import akka.actor.ActorRef;
import akka.actor.Props;
-import akka.actor.UntypedActor;
+import akka.actor.UntypedAbstractActor;
import akka.dispatch.ControlMessage;
import akka.pattern.Patterns;
import akka.util.Timeout;
import scala.concurrent.duration.Duration;
import scala.concurrent.duration.FiniteDuration;
-public class MessageCollectorActor extends UntypedActor {
+public class MessageCollectorActor extends UntypedAbstractActor {
private static final String ARE_YOU_READY = "ARE_YOU_READY";
public static final String GET_ALL_MESSAGES = "messages";