1
2
3 /*
4 * The contents of this file are subject to the terms
5 * of the Common Development and Distribution License
6 * (the "License"). You may not use this file except
7 * in compliance with the License.
8 *
9 * You can obtain a copy of the license at
10 * glassfish/bootstrap/legal/CDDLv1.0.txt or
11 * https://glassfish.dev.java.net/public/CDDLv1.0.html.
12 * See the License for the specific language governing
13 * permissions and limitations under the License.
14 *
15 * When distributing Covered Code, include this CDDL
16 * HEADER in each file and include the License file at
17 * glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
18 * add the following below this CDDL HEADER, with the
19 * fields enclosed by brackets "[]" replaced with your
20 * own identifying information: Portions Copyright [yyyy]
21 * [name of copyright owner]
22 *
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 *
25 * Portions Copyright Apache Software Foundation.
26 */
27
28 package javax.servlet;
29
30 import java.util.EventListener;
31
32 /**
33 * A ServletRequestAttributeListener can be implemented by the
34 * developer interested in being notified of request attribute
35 * changes. Notifications will be generated while the request
36 * is within the scope of the web application in which the listener
37 * is registered. A request is defined as coming into scope when
38 * it is about to enter the first servlet or filter in each web
39 * application, as going out of scope when it exits the last servlet
40 * or the first filter in the chain.
41 *
42 * @since Servlet 2.4
43 */
44
45 public interface ServletRequestAttributeListener extends EventListener {
46 /** Notification that a new attribute was added to the
47 ** servlet request. Called after the attribute is added.
48 */
49 public void attributeAdded(ServletRequestAttributeEvent srae);
50
51 /** Notification that an existing attribute has been removed from the
52 ** servlet request. Called after the attribute is removed.
53 */
54 public void attributeRemoved(ServletRequestAttributeEvent srae);
55
56 /** Notification that an attribute was replaced on the
57 ** servlet request. Called after the attribute is replaced.
58 */
59 public void attributeReplaced(ServletRequestAttributeEvent srae);
60 }
61