jdk-24/test/jdk/java/util/concurrent/CompletableFuture/LostInterrupt.java
2020-12-13 19:17:36 +00:00

74 lines
2.8 KiB
Java

/*
* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
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*/
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.ThreadLocalRandom;
import static java.util.concurrent.TimeUnit.DAYS;
/*
* @test
* @bug 8254350
* @run main LostInterrupt
* @summary CompletableFuture.get may swallow interrupt status
* @key randomness
*/
// TODO: Rewrite as a CompletableFuture tck test ?
/**
* Submits a task that completes immediately, then invokes CompletableFuture.get
* with the interrupt status set. CompletableFuture.get should either complete
* immediately with the interrupt status set, or else throw InterruptedException
* with the interrupt status cleared.
*/
public class LostInterrupt {
static final int ITERATIONS = 10_000;
public static void main(String[] args) throws Exception {
ThreadLocalRandom rnd = ThreadLocalRandom.current();
ForkJoinPool executor = new ForkJoinPool(1);
try {
for (int i = 0; i < ITERATIONS; i++) {
CompletableFuture<String> future = new CompletableFuture<>();
boolean timed = rnd.nextBoolean();
executor.execute(() -> future.complete("foo"));
Thread.currentThread().interrupt();
try {
String result = timed ? future.get(1, DAYS) : future.get();
if (!Thread.interrupted())
throw new AssertionError("lost interrupt, run=" + i);
} catch (InterruptedException expected) {
if (Thread.interrupted())
throw new AssertionError(
"interrupt status not cleared, run=" + i);
}
}
} finally {
executor.shutdown();
}
}
}