Akka Actor Forward Message

You can forward a message from one actor to another. In this case, address/reference of an Actor is maintained even though the message is going through a 'mediator'.

It is helpful when writing actors that work as routers, load-balancers, replicators etc.

Akka Actor Forward Message Example

import akka.actor.{Actor,ActorSystem, Props};

class ActorExample extends Actor{
  def receive = {
    case message:String => println("Message received from "+sender().path.name+" : "+message);
    val child = context.actorOf(Props[Actor2],"ChildActor");
    println("message forwarded to child Actor");  
    child ! message ;    // Message forwarded to child actor 

    case _ => println("Unknown message");
  }
}

class Actor2 extends Actor{
  def receive ={
    case message:String => println("Message received from "+sender().path.name+" : "+message);
    case _ => println("Unknown message");
  }
}


object ActorExample{
  def main(args:Array[String]){
    val actorSystem = ActorSystem("ActorSystem");
    val actor = actorSystem.actorOf(Props[ActorExample], "RootActor");
    actor ! "Hello"
  }
}

Output:

Message received from deadLetters : Hello
message forwarded to child Actor
Message received from RootActor : Hello

Next TopicAkka Stopping Actors

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