001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.dao.jdbc.aop;
016    
017    import com.liferay.portal.kernel.dao.jdbc.aop.MasterDataSource;
018    import com.liferay.portal.kernel.util.StringPool;
019    import com.liferay.portal.spring.aop.ChainableMethodAdvice;
020    import com.liferay.portal.spring.aop.ServiceBeanAopCacheManager;
021    
022    import java.lang.reflect.Method;
023    
024    import org.aopalliance.intercept.MethodInvocation;
025    
026    import org.springframework.transaction.interceptor.TransactionAttribute;
027    import org.springframework.transaction.interceptor.TransactionAttributeSource;
028    
029    /**
030     * @author Shuyang Zhou
031     * @author L??szl?? Csontos
032     */
033    public class DynamicDataSourceAdvice extends ChainableMethodAdvice {
034    
035            @Override
036            public Object before(MethodInvocation methodInvocation) throws Throwable {
037                    Operation operation = Operation.WRITE;
038    
039                    Object targetBean = methodInvocation.getThis();
040    
041                    Class<?> targetClass = targetBean.getClass();
042    
043                    Method targetMethod = methodInvocation.getMethod();
044    
045                    MasterDataSource masterDataSource =
046                            ServiceBeanAopCacheManager.getAnnotation(
047                                    methodInvocation, MasterDataSource.class,
048                                    _nullMasterDataSource);
049    
050                    if (masterDataSource == _nullMasterDataSource) {
051                            TransactionAttribute transactionAttribute =
052                                    _transactionAttributeSource.getTransactionAttribute(
053                                            targetMethod, targetClass);
054    
055                            if ((transactionAttribute != null) &&
056                                    transactionAttribute.isReadOnly()) {
057    
058                                    operation = Operation.READ;
059                            }
060                    }
061    
062                    _dynamicDataSourceTargetSource.setOperation(operation);
063    
064                    String targetClassName = targetClass.getName();
065    
066                    _dynamicDataSourceTargetSource.pushMethod(
067                            targetClassName.concat(StringPool.PERIOD).concat(
068                                    targetMethod.getName()));
069    
070                    return null;
071            }
072    
073            @Override
074            public void duringFinally(MethodInvocation methodInvocation) {
075                    _dynamicDataSourceTargetSource.popMethod();
076            }
077    
078            public void setDynamicDataSourceTargetSource(
079                    DynamicDataSourceTargetSource dynamicDataSourceTargetSource) {
080    
081                    _dynamicDataSourceTargetSource = dynamicDataSourceTargetSource;
082            }
083    
084            public void setTransactionAttributeSource(
085                    TransactionAttributeSource transactionAttributeSource) {
086    
087                    _transactionAttributeSource = transactionAttributeSource;
088            }
089    
090            @Override
091            protected void setServiceBeanAopCacheManager(
092                    ServiceBeanAopCacheManager serviceBeanAopCacheManager) {
093    
094                    if (this.serviceBeanAopCacheManager != null) {
095                            return;
096                    }
097    
098                    this.serviceBeanAopCacheManager = serviceBeanAopCacheManager;
099    
100                    serviceBeanAopCacheManager.registerAnnotationChainableMethodAdvice(
101                            MasterDataSource.class, null);
102            }
103    
104            private static MasterDataSource _nullMasterDataSource =
105                    new MasterDataSource() {
106    
107                            @Override
108                            public Class<? extends MasterDataSource> annotationType() {
109                                    return MasterDataSource.class;
110                            }
111    
112                    };
113    
114            private DynamicDataSourceTargetSource _dynamicDataSourceTargetSource;
115            private TransactionAttributeSource _transactionAttributeSource;
116    
117    }