grpc: 非导出方法，并且在不同的包中定义

huangapple
go评论145阅读模式
英文:

grpc: non-exported method and is defined in a different package

问题

更新：看起来这是一个Goland的问题。

找到了使用grpc一元调用的示例。

由于某种原因，无法实现Server结构体，你知道我为什么会得到这个错误吗：

  1. Cannot use '&Server{}' (type *Server) as the type GreetServiceServer Type cannot implement 'GreetServiceServer' as it has a non-exported method and is defined in a different package

main.go

  1. package main
  3. import (
  4. 	"context"
  5. 	"log"
  6. 	"net"
  8. 	greetpb "example.com/s1/pb"
  9. 	"google.golang.org/grpc"
  10. )
  12. type Server struct {
  13. 	greetpb.UnimplementedGreetServiceServer
  14. }
  16. func (*Server) mustEmbedUnimplementedGreetServiceServer() {
  17. 	//TODO implement me
  18. 	panic("implement me")
  19. }
  21. // Greet greets with FirstName
  22. func (*Server) Greet(ctx context.Context, in *greetpb.GreetRequest) (*greetpb.GreetResponse, error) {
  23. 	result := "Hello " + in.GetGreeting().GetFirstName()
  24. 	res := greetpb.GreetResponse{
  25. 		Result: result,
  26. 	}
  27. 	return &res, nil
  28. }
  30. func main() {
  31. 	lis, err := net.Listen("tcp", "0.0.0.0:50051")
  32. 	if err != nil {
  33. 		log.Fatalf("Failed to listen %v", err)
  34. 	}
  36. 	s := grpc.NewServer()
  37. 	greetpb.RegisterGreetServiceServer(s, &Server{})
  39. 	if err := s.Serve(lis); err != nil {
  40. 		log.Fatalf("Failed to start server %v", err)
  41. 	}
  42. }

greet.proto

  1. syntax = "proto3";
  3. package greet;
  4. option go_package="greetpb";
  6. message Greeting {
  7.   string firstName = 1;
  8.   string lastName = 2;
  9. }
  11. message GreetRequest {
  12.   Greeting greeting = 1;
  13. }
  15. message GreetResponse {
  16.   string result = 1;
  17. }
  19. service GreetService{
  20.   rpc Greet(GreetRequest) returns (GreetResponse){};
  21. }
英文:

Update: It looks like it is a Goland issue.

Found this example of using grpc unary.

For some reason, the Server struct can not be implemented, do you know why I am gettign this error:

  1. Cannot use '&Server{}' (type *Server) as the type GreetServiceServer Type cannot implement 'GreetServiceServer' as it has a non-exported method and is defined in a different package

main.go

  1. package main
  3. import (
  4. 	"context"
  5. 	"log"
  6. 	"net"
  8. 	greetpb "example.com/s1/pb"
  9. 	"google.golang.org/grpc"
  10. )
  12. type Server struct {
  13. 	greetpb.UnimplementedGreetServiceServer
  14. }
  16. func (*Server) mustEmbedUnimplementedGreetServiceServer() {
  17. 	//TODO implement me
  18. 	panic("implement me")
  19. }
  21. // Greet greets with FirstName
  22. func (*Server) Greet(ctx context.Context, in *greetpb.GreetRequest) (*greetpb.GreetResponse, error) {
  23. 	result := "Hello " + in.GetGreeting().GetFirstName()
  24. 	res := greetpb.GreetResponse{
  25. 		Result: result,
  26. 	}
  27. 	return &res, nil
  28. }
  30. func main() {
  31. 	lis, err := net.Listen("tcp", "0.0.0.0:50051")
  32. 	if err != nil {
  33. 		log.Fatalf("Failed to listen %v", err)
  34. 	}
  36. 	s := grpc.NewServer()
  37. 	greetpb.RegisterGreetServiceServer(s, &Server{})
  39. 	if err := s.Serve(lis); err != nil {
  40. 		log.Fatalf("Failed to start server %v", err)
  41. 	}
  42. }

greet.proto

  1. syntax = "proto3";
  3. package greet;
  4. option go_package="greetpb";
  6. message Greeting {
  7.   string firstName = 1;
  8.   string lastName = 2;
  9. }
  11. message GreetRequest {
  12.   Greeting greeting = 1;
  13. }
  15. message GreetResponse {
  16.   string result = 1;
  17. }
  19. service GreetService{
  20.   rpc Greet(GreetRequest) returns (GreetResponse){};
  21. }

答案1

得分: 2

如果你在 Goland 中遇到这个问题，只需在 Goland 中删除自动生成的接口实现：

  1. func (*Server) mustEmbedUnimplementedGreetServiceServer() {
  2.     //TODO implement me
  3.     panic("implement me")
  4. }

但你需要定义：

  1. greetpb.UnimplementedGreetServiceServer
英文:

If you encounter this in Goland, just remove auto-generated interface implementation in Goland:

  1. func (*Server) mustEmbedUnimplementedGreetServiceServer() {
  2.     //TODO implement me
  3.     panic("implement me")
  4. }

But you will need to define:

  1. greetpb.UnimplementedGreetServiceServer

huangapple
  • 本文由 发表于 2022年7月2日 21:04:10
  • 转载请务必保留本文链接：https://go.coder-hub.com/72839260.html
  • go
  • grpc
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