refactor into MasterClient

weed/filer2/filer.go

@@ -11,20 +11,20 @@ import (
 	"path/filepath"
 	"strings"
 	"time"
+	"github.com/chrislusf/seaweedfs/weed/wdclient"
+	"context"
 )
 
 type Filer struct {
-	masters        []string
 	store          FilerStore
 	directoryCache *ccache.Cache
-
-	currentMaster string
+	masterClient   *wdclient.MasterClient
 }
 
 func NewFiler(masters []string) *Filer {
 	return &Filer{
-		masters:        masters,
 		directoryCache: ccache.New(ccache.Configure().MaxSize(1000).ItemsToPrune(100)),
+		masterClient:   wdclient.NewMasterClient(context.Background(), "filer", masters),
 	}
 }
 
@@ -36,6 +36,14 @@ func (f *Filer) DisableDirectoryCache() {
 	f.directoryCache = nil
 }
 
+func (fs *Filer) GetMaster() string {
+	return fs.masterClient.GetMaster()
+}
+
+func (fs *Filer) KeepConnectedToMaster() {
+	fs.masterClient.KeepConnectedToMaster()
+}
+
 func (f *Filer) CreateEntry(entry *Entry) error {
 
 	dirParts := strings.Split(string(entry.FullPath), "/")

weed/filer2/filer_master.go → weed/wdclient/masterclient.go

@@ -1,28 +1,44 @@
-package filer2
+package wdclient
 
 import (
 	"context"
+	"time"
 	"fmt"
-	"github.com/chrislusf/seaweedfs/weed/glog"
+
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/util"
-	"time"
+	"github.com/chrislusf/seaweedfs/weed/glog"
 )
 
-func (fs *Filer) GetMaster() string {
-	return fs.currentMaster
+type MasterClient struct {
+	ctx           context.Context
+	name          string
+	currentMaster string
+	masters       []string
+}
+
+func NewMasterClient(ctx context.Context, clientName string, masters []string) *MasterClient {
+	return &MasterClient{
+		ctx:     ctx,
+		name:    clientName,
+		masters: masters,
+	}
+}
+
+func (mc *MasterClient) GetMaster() string {
+	return mc.currentMaster
 }
 
-func (fs *Filer) KeepConnectedToMaster() {
-	glog.V(0).Infof("Filer bootstraps with masters %v", fs.masters)
+func (mc *MasterClient) KeepConnectedToMaster() {
+	glog.V(0).Infof("%s bootstraps with masters %v", mc.name, mc.masters)
 	for {
-		fs.tryAllMasters()
+		mc.tryAllMasters()
 		time.Sleep(time.Second)
 	}
 }
 
-func (fs *Filer) tryAllMasters() {
-	for _, master := range fs.masters {
+func (mc *MasterClient) tryAllMasters() {
+	for _, master := range mc.masters {
 		glog.V(0).Infof("Connecting to %v", master)
 		withMasterClient(master, func(client master_pb.SeaweedClient) error {
 			stream, err := client.KeepConnected(context.Background())
@@ -32,9 +48,9 @@ func (fs *Filer) tryAllMasters() {
 			}
 
 			glog.V(0).Infof("Connected to %v", master)
-			fs.currentMaster = master
+			mc.currentMaster = master
 
-			if err = stream.Send(&master_pb.ClientListenRequest{Name: "filer"}); err != nil {
+			if err = stream.Send(&master_pb.ClientListenRequest{Name: mc.name}); err != nil {
 				glog.V(0).Infof("failed to send to %s: %v", master, err)
 				return err
 			}
@@ -48,7 +64,7 @@ func (fs *Filer) tryAllMasters() {
 				}
 			}
 		})
-		fs.currentMaster = ""
+		mc.currentMaster = ""
 	}
 }
 

