metrics infrastructure (#128)

controller/metrics/agent.go

@@ -0,0 +1,29 @@
+package metrics
+
+import (
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+)
+
+func Run(cfg *Config) error {
+	logrus.Info("starting")
+	defer logrus.Warn("stopping")
+
+	if cfg.Source == nil {
+		return errors.New("no 'source' configured; exiting")
+	}
+
+	src, ok := cfg.Source.(Source)
+	if !ok {
+		return errors.New("invalid 'source'; exiting")
+	}
+
+	srcJoin, err := src.Start()
+	if err != nil {
+		return errors.Wrap(err, "error starting source")
+	}
+
+	<-srcJoin
+
+	return nil
+}

controller/metrics/cf.go

@@ -0,0 +1,10 @@
+package metrics
+
+import "github.com/michaelquigley/cf"
+
+func GetCfOptions() *cf.Options {
+	opts := cf.DefaultOptions()
+	opts.AddFlexibleSetter("file", loadFileSourceConfig)
+	opts.AddFlexibleSetter("websocket", loadWebsocketSourceConfig)
+	return opts
+}

controller/metrics/config.go

@@ -0,0 +1,5 @@
+package metrics
+
+type Config struct {
+	Source interface{}
+}

controller/metrics/fileSource.go

@@ -0,0 +1,17 @@
+package metrics
+
+import "github.com/michaelquigley/cf"
+
+type FileSourceConfig struct {
+	Path string
+}
+
+func loadFileSourceConfig(v interface{}, opts *cf.Options) (interface{}, error) {
+	return nil, nil
+}
+
+type fileSource struct{}
+
+func (s *fileSource) Start() (chan struct{}, error) {
+	return nil, nil
+}

controller/metrics/model.go

@@ -0,0 +1,10 @@
+package metrics
+
+type Source interface {
+	Start() (chan struct{}, error)
+	Stop()
+}
+
+type Ingester interface {
+	Ingest(msg map[string]interface{})
+}

controller/metrics/websocketSource.go

@@ -0,0 +1,17 @@
+package metrics
+
+import "github.com/michaelquigley/cf"
+
+type WebsocketSourceConfig struct {
+	WebsocketEndpoint string
+}
+
+func loadWebsocketSourceConfig(v interface{}, opts *cf.Options) (interface{}, error) {
+	return nil, nil
+}
+
+type websocketSource struct{}
+
+func (s *websocketSource) Start() (chan struct{}, error) {
+	return nil, nil
+}