1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
5 *
6 * Portions Copyright Apache Software Foundation.
7 *
8 * The contents of this file are subject to the terms of either the GNU
9 * General Public License Version 2 only ("GPL") or the Common Development
10 * and Distribution License("CDDL") (collectively, the "License"). You
11 * may not use this file except in compliance with the License. You can obtain
12 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
13 * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
14 * language governing permissions and limitations under the License.
15 *
16 * When distributing the software, include this License Header Notice in each
17 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
18 * Sun designates this particular file as subject to the "Classpath" exception
19 * as provided by Sun in the GPL Version 2 section of the License file that
20 * accompanied this code. If applicable, add the following below the License
21 * Header, with the fields enclosed by brackets [] replaced by your own
22 * identifying information: "Portions Copyrighted [year]
23 * [name of copyright owner]"
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27 * If you wish your version of this file to be governed by only the CDDL or
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29 * elects to include this software in this distribution under the [CDDL or GPL
30 * Version 2] license." If you don't indicate a single choice of license, a
31 * recipient has the option to distribute your version of this file under
32 * either the CDDL, the GPL Version 2 or to extend the choice of license to
33 * its licensees as provided above. However, if you add GPL Version 2 code
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37 */
38
39 package javax.servlet;
40
41 import java.util.EventListener;
42
43 /** Implementations of this interface receive notifications of
44 ** changes to the attribute list on the servlet context of a web application.
45 * To receive notification events, the implementation class
46 * must be configured in the deployment descriptor for the web application.
47 * @see ServletContextAttributeEvent
48 * @since v 2.3
49 */
50
51 public interface ServletContextAttributeListener extends EventListener {
52 /** Notification that a new attribute was added to the servlet context. Called after the attribute is added.*/
53 public void attributeAdded(ServletContextAttributeEvent scab);
54 /** Notification that an existing attribute has been removed from the servlet context. Called after the attribute is removed.*/
55 public void attributeRemoved(ServletContextAttributeEvent scab);
56 /** Notification that an attribute on the servlet context has been replaced. Called after the attribute is replaced. */
57 public void attributeReplaced(ServletContextAttributeEvent scab);
58 }
59
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