writing meta logs is working

weed/server/filer_server.go

@@ -5,11 +5,13 @@ import (
 	"fmt"
 	"net/http"
 	"os"
+	"sync"
 	"time"
 
 	"google.golang.org/grpc"
 
 	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/stats"
 	"github.com/chrislusf/seaweedfs/weed/util"
@@ -52,6 +54,11 @@ type FilerServer struct {
 	secret         security.SigningKey
 	filer          *filer2.Filer
 	grpcDialOption grpc.DialOption
+
+	// notifying clients
+	clientChansLock sync.RWMutex
+	clientChans     map[string]chan *filer_pb.FullEventNotification
+
 }
 
 func NewFilerServer(defaultMux, readonlyMux *http.ServeMux, option *FilerOption) (fs *FilerServer, err error) {