add SubscribeLocalMetadata without checking persisted meta logs

weed/server/filer_grpc_server_sub_meta.go

@@ -48,6 +48,32 @@ func (fs *FilerServer) SubscribeMetadata(req *filer_pb.SubscribeMetadataRequest,
 
 }
 
+func (fs *FilerServer) SubscribeLocalMetadata(req *filer_pb.SubscribeMetadataRequest, stream filer_pb.SeaweedFiler_SubscribeLocalMetadataServer) error {
+
+	peerAddress := findClientAddress(stream.Context(), 0)
+
+	clientName := fs.addClient(req.ClientName, peerAddress)
+
+	defer fs.deleteClient(clientName)
+
+	lastReadTime := time.Unix(0, req.SinceNs)
+	glog.V(0).Infof(" %v local subscribe %s from %+v", clientName, req.PathPrefix, lastReadTime)
+
+	eachEventNotificationFn := eachEventNotificationFn(req, stream, clientName)
+
+	eachLogEntryFn := eachLogEntryFn(eachEventNotificationFn)
+
+	err := fs.filer.MetaLogBuffer.LoopProcessLogData(lastReadTime, func() bool {
+		fs.listenersLock.Lock()
+		fs.listenersCond.Wait()
+		fs.listenersLock.Unlock()
+		return true
+	}, eachLogEntryFn)
+
+	return err
+
+}
+
 func eachLogEntryFn(eachEventNotificationFn func(dirPath string, eventNotification *filer_pb.EventNotification, tsNs int64) error) func(logEntry *filer_pb.LogEntry) error {
 	return func(logEntry *filer_pb.LogEntry) error {
 		event := &filer_pb.SubscribeMetadataResponse{}