/*
 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * 
 * - Redistribution in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any
 * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
 * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
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 */

package com.sun.j2ee.blueprints.opc.transitions;

import java.util.Collection;
import java.util.Iterator;
import javax.ejb.EJBException;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.jms.*;

import com.sun.j2ee.blueprints.servicelocator.ServiceLocatorException;
import com.sun.j2ee.blueprints.servicelocator.ejb.ServiceLocator;
import com.sun.j2ee.blueprints.processmanager.transitions.*;


/**
 * TransitionDelegate for MailOrderApproval MDB 
 */
public class MailOrderApprovalTransitionDelegate implements TransitionDelegate {

  private Queue q;
  private QueueConnectionFactory qFactory;
  private QueueHelper mailHelper; 

  public MailOrderApprovalTransitionDelegate() {}

  /**
   * sets up all the resources that will be needed to do a transition
   */
  public void setup() throws TransitionException {   
    try {
      ServiceLocator serviceLocator   = new ServiceLocator();   
      qFactory = serviceLocator.getQueueConnectionFactory(JNDINames.QUEUE_CONNECTION_FACTORY );
      q = serviceLocator.getQueue(JNDINames.MAIL_SENDER_QUEUE);
      mailHelper = new QueueHelper(qFactory, q); 
    } catch (ServiceLocatorException se) {
        throw new TransitionException(se);
    }       
  }    
   
/**
  * send a Mail message to mailer service, so customer gets an email
  */ 
  public void doTransition(TransitionInfo info) throws TransitionException {
    String xmlMail = null;
    Collection mailingList = info.getXMLMessageBatch();

    try {
      Iterator it = mailingList.iterator();
      while(it!= null && it.hasNext()) {
          xmlMail = (String) it.next();
          mailHelper.sendMessage(xmlMail);      
      }//end while
    } catch (JMSException je) {
        throw new TransitionException(je);
    }
  }

}