@GrpcService
public class GreeterServiceImpl extends GreeterServiceGrpc.GreeterServiceImplBase {
    
    @Override
    public void greet() {
        // your logic
    }
}

@GrpcClient
private GreeterServiceGrpc.GreeterServiceFutureStub stub

// some code

stub.greet();

NacosDiscoveryProperties nacosDiscoveryProperties = ApplicationContextHelper.getBean(NacosDiscoveryProperties.class);

final Instance instance = nacosDiscoveryProperties.namingServiceInstance().selectOneHealthyInstance("xxxx", true);

final ManagedChannel channel = ManagedChannelBuilder.forAddress(instance.getIPAddr(), instance.getPort())
                .usePlaintext()
                .build();
        final GreeterServiceGrpc.GreeterServiceFutureStub stub = GreeterServiceGrpc.newFutureStub(channel);
        stub.greet(name);