| /* |
| * Copyright (c) 2006, 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 |
| * @author Martin Buchholz |
| */ |
| |
| import java.io.*; |
| import java.util.*; |
| import java.util.concurrent.*; |
| import static java.util.concurrent.Executors.*; |
| import java.util.concurrent.Phaser; |
| |
| public class AutoShutdown { |
| private static void waitForFinalizersToRun() { |
| for (int i = 0; i < 2; i++) |
| tryWaitForFinalizersToRun(); |
| } |
| |
| private static void tryWaitForFinalizersToRun() { |
| System.gc(); |
| final CountDownLatch fin = new CountDownLatch(1); |
| new Object() { protected void finalize() { fin.countDown(); }}; |
| System.gc(); |
| try { fin.await(); } |
| catch (InterruptedException ie) { throw new Error(ie); } |
| } |
| |
| private static void realMain(String[] args) throws Throwable { |
| final Phaser phaser = new Phaser(3); |
| Runnable trivialRunnable = new Runnable() { |
| public void run() { |
| phaser.arriveAndAwaitAdvance(); |
| } |
| }; |
| int count0 = Thread.activeCount(); |
| Executor e1 = newSingleThreadExecutor(); |
| Executor e2 = newSingleThreadExecutor(defaultThreadFactory()); |
| e1.execute(trivialRunnable); |
| e2.execute(trivialRunnable); |
| phaser.arriveAndAwaitAdvance(); |
| equal(Thread.activeCount(), count0 + 2); |
| e1 = e2 = null; |
| for (int i = 0; i < 10 && Thread.activeCount() > count0; i++) |
| tryWaitForFinalizersToRun(); |
| equal(Thread.activeCount(), count0); |
| } |
| |
| //--------------------- 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");} |
| } |