1 /***
2 * Copyright 2003-2010 Terracotta, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package net.sf.ehcache.cluster;
17
18 /***
19 * A listener for cluster topology events
20 *
21 * @author Geert Bevin
22 * @since 2.0
23 */
24 public interface ClusterTopologyListener {
25
26 /***
27 * A node has joined the cluster
28 *
29 * @param node The joining node
30 */
31 void nodeJoined(ClusterNode node);
32
33 /***
34 * A node has left the cluster
35 *
36 * @param node The departing node
37 */
38 void nodeLeft(ClusterNode node);
39
40 /***
41 * This node has established contact with the cluster and can execute clustered operations.
42 *
43 * @param node The current node
44 */
45 void clusterOnline(ClusterNode node);
46
47 /***
48 * This node has lost contact (possibly temporarily) with the cluster and cannot execute
49 * clustered operations
50 *
51 * @param node The current node
52 */
53 void clusterOffline(ClusterNode node);
54
55 /***
56 * This node lost contact and rejoined the cluster again.
57 * <p />
58 * This event is only fired in the node which rejoined and not to all the connected nodes
59 * @param oldNode The old node which got disconnected
60 * @param newNode The new node after rejoin
61 */
62 void clusterRejoined(ClusterNode oldNode, ClusterNode newNode);
63
64 }