/** 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;	/** 	* Implementations of this interface are notified of changes to the 	* list of active sessions in a web application.	* To receive notification events, the implementation class	* must be configured in the deployment descriptor for the web application.	* @see HttpSessionEvent	 * @since	v 2.3	*/public interface HttpSessionListener extends EventListener {    	/** 	* Notification that a session was created.	* @param se the notification event	*/    public void sessionCreated ( HttpSessionEvent se );    	/** 	* Notification that a session is about to be invalidated.	* @param se the notification event	*/    public void sessionDestroyed ( HttpSessionEvent se );    }