001/*
002  GRANITE DATA SERVICES
003  Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005  This file is part of Granite Data Services.
006
007  Granite Data Services is free software; you can redistribute it and/or modify
008  it under the terms of the GNU Library General Public License as published by
009  the Free Software Foundation; either version 2 of the License, or (at your
010  option) any later version.
011
012  Granite Data Services is distributed in the hope that it will be useful, but
013  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015  for more details.
016
017  You should have received a copy of the GNU Library General Public License
018  along with this library; if not, see <http://www.gnu.org/licenses/>.
019*/
020
021package org.granite.tide.data;
022
023import javax.naming.InitialContext;
024import javax.naming.NamingException;
025import javax.transaction.NotSupportedException;
026import javax.transaction.SystemException;
027import javax.transaction.UserTransaction;
028
029import org.granite.tide.TideTransactionManager;
030
031/**
032 * Responsible for attaching a entity with the entity mangager
033 * @author cingram
034 *
035 */
036public class JTATransactionManager implements TideTransactionManager {
037        
038        public static final String USER_TRANSACTION_JNDI = "java:comp/UserTransaction";
039
040        
041        public Object begin(TideTransactionPersistenceManager pm) {
042        try {
043            InitialContext ic = new InitialContext();
044            UserTransaction ut = (UserTransaction)ic.lookup(USER_TRANSACTION_JNDI);
045            ut.begin();
046            return ut;
047        }
048        catch (NamingException f) {
049            throw new RuntimeException("Could not initiate JTA transaction for lazy initialization", f);
050        }
051        catch (SystemException f) {
052            throw new RuntimeException("Could not initiate JTA transaction for lazy initialization", f);
053        }
054        catch (NotSupportedException f) {
055            throw new RuntimeException("Could not initiate JTA transaction for lazy initialization", f);
056        }
057        }
058        
059        public void commit(Object tx) throws Exception {
060        if (tx instanceof UserTransaction)
061            ((UserTransaction)tx).commit();
062        }
063        
064        public void rollback(Object tx) {
065            try {
066            if (tx instanceof UserTransaction)
067                ((UserTransaction)tx).rollback();
068        }
069        catch (Exception e) {
070            throw new RuntimeException("Unable to rollback attach entity and init collection", e);
071        }
072        }
073}