| /* |
| * 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); |
| } |
| |