UniformPortalCacheClusterChannelSelector.java |
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.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 }