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.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(ShardSelector.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  }