01 /*
02 * Copyright 2004 The Apache Software Foundation
03 *
04 * Licensed under the Apache License, Version 2.0 (the "License");
05 * you may not use this file except in compliance with the License.
06 * You may obtain a copy of the License at
07 *
08 * http://www.apache.org/licenses/LICENSE-2.0
09 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package javax.servlet;
17
18 import java.util.EventListener;
19
20 /**
21 * A ServletRequestListener can be implemented by the developer
22 * interested in being notified of requests coming in and out of
23 * scope in a web component. A request is defined as coming into
24 * scope when it is about to enter the first servlet or filter
25 * in each web application, as going out of scope when it exits
26 * the last servlet or the first filter in the chain.
27 *
28 * @since Servlet 2.4
29 */
30
31 public interface ServletRequestListener extends EventListener {
32
33 /** The request is about to go out of scope of the web application. */
34 public void requestDestroyed(ServletRequestEvent sre);
35
36 /** The request is about to come into scope of the web application. */
37 public void requestInitialized(ServletRequestEvent sre);
38 }
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