package com.oreilly.jent.jndi;

/**
 * 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.
 */

/**
 * ObjectChangeLogger: A sample ObjectChangeListener that simply prints
 *   information about the object change events it encounters.
 */

import javax.naming.Binding;
import javax.naming.event.NamingEvent;
import javax.naming.event.NamingExceptionEvent;
import javax.naming.event.ObjectChangeListener;

public class ObjectChangeLogger implements ObjectChangeListener {
  // Default constructor
  public ObjectChangeLogger() {}

  // Callback for object change events
  public void objectChanged(NamingEvent ev) {
    Binding bNew = ev.getNewBinding();
    Binding bOld = ev.getOldBinding();
    System.out.println("--> CHANGE: Object of type " + bNew.getClassName() +
                       " changed, previous binding = \"" + bOld.toString() +
                       "\" post-change binding = \"" + bNew.toString() + "\"");
  }

  // Callback for errors in the naming service
  public void namingExceptionThrown(NamingExceptionEvent ev) {
    System.out.println("--> ERROR: An error occurred in the naming service:");
    ev.getException().printStackTrace();
  }
}