1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.kernel.cache.cluster;
16  
17  import java.util.Comparator;
18  
19  /**
20   * <a href="PortalCacheClusterEventCoalesceComparator.java.html"><b><i>View
21   * Source</i></b></a>
22   *
23   * @author Shuyang Zhou
24   */
25  public class PortalCacheClusterEventCoalesceComparator
26      implements Comparator<PortalCacheClusterEvent> {
27  
28      public int compare(
29          PortalCacheClusterEvent portalCacheClusterEvent1,
30          PortalCacheClusterEvent portalCacheClusterEvent2) {
31  
32          if ((portalCacheClusterEvent1 == null) ||
33              (portalCacheClusterEvent2 == null)) {
34  
35              return 1;
36          }
37  
38          if (portalCacheClusterEvent1.getCacheName().equals(
39                  portalCacheClusterEvent2.getCacheName()) &&
40              portalCacheClusterEvent1.getElementKey().equals(
41                  portalCacheClusterEvent2.getElementKey())) {
42  
43              return 0;
44          }
45          else {
46              return -1;
47          }
48      }
49  
50  }