filer: able to tail meta data changes

1 files changed, 17 insertions, 2 deletions

diff --git a/weed/operation/grpc_client.go b/weed/operation/grpc_client.go
index dccf85da4..025a65b38 100644
--- a/weed/operation/grpc_client.go
+++ b/weed/operation/grpc_client.go
@@ -9,6 +9,7 @@ import (
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
 )
@@ -17,7 +18,7 @@ func WithVolumeServerClient(volumeServer string, grpcDialOption grpc.DialOption,
 
 	grpcAddress, err := toVolumeServerGrpcAddress(volumeServer)
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to parse volume server %v: %v", volumeServer, err)
 	}
 
 	return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
@@ -41,7 +42,7 @@ func WithMasterServerClient(masterServer string, grpcDialOption grpc.DialOption,
 
 	masterGrpcAddress, parseErr := pb.ParseServerToGrpcAddress(masterServer)
 	if parseErr != nil {
-		return fmt.Errorf("failed to parse master grpc %v: %v", masterServer, parseErr)
+		return fmt.Errorf("failed to parse master %v: %v", masterServer, parseErr)
 	}
 
 	return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
@@ -50,3 +51,17 @@ func WithMasterServerClient(masterServer string, grpcDialOption grpc.DialOption,
 	}, masterGrpcAddress, grpcDialOption)
 
 }
+
+func WithFilerServerClient(filerServer string, grpcDialOption grpc.DialOption, fn func(masterClient filer_pb.SeaweedFilerClient) error) error {
+
+	filerGrpcAddress, parseErr := pb.ParseServerToGrpcAddress(filerServer)
+	if parseErr != nil {
+		return fmt.Errorf("failed to parse filer %v: %v", filerGrpcAddress, parseErr)
+	}
+
+	return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
+		client := filer_pb.NewSeaweedFilerClient(grpcConnection)
+		return fn(client)
+	}, filerGrpcAddress, grpcDialOption)
+
+}