/*
* 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.
*/
package javax.servlet;
import java.util.EventListener;
/**
* A ServletRequestAttributeListener can be implemented by the
* developer interested in being notified of request attribute
* changes. Notifications will be generated while the request
* is within the scope of the web application in which the listener
* is registered. A request is defined as coming into scope when
* it is about to enter the first servlet or filter in each web
* application, as going out of scope when it exits the last servlet
* or the first filter in the chain.
*
* @since Servlet 2.4
* @version $Rev$ $Date$
*/
public interface ServletRequestAttributeListener extends EventListener {
/**
* Notification that a new attribute was added to the
* * servlet request. Called after the attribute is added.
* @param srae event for attribute added
*/
void attributeAdded(ServletRequestAttributeEvent srae);
/**
* Notification that an existing attribute has been removed from the
* * servlet request. Called after the attribute is removed.
* @param srae event for attribute removed
*/
void attributeRemoved(ServletRequestAttributeEvent srae);
/**
* Notification that an attribute was replaced on the
* * servlet request. Called after the attribute is replaced.
* @param srae event for attribute replaced
*/
void attributeReplaced(ServletRequestAttributeEvent srae);
}