74 lines
2.8 KiB
Java
74 lines
2.8 KiB
Java
/*
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* Copyright (c) 2020, 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.util.concurrent.CompletableFuture;
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import java.util.concurrent.ForkJoinPool;
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import java.util.concurrent.ThreadLocalRandom;
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import static java.util.concurrent.TimeUnit.DAYS;
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/*
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* @test
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* @bug 8254350
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* @run main LostInterrupt
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* @summary CompletableFuture.get may swallow interrupt status
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* @key randomness
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*/
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// TODO: Rewrite as a CompletableFuture tck test ?
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/**
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* Submits a task that completes immediately, then invokes CompletableFuture.get
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* with the interrupt status set. CompletableFuture.get should either complete
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* immediately with the interrupt status set, or else throw InterruptedException
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* with the interrupt status cleared.
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*/
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public class LostInterrupt {
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static final int ITERATIONS = 10_000;
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public static void main(String[] args) throws Exception {
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ThreadLocalRandom rnd = ThreadLocalRandom.current();
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ForkJoinPool executor = new ForkJoinPool(1);
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try {
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for (int i = 0; i < ITERATIONS; i++) {
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CompletableFuture<String> future = new CompletableFuture<>();
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boolean timed = rnd.nextBoolean();
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executor.execute(() -> future.complete("foo"));
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Thread.currentThread().interrupt();
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try {
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String result = timed ? future.get(1, DAYS) : future.get();
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if (!Thread.interrupted())
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throw new AssertionError("lost interrupt, run=" + i);
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} catch (InterruptedException expected) {
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if (Thread.interrupted())
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throw new AssertionError(
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"interrupt status not cleared, run=" + i);
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}
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}
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} finally {
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executor.shutdown();
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}
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}
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}
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