实现跨语言通信的便捷之道：RPC在Java和Go中的使用案例

// Java 服务端代码
public class GreeterImpl implements Greeter {
    @Override
    public String greet(String name) {
        return "Hello, " + name + "!";
    }
}
 
// Java 客户端代码
public class GreeterClient {
    private final GreeterBlockingStub stub;
 
    public GreeterClient(String host, int port) {
        ManagedChannel channel = ManagedChannelBuilder.forAddress(host, port)
            .usePlaintext()
            .build();
        stub = GreeterGrpc.newBlockingStub(channel);
    }
 
    public String greet(String name) {
        HelloRequest request = HelloRequest.newBuilder().setName(name).build();
        HelloResponse response = stub.sayHello(request);
        return response.getMessage();
    }
}

// Go 服务端代码
type Greeter struct {}
 
func (g *Greeter) Greet(ctx context.Context, request *pb.HelloRequest) (*pb.HelloResponse, error) {
    return &pb.HelloResponse{Message: "Hello, " + request.Name + "!"}, nil
}
 
// Go 客户端代码
func Greet(c pb.GreeterClient, name string) (string, error) {
    response, err := c.SayHello(context.Background(), &pb.HelloRequest{Name: name})
    if err != nil {
        return "", err
    }
    return response.Message, nil
}

这两个代码示例展示了如何在Java和Go语言中实现gRPC服务端和客户端。Java服务端实现了RPC接口，Go服务端和客户端使用protobuf定义了序列化的消息格式，并实现了相应的服务调用。这为跨语言的分布式系统通信提供了一个简洁的实践案例。