HttpSessionAttributeListener


1   /*
2   * Licensed to the Apache Software Foundation (ASF) under one or more
3   * contributor license agreements.  See the NOTICE file distributed with
4   * this work for additional information regarding copyright ownership.
5   * The ASF licenses this file to You under the Apache License, Version 2.0
6   * (the "License"); you may not use this file except in compliance with
7   * the License.  You may obtain a copy of the License at
8   *
9   *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17  package javax.servlet.http;
18  
19  import java.util.EventListener  ;
20  
21      /** This listener interface can be implemented in order to
22      * get notifications of changes to the attribute lists of sessions within
23      * this web application.
24      * @since    v 2.3
25  */
26  
27  public interface HttpSessionAttributeListener extends EventListener   {
28      /** Notification that an attribute has been added to a session. Called after the attribute is added.*/
29      public void attributeAdded ( HttpSessionBindingEvent   se );
30      /** Notification that an attribute has been removed from a session. Called after the attribute is removed. */
31      public void attributeRemoved ( HttpSessionBindingEvent   se );
32      /** Notification that an attribute has been replaced in a session. Called after the attribute is replaced. */
33      public void attributeReplaced ( HttpSessionBindingEvent   se );
34  
35  }
36  
37

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