| UniformPortalCacheClusterChannelSelector.java |
1 /**
2 * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3 *
4 * The contents of this file are subject to the terms of the Liferay Enterprise
5 * Subscription License ("License"). You may not use this file except in
6 * compliance with the License. You can obtain a copy of the License by
7 * contacting Liferay, Inc. See the License for the specific language governing
8 * permissions and limitations under the License, including but not limited to
9 * distribution rights of the Software.
10 *
11 *
12 *
13 */
14
15 package com.liferay.portal.kernel.cache.cluster;
16
17 import java.util.List;
18 import java.util.concurrent.atomic.AtomicLong;
19
20 /**
21 * <a href="UniformPortalCacheClusterChannelSelector.java.html"><b><i>View
22 * Source</i></b></a>
23 *
24 * @author Shuyang Zhou
25 */
26 public class UniformPortalCacheClusterChannelSelector
27 implements PortalCacheClusterChannelSelector {
28
29 public long getSelectedNumber() {
30 return _eventCounter.get();
31 }
32
33 public PortalCacheClusterChannel select(
34 List<PortalCacheClusterChannel> portalCacheClusterChannels,
35 PortalCacheClusterEvent portalCacheClusterEvent) {
36
37 long count = _eventCounter.getAndIncrement();
38 int size = portalCacheClusterChannels.size();
39
40 return portalCacheClusterChannels.get((int)(count % size));
41 }
42
43 private AtomicLong _eventCounter = new AtomicLong(0);
44
45 }