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/* |
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* Copyright (c) 2008, 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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/* |
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* @test |
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* @bug 6602600 |
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* @run main/othervm -Xmx8m BasicCancelTest |
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* @summary Check effectiveness of RemoveOnCancelPolicy |
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*/ |
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|
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import java.util.Random; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.RejectedExecutionException; |
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import java.util.concurrent.ScheduledThreadPoolExecutor; |
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import java.util.concurrent.ThreadPoolExecutor; |
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import java.util.concurrent.TimeUnit; |
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|
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/** |
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* Simple timer cancellation test. Submits tasks to a scheduled executor |
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* service and immediately cancels them. |
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*/ |
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public class BasicCancelTest { |
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|
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void checkShutdown(final ExecutorService es) { |
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final Runnable nop = new Runnable() {public void run() {}}; |
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try { |
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if (new Random().nextBoolean()) { |
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check(es.isShutdown()); |
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if (es instanceof ThreadPoolExecutor) |
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check(((ThreadPoolExecutor) es).isTerminating() |
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|| es.isTerminated()); |
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THROWS(RejectedExecutionException.class, |
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new F(){void f(){es.execute(nop);}}); |
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} |
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} catch (Throwable t) { unexpected(t); } |
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} |
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|
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void checkTerminated(final ThreadPoolExecutor tpe) { |
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try { |
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checkShutdown(tpe); |
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check(tpe.getQueue().isEmpty()); |
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check(tpe.isTerminated()); |
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check(! tpe.isTerminating()); |
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equal(tpe.getActiveCount(), 0); |
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equal(tpe.getPoolSize(), 0); |
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equal(tpe.getTaskCount(), tpe.getCompletedTaskCount()); |
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check(tpe.awaitTermination(0L, TimeUnit.SECONDS)); |
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} catch (Throwable t) { unexpected(t); } |
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} |
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|
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void test(String[] args) throws Throwable { |
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|
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final ScheduledThreadPoolExecutor pool = |
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new ScheduledThreadPoolExecutor(1); |
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|
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// Needed to avoid OOME |
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pool.setRemoveOnCancelPolicy(true); |
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|
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final long moreThanYouCanChew = Runtime.getRuntime().freeMemory() / 4; |
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System.out.printf("moreThanYouCanChew=%d%n", moreThanYouCanChew); |
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|
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Runnable noopTask = new Runnable() { public void run() {}}; |
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|
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for (long i = 0; i < moreThanYouCanChew; i++) |
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pool.schedule(noopTask, 10, TimeUnit.MINUTES).cancel(true); |
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|
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pool.shutdown(); |
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check(pool.awaitTermination(1L, TimeUnit.DAYS)); |
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checkTerminated(pool); |
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equal(pool.getTaskCount(), 0L); |
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equal(pool.getCompletedTaskCount(), 0L); |
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} |
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|
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//--------------------- Infrastructure --------------------------- |
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volatile int passed = 0, failed = 0; |
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void pass() {passed++;} |
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void fail() {failed++; Thread.dumpStack();} |
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void fail(String msg) {System.err.println(msg); fail();} |
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void unexpected(Throwable t) {failed++; t.printStackTrace();} |
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void check(boolean cond) {if (cond) pass(); else fail();} |
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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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new BasicCancelTest().instanceMain(args);} |
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void instanceMain(String[] args) throws Throwable { |
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try {test(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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abstract class F {abstract void f() throws Throwable;} |
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void THROWS(Class<? extends Throwable> k, F... fs) { |
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for (F f : fs) |
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try {f.f(); fail("Expected " + k.getName() + " not thrown");} |
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catch (Throwable t) { |
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if (k.isAssignableFrom(t.getClass())) pass(); |
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else unexpected(t);}} |
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} |
