1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights 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  }