grpc server with springboot

generated single file from proto file

I put generated file in api folder, since proto fils and generated files should be apis between client and server

option java_package="com.pxample.api";
//option java_multiple_files = true;
option java_outer_classname = "CityScore";

the starter with grpc server

		<dependency>
			<groupId>net.devh</groupId>
			<artifactId>grpc-server-spring-boot-starter</artifactId>
			<version>2.12.0.RELEASE</version>
		</dependency>

@GrpcService

Annotation that marks gRPC services that should be registered with a gRPC server. If spring-boot's auto configuration is used, then the server will be created automatically. This annotation should only be added to implementations of BindableService (GrpcService-ImplBase).

The starter will add service to grpc server automatically.

source folder and target folder

					<protoSourceRoot>
						${basedir}/src/main/resources/proto/
					</protoSourceRoot>
					<outputDirectory>${basedir}/src/main/java/</outputDirectory>

					<clearOutputDirectory>false</clearOutputDirectory>

The false value will not clean the generated folder when compiling the proto files.

Customized grpc exception

@GrpcAdvice
public class CityScoreExceptionHandler {

    @GrpcExceptionHandler(CityScoreException.class)
    public StatusRuntimeException handleValidationError(CityScoreException cause) {
        ...