Hi,
I have actor system, I initialize it at the application beginning.
I need to call these actors from my controllers, so I pass the ActorRef to
my controllers/services and keep them in local variable.
upon some actions from user the actor system could be stopped, then started
(not restart).
keeping the references in the controller/services causing me errors after
starting the ActorSystem as the controllers hold the old references
(incarnations).
So, how to keep the actor references?
should I use ActorSelection with each request? would that affect the
performance?
public class MyController {
public static Promise<Result> myAction(String param) {
ActorSelection myActor = Akka.system().actorSelection(
"akka://application/user/myActor");
String myMessage = "hello";
Promise<JSONObject> resultJsonObjectPromise =
Promise.wrap(ask(myActor, myMessage, 1000000)).map(
new Function<Object, JSONObject>() {
public JSONObject apply(Object response) {
return ((myResponse) response).getJsonResult();
}
});
return resultJsonObjectPromise.map(new Function<JSONObject, Result>() {
public Result apply(JSONObject response) {
return ok(response.toString());
}
});
}
}
or shall I keep the actor reference in a main class and each time
controller get the actor ref from this class?
public class ActorBag {
public static ActorRef myActorRef;
}
@ application start:
ActorBag.myActorRef = Akka.system().actorOf(
Props.create(MyActor.class, params), "MyActor");
public class MyController {
public static Promise<Result> myAction(String param) {
ActorRef myActor = ActorBag.myActorRef;
String myMessage = "hello";
Promise<JSONObject> resultJsonObjectPromise =
Promise.wrap(ask(myActor, myMessage, 1000000)).map(
new Function<Object, JSONObject>() {
public JSONObject apply(Object response) {
return ((myResponse) response).getJsonResult();
}
});
//same as above
}
}
What is the best practice
ActorRef myActor = ActorBag.myActorRef;
or
ActorSelection myActor =
Akka.system().actorSelection("akka://application/user/myActor");
or anything else
?
Regards,
MFarid
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