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         * A ServletRequestListener can be implemented by the developer
026         * interested in being notified of requests coming in and out of
027         * scope in a web component. A request is defined as coming into
028         * scope when it is about to enter the first servlet or filter
029         * in each web application, as going out of scope when it exits
030         * the last servlet or the first filter in the chain.
031         *
032         * @since Servlet 2.4
033         */
034    
035    
036    public interface ServletRequestListener extends EventListener {
037    
038        /** The request is about to go out of scope of the web application. */
039        public void requestDestroyed ( ServletRequestEvent sre );
040    
041        /** The request is about to come into scope of the web application. */
042        public void requestInitialized ( ServletRequestEvent sre );
043    }