Akka/Scala example source code file (HelloWorld.java)

This example Akka source code file (HelloWorld.java) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

abstractactor, actor, actorref, akka, helloworld, japi, override

The HelloWorld.java Akka example source code

package sample.hello;

import akka.actor.AbstractActor;
import akka.actor.Props;
import akka.actor.ActorRef;
import akka.japi.pf.ReceiveBuilder;
import static sample.hello.Greeter.Msg;

public class HelloWorld extends AbstractActor {

  public HelloWorld() {
    receive(ReceiveBuilder.
      matchEquals(Msg.DONE, m -> {
        // when the greeter is done, stop this actor and with it the application
        context().stop(self());
      }).build());
  }

  @Override
  public void preStart() {
    // create the greeter actor
    final ActorRef greeter = getContext().actorOf(Props.create(Greeter.class), "greeter");
    // tell it to perform the greeting
    greeter.tell(Greeter.Msg.GREET, self());
  }
}