/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package javax.servlet.http;
import java.util.EventListener;
/**
* Causes an object to be notified when it is bound to
* or unbound from a session. The object is notified
* by an {@link HttpSessionBindingEvent} object. This may be as a result
* of a servlet programmer explicitly unbinding an attribute from a session,
* due to a session being invalidated, or due to a session timing out.
*
*
* @author Various
* @version $Version$
*
* @see HttpSession
* @see HttpSessionBindingEvent
*/
public interface HttpSessionBindingListener extends EventListener {
/**
*
* Notifies the object that it is being bound to
* a session and identifies the session.
*
* @param event the event that identifies the
* session
*
* @see #valueUnbound
*
*/
public void valueBound(HttpSessionBindingEvent event);
/**
*
* Notifies the object that it is being unbound
* from a session and identifies the session.
*
* @param event the event that identifies
* the session
*
* @see #valueBound
*
*/
public void valueUnbound(HttpSessionBindingEvent event);
}