, but can read a page, assume - // it's the same as the OS or one given -- since that's how the - // page size was chosen in the first place. - // - // If the first page is invalid and this OS uses a different - // page size than what the database was created with then we - // are out of luck and cannot access the database. - // - // TODO: scan for next page - if bw, err := db.file.ReadAt(buf[:], 0); err == nil && bw == len(buf) { - if m := db.pageInBuffer(buf[:], 0).meta(); m.validate() == nil { - db.pageSize = int(m.pageSize) - } - } else { - _ = db.close() - return nil, ErrInvalid - } - } - - // Initialize page pool. - db.pagePool = sync.Pool{ - New: func() interface{} { - return make([]byte, db.pageSize) - }, - } - - // Memory map the data file. - if err := db.mmap(options.InitialMmapSize); err != nil { - _ = db.close() - return nil, err - } - - if db.readOnly { - return db, nil - } - - db.loadFreelist() - - // Flush freelist when transitioning from no sync to sync so - // NoFreelistSync unaware boltdb can open the db later. - if !db.NoFreelistSync && !db.hasSyncedFreelist() { - tx, err := db.Begin(true) - if tx != nil { - err = tx.Commit() - } - if err != nil { - _ = db.close() - return nil, err - } - } - - // Mark the database as opened and return. - return db, nil -} - -// loadFreelist reads the freelist if it is synced, or reconstructs it -// by scanning the DB if it is not synced. It assumes there are no -// concurrent accesses being made to the freelist. -func (db *DB) loadFreelist() { - db.freelistLoad.Do(func() { - db.freelist = newFreelist(db.FreelistType) - if !db.hasSyncedFreelist() { - // Reconstruct free list by scanning the DB. - db.freelist.readIDs(db.freepages()) - } else { - // Read free list from freelist page. - db.freelist.read(db.page(db.meta().freelist)) - } - db.stats.FreePageN = db.freelist.free_count() - }) -} - -func (db *DB) hasSyncedFreelist() bool { - return db.meta().freelist != pgidNoFreelist -} - -// mmap opens the underlying memory-mapped file and initializes the meta references. -// minsz is the minimum size that the new mmap can be. -func (db *DB) mmap(minsz int) error { - db.mmaplock.Lock() - defer db.mmaplock.Unlock() - - info, err := db.file.Stat() - if err != nil { - return fmt.Errorf("mmap stat error: %s", err) - } else if int(info.Size()) < db.pageSize*2 { - return fmt.Errorf("file size too small") - } - - // Ensure the size is at least the minimum size. - fileSize := int(info.Size()) - var size = fileSize - if size < minsz { - size = minsz - } - size, err = db.mmapSize(size) - if err != nil { - return err - } - - if db.Mlock { - // Unlock db memory - if err := db.munlock(fileSize); err != nil { - return err - } - } - - // Dereference all mmap references before unmapping. - if db.rwtx != nil { - db.rwtx.root.dereference() - } - - // Unmap existing data before continuing. - if err := db.munmap(); err != nil { - return err - } - - // Memory-map the data file as a byte slice. - if err := mmap(db, size); err != nil { - return err - } - - if db.Mlock { - // Don't allow swapping of data file - if err := db.mlock(fileSize); err != nil { - return err - } - } - - // Save references to the meta pages. - db.meta0 = db.page(0).meta() - db.meta1 = db.page(1).meta() - - // Validate the meta pages. We only return an error if both meta pages fail - // validation, since meta0 failing validation means that it wasn't saved - // properly -- but we can recover using meta1. And vice-versa. - err0 := db.meta0.validate() - err1 := db.meta1.validate() - if err0 != nil && err1 != nil { - return err0 - } - - return nil -} - -// munmap unmaps the data file from memory. -func (db *DB) munmap() error { - if err := munmap(db); err != nil { - return fmt.Errorf("unmap error: " + err.Error()) - } - return nil -} - -// mmapSize determines the appropriate size for the mmap given the current size -// of the database. The minimum size is 32KB and doubles until it reaches 1GB. -// Returns an error if the new mmap size is greater than the max allowed. -func (db *DB) mmapSize(size int) (int, error) { - // Double the size from 32KB until 1GB. - for i := uint(15); i <= 30; i++ { - if size <= 1< maxMapSize { - return 0, fmt.Errorf("mmap too large") - } - - // If larger than 1GB then grow by 1GB at a time. - sz := int64(size) - if remainder := sz % int64(maxMmapStep); remainder > 0 { - sz += int64(maxMmapStep) - remainder - } - - // Ensure that the mmap size is a multiple of the page size. - // This should always be true since we're incrementing in MBs. - pageSize := int64(db.pageSize) - if (sz % pageSize) != 0 { - sz = ((sz / pageSize) + 1) * pageSize - } - - // If we've exceeded the max size then only grow up to the max size. - if sz > maxMapSize { - sz = maxMapSize - } - - return int(sz), nil -} - -func (db *DB) munlock(fileSize int) error { - if err := munlock(db, fileSize); err != nil { - return fmt.Errorf("munlock error: " + err.Error()) - } - return nil -} - -func (db *DB) mlock(fileSize int) error { - if err := mlock(db, fileSize); err != nil { - return fmt.Errorf("mlock error: " + err.Error()) - } - return nil -} - -func (db *DB) mrelock(fileSizeFrom, fileSizeTo int) error { - if err := db.munlock(fileSizeFrom); err != nil { - return err - } - if err := db.mlock(fileSizeTo); err != nil { - return err - } - return nil -} - -// init creates a new database file and initializes its meta pages. -func (db *DB) init() error { - // Create two meta pages on a buffer. - buf := make([]byte, db.pageSize*4) - for i := 0; i < 2; i++ { - p := db.pageInBuffer(buf, pgid(i)) - p.id = pgid(i) - p.flags = metaPageFlag - - // Initialize the meta page. - m := p.meta() - m.magic = magic - m.version = version - m.pageSize = uint32(db.pageSize) - m.freelist = 2 - m.root = bucket{root: 3} - m.pgid = 4 - m.txid = txid(i) - m.checksum = m.sum64() - } - - // Write an empty freelist at page 3. - p := db.pageInBuffer(buf, pgid(2)) - p.id = pgid(2) - p.flags = freelistPageFlag - p.count = 0 - - // Write an empty leaf page at page 4. - p = db.pageInBuffer(buf, pgid(3)) - p.id = pgid(3) - p.flags = leafPageFlag - p.count = 0 - - // Write the buffer to our data file. - if _, err := db.ops.writeAt(buf, 0); err != nil { - return err - } - if err := fdatasync(db); err != nil { - return err - } - db.filesz = len(buf) - - return nil -} - -// Close releases all database resources. -// It will block waiting for any open transactions to finish -// before closing the database and returning. -func (db *DB) Close() error { - db.rwlock.Lock() - defer db.rwlock.Unlock() - - db.metalock.Lock() - defer db.metalock.Unlock() - - db.mmaplock.Lock() - defer db.mmaplock.Unlock() - - return db.close() -} - -func (db *DB) close() error { - if !db.opened { - return nil - } - - db.opened = false - - db.freelist = nil - - // Clear ops. - db.ops.writeAt = nil - - // Close the mmap. - if err := db.munmap(); err != nil { - return err - } - - // Close file handles. - if db.file != nil { - // No need to unlock read-only file. - if !db.readOnly { - // Unlock the file. - if err := funlock(db); err != nil { - log.Printf("bolt.Close(): funlock error: %s", err) - } - } - - // Close the file descriptor. - if err := db.file.Close(); err != nil { - return fmt.Errorf("db file close: %s", err) - } - db.file = nil - } - - db.path = "" - return nil -} - -// Begin starts a new transaction. -// Multiple read-only transactions can be used concurrently but only one -// write transaction can be used at a time. Starting multiple write transactions -// will cause the calls to block and be serialized until the current write -// transaction finishes. -// -// Transactions should not be dependent on one another. Opening a read -// transaction and a write transaction in the same goroutine can cause the -// writer to deadlock because the database periodically needs to re-mmap itself -// as it grows and it cannot do that while a read transaction is open. -// -// If a long running read transaction (for example, a snapshot transaction) is -// needed, you might want to set DB.InitialMmapSize to a large enough value -// to avoid potential blocking of write transaction. -// -// IMPORTANT: You must close read-only transactions after you are finished or -// else the database will not reclaim old pages. -func (db *DB) Begin(writable bool) (*Tx, error) { - if writable { - return db.beginRWTx() - } - return db.beginTx() -} - -func (db *DB) beginTx() (*Tx, error) { - // Lock the meta pages while we initialize the transaction. We obtain - // the meta lock before the mmap lock because that's the order that the - // write transaction will obtain them. - db.metalock.Lock() - - // Obtain a read-only lock on the mmap. When the mmap is remapped it will - // obtain a write lock so all transactions must finish before it can be - // remapped. - db.mmaplock.RLock() - - // Exit if the database is not open yet. - if !db.opened { - db.mmaplock.RUnlock() - db.metalock.Unlock() - return nil, ErrDatabaseNotOpen - } - - // Create a transaction associated with the database. - t := &Tx{} - t.init(db) - - // Keep track of transaction until it closes. - db.txs = append(db.txs, t) - n := len(db.txs) - - // Unlock the meta pages. - db.metalock.Unlock() - - // Update the transaction stats. - db.statlock.Lock() - db.stats.TxN++ - db.stats.OpenTxN = n - db.statlock.Unlock() - - return t, nil -} - -func (db *DB) beginRWTx() (*Tx, error) { - // If the database was opened with Options.ReadOnly, return an error. - if db.readOnly { - return nil, ErrDatabaseReadOnly - } - - // Obtain writer lock. This is released by the transaction when it closes. - // This enforces only one writer transaction at a time. - db.rwlock.Lock() - - // Once we have the writer lock then we can lock the meta pages so that - // we can set up the transaction. - db.metalock.Lock() - defer db.metalock.Unlock() - - // Exit if the database is not open yet. - if !db.opened { - db.rwlock.Unlock() - return nil, ErrDatabaseNotOpen - } - - // Create a transaction associated with the database. - t := &Tx{writable: true} - t.init(db) - db.rwtx = t - db.freePages() - return t, nil -} - -// freePages releases any pages associated with closed read-only transactions. -func (db *DB) freePages() { - // Free all pending pages prior to earliest open transaction. - sort.Sort(txsById(db.txs)) - minid := txid(0xFFFFFFFFFFFFFFFF) - if len(db.txs) > 0 { - minid = db.txs[0].meta.txid - } - if minid > 0 { - db.freelist.release(minid - 1) - } - // Release unused txid extents. - for _, t := range db.txs { - db.freelist.releaseRange(minid, t.meta.txid-1) - minid = t.meta.txid + 1 - } - db.freelist.releaseRange(minid, txid(0xFFFFFFFFFFFFFFFF)) - // Any page both allocated and freed in an extent is safe to release. -} - -type txsById []*Tx - -func (t txsById) Len() int { return len(t) } -func (t txsById) Swap(i, j int) { t[i], t[j] = t[j], t[i] } -func (t txsById) Less(i, j int) bool { return t[i].meta.txid < t[j].meta.txid } - -// removeTx removes a transaction from the database. -func (db *DB) removeTx(tx *Tx) { - // Release the read lock on the mmap. - db.mmaplock.RUnlock() - - // Use the meta lock to restrict access to the DB object. - db.metalock.Lock() - - // Remove the transaction. - for i, t := range db.txs { - if t == tx { - last := len(db.txs) - 1 - db.txs[i] = db.txs[last] - db.txs[last] = nil - db.txs = db.txs[:last] - break - } - } - n := len(db.txs) - - // Unlock the meta pages. - db.metalock.Unlock() - - // Merge statistics. - db.statlock.Lock() - db.stats.OpenTxN = n - db.stats.TxStats.add(&tx.stats) - db.statlock.Unlock() -} - -// Update executes a function within the context of a read-write managed transaction. -// If