/*
 * 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.
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package jakarta.servlet.http;

import java.util.EventListener;

This listener interface can be implemented in order to get notifications of changes to the attribute lists of sessions within this web application.
Since:v 2.3
/** * This listener interface can be implemented in order to get notifications of * changes to the attribute lists of sessions within this web application. * * @since v 2.3 */
public interface HttpSessionAttributeListener extends EventListener {
Notification that an attribute has been added to a session. Called after the attribute is added. The default implementation is a NO-OP.
Params:
  • se – Information about the added attribute
/** * Notification that an attribute has been added to a session. Called after * the attribute is added. * The default implementation is a NO-OP. * * @param se Information about the added attribute */
public default void attributeAdded(HttpSessionBindingEvent se) { }
Notification that an attribute has been removed from a session. Called after the attribute is removed. The default implementation is a NO-OP.
Params:
  • se – Information about the removed attribute
/** * Notification that an attribute has been removed from a session. Called * after the attribute is removed. * The default implementation is a NO-OP. * * @param se Information about the removed attribute */
public default void attributeRemoved(HttpSessionBindingEvent se) { }
Notification that an attribute has been replaced in a session. Called after the attribute is replaced. The default implementation is a NO-OP.
Params:
  • se – Information about the replaced attribute
/** * Notification that an attribute has been replaced in a session. Called * after the attribute is replaced. * The default implementation is a NO-OP. * * @param se Information about the replaced attribute */
public default void attributeReplaced(HttpSessionBindingEvent se) { } }