mailinvoicetransitiondelegate.java

sun公司的petstore,一个J2ee的示例应用程序.

/*
 * 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
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 *
 * - Redistributions of source code must retain the above copyright
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 *
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 * 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
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 * 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 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 MailInvoice MDB
 */
public class MailInvoiceTransitionDelegate implements TransitionDelegate {

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

  public MailInvoiceTransitionDelegate() { }

  /**
   * 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 = info.getXMLMessage();

    try {
      if (xmlMail != null) {
        mailHelper.sendMessage(xmlMail);
      }
    } catch (JMSException je) {
        throw new TransitionException(je);
    }
  }

}