no error is returned from the function then the transaction is committed. -// If an error is returned then the entire transaction is rolled back. -// Any error that is returned from the function or returned from the commit is -// returned from the Update() method. -// -// Attempting to manually commit or rollback within the function will cause a panic. -func (db *DB) Update(fn func(*Tx) error) error { - t, err := db.Begin(true) - if err != nil { - return err - } - - // Make sure the transaction rolls back in the event of a panic. - defer func() { - if t.db != nil { - t.rollback() - } - }() - - // Mark as a managed tx so that the inner function cannot manually commit. - t.managed = true - - // If an error is returned from the function then rollback and return error. - err = fn(t) - t.managed = false - if err != nil { - _ = t.Rollback() - return err - } - - return t.Commit() -} - -// View executes a function within the context of a managed read-only transaction. -// Any error that is returned from the function is returned from the View() method. -// -// Attempting to manually rollback within the function will cause a panic. -func (db *DB) View(fn func(*Tx) error) error { - t, err := db.Begin(false) - if err != nil { - return err - } - - // Make sure the transaction rolls back in the event of a panic. - defer func() { - if t.db != nil { - t.rollback() - } - }() - - // Mark as a managed tx so that the inner function cannot manually rollback. - t.managed = true - - // If an error is returned from the function then pass it through. - err = fn(t) - t.managed = false - if err != nil { - _ = t.Rollback() - return err - } - - return t.Rollback() -} - -// Batch calls fn as part of a batch. It behaves similar to Update, -// except: -// -// 1. concurrent Batch calls can be combined into a single Bolt -// transaction. -// -// 2. the function passed to Batch may be called multiple times, -// regardless of whether it returns error or not. -// -// This means that Batch function side effects must be idempotent and -// take permanent effect only after a successful return is seen in -// caller. -// -// The maximum batch size and delay can be adjusted with DB.MaxBatchSize -// and DB.MaxBatchDelay, respectively. -// -// Batch is only useful when there are multiple goroutines calling it. -func (db *DB) Batch(fn func(*Tx) error) error { - errCh := make(chan error, 1) - - db.batchMu.Lock() - if (db.batch == nil) || (db.batch != nil && len(db.batch.calls) >= db.MaxBatchSize) { - // There is no existing batch, or the existing batch is full; start a new one. - db.batch = &batch{ - db: db, - } - db.batch.timer = time.AfterFunc(db.MaxBatchDelay, db.batch.trigger) - } - db.batch.calls = append(db.batch.calls, call{fn: fn, err: errCh}) - if len(db.batch.calls) >= db.MaxBatchSize { - // wake up batch, it's ready to run - go db.batch.trigger() - } - db.batchMu.Unlock() - - err := <-errCh - if err == trySolo { - err = db.Update(fn) - } - return err -} - -type call struct { - fn func(*Tx) error - err chan<- error -} - -type batch struct { - db *DB - timer *time.Timer - start sync.Once - calls []call -} - -// trigger runs the batch if it hasn't already been run. -func (b *batch) trigger() { - b.start.Do(b.run) -} - -// run performs the transactions in the batch and communicates results -// back to DB.Batch. -func (b *batch) run() { - b.db.batchMu.Lock() - b.timer.Stop() - // Make sure no new work is added to this batch, but don't break - // other batches. - if b.db.batch == b { - b.db.batch = nil - } - b.db.batchMu.Unlock() - -retry: - for len(b.calls) > 0 { - var failIdx = -1 - err := b.db.Update(func(tx *Tx) error { - for i, c := range b.calls { - if err := safelyCall(c.fn, tx); err != nil { - failIdx = i - return err - } - } - return nil - }) - - if failIdx >= 0 { - // take the failing transaction out of the batch. it's - // safe to shorten b.calls here because db.batch no longer - // points to us, and we hold the mutex anyway. - c := b.calls[failIdx] - b.calls[failIdx], b.calls = b.calls[len(b.calls)-1], b.calls[:len(b.calls)-1] - // tell the submitter re-run it solo, continue with the rest of the batch - c.err <- trySolo - continue retry - } - - // pass success, or bolt internal errors, to all callers - for _, c := range b.calls { - c.err <- err - } - break retry - } -} - -// trySolo is a special sentinel error value used for signaling that a -// transaction function should be re-run. It should never be seen by -// callers. -var trySolo = errors.New("batch function returned an error and should be re-run solo") - -type panicked struct { - reason interface{} -} - -func (p panicked) Error() string { - if err, ok := p.reason.(error); ok { - return err.Error() - } - return fmt.Sprintf("panic: %v", p.reason) -} - -func safelyCall(fn func(*Tx) error, tx *Tx) (err error) { - defer func() { - if p := recover(); p != nil { - err = panicked{p} - } - }() - return fn(tx) -} - -// Sync executes fdatasync() against the database file handle. -// -// This is not necessary under normal operation, however, if you use NoSync -// then it allows you to force the database file to sync against the disk. -func (db *DB) Sync() error { return fdatasync(db) } - -// Stats retrieves ongoing performance stats for the database. -// This is only updated when a transaction closes. -func (db *DB) Stats() Stats { - db.statlock.RLock() - defer db.statlock.RUnlock() - return db.stats -} - -// This is for internal access to the raw data bytes from the C cursor, use -// carefully, or not at all. -func (db *DB) Info() *Info { - return &Info{uintptr(unsafe.Pointer(&db.data[0])), db.pageSize} -} - -// page retrieves a page reference from the mmap based on the current page size. -func (db *DB) page(id pgid) *page { - pos := id * pgid(db.pageSize) - return (*page)(unsafe.Pointer(&db.data[pos])) -} - -// pageInBuffer retrieves a page reference from a given byte array based on the current page size. -func (db *DB) pageInBuffer(b []byte, id pgid) *page { - return (*page)(unsafe.Pointer(&b[id*pgid(db.pageSize)])) -} - -// meta retrieves the current meta page reference. -func (db *DB) meta() *meta { - // We have to return the meta with the highest txid which doesn't fail - // validation. Otherwise, we can cause errors when in fact the database is - // in a consistent state. metaA is the one with the higher txid. - metaA := db.meta0 - metaB := db.meta1 - if db.meta1.txid > db.meta0.txid { - metaA = db.meta1 - metaB = db.meta0 - } - - // Use higher meta page if valid. Otherwise fallback to previous, if valid. - if err := metaA.validate(); err == nil { - return metaA - } else if err := metaB.validate(); err == nil { - return metaB - } - - // This should never be reached, because both meta1 and meta0 were validated - // on mmap() and we do fsync() on every write. - panic("bolt.DB.meta(): invalid meta pages") -} - -// allocate returns a contiguous block of memory starting at a given page. -func (db *DB) allocate(txid txid, count int) (*page, error) { - // Allocate a temporary buffer for the page. - var buf []byte - if count == 1 { - buf = db.pagePool.Get().([]byte) - } else { - buf = make([]byte, count*db.pageSize) - } - p := (*page)(unsafe.Pointer(&buf[0])) - p.overflow = uint32(count - 1) - - // Use pages from the freelist if they are available. - if p.id = db.freelist.allocate(txid, count); p.id != 0 { - return p, nil - } - - // Resize mmap() if we're at the end. - p.id = db.rwtx.meta.pgid - var minsz = int((p.id+pgid(count))+1) * db.pageSize - if minsz >= db.datasz { - if err := db.mmap(minsz); err != nil { - return nil, fmt.Errorf("mmap allocate error: %s", err) - } - } - - // Move the page id high water mark. - db.rwtx.meta.pgid += pgid(count) - - return p, nil -} - -// grow grows the size of the database to the given sz. -func (db *DB) grow(sz int) error { - // Ignore if the new size is less than available file size. - if sz <= db.filesz { - return nil - } - - // If the data is smaller than the alloc size then only allocate what's needed. - // Once it goes over the allocation size then allocate in chunks. - if db.datasz < db.AllocSize { - sz = db.datasz - } else { - sz += db.AllocSize - } - - // Truncate and fsync to ensure file size metadata is flushed. - // https://github.com/boltdb/bolt/issues/284 - if !db.NoGrowSync && !db.readOnly { - if runtime.GOOS != "windows" { - if err := db.file.Truncate(int64(sz)); err != nil { - return fmt.Errorf("file resize error: %s", err) - } - } - if err := db.file.Sync(); err != nil { - return fmt.Errorf("file sync error: %s", err) - } - if db.Mlock { - // unlock old file and lock new one - if err := db.mrelock(db.filesz, sz); err != nil { - return fmt.Errorf("mlock/munlock error: %s", err) - } - } - } - - db.filesz = sz - return nil -} - -func (db *DB) IsReadOnly() bool { - return db.readOnly -} - -func (db *DB) freepages() []pgid { - tx, err := db.beginTx() - defer func() { - err = tx.Rollback() - if err != nil { - panic("freepages: failed to rollback tx") - } - }() - if err != nil { - panic("freepages: failed to open read only tx") - } - - reachable := make(map[pgid]*page) - nofreed := make(map[pgid]bool) - ech := make(chan error) - go func() { - for e := range ech { - panic(fmt.Sprintf("freepages: failed to get all reachable pages (%v)", e)) - } - }() - tx.checkBucket(&tx.root, reachable, nofreed, ech) - close(ech) - - var fids []pgid - for i := pgid(2); i < db.meta().pgid; i++ { - if _, ok := reachable[i]; !ok { - fids = append(fids, i) - } - } - return fids -} - -// Options represents the options that can be set when opening a database. -type Options struct { - // Timeout is the amount of time to wait to obtain a file lock. - // When set to zero it will wait indefinitely. This option is only - // available on Darwin and Linux. - Timeout time.Duration - - // Sets the DB.NoGrowSync flag before memory mapping the file. - NoGrowSync bool - - // Do not sync freelist to disk. This improves the database write performance - // under normal operation, but requires a full database re-sync during recovery. - NoFreelistSync bool - - // FreelistType sets the backend freelist type. There are two options. Array which is simple but endures - // dramatic performance degradation if database is large and framentation in freelist is common. - // The alternative one is using hashmap, it is faster in almost all circumstances - // but it doesn't guarantee that it offers the smallest page id available. In normal case it is safe. - // The default type is array - FreelistType FreelistType - - // Open database in read-only mode. Uses flock(..., LOCK_SH |LOCK_NB) to - // grab a shared lock (UNIX). - ReadOnly bool - - // Sets the DB.MmapFlags flag before memory mapping the file. - MmapFlags int - - // InitialMmapSize is the initial mmap size of the database - // in bytes. Read transactions won't block write transaction - // if the InitialMmapSize is large enough to hold database mmap - // size. (See DB.Begin for more information) - // - // If <=0, the initial map size is 0. - // If initialMmapSize is smaller than the previous database size, - // it takes no effect. - InitialMmapSize int - - // PageSize overrides the default OS page size. - PageSize int - - // NoSync sets the initial value of DB.NoSync. Normally this can just be - // set directly on the DB itself when returned from Open(), but this option - // is useful in APIs which expose Options but not the underlying DB. - NoSync bool - - // OpenFile is used to open files. It defaults to os.OpenFile. This option - // is useful for writing hermetic tests. - OpenFile func(string, int, os.FileMode) (*os.File, error) - - // Mlock locks database file in memory when