package operation import ( "fmt" "strconv" "strings" "sync" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/master_pb" "github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb" "github.com/chrislusf/seaweedfs/weed/util" "google.golang.org/grpc" ) var ( grpcClients = make(map[string]*grpc.ClientConn) grpcClientsLock sync.Mutex ) func WithVolumeServerClient(volumeServer string, fn func(volume_server_pb.VolumeServerClient) error) error { grpcAddress, err := toVolumeServerGrpcAddress(volumeServer) if err != nil { return err } grpcClientsLock.Lock() existingConnection, found := grpcClients[grpcAddress] if found { grpcClientsLock.Unlock() client := volume_server_pb.NewVolumeServerClient(existingConnection) return fn(client) } grpcConnection, err := util.GrpcDial(grpcAddress) if err != nil { grpcClientsLock.Unlock() return fmt.Errorf("fail to dial %s: %v", grpcAddress, err) } grpcClients[grpcAddress] = grpcConnection grpcClientsLock.Unlock() client := volume_server_pb.NewVolumeServerClient(grpcConnection) return fn(client) } func toVolumeServerGrpcAddress(volumeServer string) (grpcAddress string, err error) { sepIndex := strings.LastIndex(volumeServer, ":") port, err := strconv.Atoi(volumeServer[sepIndex+1:]) if err != nil { glog.Errorf("failed to parse volume server address: %v", volumeServer) return "", err } return fmt.Sprintf("%s:%d", volumeServer[0:sepIndex], port+10000), nil } func withMasterServerClient(masterServer string, fn func(masterClient master_pb.SeaweedClient) error) error { grpcClientsLock.Lock() existingConnection, found := grpcClients[masterServer] if found { grpcClientsLock.Unlock() client := master_pb.NewSeaweedClient(existingConnection) return fn(client) } grpcConnection, err := util.GrpcDial(masterServer) if err != nil { grpcClientsLock.Unlock() return fmt.Errorf("fail to dial %s: %v", masterServer, err) } grpcClients[masterServer] = grpcConnection grpcClientsLock.Unlock() client := master_pb.NewSeaweedClient(grpcConnection) return fn(client) }