/*
 *
 * 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 OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT OF OR
 * RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE OR
 * ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE
 * FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT,
 * SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF
 * THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS
 * BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that this software is not designed, licensed or
 * intended for use in the design, construction, operation or
 * maintenance of any nuclear facility.
 * 
 */
import javax.ejb.*;
import javax.naming.*;
import javax.jms.*;

/**
 * The ReplyMsgBean class is a message-driven bean. It
 * implements the javax.ejb.MessageDrivenBean and 
 * javax.jms.MessageListener interfaces. It is defined as public 
 * (but not final or abstract).  It defines a constructor and the
 * methods ejbCreate, onMessage, setMessageDrivenContext, and
 * ejbRemove.
 */
public class ReplyMsgBean implements MessageDrivenBean, 
        MessageListener {

    private transient MessageDrivenContext mdc = null;
    private transient TopicConnectionFactory tcf = null;
    
    /**
     * Constructor, which is public and takes no arguments.
     */
    public ReplyMsgBean() {
        System.out.println("In " +
            "ReplyMsgBean.ReplyMsgBean()");
    }

    /**
     * setMessageDrivenContext method, declared as public (but 
     * not final or static), with a return type of void, and
     * with one argument of type javax.ejb.MessageDrivenContext.
     *
     * @param mdc    the context to set
     */
    public void setMessageDrivenContext(MessageDrivenContext mdc)
    {
        System.out.println("In " +
            "ReplyMsgBean.setMessageDrivenContext()");
        this.mdc = mdc;
    }

    /**
     * ejbCreate method, declared as public (but not final or 
     * static), with a return type of void, and with no 
     * arguments. It looks up the topic connection factory.
     */
    public void ejbCreate() {
        System.out.println("In ReplyMsgBean.ejbCreate()");
        try {
            Context initial = new InitialContext();
            tcf = (TopicConnectionFactory)
      initial.lookup("java:comp/env/jms/TopicConnectionFactory");
        } catch (Exception ex) {
            System.err.println("ReplyMsgBean.ejbCreate: " +
                "Exception: " + ex.toString());
        }
    }

    /**
     * onMessage method, declared as public (but not final or 
     * static), with a return type of void, and with one argument
     * of type javax.jms.Message.
     *
     * It displays the contents of the message and creates a
     * connection, session, and publisher for the reply, using
     * the JMSReplyTo field of the incoming message as the
     * destination.  It creates and publishes a reply message,
     * setting the JMSCorrelationID header field to the message
     * ID of the incoming message, and the id property to that of
     * the incoming message.  It then closes the topic
     * connection.
     *
     * @param inMessage	the incoming message
     */
    public void onMessage(Message inMessage) {
        TextMessage msg = null;
        TopicConnection tc = null;
        TopicSession ts = null;
        TopicPublisher tp = null;
        TextMessage replyMsg = null;

        try {
            if (inMessage instanceof TextMessage) {
                msg = (TextMessage) inMessage;
                System.out.println("  ReplyMsgBean: " +
                    "Received message: " + msg.getText());
                tc = tcf.createTopicConnection();
                ts = tc.createTopicSession(true, 0);

                tp = 
                  ts.createPublisher((Topic)msg.getJMSReplyTo());
                replyMsg = 
                    ts.createTextMessage("ReplyMsgBean " +
                        "processed message: " + msg.getText());
             replyMsg.setJMSCorrelationID(msg.getJMSMessageID());
                replyMsg.setIntProperty("id", 
                    msg.getIntProperty("id"));
                tp.publish(replyMsg);
                tc.close();
            } else {
                System.err.println("Message of wrong type: " + 
                    inMessage.getClass().getName());
            }
        } catch (JMSException e) {
            System.err.println("ReplyMsgBean.onMessage: " +
                "JMSException: " + e.toString());
        } catch (Throwable te) {
            System.err.println("ReplyMsgBean.onMessage: " +
                "Exception: " + te.toString());
        }
    }
    
    /**
     * ejbRemove method, declared as public (but not final or 
     * static), with a return type of void, and with no 
     * arguments.
     */
    public void ejbRemove() {
        System.out.println("In ReplyMsgBean.ejbRemove()");
    }
}