gRPC does not discover `@Blocking` correctly

Describe the bug

io.quarkus.grpc.deployment.GrpcServerProcessor#gatherBlockingMethods only discovers @Blocking on classes that directly extend the gRPC *ImplBase classes, but not on subclasses.

@Blocking discovery works in these cases:

@Blocking
@GrpcService
class MyService extends MyServiceImplBase {
  // ...
}

and

// in another artifact
@GrpcService
class MyServiceSuper extends MyServiceImplBase {
  // ...
}

class MyService extends MyServiceSuper {
  // @Blocking must be applied to all methods - aka must override all methods here
  @Blocking
  @Override
  void methodFromMyServiceImplBase() {
    // ...
  }
}

@Blocking discovery does not work in this case:

// in another artifact
class MyServiceSuper extends MyServiceImplBase {
  // ...
}

@Blocking // doesn't work, not detected by GrpcServerProcessor#gatherBlockingMethods
@GrpcService
class MyService extends MyServiceSuper {
  // ...
}

Expected behavior

Allow @Blocking on classes that indirectly extend *ImplBase

Actual behavior

@Blocking is not detected for class MyService extends BaseService extends MyServiceImplBase (not proper Java…)

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

No response

GraalVM version (if different from Java)

No response

Quarkus version or git rev

2.7.2

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[snazy]

Hello @snazy, I miss the @GrpcService annotation in the examples. Is MyService supposed to be the service impl that should be registered?

Oops, yea. Updated the description.

[snazy]

I’ll try to prepare a PR to fix this one.