001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.tide.data;
023
024import javax.naming.InitialContext;
025import javax.naming.NamingException;
026import javax.transaction.NotSupportedException;
027import javax.transaction.SystemException;
028import javax.transaction.UserTransaction;
029
030import org.granite.tide.TideTransactionManager;
031
032/**
033 * Responsible for attaching a entity with the entity mangager
034 * @author cingram
035 *
036 */
037public class JTATransactionManager implements TideTransactionManager {
038        
039        public static final String USER_TRANSACTION_JNDI = "java:comp/UserTransaction";
040
041        
042        public Object begin(TideTransactionPersistenceManager pm) {
043        try {
044            InitialContext ic = new InitialContext();
045            UserTransaction ut = (UserTransaction)ic.lookup(USER_TRANSACTION_JNDI);
046            ut.begin();
047            return ut;
048        }
049        catch (NamingException f) {
050            throw new RuntimeException("Could not initiate JTA transaction for lazy initialization", f);
051        }
052        catch (SystemException f) {
053            throw new RuntimeException("Could not initiate JTA transaction for lazy initialization", f);
054        }
055        catch (NotSupportedException f) {
056            throw new RuntimeException("Could not initiate JTA transaction for lazy initialization", f);
057        }
058        }
059        
060        public void commit(Object tx) throws Exception {
061        if (tx instanceof UserTransaction)
062            ((UserTransaction)tx).commit();
063        }
064        
065        public void rollback(Object tx) {
066            try {
067            if (tx instanceof UserTransaction)
068                ((UserTransaction)tx).rollback();
069        }
070        catch (Exception e) {
071            throw new RuntimeException("Unable to rollback attach entity and init collection", e);
072        }
073        }
074}