112 lines
4.5 KiB
Java
112 lines
4.5 KiB
Java
/*
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* Copyright (c) 2006, 2011, 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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/*
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* @test
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* @bug 6399443
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* @summary Check for auto-shutdown and gc of singleThreadExecutors
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* @library /lib/testlibrary/
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* @run main/othervm/timeout=1000 AutoShutdown
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* @author Martin Buchholz
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*/
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import static java.util.concurrent.Executors.defaultThreadFactory;
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import static java.util.concurrent.Executors.newSingleThreadExecutor;
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import static java.util.concurrent.TimeUnit.MILLISECONDS;
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import java.lang.ref.WeakReference;
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import java.util.Arrays;
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import java.util.concurrent.ConcurrentLinkedQueue;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.Executor;
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import java.util.concurrent.TimeUnit;
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import jdk.testlibrary.Utils;
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public class AutoShutdown {
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static final long LONG_DELAY_MS = Utils.adjustTimeout(10_000);
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static void await(CountDownLatch latch) throws InterruptedException {
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if (!latch.await(LONG_DELAY_MS, MILLISECONDS))
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throw new AssertionError("timed out waiting for latch");
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}
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private static void realMain(String[] args) throws Throwable {
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final Executor[] executors = {
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newSingleThreadExecutor(),
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newSingleThreadExecutor(defaultThreadFactory()),
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// TODO: should these executors also auto-shutdown?
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//newFixedThreadPool(1),
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//newSingleThreadScheduledExecutor(),
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//newSingleThreadScheduledExecutor(defaultThreadFactory()),
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};
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final ConcurrentLinkedQueue<WeakReference<Thread>> poolThreads
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= new ConcurrentLinkedQueue<>();
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final CountDownLatch threadStarted
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= new CountDownLatch(executors.length);
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final CountDownLatch pleaseProceed
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= new CountDownLatch(1);
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Runnable task = new Runnable() { public void run() {
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try {
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poolThreads.add(new WeakReference<>(Thread.currentThread()));
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threadStarted.countDown();
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await(pleaseProceed);
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} catch (Throwable t) { unexpected(t); }
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}};
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for (Executor executor : executors)
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executor.execute(task);
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await(threadStarted);
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pleaseProceed.countDown();
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Arrays.fill(executors, null); // make executors unreachable
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boolean done = false;
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for (long timeout = 1L; !done && timeout <= 128L; timeout *= 2) {
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System.gc();
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done = true;
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for (WeakReference<Thread> ref : poolThreads) {
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Thread thread = ref.get();
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if (thread != null) {
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TimeUnit.SECONDS.timedJoin(thread, timeout);
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if (thread.isAlive())
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done = false;
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}
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}
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}
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if (!done)
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throw new AssertionError("pool threads did not terminate");
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}
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//--------------------- Infrastructure ---------------------------
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static volatile int passed = 0, failed = 0;
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static void pass() {passed++;}
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static void fail() {failed++; Thread.dumpStack();}
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static void fail(String msg) {System.out.println(msg); fail();}
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static void unexpected(Throwable t) {failed++; t.printStackTrace();}
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static void equal(Object x, Object y) {
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if (x == null ? y == null : x.equals(y)) pass();
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else fail(x + " not equal to " + y);}
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public static void main(String[] args) throws Throwable {
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try {realMain(args);} catch (Throwable t) {unexpected(t);}
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System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
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if (failed > 0) throw new AssertionError("Some tests failed");}
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}
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