1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *  http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package javax.servlet.http;
21  
22  import java.util.EventListener;
23  
24      /** Objects that are bound to a session may listen to container
25      ** events notifying them that sessions will be passivated and that
26      ** session will be activated. A container that migrates session between VMs
27      ** or persists sessions is required to notify all attributes bound to sessions
28      ** implementing HttpSessionActivationListener.
29      **
30      * @since 2.3
31      */
32      
33  public interface HttpSessionActivationListener extends EventListener { 
34  
35      /** Notification that the session is about to be passivated.*/
36      public void sessionWillPassivate(HttpSessionEvent se); 
37      /** Notification that the session has just been activated.*/
38      public void sessionDidActivate(HttpSessionEvent se);
39  } 
40