MarshallActor.java

package actors;

import akka.actor.ActorSystem;
import akka.actor.Props;
import akka.actor.UntypedActor;

import javax.inject.Inject;

/**
 * You might or might not want this actor in the end. In this example, its role is to be the central point of
 * contact between your web app and the actor system that might be receiving outside events.
 */
public class MarshallActor extends UntypedActor {

    StringBuilder messages = new StringBuilder();

    public static Props props = Props.create(MarshallActor.class);

    public MarshallActor() {

    }

    @Override
    public void onReceive(Object message) {
        if (message.equals("Report!")) {
            getSender().tell(messages.toString(), getSelf());
        } else {
            messages.append(getSender().toString());
            messages.append(" said ");
            messages.append(message);
            messages.append("\n");
        }

    }

}