How to use

group

method

in

akka.cluster.pubsub.DistributedPubSubMediator$Subscribe

@Override
public Receive createReceive() {
  return handleEvents().orElse(ReceiveBuilder.create()
      .match(DistributedPubSubMediator.SubscribeAck.class, subscribeAck ->
          log.debug("Got SubscribeAck about topic <{}> for group <{}>",
              subscribeAck.subscribe().topic(),
              subscribeAck.subscribe().group()))
      .matchAny(message -> {
        log.warning("Unhandled message <{}>", message);
        unhandled(message);
      })
      .build());
}