/*

  * Copyright (C) The Apache Software Foundation. All rights reserved.

  *

  * This software is published under the terms of the Apache Software License

  * version 1.1, a copy of which has been included with this distribution in

  * the LICENSE file.

  * 

  * $Id: Messagelet.java 155459 2005-02-26 13:24:44Z dirkv $

  */

 package org.apache.commons.messagelet;

 import java.io.IOException;

 import javax.jms.JMSException;

 import javax.servlet.GenericServlet;

 import javax.servlet.ServletException;

 import javax.servlet.ServletRequest;

 import javax.servlet.ServletResponse;

 /** <p><code>Messengerlet</code> the base class for a servlet which processes 

   * JMS messages via a MessageletRequest and MessageletResponse.</p>

   *

   * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>

   * @version $Revision: 155459 $

   */

 public abstract class Messagelet extends GenericServlet {

     public abstract void service( MessageletRequest request, MessageletResponse response ) 

         throws IOException, JMSException, ServletException;

     public void service( ServletRequest req, ServletResponse res ) throws ServletException, IOException {

         MessageletRequest request;

         MessageletResponse response;

     try {

         request = (MessageletRequest) req;

         response = (MessageletResponse) res;

     } 

         catch (ClassCastException e) {

         throw new ServletException("non-Message request or response");

     }

         try {

             service(request, response);

         }

         catch (JMSException e) {

             throw new ServletException(e);

         }

     }

 }