set to true. - // It prevents potential page faults, however - // used memory can't be reclaimed. (UNIX only) - Mlock bool -} - -// DefaultOptions represent the options used if nil options are passed into Open(). -// No timeout is used which will cause Bolt to wait indefinitely for a lock. -var DefaultOptions = &Options{ - Timeout: 0, - NoGrowSync: false, - FreelistType: FreelistArrayType, -} - -// Stats represents statistics about the database. -type Stats struct { - // Freelist stats - FreePageN int // total number of free pages on the freelist - PendingPageN int // total number of pending pages on the freelist - FreeAlloc int // total bytes allocated in free pages - FreelistInuse int // total bytes used by the freelist - - // Transaction stats - TxN int // total number of started read transactions - OpenTxN int // number of currently open read transactions - - TxStats TxStats // global, ongoing stats. -} - -// Sub calculates and returns the difference between two sets of database stats. -// This is useful when obtaining stats at two different points and time and -// you need the performance counters that occurred within that time span. -func (s *Stats) Sub(other *Stats) Stats { - if other == nil { - return *s - } - var diff Stats - diff.FreePageN = s.FreePageN - diff.PendingPageN = s.PendingPageN - diff.FreeAlloc = s.FreeAlloc - diff.FreelistInuse = s.FreelistInuse - diff.TxN = s.TxN - other.TxN - diff.TxStats = s.TxStats.Sub(&other.TxStats) - return diff -} - -type Info struct { - Data uintptr - PageSize int -} - -type meta struct { - magic uint32 - version uint32 - pageSize uint32 - flags uint32 - root bucket - freelist pgid - pgid pgid - txid txid - checksum uint64 -} - -// validate checks the marker bytes and version of the meta page to ensure it matches this binary. -func (m *meta) validate() error { - if m.magic != magic { - return ErrInvalid - } else if m.version != version { - return ErrVersionMismatch - } else if m.checksum != 0 && m.checksum != m.sum64() { - return ErrChecksum - } - return nil -} - -// copy copies one meta object to another. -func (m *meta) copy(dest *meta) { - *dest = *m -} - -// write writes the meta onto a page. -func (m *meta) write(p *page) { - if m.root.root >= m.pgid { - panic(fmt.Sprintf("root bucket pgid (%d) above high water mark (%d)", m.root.root, m.pgid)) - } else if m.freelist >= m.pgid && m.freelist != pgidNoFreelist { - // TODO: reject pgidNoFreeList if !NoFreelistSync - panic(fmt.Sprintf("freelist pgid (%d) above high water mark (%d)", m.freelist, m.pgid)) - } - - // Page id is either going to be 0 or 1 which we can determine by the transaction ID. - p.id = pgid(m.txid % 2) - p.flags |= metaPageFlag - - // Calculate the checksum. - m.checksum = m.sum64() - - m.copy(p.meta()) -} - -// generates the checksum for the meta. -func (m *meta) sum64() uint64 { - var h = fnv.New64a() - _, _ = h.Write((*[unsafe.Offsetof(meta{}.checksum)]byte)(unsafe.Pointer(m))[:]) - return h.Sum64() -} - -// _assert will panic with a given formatted message if the given condition is false. -func _assert(condition bool, msg string, v ...interface{}) { - if !condition { - panic(fmt.Sprintf("assertion failed: "+msg, v...)) - } -} diff --git a/vendor/go.etcd.io/bbolt/doc.go b/vendor/go.etcd.io/bbolt/doc.go deleted file mode 100644 index 95f25f01..00000000 --- a/vendor/go.etcd.io/bbolt/doc.go +++ /dev/null @@ -1,44 +0,0 @@ -/* -package bbolt implements a low-level key/value store in pure Go. It supports -fully serializable transactions, ACID semantics, and lock-free MVCC with -multiple readers and a single writer. Bolt can be used for projects that -want a simple data store without the need to add large dependencies such as -Postgres or MySQL. - -Bolt is a single-level, zero-copy, B+tree data store. This means that Bolt is -optimized for fast read access and does not require recovery in the event of a -system crash. Transactions which have not finished committing will simply be -rolled back in the event of a crash. - -The design of Bolt is based on Howard Chu's LMDB database project. - -Bolt currently works on Windows, Mac OS X, and Linux. - - -Basics - -There are only a few types in Bolt: DB, Bucket, Tx, and Cursor. The DB is -a collection of buckets and is represented by a single file on disk. A bucket is -a collection of unique keys that are associated with values. - -Transactions provide either read-only or read-write access to the database. -Read-only transactions can retrieve key/value pairs and can use Cursors to -iterate over the dataset sequentially. Read-write transactions can create and -delete buckets and can insert and remove keys. Only one read-write transaction -is allowed at a time. - - -Caveats - -The database uses a read-only, memory-mapped data file to ensure that -applications cannot corrupt the database, however, this means that keys and -values returned from Bolt cannot be changed. Writing to a read-only byte slice -will cause Go to panic. - -Keys and values retrieved from the database are only valid for the life of -the transaction. When used outside the transaction, these byte slices can -point to different data or can point to invalid memory which will cause a panic. - - -*/ -package bbolt diff --git a/vendor/go.etcd.io/bbolt/errors.go b/vendor/go.etcd.io/bbolt/errors.go deleted file mode 100644 index 48758ca5..00000000 --- a/vendor/go.etcd.io/bbolt/errors.go +++ /dev/null @@ -1,71 +0,0 @@ -package bbolt - -import "errors" - -// These errors can be returned when opening or calling methods on a DB. -var ( - // ErrDatabaseNotOpen is returned when a DB instance is accessed before it - // is opened or after it is closed. - ErrDatabaseNotOpen = errors.New("database not open") - - // ErrDatabaseOpen is returned when opening a database that is - // already open. - ErrDatabaseOpen = errors.New("database already open") - - // ErrInvalid is returned when both meta pages on a database are invalid. - // This typically occurs when a file is not a bolt database. - ErrInvalid = errors.New("invalid database") - - // ErrVersionMismatch is returned when the data file was created with a - // different version of Bolt. - ErrVersionMismatch = errors.New("version mismatch") - - // ErrChecksum is returned when either meta page checksum does not match. - ErrChecksum = errors.New("checksum error") - - // ErrTimeout is returned when a database cannot obtain an exclusive lock - // on the data file after the timeout passed to Open(). - ErrTimeout = errors.New("timeout") -) - -// These errors can occur when beginning or committing a Tx. -var ( - // ErrTxNotWritable is returned when performing a write operation on a - // read-only transaction. - ErrTxNotWritable = errors.New("tx not writable") - - // ErrTxClosed is returned when committing or rolling back a transaction - // that has already been committed or rolled back. - ErrTxClosed = errors.New("tx closed") - - // ErrDatabaseReadOnly is returned when a mutating transaction is started on a - // read-only database. - ErrDatabaseReadOnly = errors.New("database is in read-only mode") -) - -// These errors can occur when putting or deleting a value or a bucket. -var ( - // ErrBucketNotFound is returned when trying to access a bucket that has - // not been created yet. - ErrBucketNotFound = errors.New("bucket not found") - - // ErrBucketExists is returned when creating a bucket that already exists. - ErrBucketExists = errors.New("bucket already exists") - - // ErrBucketNameRequired is returned when creating a bucket with a blank name. - ErrBucketNameRequired = errors.New("bucket name required") - - // ErrKeyRequired is returned when inserting a zero-length key. - ErrKeyRequired = errors.New("key required") - - // ErrKeyTooLarge is returned when inserting a key that is larger than MaxKeySize. - ErrKeyTooLarge = errors.New("key too large") - - // ErrValueTooLarge is returned when inserting a value that is larger than MaxValueSize. - ErrValueTooLarge = errors.New("value too large") - - // ErrIncompatibleValue is returned when trying create or delete a bucket - // on an existing non-bucket key or when trying to create or delete a - // non-bucket key on an existing bucket key. - ErrIncompatibleValue = errors.New("incompatible value") -) diff --git a/vendor/go.etcd.io/bbolt/freelist.go b/vendor/go.etcd.io/bbolt/freelist.go deleted file mode 100644 index 697a4696..00000000 --- a/vendor/go.etcd.io/bbolt/freelist.go +++ /dev/null @@ -1,404 +0,0 @@ -package bbolt - -import ( - "fmt" - "sort" - "unsafe" -) - -// txPending holds a list of pgids and corresponding allocation txns -// that are pending to be freed. -type txPending struct { - ids []pgid - alloctx []txid // txids allocating the ids - lastReleaseBegin txid // beginning txid of last matching releaseRange -} - -// pidSet holds the set of starting pgids which have the same span size -type pidSet map[pgid]struct{} - -// freelist represents a list of all pages that are available for allocation. -// It also tracks pages that have been freed but are still in use by open transactions. -type freelist struct { - freelistType FreelistType // freelist type - ids []pgid // all free and available free page ids. - allocs map[pgid]txid // mapping of txid that allocated a pgid. - pending map[txid]*txPending // mapping of soon-to-be free page ids by tx. - cache map[pgid]bool // fast lookup of all free and pending page ids. - freemaps map[uint64]pidSet // key is the size of continuous pages(span), value is a set which contains the starting pgids of same size - forwardMap map[pgid]uint64 // key is start pgid, value is its span size - backwardMap map[pgid]uint64 // key is end pgid, value is its span size - allocate func(txid txid, n int) pgid // the freelist allocate func - free_count func() int // the function which gives you free page number - mergeSpans func(ids pgids) // the mergeSpan func - getFreePageIDs func() []pgid // get free pgids func - readIDs func(pgids []pgid) // readIDs func reads list of pages and init the freelist -} - -// newFreelist returns an empty, initialized freelist. -func newFreelist(freelistType FreelistType) *freelist { - f := &freelist{ - freelistType: freelistType, - allocs: make(map[pgid]txid), - pending: make(map[txid]*txPending), - cache: make(map[pgid]bool), - freemaps: make(map[uint64]pidSet), - forwardMap: make(map[pgid]uint64), - backwardMap: make(map[pgid]uint64), - } - - if freelistType == FreelistMapType { - f.allocate = f.hashmapAllocate - f.free_count = f.hashmapFreeCount - f.mergeSpans = f.hashmapMergeSpans - f.getFreePageIDs = f.hashmapGetFreePageIDs - f.readIDs = f.hashmapReadIDs - } else { - f.allocate = f.arrayAllocate - f.free_count = f.arrayFreeCount - f.mergeSpans = f.arrayMergeSpans - f.getFreePageIDs = f.arrayGetFreePageIDs - f.readIDs = f.arrayReadIDs - } - - return f -} - -// size returns the size of the page after serialization. -func (f *freelist) size() int { - n := f.count() - if n >= 0xFFFF { - // The first element will be used to store the count. See freelist.write. - n++ - } - return int(pageHeaderSize) + (int(unsafe.Sizeof(pgid(0))) * n) -} - -// count returns count of pages on the freelist -func (f *freelist) count() int { - return f.free_count() + f.pending_count() -} - -// arrayFreeCount returns count of free pages(array version) -func (f *freelist) arrayFreeCount() int { - return len(f.ids) -} - -// pending_count returns count of pending pages -func (f *freelist) pending_count() int { - var count int - for _, txp := range f.pending { - count += len(txp.ids) - } - return count -} - -// copyall copies a list of all free ids and all pending ids in one sorted list. -// f.count returns the minimum length