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    //
021    // This source code implements specifications defined by the Java
022    // Community Process. In order to remain compliant with the specification
023    // DO NOT add / change / or delete method signatures!
024    //
025    
026    package javax.servlet;
027    
028    import java.util.EventListener;
029    
030    /**
031     * Implementations of this interface recieve notifications about changes
032     * to the servlet context of the web application they are part of.
033     * To recieve notification events, the implementation class
034     * must be configured in the deployment descriptor for the web application.
035     *
036     * @see ServletContextEvent
037     *
038     * @since Servlet 2.3
039     *
040     * @version $Rev: 467553 $ $Date: 2006-10-24 21:01:51 -0700 (Tue, 24 Oct 2006) $
041     */
042    public interface ServletContextListener extends EventListener {
043        /**
044         * Notification that the web application initialization
045         * process is starting.
046         * All ServletContextListeners are notified of context
047         * initialisation before any filter or servlet in the web
048         * application is initialized.
049         */
050        public void contextInitialized(ServletContextEvent sce);
051    
052        /**
053         * Notification that the servlet context is about to be shut down. All servlets
054         * have been destroy()ed before any ServletContextListeners are notified of context
055         * destruction.
056         */
057        public void contextDestroyed(ServletContextEvent sce);
058    }
059