test/jdk/java/net/httpclient/SmallTimeout.java
author chegar
Wed, 02 May 2018 02:36:17 -0700
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child 56507 2294c51eae30
permissions -rw-r--r--
8202423: Small HTTP Client refresh Reviewed-by: chegar, dfuchs, michaelm, prappo Contributed-by: Chris Hegarty <chris.hegarty@oracle.com>, Daniel Fuchs <daniel.fuchs@oracle.com>, Michael McMahon <michael.x.mcmahon@oracle.com>, Pavel Rappo <pavel.rappo@oracle.com>
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/*
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 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.ServerSocket;
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import java.net.URI;
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import java.net.http.HttpClient;
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import java.net.http.HttpRequest;
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import java.net.http.HttpResponse;
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import java.net.http.HttpResponse.BodyHandlers;
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import java.net.http.HttpTimeoutException;
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import java.time.Duration;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.LinkedBlockingQueue;
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import static java.lang.System.out;
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/**
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 * @test
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 * @bug 8178147
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 * @modules java.net.http/jdk.internal.net.http.common
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 * @summary Ensures that small timeouts do not cause hangs due to race conditions
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 * @run main/othervm -Djdk.internal.httpclient.debug=true SmallTimeout
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 */
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// To enable logging use. Not enabled by default as it changes the dynamics
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// of the test.
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// @run main/othervm -Djdk.httpclient.HttpClient.log=all,frames:all SmallTimeout
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public class SmallTimeout {
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    static int[] TIMEOUTS = {2, 1, 3, 2, 100, 1};
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    // A queue for placing timed out requests so that their order can be checked.
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    static LinkedBlockingQueue<HttpResult> queue = new LinkedBlockingQueue<>();
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    static final class HttpResult {
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         final HttpRequest request;
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         final Throwable   failed;
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         HttpResult(HttpRequest request, Throwable   failed) {
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             this.request = request;
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             this.failed = failed;
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         }
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         static HttpResult of(HttpRequest request) {
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             return new HttpResult(request, null);
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         }
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         static HttpResult of(HttpRequest request, Throwable t) {
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             return new HttpResult(request, t);
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         }
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    }
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    static volatile boolean error;
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    public static void main(String[] args) throws Exception {
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        HttpClient client = HttpClient.newHttpClient();
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        ReferenceTracker.INSTANCE.track(client);
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        Throwable failed = null;
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        try (ServerSocket ss = new ServerSocket()) {
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            ss.setReuseAddress(false);
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            ss.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));
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            int port = ss.getLocalPort();
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            URI u = new URI("http://localhost:" + port + "/");
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            HttpRequest[] requests = new HttpRequest[TIMEOUTS.length];
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            out.println("--- TESTING Async");
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            for (int i = 0; i < TIMEOUTS.length; i++) {
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                final int n = i;
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                URI uri = new URI(u.toString() + "/r" + n);
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                requests[i] = HttpRequest.newBuilder(uri)
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                                         .timeout(Duration.ofMillis(TIMEOUTS[i]))
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                                         .GET()
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                                         .build();
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                final HttpRequest req = requests[i];
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                CompletableFuture<HttpResponse<Object>> response = client
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                    .sendAsync(req, BodyHandlers.replacing(null))
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                    .whenComplete((HttpResponse<Object> r, Throwable t) -> {
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                        Throwable cause = null;
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                        if (r != null) {
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                            out.println("Unexpected response for r" + n + ": " + r);
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                            cause = new RuntimeException("Unexpected response for r" + n);
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                            error = true;
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                        }
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                        if (t != null) {
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                            if (!(t.getCause() instanceof HttpTimeoutException)) {
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                                out.println("Wrong exception type for r" + n + ":" + t.toString());
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                                Throwable c = t.getCause() == null ? t : t.getCause();
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                                c.printStackTrace();
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                                cause = c;
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                                error = true;
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                            } else {
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                                out.println("Caught expected timeout for r" + n +": " + t.getCause());
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                            }
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                        }
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                        if (t == null && r == null) {
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                            out.println("Both response and throwable are null for r" + n + "!");
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                            cause = new RuntimeException("Both response and throwable are null for r"
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                                    + n + "!");
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                            error = true;
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                        }
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                        queue.add(HttpResult.of(req,cause));
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                    });
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            }
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            System.out.println("All requests submitted. Waiting ...");
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            checkReturn(requests);
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            if (error)
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                throw new RuntimeException("Failed. Check output");
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            // Repeat blocking in separate threads. Use queue to wait.
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            out.println("--- TESTING Sync");
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            System.err.println("================= TESTING Sync =====================");
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            // For running blocking response tasks
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            ExecutorService executor = Executors.newCachedThreadPool();
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            for (int i = 0; i < TIMEOUTS.length; i++) {
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                final int n = i;
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                URI uri = new URI(u.toString()+"/sync/r" + n);
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                requests[i] = HttpRequest.newBuilder(uri)
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                                         .timeout(Duration.ofMillis(TIMEOUTS[i]))
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                                         .GET()
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                                         .build();
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                final HttpRequest req = requests[i];
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                executor.execute(() -> {
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                    Throwable cause = null;
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                    try {
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                        HttpResponse<?> r = client.send(req, BodyHandlers.replacing(null));
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                        out.println("Unexpected success for r" + n +": " + r);
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                    } catch (HttpTimeoutException e) {
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                        out.println("Caught expected timeout for r" + n +": " + e);
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                    } catch (Throwable ee) {
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                        Throwable c = ee.getCause() == null ? ee : ee.getCause();
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                        out.println("Unexpected exception for r" + n + ": " + c);
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                        c.printStackTrace();
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                        cause = c;
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                        error = true;
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                    } finally {
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                        queue.offer(HttpResult.of(req, cause));
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                    }
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                });
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            }
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            System.out.println("All requests submitted. Waiting ...");
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            checkReturn(requests);
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            executor.shutdownNow();
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            if (error)
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                throw new RuntimeException("Failed. Check output");
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        } catch (Throwable t) {
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            failed = t;
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            throw t;
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        } finally {
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            try {
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                Thread.sleep(100);
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            } catch (InterruptedException t) {
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                // ignore;
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            }
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            AssertionError trackFailed = ReferenceTracker.INSTANCE.check(500);
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            if (trackFailed != null) {
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                if (failed != null) {
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                    failed.addSuppressed(trackFailed);
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                    if (failed instanceof Exception) throw (Exception) failed;
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                    if (failed instanceof Error) throw (Exception) failed;
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                }
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                throw trackFailed;
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            }
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        }
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    }
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    static void checkReturn(HttpRequest[] requests) throws InterruptedException {
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        // wait for exceptions and check order
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        boolean ok = true;
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        for (int j = 0; j < TIMEOUTS.length; j++) {
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            HttpResult res = queue.take();
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            HttpRequest req = res.request;
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            out.println("Got request from queue " + req + ", order: " + getRequest(req, requests)
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                         + (res.failed == null ? "" : " failed: " + res.failed));
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            ok = ok && res.failed == null;
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        }
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        out.println("Return " + (ok ? "ok" : "nok"));
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    }
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    /** Returns the index of the request in the array. */
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    static String getRequest(HttpRequest req, HttpRequest[] requests) {
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        for (int i=0; i<requests.length; i++) {
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            if (req == requests[i]) {
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                return "r" + i;
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            }
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        }
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        throw new AssertionError("Unknown request: " + req);
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    }
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}