required for dst. -func (f *freelist) copyall(dst []pgid) { - m := make(pgids, 0, f.pending_count()) - for _, txp := range f.pending { - m = append(m, txp.ids...) - } - sort.Sort(m) - mergepgids(dst, f.getFreePageIDs(), m) -} - -// arrayAllocate returns the starting page id of a contiguous list of pages of a given size. -// If a contiguous block cannot be found then 0 is returned. -func (f *freelist) arrayAllocate(txid txid, n int) pgid { - if len(f.ids) == 0 { - return 0 - } - - var initial, previd pgid - for i, id := range f.ids { - if id <= 1 { - panic(fmt.Sprintf("invalid page allocation: %d", id)) - } - - // Reset initial page if this is not contiguous. - if previd == 0 || id-previd != 1 { - initial = id - } - - // If we found a contiguous block then remove it and return it. - if (id-initial)+1 == pgid(n) { - // If we're allocating off the beginning then take the fast path - // and just adjust the existing slice. This will use extra memory - // temporarily but the append() in free() will realloc the slice - // as is necessary. - if (i + 1) == n { - f.ids = f.ids[i+1:] - } else { - copy(f.ids[i-n+1:], f.ids[i+1:]) - f.ids = f.ids[:len(f.ids)-n] - } - - // Remove from the free cache. - for i := pgid(0); i < pgid(n); i++ { - delete(f.cache, initial+i) - } - f.allocs[initial] = txid - return initial - } - - previd = id - } - return 0 -} - -// free releases a page and its overflow for a given transaction id. -// If the page is already free then a panic will occur. -func (f *freelist) free(txid txid, p *page) { - if p.id <= 1 { - panic(fmt.Sprintf("cannot free page 0 or 1: %d", p.id)) - } - - // Free page and all its overflow pages. - txp := f.pending[txid] - if txp == nil { - txp = &txPending{} - f.pending[txid] = txp - } - allocTxid, ok := f.allocs[p.id] - if ok { - delete(f.allocs, p.id) - } else if (p.flags & freelistPageFlag) != 0 { - // Freelist is always allocated by prior tx. - allocTxid = txid - 1 - } - - for id := p.id; id <= p.id+pgid(p.overflow); id++ { - // Verify that page is not already free. - if f.cache[id] { - panic(fmt.Sprintf("page %d already freed", id)) - } - // Add to the freelist and cache. - txp.ids = append(txp.ids, id) - txp.alloctx = append(txp.alloctx, allocTxid) - f.cache[id] = true - } -} - -// release moves all page ids for a transaction id (or older) to the freelist. -func (f *freelist) release(txid txid) { - m := make(pgids, 0) - for tid, txp := range f.pending { - if tid <= txid { - // Move transaction's pending pages to the available freelist. - // Don't remove from the cache since the page is still free. - m = append(m, txp.ids...) - delete(f.pending, tid) - } - } - f.mergeSpans(m) -} - -// releaseRange moves pending pages allocated within an extent [begin,end] to the free list. -func (f *freelist) releaseRange(begin, end txid) { - if begin > end { - return - } - var m pgids - for tid, txp := range f.pending { - if tid < begin || tid > end { - continue - } - // Don't recompute freed pages if ranges haven't updated. - if txp.lastReleaseBegin == begin { - continue - } - for i := 0; i < len(txp.ids); i++ { - if atx := txp.alloctx[i]; atx < begin || atx > end { - continue - } - m = append(m, txp.ids[i]) - txp.ids[i] = txp.ids[len(txp.ids)-1] - txp.ids = txp.ids[:len(txp.ids)-1] - txp.alloctx[i] = txp.alloctx[len(txp.alloctx)-1] - txp.alloctx = txp.alloctx[:len(txp.alloctx)-1] - i-- - } - txp.lastReleaseBegin = begin - if len(txp.ids) == 0 { - delete(f.pending, tid) - } - } - f.mergeSpans(m) -} - -// rollback removes the pages from a given pending tx. -func (f *freelist) rollback(txid txid) { - // Remove page ids from cache. - txp := f.pending[txid] - if txp == nil { - return - } - var m pgids - for i, pgid := range txp.ids { - delete(f.cache, pgid) - tx := txp.alloctx[i] - if tx == 0 { - continue - } - if tx != txid { - // Pending free aborted; restore page back to alloc list. - f.allocs[pgid] = tx - } else { - // Freed page was allocated by this txn; OK to throw away. - m = append(m, pgid) - } - } - // Remove pages from pending list and mark as free if allocated by txid. - delete(f.pending, txid) - f.mergeSpans(m) -} - -// freed returns whether a given page is in the free list. -func (f *freelist) freed(pgid pgid) bool { - return f.cache[pgid] -} - -// read initializes the freelist from a freelist page. -func (f *freelist) read(p *page) { - if (p.flags & freelistPageFlag) == 0 { - panic(fmt.Sprintf("invalid freelist page: %d, page type is %s", p.id, p.typ())) - } - // If the page.count is at the max uint16 value (64k) then it's considered - // an overflow and the size of the freelist is stored as the first element. - var idx, count = 0, int(p.count) - if count == 0xFFFF { - idx = 1 - c := *(*pgid)(unsafeAdd(unsafe.Pointer(p), unsafe.Sizeof(*p))) - count = int(c) - if count < 0 { - panic(fmt.Sprintf("leading element count %d overflows int", c)) - } - } - - // Copy the list of page ids from the freelist. - if count == 0 { - f.ids = nil - } else { - var ids []pgid - data := unsafeIndex(unsafe.Pointer(p), unsafe.Sizeof(*p), unsafe.Sizeof(ids[0]), idx) - unsafeSlice(unsafe.Pointer(&ids), data, count) - - // copy the ids, so we don't modify on the freelist page directly - idsCopy := make([]pgid, count) - copy(idsCopy, ids) - // Make sure they're sorted. - sort.Sort(pgids(idsCopy)) - - f.readIDs(idsCopy) - } -} - -// arrayReadIDs initializes the freelist from a given list of ids. -func (f *freelist) arrayReadIDs(ids []pgid) { - f.ids = ids - f.reindex() -} - -func (f *freelist) arrayGetFreePageIDs() []pgid { - return f.ids -} - -// write writes the page ids onto a freelist page. All free and pending ids are -// saved to disk since in the event of a program crash, all pending ids will -// become free. -func (f *freelist) write(p *page) error { - // Combine the old free pgids and pgids waiting on an open transaction. - - // Update the header flag. - p.flags |= freelistPageFlag - - // The page.count can only hold up to 64k elements so if we overflow that - // number then we handle it by putting the size in the first element. - l := f.count() - if l == 0 { - p.count = uint16(l) - } else if l < 0xFFFF { - p.count = uint16(l) - var ids []pgid - data := unsafeAdd(unsafe.Pointer(p), unsafe.Sizeof(*p)) - unsafeSlice(unsafe.Pointer(&ids), data, l) - f.copyall(ids) - } else { - p.count = 0xFFFF - var ids []pgid - data := unsafeAdd(unsafe.Pointer(p), unsafe.Sizeof(*p)) - unsafeSlice(unsafe.Pointer(&ids), data, l+1) - ids[0] = pgid(l) - f.copyall(ids[1:]) - } - - return nil -} - -// reload reads the freelist from a page and filters out pending items. -func (f *freelist) reload(p *page) { - f.read(p) - - // Build a cache of only pending pages. - pcache := make(map[pgid]bool) - for _, txp := range f.pending { - for _, pendingID := range txp.ids { - pcache[pendingID] = true - } - } - - // Check each page in the freelist and build a new available freelist - // with any pages not in the pending lists. - var a []pgid - for _, id := range f.getFreePageIDs() { - if !pcache[id] { - a = append(a, id) - } - } - - f.readIDs(a) -} - -// noSyncReload reads the freelist from pgids and filters out pending items. -func (f *freelist) noSyncReload(pgids []pgid) { - // Build a cache of only pending pages. - pcache := make(map[pgid]bool) - for _, txp := range f.pending { - for _, pendingID := range txp.ids { - pcache[pendingID] = true - } - } - - // Check each page in the freelist and build a new available freelist - // with any pages not in the pending lists. - var a []pgid - for _, id := range pgids { - if !pcache[id] { - a = append(a, id) - } - } - - f.readIDs(a) -} - -// reindex rebuilds the free cache based on available and pending free lists. -func (f *freelist) reindex() { - ids := f.getFreePageIDs() - f.cache = make(map[pgid]bool, len(ids)) - for _, id := range ids { - f.cache[id] = true - } - for _, txp := range f.pending { - for _, pendingID := range txp.ids { - f.cache[pendingID] = true - } - } -} - -// arrayMergeSpans try to merge list of pages(represented by pgids) with existing spans but using array -func (f *freelist) arrayMergeSpans(ids pgids) { - sort.Sort(ids) - f.ids = pgids(f.ids).merge(ids) -} diff --git a/vendor/go.etcd.io/bbolt/freelist_hmap.go b/vendor/go.etcd.io/bbolt/freelist_hmap.go deleted file mode 100644 index dbd67a1e..00000000 --- a/vendor/go.etcd.io/bbolt/freelist_hmap.go +++ /dev/null @@ -1,178 +0,0 @@ -package bbolt - -import "sort" - -// hashmapFreeCount returns count of free pages(hashmap version) -func (f *freelist) hashmapFreeCount() int { - // use the forwardMap to get the total count - count := 0 - for _, size := range f.forwardMap { - count += int(size) - } - return count -} - -// hashmapAllocate serves the same purpose as arrayAllocate, but use hashmap as backend -func (f *freelist) hashmapAllocate(txid txid, n int) pgid { - if n == 0 { - return 0 - } - - // if we have a exact size match just return short path - if bm, ok := f.freemaps[uint64(n)]; ok { - for pid := range bm { - // remove the span - f.delSpan(pid, uint64(n)) - - f.allocs[pid] = txid - - for i := pgid(0); i < pgid(n); i++ { - delete(f.cache, pid+i) - } - return pid - } - } - - // lookup the map to find larger span - for size, bm := range f.freemaps { - if size < uint64(n) { - continue - } - - for pid := range bm { - // remove the initial - f.delSpan(pid, size) - - f.allocs[pid] = txid - - remain := size - uint64(n) - - // add remain span - f.addSpan(pid+pgid(n), remain) - - for i := pgid(0); i < pgid(n); i++ { - delete(f.cache, pid+i) - } - return pid - } - } - - return 0 -} - -// hashmapReadIDs reads pgids as input an initial the freelist(hashmap version) -func (f *freelist) hashmapReadIDs(pgids []pgid) { - f.init(pgids) - - // Rebuild the page cache. - f.reindex() -} - -// hashmapGetFreePageIDs returns the sorted free page ids -func (f *freelist) hashmapGetFreePageIDs() []pgid { - count := f.free_count() - if count == 0 { - return nil - } - - m := make([]pgid, 0, count) - for start, size := range f.forwardMap { - for i := 0; i < int(size); i++ { - m = append(m, start+pgid(i)) - } - } - sort.Sort(pgids(m)) - - return m -} - -// hashmapMergeSpans try to merge list of pages(represented by pgids) with existing spans -func (f *freelist) hashmapMergeSpans(ids pgids) { - for _, id := range ids { - // try to see if we can merge and update - f.mergeWithExistingSpan(id) - } -} - -// mergeWithExistingSpan merges pid to the existing free spans, try to merge it backward and forward -func (f *freelist) mergeWithExistingSpan(pid pgid) { - prev := pid - 1 - next := pid + 1 - - preSize, mergeWithPrev := f.backwardMap[prev] - nextSize, mergeWithNext := f.forwardMap[next] - newStart := pid - newSize := uint64(1) - - if mergeWithPrev { - //merge with previous span - start := prev + 1 - pgid(preSize) - f.delSpan(start, preSize) - - newStart -= pgid(preSize) - newSize += preSize - } - - if mergeWithNext { - // merge with next span - f.delSpan(next, nextSize) - newSize += nextSize - } - - f.addSpan(newStart, newSize) -} - -func (f *freelist) addSpan(start pgid, size uint64) { - f.backwardMap[start-1+pgid(size)] = size - f.forwardMap[start] = size - if _, ok := f.freemaps[size]; !ok { - f.freemaps[size] = make(map[pgid]struct{}) - } - - f.freemaps[size][start] = struct{}{} -} - -func (f *freelist) delSpan(start pgid, size uint64) { - delete(f.forwardMap, start) - delete(f.backwardMap, start+pgid(size-1)) - delete(f.freemaps[size], start) - if len(f.freemaps[size]) == 0 { - delete(f.freemaps, size) - } -} - -// initial from pgids using when use hashmap version -// pgids must be sorted -func (f *freelist) init(pgids []pgid) { - if len(pgids) == 0 { - return - } - - size := uint64(1) - start := pgids[0] - - if !sort.SliceIsSorted([]pgid(pgids), func(i, j int) bool { return pgids[i] < pgids[j] }) { - panic("pgids not sorted") - } - - f.freemaps = make(map[uint64]pidSet) - f.forwardMap = make(map[pgid]uint64) - f.backwardMap = make(map[pgid]uint64) - - for i := 1; i < len(pgids); i++ { - // continuous page - if pgids[i] == pgids[i-1]+1 { - size++ - } else { - f.addSpan(start, size) - - size = 1 - start = pgids[i] - } - } - - // init the tail - if size != 0 && start != 0 { - f.addSpan(start, size) - } -} diff --git a/vendor/go.etcd.io/bbolt/mlock_unix.go b/vendor/go.etcd.io/bbolt/mlock_unix.go deleted file mode 100644 index 6a6c7b35..00000000 --- a/vendor/go.etcd.io/bbolt/mlock_unix.go +++ /dev/null @@ -1,36 +0,0 @@ -// +build !windows - -package bbolt - -import "golang.org/x/sys/unix" - -// mlock locks memory of db file -func mlock(db *DB, fileSize int) error { - sizeToLock := fileSize - if sizeToLock > db.datasz { - // Can't lock more than mmaped slice - sizeToLock = db.datasz - } - if err := unix.Mlock(db.dataref[:sizeToLock]); err != nil { - return err - } - return nil -} - -//munlock unlocks memory of db file -func munlock(db *DB, fileSize int) error { - if db.dataref == nil { - return nil - } - - sizeToUnlock := fileSize - if sizeToUnlock > db.datasz { - // Can't unlock more than mmaped slice - sizeToUnlock = db.datasz - } - - if err := unix.Munlock(db.dataref[:sizeToUnlock]); err != nil { - return err - } - return nil -} diff --git a/vendor/go.etcd.io/bbolt/mlock_windows.go b/vendor/go.etcd.io/bbolt/mlock_windows.go deleted file mode 100644 index b4a36a49..00000000 --- a/vendor/go.etcd.io/bbolt/mlock_windows.go +++ /dev/null @@ -1,11 +0,0 @@ -package bbolt - -// mlock locks memory of db file -func mlock(_ *DB, _ int) error { - panic("mlock is supported only on UNIX systems") -} - -//munlock unlocks memory of db file -func munlock(_ *DB, _ int) error { - panic("munlock is supported only on UNIX systems") -} diff --git a/vendor/go.etcd.io/bbolt/node.go b/vendor/go.etcd.io/bbolt/node.go deleted file mode 100644 index 73988b5c..00000000 --- a/vendor/go.etcd.io/bbolt/node.go +++ /dev/null @@ -1,602 +0,0 @@ -package bbolt - -import ( - "bytes" - "fmt" - "sort" - "unsafe" -) - -// node represents an in-memory, deserialized page. -type node struct { - bucket *Bucket - isLeaf bool - unbalanced bool - spilled bool - key []byte - pgid pgid - parent *node - children nodes - inodes inodes -} - -// root returns the top-level node this node is attached to. -func (n *node) root() *node { - if n.parent == nil { - return n - } - return n.parent.root() -} - -// minKeys returns the minimum number of inodes this node should have. -func (n *node) minKeys() int { - if n.isLeaf { - return 1 - } - return 2 -} - -// size returns the size of the node after serialization. -func (n *node) size() int { - sz, elsz := pageHeaderSize, n.pageElementSize() - for i := 0; i < len(n.inodes); i++ { - item := &n.inodes[i] - sz += elsz + uintptr(len(item.key)) + uintptr(len(item.value)) - } - return int(sz) -} - -// sizeLessThan returns true if the node is less than a given size. -// This is an optimization to avoid calculating a large node when we only need -// to know if it fits inside a certain page size. -func (n *node) sizeLessThan(v uintptr) bool { - sz, elsz := pageHeaderSize, n.pageElementSize() - for i := 0; i < len(n.inodes); i++ { - item := &n.inodes[i] - sz += elsz + uintptr(len(item.key)) + uintptr(len(item.value)) - if sz >= v { - return false - } - } - return true -} - -// pageElementSize returns the size of each page element based on the type of node. -func (n *node) pageElementSize() uintptr { - if n.isLeaf { - return leafPageElementSize - } - return branchPageElementSize -} - -// childAt returns the child node at a given index. -func (n *node) childAt(index int) *node { - if n.isLeaf { - panic(fmt.Sprintf("invalid childAt(%d) on a leaf node", index)) - } - return n.bucket.node(n.inodes[index].pgid, n) -} - -// childIndex returns the index of a given child node. -func (n *node) childIndex(child *node) int { - index := sort.Search(len(n.inodes), func(i int) bool { return bytes.Compare(n.inodes[i].key, child.key) != -1 }) - return index -} - -// numChildren returns the number of children. -func (n *node) numChildren() int { - return len(n.inodes) -} - -// nextSibling returns the next node with the same parent. -func (n *node) nextSibling() *node { - if n.parent == nil { - return nil - } - index := n.parent.childIndex(n) - if index >= n.parent.numChildren()-1 { - return nil - } - return n.parent.childAt(index + 1) -} - -// prevSibling returns the previous node with the same parent. -func (n *node) prevSibling() *node { - if n.parent == nil { - return nil - } - index := n.parent.childIndex(n) - if index == 0 { - return nil - } - return n.parent.childAt(index - 1) -} - -// put inserts a key/value. -func (n *node) put(oldKey, newKey, value []byte, pgid pgid, flags uint32) { - if pgid >= n.bucket.tx.meta.pgid { - panic(fmt.Sprintf("pgid (%d) above high water mark (%d)", pgid, n.bucket.tx.meta.pgid)) - } else if len(oldKey) <= 0 { - panic("put: zero-length old key") - } else if len(newKey) <= 0 { - panic("put: zero-length new key") - } - - // Find insertion index. - index := sort.Search(len(n.inodes), func(i int) bool { return bytes.Compare(n.inodes[i].key, oldKey) != -1 }) - - // Add capacity and shift nodes if we don't have an exact match and need to insert. - exact := (len(n.inodes) > 0 && index < len(n.inodes) && bytes.Equal(n.inodes[index].key, oldKey)) - if !exact { - n.inodes = append(n.inodes, inode{}) - copy(n.inodes[index+1:], n.inodes[index:]) - } - - inode := &n.inodes[index] - inode.flags = flags - inode.key = newKey - inode.value = value - inode.pgid = pgid - _assert(len(inode.key) > 0, "put: zero-length inode key") -} - -// del removes a key from the node. -func (n *node) del(key []byte) { - // Find index of key. - index := sort.Search(len(n.inodes), func(i int) bool { return bytes.Compare(n.inodes[i].key, key) != -1 }) - - // Exit if the key isn't found. - if index >= len(n.inodes) || !bytes.Equal(n.inodes[index].key, key) { - return - } - - // Delete inode from the node. - n.inodes = append(n.inodes[:index], n.inodes[index+1:]...) - - // Mark the node as needing rebalancing. - n.unbalanced = true -} - -// read initializes the node from a page. -func (n *node) read(p *page) { - n.pgid = p.id - n.isLeaf = ((p.flags & leafPageFlag) != 0) - n.inodes = make(inodes, int(p.count)) - - for i := 0; i < int(p.count); i++ { - inode := &n.inodes[i] - if n.isLeaf { - elem := p.leafPageElement(uint16(i)) - inode.flags = elem.flags - inode.key = elem.key() - inode.value = elem.value() - } else { - elem := p.branchPageElement(uint16(i)) - inode.pgid = elem.pgid - inode.key = elem.key() - } - _assert(len(inode.key) > 0, "read: zero-length inode key") - } - - // Save first key so we can find the node in the parent when we spill. - if len(n.inodes) > 0 { - n.key = n.inodes[0].key - _assert(len(n.key) > 0, "read: zero-length node key") - } else { - n.key = nil - } -} - -// write writes the items onto one or more pages. -func (n *node) write(p *page) { - // Initialize page. - if n.isLeaf { - p.flags |= leafPageFlag - } else { - p.flags |= branchPageFlag - } - - if len(n.inodes) >= 0xFFFF { - panic(fmt.Sprintf("inode overflow: %d (pgid=%d)", len(n.inodes), p.id)) - } - p.count = uint16(len(n.inodes)) - - // Stop here if there are no items to write. - if p.count == 0 { - return - } - - // Loop over each item and write it to the page. - // off tracks the offset into p of the start of the next data. - off := unsafe.Sizeof(*p) + n.pageElementSize()*uintptr(len(n.inodes)) - for i, item := range n.inodes { - _assert(len(item.key) > 0, "write: zero-length inode key") - - // Create a slice to write into of needed size and advance - // byte pointer for next iteration. - sz := len(item.key) + len(item.value) - b := unsafeByteSlice(unsafe.Pointer(p), off, 0, sz) - off += uintptr(sz) - - // Write the page element. - if n.isLeaf { - elem := p.leafPageElement(uint16(i)) - elem.pos = uint32(uintptr(unsafe.Pointer(&b[0])) - uintptr(unsafe.Pointer(elem))) - elem.flags = item.flags - elem.ksize = uint32(len(item.key)) - elem.vsize = uint32(len(item.value)) - } else { - elem := p.branchPageElement(uint16(i)) - elem.pos = uint32(uintptr(unsafe.Pointer(&b[0])) - uintptr(unsafe.Pointer(elem))) - elem.ksize = uint32(len(item.key)) - elem.pgid = item.pgid - _assert(elem.pgid != p.id, "write: circular dependency occurred") - } - - // Write data for the element to the end of the page. - l := copy(b, item.key) - copy(b[l:], item.value) - } - - // DEBUG ONLY: n.dump() -} - -// split breaks up a node into multiple smaller nodes, if appropriate. -// This should only be called from the spill() function. -func (n *node) split(pageSize uintptr) []*node { - var nodes []*node - - node := n - for { - // Split node into two. - a, b := node.splitTwo(pageSize) - nodes = append(nodes, a) - - // If we can't split then exit the loop. - if b == nil { - break - } - - // Set node to b so it gets split on the next iteration. - node = b - } - - return nodes -} - -// splitTwo breaks up a node into two smaller nodes, if appropriate. -// This should only be called from the split() function. -func (n *node) splitTwo(pageSize uintptr) (*node, *node) { - // Ignore the split if the page doesn't have at least enough nodes for - // two pages or if the nodes can fit in a single page. - if len(n.inodes) <= (minKeysPerPage*2) || n.sizeLessThan(pageSize) { - return n, nil - } - - // Determine the threshold before starting a new node. - var fillPercent = n.bucket.FillPercent - if fillPercent < minFillPercent { - fillPercent = minFillPercent - } else if fillPercent > maxFillPercent { - fillPercent = maxFillPercent - } - threshold := int(float64(pageSize) * fillPercent) - - // Determine split position and sizes of the two pages. - splitIndex, _ := n.splitIndex(threshold) - - // Split node into two separate nodes. - // If there's no parent then we'll need to create one. - if n.parent == nil { - n.parent = &node{bucket: n.bucket, children: []*node{n}} - } - - // Create a new node and add it to the parent. - next := &node{bucket: n.bucket, isLeaf: n.isLeaf, parent: n.parent} - n.parent.children = append(n.parent.children, next) - - // Split inodes across two nodes. - next.inodes = n.inodes[splitIndex:] - n.inodes = n.inodes[:splitIndex] - - // Update the statistics. - n.bucket.tx.stats.Split++ - - return n, next -} - -// splitIndex finds the position where a page will fill a given threshold. -// It returns the index as well as the size of the first page. -// This is only be called from split(). -func (n *node) splitIndex(threshold int) (index, sz uintptr) { - sz = pageHeaderSize - - // Loop until we only have the minimum number of keys required for the second page. - for i := 0; i < len(n.inodes)-minKeysPerPage; i++ { - index = uintptr(i) - inode := n.inodes[i] - elsize := n.pageElementSize() + uintptr(len(inode.key)) + uintptr(len(inode.value)) - - // If we have at least the minimum number of keys and adding another - // node would put us over the threshold then exit and return. - if index >= minKeysPerPage && sz+elsize > uintptr(threshold) { - break - } - - // Add the element size to the total size. - sz += elsize - } - - return -} - -// spill writes the nodes to dirty pages and splits nodes as it goes. -// Returns an error if dirty pages cannot be allocated. -func (n *node) spill() error { - var tx = n.bucket.tx - if n.spilled { - return nil - } - - // Spill child nodes first. Child nodes can materialize sibling nodes in - // the case of split-merge so we cannot use a range loop. We have to check - // the children size on every loop iteration. - sort.Sort(n.children) - for i := 0; i < len(n.children); i++ { - if err := n.children[i].spill(); err != nil { - return err - } - } - - // We no longer need the child list because it's only used for spill tracking. - n.children = nil - - // Split nodes into appropriate sizes. The first node will always be n. - var nodes = n.split(uintptr(tx.db.pageSize)) - for _, node := range nodes { - // Add node's page to the freelist if it's not new. - if node.pgid > 0 { - tx.db.freelist.free(tx.meta.txid, tx.page(node.pgid)) - node.pgid = 0 - } - - // Allocate contiguous space for the node. - p, err := tx.allocate((node.size() + tx.db.pageSize - 1) / tx.db.pageSize) - if err != nil { - return err - } - - // Write the node. - if p.id >= tx.meta.pgid { - panic(fmt.Sprintf("pgid (%d) above high water mark (%d)", p.id, tx.meta.pgid)) - } - node.pgid = p.id - node.write(p) - node.spilled = true - - // Insert into parent inodes. - if node.parent != nil { - var key = node.key - if key == nil { - key = node.inodes[0].key - } - - node.parent.put(key, node.inodes[0].key, nil, node.pgid, 0) - node.key = node.inodes[0].key - _assert(len(node.key) > 0, "spill: zero-length node key") - } - - // Update the statistics. - tx.stats.Spill++ - } - - // If the root node split and created a new root then we need to spill that - // as well. We'll clear out the children to make sure it doesn't try to respill. - if n.parent != nil && n.parent.pgid == 0 { - n.children = nil - return n.parent.spill() - } - - return nil -} - -// rebalance attempts to combine the node with sibling nodes if the node fill -// size is below a threshold or if there are not enough keys. -func (n *node) rebalance() { - if !n.unbalanced { - return - } - n.unbalanced = false - - // Update statistics. - n.bucket.tx.stats.Rebalance++ - - // Ignore if node is above threshold (25%) and has enough keys. - var threshold = n.bucket.tx.db.pageSize / 4 - if n.size() > threshold && len(n.inodes) > n.minKeys() { - return - } - - // Root node has special handling. - if n.parent == nil { - // If root node is a branch and only has one node then collapse it. - if !n.isLeaf && len(n.inodes) == 1 { - // Move root's child up. - child := n.bucket.node(n.inodes[0].pgid, n) - n.isLeaf = child.isLeaf - n.inodes = child.inodes[:] - n.children = child.children - - // Reparent all child nodes being moved. - for _, inode := range n.inodes { - if child, ok := n.bucket.nodes[inode.pgid]; ok { - child.parent = n - } - } - - // Remove old child. - child.parent = nil - delete(n.bucket.nodes, child.pgid) - child.free() - } - - return - } - - // If node has no keys then just remove it. - if n.numChildren() == 0 { - n.parent.del(n.key) - n.parent.removeChild(n) - delete(n.bucket.nodes, n.pgid) - n.free() - n.parent.rebalance() - return - } - - _assert(n.parent.numChildren() > 1, "parent must have at least 2 children") - - // Destination node is right sibling if idx == 0, otherwise left sibling. - var target *node - var useNextSibling = (n.parent.childIndex(n) == 0) - if useNextSibling { - target = n.nextSibling() - } else { - target = n.prevSibling() - } - - // If both this node and the target node are too small then merge them. - if useNextSibling { - // Reparent all child nodes being moved. - for _, inode := range target.inodes { - if child, ok := n.bucket.nodes[inode.pgid]; ok { - child.parent.removeChild(child) - child.parent = n - child.parent.children = append(child.parent.children, child) - } - } - - // Copy over inodes from target and remove target. - n.inodes = append(n.inodes, target.inodes...) - n.parent.del(target.key) - n.parent.removeChild(target) - delete(n.bucket.nodes, target.pgid) - target.free() - } else { - // Reparent all child nodes being moved. - for _, inode := range n.inodes { - if child, ok := n.bucket.nodes[inode.pgid]; ok { - child.parent.removeChild(child) - child.parent = target - child.parent.children = append(child.parent.children, child) - } - } - - // Copy over inodes to target and remove node. - target.inodes = append(target.inodes, n.inodes...) - n.parent.del(n.key) - n.parent.removeChild(n) - delete(n.bucket.nodes, n.pgid) - n.free() - } - - // Either this node or the target node was deleted from the parent so rebalance it. - n.parent.rebalance() -} - -// removes a node from the list of in-memory children. -// This does not affect the inodes. -func (n *node) removeChild(target *node) { - for i, child := range n.children { - if child == target { - n.children = append(n.children[:i], n.children[i+1:]...) - return - } - } -} - -// dereference causes the node to copy all its inode key/value references to heap memory. -// This is required when the mmap is reallocated so inodes are not pointing to stale data. -func (n *node) dereference() { - if n.key != nil { - key := make([]byte, len(n.key)) - copy(key, n.key) - n.key = key - _assert(n.pgid == 0 || len(n.key) > 0, "dereference: zero-length node key on existing node") - } - - for i := range n.inodes { - inode := &n.inodes[i] - - key := make([]byte, len(inode.key)) - copy(key, inode.key) - inode.key = key - _assert(len(inode.key) > 0, "dereference: zero-length inode key") - - value := make([]byte, len(inode.value)) - copy(value, inode.value) - inode.value = value - } - - // Recursively dereference children. - for _, child := range n.children { - child.dereference() - } - - // Update statistics. - n.bucket.tx.stats.NodeDeref++ -} - -// free adds the node's underlying page to the freelist. -func (n *node) free() { - if n.pgid != 0 { - n.bucket.tx.db.freelist.free(n.bucket.tx.meta.txid, n.bucket.tx.page(n.pgid)) - n.pgid = 0 - } -} - -// dump writes the contents of the node to STDERR for debugging purposes. -/* -func (n *node) dump() { - // Write node header. - var typ = "branch" - if n.isLeaf { - typ = "leaf" - } - warnf("[NODE %d {type=%s count=%d}]", n.pgid, typ, len(n.inodes)) - - // Write out abbreviated version of each item. - for _, item := range n.inodes { - if n.isLeaf { - if item.flags&bucketLeafFlag != 0 { - bucket := (*bucket)(unsafe.Pointer(&item.value[0])) - warnf("+L %08x -> (bucket root=%d)", trunc(item.key, 4), bucket.root) - } else { - warnf("+L %08x -> %08x", trunc(item.key, 4), trunc(item.value, 4)) - } - } else { - warnf("+B %08x -> pgid=%d", trunc(item.key, 4), item.pgid) - } - } - warn("") -} -*/ - -type nodes []*node - -func (s nodes) Len() int { return len(s) } -func (s nodes) Swap(i, j int) { s[i], s[j] = s[j], s[i] } -func (s nodes) Less(i, j int) bool { - return bytes.Compare(s[i].inodes[0].key, s[j].inodes[0].key) == -1 -} - -// inode represents an internal node inside of a node. -// It can be used to point to elements in a page or point -// to an element which hasn't been added to a page yet. -type inode struct { - flags uint32 - pgid pgid - key []byte - value []byte -} - -type inodes []inode diff --git a/vendor/go.etcd.io/bbolt/page.go b/vendor/go.etcd.io/bbolt/page.go deleted file mode 100644 index c9a158fb..00000000 --- a/vendor/go.etcd.io/bbolt/page.go +++ /dev/null @@ -1,204 +0,0 @@ -package bbolt - -import ( - "fmt" - "os" - "sort" - "unsafe" -) - -const pageHeaderSize = unsafe.Sizeof(page{}) - -const minKeysPerPage = 2 - -const branchPageElementSize = unsafe.Sizeof(branchPageElement{}) -const leafPageElementSize = unsafe.Sizeof(leafPageElement{}) - -const ( - branchPageFlag = 0x01 - leafPageFlag = 0x02 - metaPageFlag = 0x04 - freelistPageFlag = 0x10 -) - -const ( - bucketLeafFlag = 0x01 -) - -type pgid uint64 - -type page struct { - id pgid - flags uint16 - count uint16 - overflow uint32 -} - -// typ returns a human readable page type string used for debugging. -func (p *page) typ() string { - if (p.flags & branchPageFlag) != 0 { - return "branch" - } else if (p.flags & leafPageFlag) != 0 { - return "leaf" - } else if (p.flags & metaPageFlag) != 0 { - return "meta" - } else if (p.flags & freelistPageFlag) != 0 { - return "freelist" - } - return fmt.Sprintf("unknown<%02x>", p.flags) -} - -// meta returns a pointer to the metadata section of the page. -func (p *page) meta() *meta { - return (*meta)(unsafeAdd(unsafe.Pointer(p), unsafe.Sizeof(*p))) -} - -// leafPageElement retrieves the leaf node by index -func (p *page) leafPageElement(index uint16) *leafPageElement { - return (*leafPageElement)(unsafeIndex(unsafe.Pointer(p), unsafe.Sizeof(*p), - leafPageElementSize, int(index))) -} - -// leafPageElements retrieves a list of leaf nodes. -func (p *page) leafPageElements() []leafPageElement { - if p.count == 0 { - return nil - } - var elems []leafPageElement - data := unsafeAdd(unsafe.Pointer(p), unsafe.Sizeof(*p)) - unsafeSlice(unsafe.Pointer(&elems), data, int(p.count)) - return elems -} - -// branchPageElement retrieves the branch node by index -func (p *page) branchPageElement(index uint16) *branchPageElement { - return (*branchPageElement)(unsafeIndex(unsafe.Pointer(p), unsafe.Sizeof(*p), - unsafe.Sizeof(branchPageElement{}), int(index))) -} - -// branchPageElements retrieves a list of branch nodes. -func (p *page) branchPageElements() []branchPageElement { - if p.count == 0 { - return nil - } - var elems []branchPageElement - data := unsafeAdd(unsafe.Pointer(p), unsafe.Sizeof(*p)) - unsafeSlice(unsafe.Pointer(&elems), data, int(p.count)) - return elems -} - -// dump writes n bytes of the page to STDERR as hex output. -func (p *page) hexdump(n int) { - buf := unsafeByteSlice(unsafe.Pointer(p), 0, 0, n) - fmt.Fprintf(os.Stderr, "%x\n", buf) -} - -type pages []*page - -func (s pages) Len() int { return len(s) } -func (s pages) Swap(i, j int) { s[i], s[j] = s[j], s[i] } -func (s pages) Less(i, j int) bool { return s[i].id < s[j].id } - -// branchPageElement represents a node on a branch page. -type branchPageElement struct { - pos uint32 - ksize uint32 - pgid pgid -} - -// key returns a byte slice of the node key. -func (n *branchPageElement) key() []byte { - return unsafeByteSlice(unsafe.Pointer(n), 0, int(n.pos), int(n.pos)+int(n.ksize)) -} - -// leafPageElement represents a node on a leaf page. -type leafPageElement struct { - flags uint32 - pos uint32 - ksize uint32 - vsize uint32 -} - -// key returns a byte slice of the node key. -func (n *leafPageElement) key() []byte { - i := int(n.pos) - j := i + int(n.ksize) - return unsafeByteSlice(unsafe.Pointer(n), 0, i, j) -} - -// value returns a byte slice of the node value. -func (n *leafPageElement) value() []byte { - i := int(n.pos) + int(n.ksize) - j := i + int(n.vsize) - return unsafeByteSlice(unsafe.Pointer(n), 0, i, j) -} - -// PageInfo represents human readable information about a page. -type PageInfo struct { - ID int - Type string - Count int - OverflowCount int -} - -type pgids []pgid - -func (s pgids) Len() int { return len(s) } -func (s pgids) Swap(i, j int) { s[i], s[j] = s[j], s[i] } -func (s pgids) Less(i, j int) bool { return s[i] < s[j] } - -// merge returns the sorted union of a and b. -func (a pgids) merge(b pgids) pgids { - // Return the opposite slice if one is nil. - if len(a) == 0 { - return b - } - if len(b) == 0 { - return a - } - merged := make(pgids, len(a)+len(b)) - mergepgids(merged, a, b) - return merged -} - -// mergepgids copies the sorted union of a and b into dst. -// If dst is too small, it panics. -func mergepgids(dst, a, b pgids) { - if len(dst) < len(a)+len(b) { - panic(fmt.Errorf("mergepgids bad len %d < %d + %d", len(dst), len(a), len(b))) - } - // Copy in the opposite slice if one is nil. - if len(a) == 0 { - copy(dst, b) - return - } - if len(b) == 0 { - copy(dst, a) - return - } - - // Merged will hold all elements from