| /* |
| * 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; |
| |
| /** |
| * Implementations of this interface receive notifications of changes to the |
| * attribute list on the servlet context of a web application. To receive |
| * notification events, the implementation class must be configured in the |
| * deployment descriptor for the web application. |
| * |
| * @see ServletContextAttributeEvent |
| * @since v 2.3 |
| */ |
| |
| public interface ServletContextAttributeListener extends EventListener { |
| /** |
| * Notification that a new attribute was added to the servlet context. |
| * Called after the attribute is added. |
| * @param scae Information about the new attribute |
| */ |
| public void attributeAdded(ServletContextAttributeEvent scae); |
| |
| /** |
| * Notification that an existing attribute has been removed from the servlet |
| * context. Called after the attribute is removed. |
| * @param scae Information about the removed attribute |
| */ |
| public void attributeRemoved(ServletContextAttributeEvent scae); |
| |
| /** |
| * Notification that an attribute on the servlet context has been replaced. |
| * Called after the attribute is replaced. |
| * @param scae Information about the replaced attribute |
| */ |
| public void attributeReplaced(ServletContextAttributeEvent scae); |
| } |