Support Springs @Ordered Annotation on GRpcServerRunner

[MCLonips]

I'm working with Spring Boots CommandLineRunner in my project to fill my application with some data after start. For that reason it is necessary to make a gRPC-Call. Your implementation of the GRpcServerRunner which is starting the gRPC-Server has the lowest order to be executed compared to all other CommandLineRunner. Without a working Server I am not able to make any gRPC-Calls after startup .

I did some research and found a Method to control the actual order of all CommandLineRunner
, Spring Boots @Ordered-Annotation. Is it possible to use it?

See my code-Snippet:

**
 * Hosts embedded gRPC server.
 */
@Slf4j
@Order(value = Ordered.HIGHEST_PRECEDENCE) //<-- Add this annotation
public class GRpcServerRunner implements CommandLineRunner, DisposableBean {
....
}

The value HIGHEST_PRECEDENCE forces Spring Boot to execute your runner directly after Startup. This would give me the opportunity to do some gRPC-Calls in my Runner.

[jvmlet]

I will check the order of servlet runner implemented by spring team and follow the same rules.
I would suggest you to add grpc-server- initialized event listener and execute your logic from there.

[jvmlet]

See GRpcServerInitializedEvent

[MCLonips]

Seems to work for me to subscribe on ApplicationContext to listen to GRpcServerInitializedEvent.
This also seems to be the correct way for my application thank you 👍

Regardless you should think about the @Order-annotation to make sure gRPC-Server has the highest order and will be initialized first

[jvmlet]

Controlled via grpc.start-up-phase property