pekko/akka-samples/akka-sample-main-java-lambda/src/main/java/sample/hello/HelloWorld.java

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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());
}
}