/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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;

	/** This listener interface can be implemented in order to
	* get notifications of changes to the attribute lists of sessions within
	* this web application.
	* @since	v 2.3
*/

public interface HttpSessionAttributeListener extends EventListener {
	/** Notification that an attribute has been added to a session. Called after the attribute is added.*/
    public void attributeAdded ( HttpSessionBindingEvent se );
	/** Notification that an attribute has been removed from a session. Called after the attribute is removed. */
    public void attributeRemoved ( HttpSessionBindingEvent se );
	/** Notification that an attribute has been replaced in a session. Called after the attribute is replaced. */
    public void attributeReplaced ( HttpSessionBindingEvent se );

}