+ LOG.debug("Sending change notification {} to listener {}", change, listener);
+
+ try {
+ this.listener.onDataChanged(change);
+ } catch (RuntimeException e) {
+ LOG.error( String.format( "Error notifying listener %s", this.listener ), e );
+ }
+
+ // It seems the sender is never null but it doesn't hurt to check. If the caller passes in
+ // a null sender (ActorRef.noSender()), akka translates that to the deadLetters actor.
+ if(getSender() != null && !getContext().system().deadLetters().equals(getSender())) {
+ getSender().tell(DataChangedReply.INSTANCE, getSelf());