Hibernate4SynchronizationManager.java

/**
 *   GRANITE DATA SERVICES
 *   Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
 *
 *   This file is part of the Granite Data Services Platform.
 *
 *   Granite Data Services is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2.1 of the License, or (at your option) any later version.
 *
 *   Granite Data Services is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
 *   General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 *   USA, or see <http://www.gnu.org/licenses/>.
 */
package org.granite.tide.spring;

import org.granite.tide.data.DataContext;
import org.granite.tide.data.DataEnabled.PublishMode;
import org.granite.tide.data.TideSynchronizationManager;
import org.hibernate.Session;
import org.hibernate.action.spi.BeforeTransactionCompletionProcess;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.internal.SessionImpl;
import org.springframework.orm.hibernate4.SessionHolder;

/**
 * Responsible for registering a publishing queued process on the Hibernate 4 session
 * @author william
 */
public class Hibernate4SynchronizationManager implements TideSynchronizationManager {
	
	public boolean registerSynchronization(Object resource, boolean shouldRemoveContextAtEnd) {
		Session session = null;
		if (resource instanceof Session)
			session = (Session)resource;
		else if (resource instanceof SessionHolder)
			session = ((SessionHolder)resource).getSession();
		else
			throw new IllegalArgumentException("Unknow resource for registering synchronization " + resource);
		
		((SessionImpl)session).getActionQueue().registerProcess(new HibernateDataPublishingProcess(shouldRemoveContextAtEnd));
		return true;
	}
	
	private static class HibernateDataPublishingProcess implements BeforeTransactionCompletionProcess {
		
		private boolean removeContext;
		
		public HibernateDataPublishingProcess(boolean removeContext) {
			this.removeContext = removeContext;
		}
		
		public void doBeforeTransactionCompletion(SessionImplementor session) {
			DataContext.publish(PublishMode.ON_COMMIT);
			if (removeContext)
				DataContext.remove();
		}
	}

}