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/*
* 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.
*
* @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);
}
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