able to read chan and write chan

weed/server/filer_grpc_server.go

@@ -390,8 +390,12 @@ func (fs *FilerServer) KeepConnected(stream filer_pb.SeaweedFiler_KeepConnectedS
 	}
 
 	clientName := fmt.Sprintf("%s:%d", req.Name, req.GrpcPort)
+	m := make(map[string]bool)
+	for _, tp := range req.Resources {
+		m[tp] = true
+	}
 	fs.brokersLock.Lock()
-	fs.brokers[clientName] = true
+	fs.brokers[clientName] = m
 	glog.V(0).Infof("+ broker %v", clientName)
 	fs.brokersLock.Unlock()
 
@@ -417,3 +421,35 @@ func (fs *FilerServer) KeepConnected(stream filer_pb.SeaweedFiler_KeepConnectedS
 	}
 
 }
+
+func (fs *FilerServer) LocateBroker(ctx context.Context, req *filer_pb.LocateBrokerRequest) (resp *filer_pb.LocateBrokerResponse, err error) {
+
+	resp = &filer_pb.LocateBrokerResponse{}
+
+	fs.brokersLock.Lock()
+	defer fs.brokersLock.Unlock()
+
+	var localBrokers []*filer_pb.LocateBrokerResponse_Resource
+
+	for b, m := range fs.brokers {
+		if _, found := m[req.Resource]; found {
+			resp.Found = true
+			resp.Resources = []*filer_pb.LocateBrokerResponse_Resource{
+				{
+					GrpcAddresses: b,
+					ResourceCount: int32(len(m)),
+				},
+			}
+			return
+		}
+		localBrokers = append(localBrokers, &filer_pb.LocateBrokerResponse_Resource{
+			GrpcAddresses: b,
+			ResourceCount: int32(len(m)),
+		})
+	}
+
+	resp.Resources = localBrokers
+
+	return resp, nil
+
+}

weed/server/filer_grpc_server_listen.go

@@ -82,7 +82,7 @@ func (fs *FilerServer) SubscribeMetadata(req *filer_pb.SubscribeMetadataRequest,
 		lastReadTime = time.Unix(0, processedTsNs)
 	}
 
-	_, err := fs.filer.MetaLogBuffer.LoopProcessLogData(lastReadTime, func() bool {
+	err := fs.filer.MetaLogBuffer.LoopProcessLogData(lastReadTime, func() bool {
 		fs.listenersLock.Lock()
 		fs.listenersCond.Wait()
 		fs.listenersLock.Unlock()

weed/server/filer_server.go

@@ -64,7 +64,7 @@ type FilerServer struct {
 	listenersLock sync.Mutex
 	listenersCond *sync.Cond
 
-	brokers     map[string]bool
+	brokers     map[string]map[string]bool
 	brokersLock sync.Mutex
 }
 
@@ -73,7 +73,7 @@ func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption)
 	fs = &FilerServer{
 		option:         option,
 		grpcDialOption: security.LoadClientTLS(util.GetViper(), "grpc.filer"),
-		brokers:        make(map[string]bool),
+		brokers:        make(map[string]map[string]bool),
 	}
 	fs.listenersCond = sync.NewCond(&fs.listenersLock)