| /* |
| * Copyright 2004 The Apache Software Foundation |
| * |
| * Licensed 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 |
| */ |
| |
| public interface ServletRequestAttributeListener extends EventListener { |
| /** Notification that a new attribute was added to the |
| ** servlet request. Called after the attribute is added. |
| */ |
| public void attributeAdded(ServletRequestAttributeEvent srae); |
| |
| /** Notification that an existing attribute has been removed from the |
| ** servlet request. Called after the attribute is removed. |
| */ |
| public void attributeRemoved(ServletRequestAttributeEvent srae); |
| |
| /** Notification that an attribute was replaced on the |
| ** servlet request. Called after the attribute is replaced. |
| */ |
| public void attributeReplaced(ServletRequestAttributeEvent srae); |
| } |
| |