forked from extern/smegmesh
129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
package sync
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import (
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"context"
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"io"
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"time"
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"github.com/tim-beatham/smegmesh/pkg/conf"
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"github.com/tim-beatham/smegmesh/pkg/conn"
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logging "github.com/tim-beatham/smegmesh/pkg/log"
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"github.com/tim-beatham/smegmesh/pkg/mesh"
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"github.com/tim-beatham/smegmesh/pkg/rpc"
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)
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// SyncRequester: coordinates the syncing of meshes
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type SyncRequester interface {
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SyncMesh(mesh mesh.MeshProvider, meshNode mesh.MeshNode) error
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}
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type SyncRequesterImpl struct {
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manager mesh.MeshManager
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connectionManager conn.ConnectionManager
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configuration *conf.DaemonConfiguration
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errorHdlr SyncErrorHandler
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}
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// handleErr: handleGrpc errors
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func (s *SyncRequesterImpl) handleErr(mesh mesh.MeshProvider, pubKey string, err error) error {
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ok := s.errorHdlr.Handle(mesh, pubKey, err)
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if ok {
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return nil
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}
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return err
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}
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// SyncMesh: Proactively send a sync request to the other mesh
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func (s *SyncRequesterImpl) SyncMesh(mesh mesh.MeshProvider, meshNode mesh.MeshNode) error {
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endpoint := meshNode.GetHostEndpoint()
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pubKey, _ := meshNode.GetPublicKey()
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peerConnection, err := s.connectionManager.GetConnection(endpoint)
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if err != nil {
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return err
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}
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client, err := peerConnection.GetClient()
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if err != nil {
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return err
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}
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c := rpc.NewSyncServiceClient(client)
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syncTimeOut := float64(s.configuration.SyncInterval) * float64(time.Second)
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ctx, cancel := context.WithTimeout(context.Background(), time.Duration(syncTimeOut))
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defer cancel()
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err = s.syncMesh(mesh, ctx, c)
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if err != nil {
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s.handleErr(mesh, pubKey.String(), err)
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}
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logging.Log.WriteInfof("synced with node: %s meshId: %s\n", endpoint, mesh.GetMeshId())
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return err
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}
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func (s *SyncRequesterImpl) syncMesh(mesh mesh.MeshProvider, ctx context.Context, client rpc.SyncServiceClient) error {
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stream, err := client.SyncMesh(ctx)
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syncer := mesh.GetSyncer()
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if err != nil {
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return err
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}
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for {
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msg, moreMessages := syncer.GenerateMessage()
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err := stream.Send(&rpc.SyncMeshRequest{MeshId: mesh.GetMeshId(), Changes: msg})
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if err != nil {
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return err
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}
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in, err := stream.Recv()
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if err != nil && err != io.EOF {
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logging.Log.WriteInfof("stream recv error: %s\n", err.Error())
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return err
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}
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if err != io.EOF && len(in.Changes) != 0 {
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err = syncer.RecvMessage(in.Changes)
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}
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if err != nil {
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logging.Log.WriteInfof("syncer recv error: %s\n", err.Error())
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return err
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}
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if !moreMessages {
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break
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}
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}
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syncer.Complete()
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stream.CloseSend()
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return nil
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}
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type NewSyncRequesterParams struct {
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MeshManager mesh.MeshManager
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ConnectionManager conn.ConnectionManager
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Configuration *conf.DaemonConfiguration
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}
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func NewSyncRequester(params NewSyncRequesterParams) SyncRequester {
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errorHdlr := NewSyncErrorHandler(params.MeshManager, params.ConnectionManager)
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return &SyncRequesterImpl{manager: params.MeshManager,
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connectionManager: params.ConnectionManager,
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configuration: params.Configuration,
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errorHdlr: errorHdlr,
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}
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}
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