Listing 2. This implementation of the WebAppServerMXBean class includes an addWebModule() method that is called any time a new WebModule is added to the application server.

public class WebAppServerMXBeanImpl
  extends NEStandardMBean
  implements WebAppServerMXBean {

  // Implementation details removed -- see
  // full source code

  private ArrayList<String> webModules = 
    new ArrayList<String>();
  private String adminEMail;

  public void setAdminEMail(String adminEMail){
    String oldEMail = this.adminEMail;
    this.adminEMail = adminEMail;

    // create and send a notification.
    Notification notif = new Notification(
      "jmxbp.attribute_changed", "hello", 1,
      System.currentTimeMillis(),
      "attribute: AdminEMail, old value: " + 
      oldEMail + ", new value: " + adminEMail);
    sendNotification(notif);
  }

  // non-MBean methods.
  public void addWebModule(String objectName){
    webModules.add(objectName);

    // create and send a notification.
    Notification notif = new Notification(
      "jmxbp.child_added", "hello", 1,
      System.currentTimeMillis(), "test message");
    sendNotification(notif);
  }
}