2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 package javax.servlet.http;
20 import java.util.EventListener;
23 * Causes an object to be notified when it is bound to or unbound from a
24 * session. The object is notified by an {@link HttpSessionBindingEvent} object.
25 * This may be as a result of a servlet programmer explicitly unbinding an
26 * attribute from a session, due to a session being invalidated, or due to a
30 * @see HttpSessionBindingEvent
32 public interface HttpSessionBindingListener extends EventListener {
35 * Notifies the object that it is being bound to a session and identifies
39 * the event that identifies the session
42 public void valueBound(HttpSessionBindingEvent event);
45 * Notifies the object that it is being unbound from a session and
46 * identifies the session.
49 * the event that identifies the session
52 public void valueUnbound(HttpSessionBindingEvent event);