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