both lists. - merged := dst[:0] - - // Assign lead to the slice with a lower starting value, follow to the higher value. - lead, follow := a, b - if b[0] < a[0] { - lead, follow = b, a - } - - // Continue while there are elements in the lead. - for len(lead) > 0 { - // Merge largest prefix of lead that is ahead of follow[0]. - n := sort.Search(len(lead), func(i int) bool { return lead[i] > follow[0] }) - merged = append(merged, lead[:n]...) - if n >= len(lead) { - break - } - - // Swap lead and follow. - lead, follow = follow, lead[n:] - } - - // Append what's left in follow. - _ = append(merged, follow...) -} diff --git a/vendor/go.etcd.io/bbolt/tx.go b/vendor/go.etcd.io/bbolt/tx.go deleted file mode 100644 index 869d4120..00000000 --- a/vendor/go.etcd.io/bbolt/tx.go +++ /dev/null @@ -1,723 +0,0 @@ -package bbolt - -import ( - "fmt" - "io" - "os" - "sort" - "strings" - "time" - "unsafe" -) - -// txid represents the internal transaction identifier. -type txid uint64 - -// Tx represents a read-only or read/write transaction on the database. -// Read-only transactions can be used for retrieving values for keys and creating cursors. -// Read/write transactions can create and remove buckets and create and remove keys. -// -// IMPORTANT: You must commit or rollback transactions when you are done with -// them. Pages can not be reclaimed by the writer until no more transactions -// are using them. A long running read transaction can cause the database to -// quickly grow. -type Tx struct { - writable bool - managed bool - db *DB - meta *meta - root Bucket - pages map[pgid]*page - stats TxStats - commitHandlers []func() - - // WriteFlag specifies the flag for write-related methods like WriteTo(). - // Tx opens the database file with the specified flag to copy the data. - // - // By default, the flag is unset, which works well for mostly in-memory - // workloads. For databases that are much larger than available RAM, - // set the flag to syscall.O_DIRECT to avoid trashing the page cache. - WriteFlag int -} - -// init initializes the transaction. -func (tx *Tx) init(db *DB) { - tx.db = db - tx.pages = nil - - // Copy the meta page since it can be changed by the writer. - tx.meta = &meta{} - db.meta().copy(tx.meta) - - // Copy over the root bucket. - tx.root = newBucket(tx) - tx.root.bucket = &bucket{} - *tx.root.bucket = tx.meta.root - - // Increment the transaction id and add a page cache for writable transactions. - if tx.writable { - tx.pages = make(map[pgid]*page) - tx.meta.txid += txid(1) - } -} - -// ID returns the transaction id. -func (tx *Tx) ID() int { - return int(tx.meta.txid) -} - -// DB returns a reference to the database that created the transaction. -func (tx *Tx) DB() *DB { - return tx.db -} - -// Size returns current database size in bytes as seen by this transaction. -func (tx *Tx) Size() int64 { - return int64(tx.meta.pgid) * int64(tx.db.pageSize) -} - -// Writable returns whether the transaction can perform write operations. -func (tx *Tx) Writable() bool { - return tx.writable -} - -// Cursor creates a cursor associated with the root bucket. -// All items in the cursor will return a nil value because all root bucket keys point to buckets. -// The cursor is only valid as long as the transaction is open. -// Do not use a cursor after the transaction is closed. -func (tx *Tx) Cursor() *Cursor { - return tx.root.Cursor() -} - -// Stats retrieves a copy of the current transaction statistics. -func (tx *Tx) Stats() TxStats { - return tx.stats -} - -// Bucket retrieves a bucket by name. -// Returns nil if the bucket does not exist. -// The bucket instance is only valid for the lifetime of the transaction. -func (tx *Tx) Bucket(name []byte) *Bucket { - return tx.root.Bucket(name) -} - -// CreateBucket creates a new bucket. -// Returns an error if the bucket already exists, if the bucket name is blank, or if the bucket name is too long. -// The bucket instance is only valid for the lifetime of the transaction. -func (tx *Tx) CreateBucket(name []byte) (*Bucket, error) { - return tx.root.CreateBucket(name) -} - -// CreateBucketIfNotExists creates a new bucket if it doesn't already exist. -// Returns an error if the bucket name is blank, or if the bucket name is too long. -// The bucket instance is only valid for the lifetime of the transaction. -func (tx *Tx) CreateBucketIfNotExists(name []byte) (*Bucket, error) { - return tx.root.CreateBucketIfNotExists(name) -} - -// DeleteBucket deletes a bucket. -// Returns an error if the bucket cannot be found or if the key represents a non-bucket value. -func (tx *Tx) DeleteBucket(name []byte) error { - return tx.root.DeleteBucket(name) -} - -// ForEach executes a function for each bucket in the root. -// If the provided function returns an error then the iteration is stopped and -// the error is returned to the caller. -func (tx *Tx) ForEach(fn func(name []byte, b *Bucket) error) error { - return tx.root.ForEach(func(k, v []byte) error { - return fn(k, tx.root.Bucket(k)) - }) -} - -// OnCommit adds a handler function to be executed after the transaction successfully commits. -func (tx *Tx) OnCommit(fn func()) { - tx.commitHandlers = append(tx.commitHandlers, fn) -} - -// Commit writes all changes to disk and updates the meta page. -// Returns an error if a disk write error occurs, or if Commit is -// called on a read-only transaction. -func (tx *Tx) Commit() error { - _assert(!tx.managed, "managed tx commit not allowed") - if tx.db == nil { - return ErrTxClosed - } else if !tx.writable { - return ErrTxNotWritable - } - - // TODO(benbjohnson): Use vectorized I/O to write out dirty pages. - - // Rebalance nodes which have had deletions. - var startTime = time.Now() - tx.root.rebalance() - if tx.stats.Rebalance > 0 { - tx.stats.RebalanceTime += time.Since(startTime) - } - - // spill data onto dirty pages. - startTime = time.Now() - if err := tx.root.spill(); err != nil { - tx.rollback() - return err - } - tx.stats.SpillTime += time.Since(startTime) - - // Free the old root bucket. - tx.meta.root.root = tx.root.root - - // Free the old freelist because commit writes out a fresh freelist. - if tx.meta.freelist != pgidNoFreelist { - tx.db.freelist.free(tx.meta.txid, tx.db.page(tx.meta.freelist)) - } - - if !tx.db.NoFreelistSync { - err := tx.commitFreelist() - if err != nil { - return err - } - } else { - tx.meta.freelist = pgidNoFreelist - } - - // Write dirty pages to disk. - startTime = time.Now() - if err := tx.write(); err != nil { - tx.rollback() - return err - } - - // If strict mode is enabled then perform a consistency check. - if tx.db.StrictMode { - ch := tx.Check() - var errs []string - for { - err, ok := <-ch - if !ok { - break - } - errs = append(errs, err.Error()) - } - if len(errs) > 0 { - panic("check fail: " + strings.Join(errs, "\n")) - } - } - - // Write meta to disk. - if err := tx.writeMeta(); err != nil { - tx.rollback() - return err - } - tx.stats.WriteTime += time.Since(startTime) - - // Finalize the transaction. - tx.close() - - // Execute commit handlers now that the locks have been removed. - for _, fn := range tx.commitHandlers { - fn() - } - - return nil -} - -func (tx *Tx) commitFreelist() error { - // Allocate new pages for the new free list. This will overestimate - // the size of the freelist but not underestimate the size (which would be bad). - opgid := tx.meta.pgid - p, err := tx.allocate((tx.db.freelist.size() / tx.db.pageSize) + 1) - if err != nil { - tx.rollback() - return err - } - if err := tx.db.freelist.write(p); err != nil { - tx.rollback() - return err - } - tx.meta.freelist = p.id - // If the high water mark has moved up then attempt to grow the database. - if tx.meta.pgid > opgid { - if err := tx.db.grow(int(tx.meta.pgid+1) * tx.db.pageSize); err != nil { - tx.rollback() - return err - } - } - - return nil -} - -// Rollback closes the transaction and ignores all previous updates. Read-only -// transactions must be rolled back and not committed. -func (tx *Tx) Rollback() error { - _assert(!tx.managed, "managed tx rollback not allowed") - if tx.db == nil { - return ErrTxClosed - } - tx.nonPhysicalRollback() - return nil -} - -// nonPhysicalRollback is called when user calls Rollback directly, in this case we do not need to reload the free pages from disk. -func (tx *Tx) nonPhysicalRollback() { - if tx.db == nil { - return - } - if tx.writable { - tx.db.freelist.rollback(tx.meta.txid) - } - tx.close() -} - -// rollback needs to reload the free pages from disk in case some system error happens like fsync error. -func (tx *Tx) rollback() { - if tx.db == nil { - return - } - if tx.writable { - tx.db.freelist.rollback(tx.meta.txid) - if !tx.db.hasSyncedFreelist() { - // Reconstruct free page list by scanning the DB to get the whole free page list. - // Note: scaning the whole db is heavy if your db size is large in NoSyncFreeList mode. - tx.db.freelist.noSyncReload(tx.db.freepages()) - } else { - // Read free page list from freelist page. - tx.db.freelist.reload(tx.db.page(tx.db.meta().freelist)) - } - } - tx.close() -} - -func (tx *Tx) close() { - if tx.db == nil { - return - } - if tx.writable { - // Grab freelist stats. - var freelistFreeN = tx.db.freelist.free_count() - var freelistPendingN = tx.db.freelist.pending_count() - var freelistAlloc = tx.db.freelist.size() - - // Remove transaction ref & writer lock. - tx.db.rwtx = nil - tx.db.rwlock.Unlock() - - // Merge statistics. - tx.db.statlock.Lock() - tx.db.stats.FreePageN = freelistFreeN - tx.db.stats.PendingPageN = freelistPendingN - tx.db.stats.FreeAlloc = (freelistFreeN + freelistPendingN) * tx.db.pageSize - tx.db.stats.FreelistInuse = freelistAlloc - tx.db.stats.TxStats.add(&tx.stats) - tx.db.statlock.Unlock() - } else { - tx.db.removeTx(tx) - } - - // Clear all references. - tx.db = nil - tx.meta = nil - tx.root = Bucket{tx: tx} - tx.pages = nil -} - -// Copy writes the entire database to a writer. -// This function exists for backwards compatibility. -// -// Deprecated; Use WriteTo() instead. -func (tx *Tx) Copy(w io.Writer) error { - _, err := tx.WriteTo(w) - return err -} - -// WriteTo writes the entire database to a writer. -// If err == nil then exactly tx.Size() bytes will be written into the writer. -func (tx *Tx) WriteTo(w io.Writer) (n int64, err error) { - // Attempt to open reader with WriteFlag - f, err := tx.db.openFile(tx.db.path, os.O_RDONLY|tx.WriteFlag, 0) - if err != nil { - return 0, err - } - defer func() { - if cerr := f.Close(); err == nil { - err = cerr - } - }() - - // Generate a meta page. We use the same page data for both meta pages. - buf := make([]byte, tx.db.pageSize) - page := (*page)(unsafe.Pointer(&buf[0])) - page.flags = metaPageFlag - *page.meta() = *tx.meta - - // Write meta 0. - page.id = 0 - page.meta().checksum = page.meta().sum64() - nn, err := w.Write(buf) - n += int64(nn) - if err != nil { - return n, fmt.Errorf("meta 0 copy: %s", err) - } - - // Write meta 1 with a lower transaction id. - page.id = 1 - page.meta().txid -= 1 - page.meta().checksum = page.meta().sum64() - nn, err = w.Write(buf) - n += int64(nn) - if err != nil { - return n, fmt.Errorf("meta 1 copy: %s", err) - } - - // Move past the meta pages in the file. - if _, err := f.Seek(int64(tx.db.pageSize*2), io.SeekStart); err != nil { - return n, fmt.Errorf("seek: %s", err) - } - - // Copy data pages. - wn, err := io.CopyN(w, f, tx.Size()-int64(tx.db.pageSize*2)) - n += wn - if err != nil { - return n, err - } - - return n, nil -} - -// CopyFile copies the entire database to file at the given path. -// A reader transaction is maintained during the copy so it is safe to continue -// using the database while a copy