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     */
022    package org.granite.tide.data;
023    
024    import javax.naming.InitialContext;
025    import javax.naming.NamingException;
026    import javax.transaction.NotSupportedException;
027    import javax.transaction.SystemException;
028    import javax.transaction.UserTransaction;
029    
030    import org.granite.tide.TideTransactionManager;
031    
032    /**
033     * Responsible for attaching a entity with the entity mangager
034     * @author cingram
035     *
036     */
037    public 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    }