2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.remote.rpc.registry.gossip;
10 import akka.actor.ActorRef;
11 import java.util.Optional;
14 * Marker interface for data which is able to be held in a {@link Bucket}.
16 * @author Robert Varga
18 * @param <T> Concrete BucketData type
20 public interface BucketData<T extends BucketData<T>> {
22 * Return the {@link ActorRef} which should be tracked as the authoritative source of this bucket's data.
23 * The bucket will be invalidated should the actor be reported as Terminated.
25 * @return Optional ActorRef.
27 Optional<ActorRef> getWatchActor();