英文:
grpc service does not implement reflection.GRPCServer
问题
我正在创建一个使用Go语言的gRPC服务，我设置了以下的gRPC配置：
func setupGrpc() {lis, err := net.Listen("tcp", ":9000")if err != nil {log.Fatalf("failed to listen: %v", err)}s := followerservice.UserServer{}grpcServer := grpc.NewServer()gen.RegisterUserServiceServer(grpcServer, &s)// 为了方便命令行开发reflection.Register(s) // 这行代码不起作用！if err := grpcServer.Serve(lis); err != nil {log.Fatalf("failed to serve: %s", err)}}
我的UserServer代码如下：
type UserServer struct {gen.UnimplementedUserServiceServer}func (s *UserServer) Create(ctx context.Context, in *gen.CreateUserRequest) (*gen.CreateUserResponse, error) {log.Printf("从客户端接收到消息体：%s", in.Email)return &gen.CreateUserResponse{Id: "新的ID！"}, nil}
在func setupGrpc()中标记的那一行，我得到了一个编译时错误：
followerservice.UserServer没有实现reflection.GRPCServer（缺少GetServiceInfo方法）
但是我找不到如何实现它，我已经搜索了几个小时了。感觉像是protoc可以为我生成这个方法，但我有点困惑。
英文:
I am creating a grpc service in go, I set up my grpc as follows
func setupGrpc() {lis, err := net.Listen("tcp", ":9000")if err != nil {log.Fatalf("failed to listen: %v", err)}s := followerservice.UserServer{}grpcServer := grpc.NewServer()gen.RegisterUserServiceServer(grpcServer, &s)// for ease of cli devreflection.Register(s) // this doesn't work!if err := grpcServer.Serve(lis); err != nil {log.Fatalf("failed to serve: %s", err)}}
My UserServer looks like this
type UserServer struct {gen.UnimplementedUserServiceServer}func (s *UserServer) Create(ctx context.Context, in *gen.CreateUserRequest)(*gen.CreateUserResponse, error) {log.Printf("Receive message body from client: %s", in.Email)return &gen.CreateUserResponse{Id: "new id!"}, nil}
At the line marked in func setupGrpc() I get a compile time error:
> followerservice.UserServer does not implement reflection.GRPCServer (missing GetServiceInfo method)
but I can't find out how to implement it, I've been googling for hours now. It feels like protoc could generate this for me, but I'm kinda confused.
答案1
得分: 2
你需要对从grpc.NewServer()构造函数获得的*grpc.Server进行reflection.Register注册，而不是你自己的实现。
grpcServer := grpc.NewServer()gen.RegisterUserServiceServer(grpcServer, &s)reflection.Register(grpcServer)
英文:
You have to reflection.Register the *grpc.Server that you got from the grpc.NewServer() constructor, not your own implementation.
grpcServer := grpc.NewServer()gen.RegisterUserServiceServer(grpcServer, &s)reflection.Register(grpcServer)
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