is in progress. -func (tx *Tx) CopyFile(path string, mode os.FileMode) error { - f, err := tx.db.openFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, mode) - if err != nil { - return err - } - - _, err = tx.WriteTo(f) - if err != nil { - _ = f.Close() - return err - } - return f.Close() -} - -// Check performs several consistency checks on the database for this transaction. -// An error is returned if any inconsistency is found. -// -// It can be safely run concurrently on a writable transaction. However, this -// incurs a high cost for large databases and databases with a lot of subbuckets -// because of caching. This overhead can be removed if running on a read-only -// transaction, however, it is not safe to execute other writer transactions at -// the same time. -func (tx *Tx) Check() <-chan error { - ch := make(chan error) - go tx.check(ch) - return ch -} - -func (tx *Tx) check(ch chan error) { - // Force loading free list if opened in ReadOnly mode. - tx.db.loadFreelist() - - // Check if any pages are double freed. - freed := make(map[pgid]bool) - all := make([]pgid, tx.db.freelist.count()) - tx.db.freelist.copyall(all) - for _, id := range all { - if freed[id] { - ch <- fmt.Errorf("page %d: already freed", id) - } - freed[id] = true - } - - // Track every reachable page. - reachable := make(map[pgid]*page) - reachable[0] = tx.page(0) // meta0 - reachable[1] = tx.page(1) // meta1 - if tx.meta.freelist != pgidNoFreelist { - for i := uint32(0); i <= tx.page(tx.meta.freelist).overflow; i++ { - reachable[tx.meta.freelist+pgid(i)] = tx.page(tx.meta.freelist) - } - } - - // Recursively check buckets. - tx.checkBucket(&tx.root, reachable, freed, ch) - - // Ensure all pages below high water mark are either reachable or freed. - for i := pgid(0); i < tx.meta.pgid; i++ { - _, isReachable := reachable[i] - if !isReachable && !freed[i] { - ch <- fmt.Errorf("page %d: unreachable unfreed", int(i)) - } - } - - // Close the channel to signal completion. - close(ch) -} - -func (tx *Tx) checkBucket(b *Bucket, reachable map[pgid]*page, freed map[pgid]bool, ch chan error) { - // Ignore inline buckets. - if b.root == 0 { - return - } - - // Check every page used by this bucket. - b.tx.forEachPage(b.root, 0, func(p *page, _ int) { - if p.id > tx.meta.pgid { - ch <- fmt.Errorf("page %d: out of bounds: %d", int(p.id), int(b.tx.meta.pgid)) - } - - // Ensure each page is only referenced once. - for i := pgid(0); i <= pgid(p.overflow); i++ { - var id = p.id + i - if _, ok := reachable[id]; ok { - ch <- fmt.Errorf("page %d: multiple references", int(id)) - } - reachable[id] = p - } - - // We should only encounter un-freed leaf and branch pages. - if freed[p.id] { - ch <- fmt.Errorf("page %d: reachable freed", int(p.id)) - } else if (p.flags&branchPageFlag) == 0 && (p.flags&leafPageFlag) == 0 { - ch <- fmt.Errorf("page %d: invalid type: %s", int(p.id), p.typ()) - } - }) - - // Check each bucket within this bucket. - _ = b.ForEach(func(k, v []byte) error { - if child := b.Bucket(k); child != nil { - tx.checkBucket(child, reachable, freed, ch) - } - return nil - }) -} - -// allocate returns a contiguous block of memory starting at a given page. -func (tx *Tx) allocate(count int) (*page, error) { - p, err := tx.db.allocate(tx.meta.txid, count) - if err != nil { - return nil, err - } - - // Save to our page cache. - tx.pages[p.id] = p - - // Update statistics. - tx.stats.PageCount += count - tx.stats.PageAlloc += count * tx.db.pageSize - - return p, nil -} - -// write writes any dirty pages to disk. -func (tx *Tx) write() error { - // Sort pages by id. - pages := make(pages, 0, len(tx.pages)) - for _, p := range tx.pages { - pages = append(pages, p) - } - // Clear out page cache early. - tx.pages = make(map[pgid]*page) - sort.Sort(pages) - - // Write pages to disk in order. - for _, p := range pages { - rem := (uint64(p.overflow) + 1) * uint64(tx.db.pageSize) - offset := int64(p.id) * int64(tx.db.pageSize) - var written uintptr - - // Write out page in "max allocation" sized chunks. - for { - sz := rem - if sz > maxAllocSize-1 { - sz = maxAllocSize - 1 - } - buf := unsafeByteSlice(unsafe.Pointer(p), written, 0, int(sz)) - - if _, err := tx.db.ops.writeAt(buf, offset); err != nil { - return err - } - - // Update statistics. - tx.stats.Write++ - - // Exit inner for loop if we've written all the chunks. - rem -= sz - if rem == 0 { - break - } - - // Otherwise move offset forward and move pointer to next chunk. - offset += int64(sz) - written += uintptr(sz) - } - } - - // Ignore file sync if flag is set on DB. - if !tx.db.NoSync || IgnoreNoSync { - if err := fdatasync(tx.db); err != nil { - return err - } - } - - // Put small pages back to page pool. - for _, p := range pages { - // Ignore page sizes over 1 page. - // These are allocated using make() instead of the page pool. - if int(p.overflow) != 0 { - continue - } - - buf := unsafeByteSlice(unsafe.Pointer(p), 0, 0, tx.db.pageSize) - - // See https://go.googlesource.com/go/+/f03c9202c43e0abb130669852082117ca50aa9b1 - for i := range buf { - buf[i] = 0 - } - tx.db.pagePool.Put(buf) - } - - return nil -} - -// writeMeta writes the meta to the disk. -func (tx *Tx) writeMeta() error { - // Create a temporary buffer for the meta page. - buf := make([]byte, tx.db.pageSize) - p := tx.db.pageInBuffer(buf, 0) - tx.meta.write(p) - - // Write the meta page to file. - if _, err := tx.db.ops.writeAt(buf, int64(p.id)*int64(tx.db.pageSize)); err != nil { - return err - } - if !tx.db.NoSync || IgnoreNoSync { - if err := fdatasync(tx.db); err != nil { - return err - } - } - - // Update statistics. - tx.stats.Write++ - - return nil -} - -// page returns a reference to the page with a given id. -// If page has been written to then a temporary buffered page is returned. -func (tx *Tx) page(id pgid) *page { - // Check the dirty pages first. - if tx.pages != nil { - if p, ok := tx.pages[id]; ok { - return p - } - } - - // Otherwise return directly from the mmap. - return tx.db.page(id) -} - -// forEachPage iterates over every page within a given page and executes a function. -func (tx *Tx) forEachPage(pgid pgid, depth int, fn func(*page, int)) { - p := tx.page(pgid) - - // Execute function. - fn(p, depth) - - // Recursively loop over children. - if (p.flags & branchPageFlag) != 0 { - for i := 0; i < int(p.count); i++ { - elem := p.branchPageElement(uint16(i)) - tx.forEachPage(elem.pgid, depth+1, fn) - } - } -} - -// Page returns page information for a given page number. -// This is only safe for concurrent use when used by a writable transaction. -func (tx *Tx) Page(id int) (*PageInfo, error) { - if tx.db == nil { - return nil, ErrTxClosed - } else if pgid(id) >= tx.meta.pgid { - return nil, nil - } - - // Build the page info. - p := tx.db.page(pgid(id)) - info := &PageInfo{ - ID: id, - Count: int(p.count), - OverflowCount: int(p.overflow), - } - - // Determine the type (or if it's free). - if tx.db.freelist.freed(pgid(id)) { - info.Type = "free" - } else { - info.Type = p.typ() - } - - return info, nil -} - -// TxStats represents statistics about the actions performed by the transaction. -type TxStats struct { - // Page statistics. - PageCount int // number of page allocations - PageAlloc int // total bytes allocated - - // Cursor statistics. - CursorCount int // number of cursors created - - // Node statistics - NodeCount int // number of node allocations - NodeDeref int // number of node dereferences - - // Rebalance statistics. - Rebalance int // number of node rebalances - RebalanceTime time.Duration // total time spent rebalancing - - // Split/Spill statistics. - Split int // number of nodes split - Spill int // number of nodes spilled - SpillTime time.Duration // total time spent spilling - - // Write statistics. - Write int // number of writes performed - WriteTime time.Duration // total time spent writing to disk -} - -func (s *TxStats) add(other *TxStats) { - s.PageCount += other.PageCount - s.PageAlloc += other.PageAlloc - s.CursorCount += other.CursorCount - s.NodeCount += other.NodeCount - s.NodeDeref += other.NodeDeref - s.Rebalance += other.Rebalance - s.RebalanceTime += other.RebalanceTime - s.Split += other.Split - s.Spill += other.Spill - s.SpillTime += other.SpillTime - s.Write += other.Write - s.WriteTime += other.WriteTime -} - -// Sub calculates and returns the difference between two sets of transaction stats. -// This is useful when obtaining stats at two different points and time and -// you need the performance counters that occurred within that time span. -func (s *TxStats) Sub(other *TxStats) TxStats { - var diff TxStats - diff.PageCount = s.PageCount - other.PageCount - diff.PageAlloc = s.PageAlloc - other.PageAlloc - diff.CursorCount = s.CursorCount - other.CursorCount - diff.NodeCount = s.NodeCount - other.NodeCount - diff.NodeDeref = s.NodeDeref - other.NodeDeref - diff.Rebalance = s.Rebalance - other.Rebalance - diff.RebalanceTime = s.RebalanceTime - other.RebalanceTime - diff.Split = s.Split - other.Split - diff.Spill = s.Spill - other.Spill - diff.SpillTime = s.SpillTime - other.SpillTime - diff.Write = s.Write - other.Write - diff.WriteTime = s.WriteTime - other.WriteTime - return diff -} diff --git a/vendor/go.etcd.io/bbolt/unsafe.go b/vendor/go.etcd.io/bbolt/unsafe.go deleted file mode 100644 index c0e50375..00000000 --- a/vendor/go.etcd.io/bbolt/unsafe.go +++ /dev/null @@ -1,39 +0,0 @@ -package bbolt - -import ( - "reflect" - "unsafe" -) - -func unsafeAdd(base unsafe.Pointer, offset uintptr) unsafe.Pointer { - return unsafe.Pointer(uintptr(base) + offset) -} - -func unsafeIndex(base unsafe.Pointer, offset uintptr, elemsz uintptr, n int) unsafe.Pointer { - return unsafe.Pointer(uintptr(base) + offset + uintptr(n)*elemsz) -} - -func unsafeByteSlice(base unsafe.Pointer, offset uintptr, i, j int) []byte { - // See: https://github.com/golang/go/wiki/cgo#turning-c-arrays-into-go-slices - // - // This memory is not allocated from C, but it is unmanaged by Go's - // garbage collector and should behave similarly, and the compiler - // should produce similar code. Note that this conversion allows a - // subslice to begin after the base address, with an optional offset, - // while the URL above does not cover this case and only slices from - // index 0. However, the wiki never says that the address must be to - // the beginning of a C allocation (or even that malloc was used at - // all), so this is believed to be correct. - return (*[maxAllocSize]byte)(unsafeAdd(base, offset))[i:j:j] -} - -// unsafeSlice modifies the data, len, and cap of a slice variable pointed to by -// the slice parameter. This helper should be used over other direct -// manipulation of reflect.SliceHeader to prevent misuse, namely, converting -// from reflect.SliceHeader to a Go slice type. -func unsafeSlice(slice, data unsafe.Pointer, len int) { - s := (*reflect.SliceHeader)(slice) - s.Data = uintptr(data) - s.Cap = len - s.Len = len -} diff --git a/vendor/modules.txt b/vendor/modules.txt index 165c9480..62cd6662 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -1,9 +1,6 @@ # github.com/TwiN/g8 v1.3.0 ## explicit; go 1.17 github.com/TwiN/g8 -# github.com/TwiN/gocache v1.2.4 -## explicit; go 1.16 -github.com/TwiN/gocache # github.com/TwiN/gocache/v2 v2.0.0 ## explicit; go 1.17 github.com/TwiN/gocache/v2 @@ -84,9 +81,6 @@ github.com/wcharczuk/go-chart/v2 github.com/wcharczuk/go-chart/v2/drawing github.com/wcharczuk/go-chart/v2/matrix github.com/wcharczuk/go-chart/v2/roboto -# go.etcd.io/bbolt v1.3.6 -## explicit; go 1.12 -go.etcd.io/bbolt # golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 ## explicit; go 1.11 golang.org/x/crypto/bcrypt