/*
 * 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;

Implementations of this interface are notified when an HttpSession's ID changes. To receive notification events, the implementation class must be configured in the deployment descriptor for the web application, annotated with WebListener or registered by calling an addListener method on the ServletContext. 
See Also:
HttpSessionEvent
HttpServletRequest.changeSessionId()
Since:
Servlet 3.1/**
 * Implementations of this interface are notified when an {@link HttpSession}'s
 * ID changes. To receive notification events, the implementation class must be
 * configured in the deployment descriptor for the web application, annotated
 * with {@link javax.servlet.annotation.WebListener} or registered by calling an
 * addListener method on the {@link javax.servlet.ServletContext}.
 *
 * @see HttpSessionEvent
 * @see HttpServletRequest#changeSessionId()
 * @since Servlet 3.1
 */
public interface HttpSessionIdListener extends EventListener {

    
Notification that a session ID has been changed.
Params:
se – the notification event
oldSessionId – the old session ID/**
     * Notification that a session ID has been changed.
     *
     * @param se the notification event
     * @param oldSessionId the old session ID
     */
    public void sessionIdChanged(HttpSessionEvent se, String oldSessionId);
}