001    /**
002     * Copyright (c) 2000-2012 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;
016    
017    import com.liferay.portal.kernel.dao.jdbc.CurrentConnection;
018    
019    import java.sql.Connection;
020    
021    import javax.sql.DataSource;
022    
023    import org.springframework.jdbc.datasource.ConnectionHolder;
024    import org.springframework.transaction.support.TransactionSynchronizationManager;
025    
026    /**
027     * @author Shuyang Zhou
028     */
029    public class CurrentConnectionImpl implements CurrentConnection {
030    
031            public Connection getConnection(DataSource dataSource) {
032                    ConnectionHolder connectionHolder =
033                            (ConnectionHolder)TransactionSynchronizationManager.getResource(
034                                    dataSource);
035    
036                    if (connectionHolder == null) {
037                            return null;
038                    }
039                    else {
040                            return connectionHolder.getConnection();
041                    }
042            }
043    
044    }