| RoundRobinShardSelector.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.dao.shard;
16
17 import com.liferay.portal.util.PortalInstances;
18 import com.liferay.portal.util.PropsValues;
19
20 import java.util.Map;
21
22 /**
23 * <a href="RoundRobinShardSelector.java.html"><b><i>View Source</i></b></a>
24 *
25 * @author Alexander Chow
26 */
27 public class RoundRobinShardSelector implements ShardSelector {
28
29 public String getShardName(
30 String scope, String shardName, Map<String, String> params) {
31
32 if (scope.equals(ShardUtil.COMPANY_SCOPE)) {
33 int instances = PortalInstances.getCompanyIds().length;
34 int shards = PropsValues.SHARD_AVAILABLE_NAMES.length;
35
36 return PropsValues.SHARD_AVAILABLE_NAMES[instances % shards];
37 }
38 else {
39 return PropsValues.SHARD_DEFAULT_NAME;
40 }
41 }
42
43 }