gRPC Starter

Documentation

Overview

This project provides out-of-the-box, highly scalable Spring Boot starters for the cutting-edge ecosystem of gRPC.

Make the integration of gRPC with Spring Boot feel seamless and native.

Features

Core:

• Dependencies management for gRPC related libraries
• gRPC server autoconfiguration
  • Exception handling
  • Health check
• gRPC client autoconfiguration
  • @Autowired support
  • Dynamic refreshing

Extensions:

• JSON transcoder: A single codebase to simultaneously support both gRPC and HTTP/JSON.
• Protobuf validation: Protobuf message validation implemented by protovalidate/protoc-gen-validate.
• Metric: Spring Boot Actuator integration with gRPC service.
• Tracing: Spring Boot Actuator integration with gRPC server and client.
• Testing: Integration with SpringBootTest.

Quick Start

implementation(platform("io.github.danielliu1123:grpc-starter-dependencies:3.2.5"))
implementation("io.github.danielliu1123:grpc-boot-starter")

From version 3.2.0, the groupId of the project has been changed to io.github.danielliu1123 from com.freemanan.

@SpringBootApplication
public class SimpleApp extends SimpleServiceGrpc.SimpleServiceImplBase {

    public static void main(String[] args) {
        new SpringApplicationBuilder(SimpleApp.class)
                .properties("grpc.client.base-packages=io.grpc")
                .properties("grpc.client.authority=127.0.0.1:9090")
                .run(args);
    }

    @Override
    public void unaryRpc(SimpleRequest request, StreamObserver<SimpleResponse> responseObserver) {
        SimpleResponse response = SimpleResponse.newBuilder()
                .setResponseMessage("Hello " + request.getRequestMessage())
                .build();
        responseObserver.onNext(response);
        responseObserver.onCompleted();
    }

    @Bean
    ApplicationRunner runner(SimpleServiceGrpc.SimpleServiceBlockingStub stub) {
        return args -> {
            SimpleResponse response = stub.unaryRpc(SimpleRequest.newBuilder().setRequestMessage("World!").build());
            System.out.println(response.getResponseMessage());
        };
    }

}

See the example project。

Version

Mainly maintain the following versions:

• 3.x

  Based on Spring Boot 3, baseline is JDK 17, the corresponding branch is main.

  3.x version is kept in sync with Spring Boot 3, if you are using Spring Boot 3.2.x, then grpc-boot-starter 3.2.5 should be used.

  Spring Boot	grpc-boot-starter
  3.1.x	3.1.8
  3.2.x	3.2.5

• 2.x

  Based on Spring Boot 2, baseline is JDK 8, the corresponding branch is 2.x

  Spring Boot	grpc-boot-starter
  2.x	2.1.6

License

The MIT License.