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