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