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.jdo.PersistenceManager;
025 import javax.jdo.PersistenceManagerFactory;
026 import javax.jdo.Transaction;
027
028 import org.granite.tide.TideTransactionManager;
029
030 /**
031 * Responsible for attaching a entity with the entity mangager
032 * @author William DRAI
033 *
034 */
035 public class JDOPersistenceManager extends AbstractTidePersistenceManager implements TideTransactionPersistenceManager {
036
037 protected PersistenceManager pm;
038
039
040 public JDOPersistenceManager() {
041 super(new JDOTransactionManager());
042 }
043
044 public JDOPersistenceManager(PersistenceManagerFactory pmf) {
045 this(pmf, null);
046 }
047
048 public JDOPersistenceManager(PersistenceManagerFactory pmf, TideTransactionManager tm) {
049 super(tm != null ? tm : new JDOTransactionManager());
050 pm = pmf.getPersistenceManager();
051 }
052
053 public Object getCurrentTransaction() {
054 Transaction t = pm.currentTransaction();
055 t.begin();
056 return t;
057 }
058
059 @Override
060 public void close() {
061 if (pm != null && !pm.isClosed())
062 pm.close();
063 }
064
065
066 /**
067 * Finds the entity with the JDO persistence manager.
068 * @return the entity
069 */
070 @Override
071 public Object fetchEntity(Object entity, String[] fetch) {
072 Object id = pm.getObjectId(entity);
073 if (id == null)
074 return null;
075
076 return pm.getObjectById(id);
077 }
078
079
080 public static class JDOTransactionManager implements TideTransactionManager {
081
082 public Object begin(TideTransactionPersistenceManager pm) {
083 if (pm != null)
084 return pm.getCurrentTransaction();
085 return null;
086 }
087
088 public void commit(Object t) throws Exception {
089 ((Transaction)t).commit();
090 }
091
092 public void rollback(Object t) {
093 ((Transaction)t).rollback();
094 }
095 }
096 }