| /* |
| * 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 6730507 |
| * @summary java.util.Timer schedule delay Long.MAX_VALUE causes task to execute multiple times |
| * @author Chris Hegarty |
| * @author Martin Buchholz |
| * @key randomness |
| */ |
| |
| import java.util.Date; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| import java.util.concurrent.*; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| public class DelayOverflow |
| { |
| void scheduleNow(Timer timer, TimerTask task, int how) { |
| switch (how) { |
| case 0 : |
| timer.schedule(task, new Date(), Long.MAX_VALUE); |
| break; |
| case 1: |
| timer.schedule(task, 0L, Long.MAX_VALUE); |
| break; |
| case 2: |
| timer.scheduleAtFixedRate(task, new Date(), Long.MAX_VALUE); |
| break; |
| case 3: |
| timer.scheduleAtFixedRate(task, 0L, Long.MAX_VALUE); |
| break; |
| default: |
| fail(String.valueOf(how)); |
| } |
| } |
| |
| void sleep(long millis) { |
| try { Thread.sleep(millis); } |
| catch (Throwable t) { unexpected(t); } |
| } |
| |
| /** Checks that scheduledExecutionTime returns a "recent" time. */ |
| void checkScheduledExecutionTime(TimerTask task) { |
| long t = System.currentTimeMillis() |
| - task.scheduledExecutionTime(); |
| check(t >= 0 && t < 1000 * 600); |
| } |
| |
| void test(String[] args) throws Throwable { |
| for (int how=0; how<4; how++) { |
| final CountDownLatch done = new CountDownLatch(1); |
| final AtomicInteger count = new AtomicInteger(0); |
| final Timer timer = new Timer(); |
| final TimerTask task = new TimerTask() { |
| @Override |
| public void run() { |
| checkScheduledExecutionTime(this); |
| count.incrementAndGet(); |
| done.countDown(); |
| }}; |
| |
| scheduleNow(timer, task, how); |
| done.await(); |
| equal(count.get(), 1); |
| checkScheduledExecutionTime(task); |
| if (new java.util.Random().nextBoolean()) |
| sleep(10); |
| check(task.cancel()); |
| timer.cancel(); |
| checkScheduledExecutionTime(task); |
| } |
| } |
| |
| //--------------------- 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 { |
| Class<?> k = new Object(){}.getClass().getEnclosingClass(); |
| try {k.getMethod("instanceMain",String[].class) |
| .invoke( k.newInstance(), (Object) args);} |
| catch (Throwable e) {throw e.getCause();}} |
| public 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");} |
| } |