package filer2 import ( "context" "fmt" "time" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/master_pb" "github.com/chrislusf/seaweedfs/weed/util" ) func (fs *Filer) GetMaster() string { return fs.currentMaster } func (fs *Filer) KeepConnectedToMaster() { glog.V(0).Infof("Filer bootstraps with masters %v", fs.masters) for _, master := range fs.masters { glog.V(0).Infof("Connecting to %v", master) withMasterClient(master, func(client master_pb.SeaweedClient) error { stream, err := client.KeepConnected(context.Background()) if err != nil { glog.V(0).Infof("failed to keep connected to %s: %v", master, err) return err } glog.V(0).Infof("Connected to %v", master) fs.currentMaster = master for { time.Sleep(time.Duration(float32(10*1e3)*0.25) * time.Millisecond) if err = stream.Send(&master_pb.Empty{}); err != nil { glog.V(0).Infof("failed to send to %s: %v", master, err) return err } if _, err = stream.Recv(); err != nil { glog.V(0).Infof("failed to receive from %s: %v", master, err) return err } } }) fs.currentMaster = "" } } func withMasterClient(master string, fn func(client master_pb.SeaweedClient) error) error { grpcConnection, err := util.GrpcDial(master) if err != nil { return fmt.Errorf("fail to dial %s: %v", master, err) } defer grpcConnection.Close() client := master_pb.NewSeaweedClient(grpcConnection) return fn(client) }