Hello All,
First of all thanks for your prompt reply.
Sorry but i am still having doubt because i am very new to AKKA.
Right now we are running Web Application with 3 tier architecture [Actions
Layer, Business Logic Layer, Data Access Object Layer].
So i need to use AKKA after my Business Logic Layer.
For e.g.
-> Sender_BLL_1 is Non-Actor java class
1) Non-Actor Calling Java class
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.actor.Props;
public class Sender_BLL_1 {
private void run() {
ActorSystem system = ActorSystem.create("MySystem1"); <-----
ActorRef myActor = system.actorOf(new Props(AkkaActor1.class),
"AkkaActor1");
myActor.tell("Hello");
}
}
2) First Actor
import akka.actor.UntypedActor;
import akka.event.Logging;
import akka.event.LoggingAdapter;
public class AkkaActor1 extends UntypedActor {
LoggingAdapter log = Logging.getLogger(getContext().system(), this);
public void onReceive(Object object) throws Exception {
if (object instanceof String) {
String str = (String) object;
log.info("Received String message in AkkaActor1 : {}", str);
} else {
unhandled(object);
}
}
}
But suppose when i want call another Actor from another BLL file then again
i need to write
" ActorSystem system = ActorSystem.create("MySystem"); " for creating
ActorSystem.
For e.g.
-> Sender_BLL_2 is Non-Actor java class
1) Non-Actor Calling Java class
import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.actor.Props;
public class Sender_BLL_2 {
private void run() {
ActorSystem system = ActorSystem.create("MySystem2"); <-----
ActorRef myActor = system.actorOf(new Props(AkkaActor2.class),
"AkkaActor2");
myActor.tell("Hello");
}
}
2) Second Actor
import akka.actor.UntypedActor;
import akka.event.Logging;
import akka.event.LoggingAdapter;
public class AkkaActor2 extends UntypedActor {
LoggingAdapter log = Logging.getLogger(getContext().system(), this);
public void onReceive(Object object) throws Exception {
if (object instanceof String) {
String str = (String) object;
log.info("Received String message in AkkaActor2 : {}", str);
} else {
unhandled(object);
}
}
}
That means i have created 2 ActorSystem for 2 Business Logic files [it will
increase as my BLL file runs] like that we are
having more then 500 Business Logic files in my Web Application.
But as i know that An ActorSystem is a heavyweight object so we need to
create only one per logical application.
So what is the way to create only 1 ActorSystem for any Web Application or
to check for existing ActorSystem.
On Monday, June 11, 2012 5:58:27 AM UTC+5:30, dimgel wrote:
>
> Hi all,
>
> Since actors are stateful, I have to create an actor tree for each HTTP
> request I handle, right?
>
> Have I to create ActorSystem for each request too, or I can create the
> only one in Servlet.init(), reuse it for all (possibly concurrent)
> requests, and shut it down in Servlet.destroy()?
>
> Is there any recommended way of generating unique ActorSystem names if
> each request needs its own ActorSystem, or unique Actor names otherwise?
> (AFAIK names are optional and that's OK for standalone server, but anyway
> maybe someone came upon some guidelines about naming in distributed
> environment.)
>
> Thanks. =)
>
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