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