/*
* JBoss, Home of Professional Open Source
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb;

import org.jboss.tm.usertx.UserTransactionProvider;
import org.jboss.tm.usertx.UserTransactionRegistry;

/**
 * EJB2UserTransactionProvider.
 * 
 * @author <a href="adrian@jboss.com">Adrian Brock</a>
 * @version $Revision: 85945 $
 */
public class EJB2UserTransactionProvider implements UserTransactionProvider
{
   /** The singleton */
   private static EJB2UserTransactionProvider singleton = new EJB2UserTransactionProvider();
   
   /** The registry */
   private volatile UserTransactionRegistry registry;

   /**
    * Get the singleton
    * 
    * @return the singleton
    */
   public static EJB2UserTransactionProvider getSingleton()
   {
      return singleton;
   }
   
   public void setTransactionRegistry(UserTransactionRegistry registry)
   {
      this.registry = registry;
   }

   /**
    * Fire the user transaction started event
    */
   void userTransactionStarted() 
   {
      UserTransactionRegistry registry = this.registry;
      if (registry != null)
         registry.userTransactionStarted();
   }
}