test/jdk/java/net/httpclient/SmallTimeout.java
author erikj
Tue, 12 Sep 2017 19:03:39 +0200
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parent 44639 jdk/test/java/net/httpclient/SmallTimeout.java@5c2838d882a5
child 48083 b1c1b4ef4be2
permissions -rw-r--r--
8187443: Forest Consolidation: Move files to unified layout Reviewed-by: darcy, ihse
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/*
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 * Copyright (c) 2015, 2017, 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.io.IOException;
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import java.net.ServerSocket;
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import java.net.URI;
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import jdk.incubator.http.HttpClient;
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import jdk.incubator.http.HttpRequest;
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import jdk.incubator.http.HttpResponse;
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import jdk.incubator.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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import static jdk.incubator.http.HttpResponse.BodyHandler.discard;
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/**
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 * @test
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 * @bug 8178147
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 * @summary Ensures that small timeouts do not cause hangs due to race conditions
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 * @run main/othervm 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<HttpRequest> queue = new LinkedBlockingQueue<>();
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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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        try (ServerSocket ss = new ServerSocket(0, 20)) {
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            int port = ss.getLocalPort();
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            URI uri = new URI("http://127.0.0.1:" + 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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                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, discard(null))
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                    .whenComplete((HttpResponse<Object> r, Throwable t) -> {
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                        if (r != null) {
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                            out.println("Unexpected response: " + r);
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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:" + t.toString());
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                                Throwable c = t.getCause() == null ? t : t.getCause();
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                                c.printStackTrace();
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                                error = true;
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                            } else {
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                                out.println("Caught expected timeout: " + 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!");
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                            error = true;
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                        }
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                        queue.add(req);
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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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            // 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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                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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                    try {
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                        client.send(req, discard(null));
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                    } catch (HttpTimeoutException e) {
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                        out.println("Caught expected timeout: " + e);
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                        queue.offer(req);
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                    } catch (IOException | InterruptedException ee) {
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                        Throwable c = ee.getCause() == null ? ee : ee.getCause();
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                        c.printStackTrace();
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                        error = true;
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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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        } finally {
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            ((ExecutorService) client.executor()).shutdownNow();
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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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        for (int j = 0; j < TIMEOUTS.length; j++) {
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            HttpRequest req = queue.take();
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            out.println("Got request from queue " + req + ", order: " + getRequest(req, requests));
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        }
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        out.println("Return ok");
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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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}