1 /*
2 * The contents of this file are subject to the terms of the Common Development and
3 * Distribution License (the License). You may not use this file except in compliance with the
4 * License.
5 *
6 * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
7 * specific language governing permission and limitations under the License.
8 *
9 * When distributing Covered Software, include this CDDL Header Notice in each file and include
10 * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
11 * Header, with the fields enclosed by brackets [] replaced by your own identifying
12 * information: "Portions copyright [year] [name of copyright owner]".
13 *
14 * Copyright 2012-2015 ForgeRock AS.
15 */
16
17 package org.forgerock.http.servlet;
18
19 import jakarta.servlet.http.HttpServletRequest;
20 import jakarta.servlet.http.HttpServletResponse;
21 import java.util.concurrent.CountDownLatch;
22
23 /**
24 * An adapter for use in Servlet 2.x containers.
25 */
26 final class Servlet2Adapter implements ServletVersionAdapter {
27
28 /**
29 * Synchronization implementation. Package private because it is used as the
30 * fall-back implementation in Servlet 3 when async is not supported.
31 */
32 final static class Servlet2Synchronizer implements ServletSynchronizer {
33 private final CountDownLatch requestCompletionLatch = new CountDownLatch(1);
34 private Runnable listener;
35
36 Servlet2Synchronizer() {
37 // Nothing to do.
38 }
39
40 @Override
41 public void setAsyncListener(Runnable runnable) {
42 listener = runnable;
43 }
44
45 @Override
46 public void awaitIfNeeded() throws InterruptedException {
47 requestCompletionLatch.await();
48 if (listener != null) {
49 listener.run();
50 }
51 }
52
53 @Override
54 public void signalAndComplete() {
55 requestCompletionLatch.countDown();
56 }
57 }
58
59 Servlet2Adapter() {
60 // Nothing to do.
61 }
62
63 @Override
64 public ServletSynchronizer createServletSynchronizer(HttpServletRequest httpRequest,
65 HttpServletResponse httpResponse) {
66 return new Servlet2Synchronizer();
67 }
68 }