/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2006, Red Hat Middleware LLC, 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.aspects.patterns.readwritelock;


import EDU.oswego.cs.dl.util.concurrent.ReadWriteLock;
import EDU.oswego.cs.dl.util.concurrent.ReentrantWriterPreferenceReadWriteLock;
import org.jboss.aop.joinpoint.MethodInvocation;

/**
 * @version <tt>$Revision: 57186 $</tt>
 * @author  <a href="mailto:chussenet@yahoo.com">{Claude Hussenet Independent Consultant}</a>.
 */
public class ReadWriteLockAspect
{

   private ReadWriteLock readWriteLock = new ReentrantWriterPreferenceReadWriteLock();

   public ReadWriteLockAspect()
   {

   }

   public Object readLockMethod(MethodInvocation invocation) throws Throwable
   {
      Object result=null;

      try
      {
         readWriteLock.readLock().acquire();
         result= invocation.invokeNext();
      }
      finally
      {
   		readWriteLock.readLock().release();
      }
      return result;
   }

   public Object writeLockMethod(MethodInvocation invocation) throws Throwable
   {
      Object result = null;

      try
      {
         readWriteLock.writeLock().acquire();
         result= invocation.invokeNext();
      }
      finally
      {
   		readWriteLock.writeLock().release();
      }
     return result;
   }

}
