118 lines
4.6 KiB
Java
118 lines
4.6 KiB
Java
/*
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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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* @test
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* @bug 6602600
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* @run main/othervm -Xmx64m BasicCancelTest
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* @summary Check effectiveness of RemoveOnCancelPolicy
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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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* 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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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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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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void test(String[] args) throws Throwable {
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final ScheduledThreadPoolExecutor pool =
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new ScheduledThreadPoolExecutor(1);
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// Needed to avoid OOME
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pool.setRemoveOnCancelPolicy(true);
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final long moreThanYouCanChew = Runtime.getRuntime().maxMemory() / 32;
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System.out.printf("moreThanYouCanChew=%d%n", moreThanYouCanChew);
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Runnable noopTask = new Runnable() { public void run() {}};
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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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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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//--------------------- 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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}
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