/*
 * 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 about
 * changes to the servlet context of the web application they are
 * part of.
 * To receive notification events, the implementation class
 * must be configured in the deployment descriptor for the web
 * application.
 *
 * @version $Rev$ $Date$
 * @see ServletContextEvent
 * @since v 2.3
 */

public interface ServletContextListener extends EventListener {

    /**
     * Notification that the web application initialization
     * process is starting.
     * All ServletContextListeners are notified of context
     * initialization before any filter or servlet in the web
     * application is initialized.
     */
    void contextInitialized(ServletContextEvent sce);

    /**
     * Notification that the servlet context is about to be shut down.
     * All servlets and filters have been destroy()ed before any
     * ServletContextListeners are notified of context
     * destruction.
     */
    void contextDestroyed(ServletContextEvent sce);
    
}