001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019 020 package javax.servlet; 021 022 import java.util.EventListener; 023 024 /** 025 * Implementations of this interface receive notifications about 026 * changes to the servlet context of the web application they are 027 * part of. 028 * To receive notification events, the implementation class 029 * must be configured in the deployment descriptor for the web 030 * application. 031 * @see ServletContextEvent 032 * @since v 2.3 033 */ 034 035 public interface ServletContextListener extends EventListener { 036 /** 037 ** Notification that the web application initialization 038 ** process is starting. 039 ** All ServletContextListeners are notified of context 040 ** initialization before any filter or servlet in the web 041 ** application is initialized. 042 */ 043 044 public void contextInitialized ( ServletContextEvent sce ); 045 046 /** 047 ** Notification that the servlet context is about to be shut down. 048 ** All servlets and filters have been destroy()ed before any 049 ** ServletContextListeners are notified of context 050 ** destruction. 051 */ 052 public void contextDestroyed ( ServletContextEvent sce ); 053 } 054