package com.oreilly.jent.jms;

/**
 * In general, you may use the code in this book in your programs and 
 * documentation. You do not need to contact us for permission unless 
 * you're reproducing a significant portion of the code. For example, 
 * writing a program that uses several chunks of code from this book does 
 * not require permission. Selling or distributing a CD-ROM of examples 
 * from O'Reilly books does require permission. Answering a question by 
 * citing this book and quoting example code does not require permission. 
 * Incorporating a significant amount of example code from this book into 
 * your product's documentation does require permission.
 * 
 * We appreciate, but do not require, attribution. An attribution usually 
 * includes the title, author, publisher, and ISBN. For example: 
 * 
 *   "Java Enterprise in a Nutshell, Third Edition, 
 *    by Jim Farley and William Crawford 
 *    with Prakash Malani, John G. Norman, and Justin Gehtland. 
 *    Copyright 2006 O'Reilly Media, Inc., 0-596-10142-2."
 *  
 *  If you feel your use of code examples falls outside fair use or the 
 *  permission given above, feel free to contact us at 
 *  permissions@oreilly.com.
 */

/**
 * TextLogger: A simple message listener that logs text messages.
 */

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.TextMessage;

public class TextLogger implements MessageListener {
  // Default constructor
  public TextLogger() {}

  // Message handler
  public void onMessage(Message msg) {
    // If it's a text message, print it to stdout
    if (msg instanceof TextMessage) {
      TextMessage tMsg = (TextMessage)msg;
      try {
        System.out.println("Received message: " + tMsg.getText());
      }
      catch (JMSException je) {
        System.out.println("Error retrieving message text: " +
                           je.getMessage());
      }
    }
    // For other types of messages, print an error
    else {
      System.out.println("Unsupported message type encountered.");
    }
  }
}