1   /**
2    * Copyright (c) 2000-2009 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   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.portal.dao.shard;
21  
22  import com.liferay.portal.util.PropsValues;
23  
24  import java.util.Map;
25  
26  import javax.sql.DataSource;
27  
28  import org.springframework.aop.TargetSource;
29  
30  /**
31   * <a href="ShardDataSourceTargetSource.java.html"><b><i>View Source</i></b></a>
32   *
33   * @author Michael Young
34   *
35   */
36  public class ShardDataSourceTargetSource implements TargetSource {
37  
38      public DataSource getDataSource() {
39          return _dataSourceThreadLocal.get();
40      }
41  
42      public Object getTarget() throws Exception {
43          return getDataSource();
44      }
45  
46      public Class<DataSource> getTargetClass() {
47          return DataSource.class;
48      }
49  
50      public boolean isStatic() {
51          return false;
52      }
53  
54      public void releaseTarget(Object target) throws Exception {
55      }
56  
57      public void setDataSource(String shardName) {
58          _dataSourceThreadLocal.set(_dataSources.get(shardName));
59      }
60  
61      public void setDataSources(Map<String, DataSource> dataSources) {
62          _dataSources = dataSources;
63      }
64  
65      private static Map<String, DataSource> _dataSources;
66  
67      private static ThreadLocal<DataSource> _dataSourceThreadLocal =
68          new ThreadLocal<DataSource>() {
69  
70          protected DataSource initialValue() {
71              return _dataSources.get(PropsValues.SHARD_DEFAULT_NAME);
72          }
73  
74      };
75  
76  }