1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.dao.jdbc.aop;
24  
25  import com.liferay.portal.kernel.util.StringPool;
26  
27  import java.lang.reflect.Method;
28  
29  import org.aopalliance.intercept.MethodInvocation;
30  
31  import org.springframework.transaction.interceptor.TransactionAttribute;
32  import org.springframework.transaction.interceptor.TransactionAttributeSource;
33  import org.springframework.transaction.interceptor.TransactionInterceptor;
34  
35  /**
36   * <a href="DynamicDataSourceTransactionInterceptor.java.html"><b><i>View Source
37   * </i></b></a>
38   *
39   * @author Michael Young
40   *
41   */
42  public class DynamicDataSourceTransactionInterceptor
43      extends TransactionInterceptor {
44  
45      public Object invoke(MethodInvocation methodInvocation) throws Throwable {
46          Class<?> targetClass = null;
47  
48          if (methodInvocation.getThis() != null) {
49              targetClass = methodInvocation.getThis().getClass();
50          }
51  
52          Method targetMethod = methodInvocation.getMethod();
53  
54          TransactionAttributeSource transactionAttributeSource =
55              getTransactionAttributeSource();
56  
57          TransactionAttribute transactionAttribute =
58              transactionAttributeSource.getTransactionAttribute(
59                  targetMethod, targetClass);
60  
61          if ((transactionAttribute != null) &&
62              (transactionAttribute.isReadOnly())) {
63  
64              _dynamicDataSourceTargetSource.setOperation(Operation.READ);
65          }
66          else {
67              _dynamicDataSourceTargetSource.setOperation(Operation.WRITE);
68          }
69  
70          StringBuilder sb = new StringBuilder();
71  
72          sb.append(targetClass.getName());
73          sb.append(StringPool.PERIOD);
74          sb.append(targetMethod.getName());
75  
76          _dynamicDataSourceTargetSource.pushMethod(sb.toString());
77  
78          Object returnValue = null;
79  
80          try {
81              returnValue = super.invoke(methodInvocation);
82          }
83          finally {
84              _dynamicDataSourceTargetSource.popMethod();
85          }
86  
87          return returnValue;
88      }
89  
90      public void setDynamicDataSourceTargetSource(
91          DynamicDataSourceTargetSource dynamicDataSourceTargetSource) {
92  
93          _dynamicDataSourceTargetSource = dynamicDataSourceTargetSource;
94      }
95  
96      private DynamicDataSourceTargetSource _dynamicDataSourceTargetSource;
97  
98  }