springboot创建gRPC客户端

1. maven

   还没有springboot官方的gRPC客户端，使用的是net.devh

<!-- gRPC -->
<dependency>
    <groupId>net.devh</groupId>
    <artifactId>grpc-client-spring-boot-starter</artifactId>
    <version>2.13.1.RELEASE</version>
</dependency>

 

2. application.properties

    dl-server自命名，在后面使用

######################gRPC##################
grpc.client.dl-server.address=static://127.0.0.1:9999
grpc.client.dl-server.enable-keep-alive=true
grpc.client.dl-server.keep-alive-without-calls=true
grpc.client.dl-server.negotiation-type=plaintext

 

3. 将proto文件生成的类放到一个包里

 

 

4. 创建一个服务类

@Service
public class GrpcClientService {

    @GrpcClient("dl-server")
    private PlatformGrpc.PlatformBlockingStub pbStub;
    
    public String send(final String name, String id) {
              
        try {
        
            DlRequest req = DlRequest.newBuilder().setName(name).setId(id).build();      
            DlReply rep = pbStub.getDl(req);
   
            System.out.println(rep.getRes());  
        }catch(StatusRuntimeException sre) {
            
            System.out.println("src-1:"+sre.getMessage());
            System.out.println("src-2:"+sre.getStatus().getCode().name());            
            return "error-src";        
            //no server:UNAVAILABLE  
        }catch(Exception e) {
            
            System.out.println("e---");
            return "error-e";
        }
        
        return "ok";
    }
    
}

 

5. gRPC的代码化配置

@Configuration
public class GrpcClientConfig {

    /**
     * 配置方式一：在application.properties配置
     * 配置方式二，通过init() 
     */
    @PostConstruct
    private void init() {
        
        ManagedChannel mc = ManagedChannelBuilder.forAddress("127.0.0.1", 999).usePlaintext().build();
        
        pbInitStub = PlatformGrpc.newBlockingStub(mc);
    }
}