How print all actors in akka system?

Question

I have created akka system. Suppose there are some actors in it. How I can print all actors from akka system with their path? (for debug purposes)

Answer 1

According to the documentation you can use ActorSelection with a wildcard * to make actors send identifying messages. You can have an actor that collect the ActorRefs.

As mentioned by @chris-martin only actors that are not currently busy will send. A very simple actor:

// make all the available actor to send an identifying message
public void freeActors()
{
  ActorSelection selection =
    getContext().actorSelection("/user/*");
  selection.tell(new Identify(identifyId), getSelf());
}

...
// collect responses
@Override
public void onReceive(Object message) {
  if (message instanceof ActorIdentity) {
    ActorIdentity identity = (ActorIdentity) message;
    // get the ref of the sender 
    ActorRef ref = identity.getRef();
    // the sender is up and available
   ...

EDIT: I know this is for Java, but it seemed helpful to me.