01 /*
02 * Copyright 2004 The Apache Software Foundation
03 *
04 * Licensed under the Apache License, Version 2.0 (the "License");
05 * you may not use this file except in compliance with the License.
06 * You may obtain a copy of the License at
07 *
08 * http://www.apache.org/licenses/LICENSE-2.0
09 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package javax.servlet.http;
17
18 import java.util.EventListener;
19
20 /** Objects that are bound to a session may listen to container
21 ** events notifying them that sessions will be passivated and that
22 ** session will be activated. A container that migrates session between VMs
23 ** or persists sessions is required to notify all attributes bound to sessions
24 ** implementing HttpSessionActivationListener.
25 **
26 * @since 2.3
27 */
28
29 public interface HttpSessionActivationListener extends EventListener {
30
31 /** Notification that the session is about to be passivated.*/
32 public void sessionWillPassivate(HttpSessionEvent se);
33
34 /** Notification that the session has just been activated.*/
35 public void sessionDidActivate(HttpSessionEvent se);
36 }
|