weed/wdclient/topolisenter/client_grpc_to_master.go

@@ -1,85 +0,0 @@
-package clusterlistener
-
-import (
-	"context"
-	"fmt"
-	"io"
-
-	"google.golang.org/grpc"
-
-	"code.uber.internal/fraud/alpine/.gen/proto/go/fraud/alpine"
-	"github.com/golang/glog"
-)
-
-func (clusterListener *ClusterListener) establishConnectionWithMaster(
-	master string, msgChan chan *pb.ClusterStatusMessage) error {
-	grpcConnection, err := grpc.Dial(master, grpc.WithInsecure())
-	if err != nil {
-		return fmt.Errorf("%s fail to dial %s: %v", clusterListener.clientName, master, err)
-	}
-	defer func() { _ = grpcConnection.Close() }()
-
-	masterClient := pb.NewAlpineMasterClient(grpcConnection)
-
-	stream, err := masterClient.RegisterClient(context.Background())
-	if err != nil {
-		return fmt.Errorf("%s register client on master %v: %v", clusterListener.clientName, master, err)
-	}
-
-	// TODO possible goroutine leaks if retry happens
-	go func() {
-		for keyspace := range clusterListener.clusters {
-			// glog.V(2).Infof("%s register cluster keyspace(%v) datacenter(%v)", clusterListener.clientName, keyspace, dataCenter)
-			if err := registerForClusterAtMaster(stream, string(keyspace), false, clusterListener.clientName); err != nil {
-				// glog.V(2).Infof("%s register cluster keyspace(%v) datacenter(%v): %v", clusterListener.clientName, keyspace, dataCenter, err)
-				return
-			}
-		}
-
-		for {
-			msg := <-clusterListener.keyspaceFollowMessageChan
-			if err := registerForClusterAtMaster(stream, string(msg.keyspace), msg.isUnfollow, clusterListener.clientName); err != nil {
-				if msg.isUnfollow {
-					glog.V(2).Infof("%s unfollow cluster keyspace(%v): %v", clusterListener.clientName, msg.keyspace, err)
-				} else {
-					glog.V(2).Infof("%s register cluster new keyspace(%v): %v", clusterListener.clientName, msg.keyspace, err)
-				}
-				return
-			}
-		}
-
-	}()
-
-	// glog.V(2).Infof("Reporting allocated %v", as.allocatedResource)
-
-	// glog.V(2).Infof("%s from %s register client to master %s", clusterListener.clientName, dataCenter, master)
-
-	for {
-		msg, err := stream.Recv()
-		if err == io.EOF {
-			// read done.
-			return nil
-		}
-		if err != nil {
-			return fmt.Errorf("client receive topology : %v", err)
-		}
-		msgChan <- msg
-		// glog.V(2).Infof("%s client received message %v", clusterListener.clientName, msg)
-	}
-
-}
-
-func registerForClusterAtMaster(stream pb.AlpineMaster_RegisterClientClient, keyspace string, isUnfollow bool, clientName string) error {
-	clientHeartbeat := &pb.ClientHeartbeat{
-		ClientName: clientName,
-		ClusterFollow: &pb.ClientHeartbeat_ClusterFollowMessage{
-			Keyspace:   keyspace,
-			IsUnfollow: isUnfollow,
-		},
-	}
-
-	if err := stream.Send(clientHeartbeat); err != nil {
-		return fmt.Errorf("%s client send heartbeat: %v", clientName, err)
-	}
-	return nil
-}

weed/wdclient/topolisenter/cluster_listener.go

@@ -1,56 +0,0 @@
-package clusterlistener
-
-import (
-	"context"
-	"sync"
-	"time"
-
-	"code.uber.internal/fraud/alpine/.gen/proto/go/fraud/alpine"
-	"code.uber.internal/fraud/alpine/server/util"
-	"github.com/chrislusf/seaweedfs/weed/storage"
-)
-
-type Location struct {
-	Url       string
-	PublicUrl string
-}
-
-type ClusterListener struct {
-	sync.RWMutex
-	vid2locations map[storage.VolumeId][]*Location
-	clientName    string
-}
-
-func NewClusterListener(clientName string) *ClusterListener {
-	return &ClusterListener{
-		vid2locations: make(map[storage.VolumeId][]*Location),
-		clientName:    clientName,
-	}
-}
-
-// StartListener keeps the listener connected to the master.
-func (clusterListener *ClusterListener) StartListener(ctx context.Context, master string) {
-
-	clusterUpdatesChan := make(chan *pb.ClusterStatusMessage)
-
-	go util.RetryForever(ctx, clusterListener.clientName+" cluster listener", func() error {
-		return clusterListener.establishConnectionWithMaster(master, clusterUpdatesChan)
-	}, 2*time.Second)
-
-	go func() {
-		for {
-			select {
-			case msg := <-clusterUpdatesChan:
-				clusterListener.processClusterStatusMessage(msg)
-			}
-		}
-	}()
-
-	// println("client is connected to master", master, "data center", dataCenter)
-
-	return
-
-}
-
-func (clusterListener *ClusterListener) processClusterStatusMessage(msg *pb.ClusterStatusMessage) {
-}

weed/wdclient/wdclient.go

@@ -2,41 +2,18 @@ package wdclient
 
 import (
 	"context"
-	"code.uber.internal/fraud/alpine/.gen/proto/go/fraud/alpine"
 )
 
 type SeaweedClient struct {
-	ctx             context.Context
-	Master          string
-	ClientName      string
-	ClusterListener *clusterlistener.ClusterListener
+	ctx        context.Context
+	Master     string
+	ClientName string
 }
 
-// NewSeaweedClient creates a SeaweedFS client which contains a listener for the Seaweed system topology changes
-func NewSeaweedClient(ctx context.Context, clientName, master string) *SeaweedClient {
-	c := &SeaweedClient{
-		ctx:             ctx,
-		Master:          master,
-		ClusterListener: clusterlistener.NewClusterListener(clientName),
-		ClientName:      clientName,
-	}
-	c.ClusterListener.StartListener(ctx, c.Master)
+func NewSeaweedClient(ctx context.Context, clientName string, masters []string) *SeaweedClient {
+	return &SeaweedClient{
+		ctx:        ctx,
+		ClientName: clientName,
 
-	conn, err := grpc.Dial(c.Master, grpc.WithInsecure())
-	if err != nil {
-		glog.Fatalf("%s fail to dial %v: %v", c.ClientName, c.Master, err)
 	}
-	c.MasterClient = pb.NewAlpineMasterClient(conn)
-
-	return c
-}
-
-// NewClusterClient create a lightweight client to access a specific cluster
-// TODO The call will block if the keyspace is not created in this data center.
-func (c *SeaweedClient) NewClusterClient(keyspace string) (clusterClient *ClusterClient) {
-
-	return &ClusterClient{
-		keyspace: keyspace,
-	}
-
 }