/*
 * IronJacamar, a Java EE Connector Architecture implementation
 * Copyright 2011, Red Hat Inc, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file 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.jca.core.tx.vts;

import org.jboss.jca.core.spi.transaction.usertx.UserTransactionListener;
import org.jboss.jca.core.spi.transaction.usertx.UserTransactionProvider;
import org.jboss.jca.core.spi.transaction.usertx.UserTransactionRegistry;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import javax.transaction.SystemException;

/**
 * UserTransactionRegistry implementation.
 * 
 * @author <a href="jesper.pedersen@ironjacamar.org">Jesper Pedersen</a>
 */
public class UserTransactionRegistryImpl implements UserTransactionRegistry
{
   /** Listeners */
   private Set<UserTransactionListener> listeners;

   /** Providers */
   private Set<UserTransactionProvider> providers;

   /**
    * Constructor
    */
   public UserTransactionRegistryImpl()
   {
      this.listeners = Collections.synchronizedSet(new HashSet<UserTransactionListener>());
      this.providers = Collections.synchronizedSet(new HashSet<UserTransactionProvider>());
   }

   /**
    * {@inheritDoc}
    */
   public void addListener(UserTransactionListener listener)
   {
      if (listener != null)
         listeners.add(listener);
   }
   
   /**
    * {@inheritDoc}
    */
   public void removeListener(UserTransactionListener listener)
   {
      if (listener != null)
         listeners.remove(listener);
   }

   /**
    * {@inheritDoc}
    */
   public void addProvider(UserTransactionProvider provider)
   {
      if (provider != null)
      {
         provider.setUserTransactionRegistry(this);
         providers.add(provider);
      }
   }
   
   /**
    * {@inheritDoc}
    */
   public void removeProvider(UserTransactionProvider provider)
   {
      if (provider != null)
      {
         provider.setUserTransactionRegistry(null);
         providers.remove(provider);
      }
   }

   /**
    * {@inheritDoc}
    */
   public void userTransactionStarted()
   {
      for (UserTransactionListener utl : listeners)
      {
         try
         {
            utl.userTransactionStarted();
         }
         catch (SystemException se)
         {
            // Ignore
         }
      }
   }
}
