Hi,
Message ordering is preserved between a sender-receiver pair. However, this
refers to the actual actual actor sending the message, regardless of the
ActorRef passed as the sender reference.
In the example above, both messages are being sent from the same context,
and therefor should be sent in-order.
Tal
On Saturday, September 3, 2016 at 8:19:33 AM UTC+3, que...@gmail.com wrote:
>
> I'm early in learning Akka. The hello-akka-java8 tutorial has greeter.tell
> from no actor, followed by inbox.send:
>
> final ActorRef greeter = system.actorOf(Props.create(Greeter.class),
> "greeter");
> final Inbox inbox = Inbox.create(system);
> greeter.tell(new WhoToGreet("akka"), ActorRef.noSender());
> inbox.send(greeter, new Greet());
> Greeting greeting1 = (Greeting) inbox.receive(Duration.create(5,
> TimeUnit.SECONDS));
>
> Can I expect that the greeter actor is going to process new
> WhoToGreet("akka"), before new Greet()?
>
> If so, why?
>
> I read in Akka documentation:
>
> "*...for a given pair of actors, messages sent directly from the first to
> the second will not be received out-of-order.* The word *directly* emphasizes
> that this guarantee only applies when sending with the telloperator to
> the final destination, not when employing mediators or other message
> dissemination features (unless stated otherwise)."
>
> I think the tutorial is not sending messages from one actor.
>
>
>
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