ListenerInfo


1   /*
2    * The contents of this file are subject to the terms 
3    * of the Common Development and Distribution License 
4    * (the License).  You may not use this file except in
5    * compliance with the License.
6    * 
7    * You can obtain a copy of the license at 
8    * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9    * glassfish/bootstrap/legal/CDDLv1.0.txt.
10   * See the License for the specific language governing 
11   * permissions and limitations under the License.
12   * 
13   * When distributing Covered Code, include this CDDL 
14   * Header Notice in each file and include the License file 
15   * at glassfish/bootstrap/legal/CDDLv1.0.txt.  
16   * If applicable, add the following below the CDDL Header, 
17   * with the fields enclosed by brackets [] replaced by
18   * you own identifying information: 
19   * "Portions Copyrighted [year] [name of copyright owner]"
20   * 
21   * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22   */
23  
24  package com.sun.enterprise.admin.jmx.remote.notification;
25  
26  import javax.management.*;
27  
28  /**
29   * This class is a composite of a NotificationListener, NotificationFilter and a handback object.
30   * The listener, filter and handback objects that are being registered by the client
31   * via a call to addNotificationListener are set into a new ListenerInfo object.
32   * This ListenerInfo object is then registered in the NotificationManagers.
33   */
34  public class ListenerInfo {
35      public Object   proxy = null;
36      public NotificationListener listener = null;
37      public NotificationFilter filter = null;
38      public Object   handback = null;
39      public String   id = null;
40  
41      public ListenerInfo() {
42      }
43  
44      public ListenerInfo(NotificationListener listener, NotificationFilter filter, Object   handback) {
45          this.listener = listener;
46          this.filter = filter;
47          this.handback = handback;
48          id = computeId();
49      }
50  
51      /**
52       * Compute an id for this object.
53       * The id generated by this method is used to match a listener, filter, handback combination
54       * both on the server-side and client-side
55       */
56      public String   computeId() {
57          String   listenerCode = "null";
58          if (listener != null)
59              listenerCode = Integer.toString(listener.hashCode());
60          String   filterCode = "null";
61          if (filter != null)
62              filterCode = Integer.toString(filter.hashCode());
63          String   handbackCode = "null";
64          if (handback != null)
65              handbackCode = Integer.toString(handback.hashCode());
66          return  ( listenerCode + ":" + filterCode + ":" + handbackCode );
67      }
68  }
69  
70
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags