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import java.util.concurrent.ScheduledFuture; |
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import java.util.concurrent.ScheduledThreadPoolExecutor; |
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import java.util.concurrent.ThreadFactory; |
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import java.util.concurrent.ThreadLocalRandom; |
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import java.util.concurrent.ThreadPoolExecutor; |
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import java.util.concurrent.atomic.AtomicBoolean; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import java.util.concurrent.atomic.AtomicLong; |
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import java.util.stream.Stream; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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* - setContinueExistingPeriodicTasksAfterShutdownPolicy |
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*/ |
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public void testShutdown_cancellation() throws Exception { |
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Boolean[] allBooleans = { null, Boolean.FALSE, Boolean.TRUE }; |
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for (Boolean policy : allBooleans) |
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< |
{ |
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< |
final int poolSize = 2; |
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final int poolSize = 6; |
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final ScheduledThreadPoolExecutor p |
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= new ScheduledThreadPoolExecutor(poolSize); |
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final boolean effectiveDelayedPolicy = (policy != Boolean.FALSE); |
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final boolean effectivePeriodicPolicy = (policy == Boolean.TRUE); |
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< |
final boolean effectiveRemovePolicy = (policy == Boolean.TRUE); |
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< |
if (policy != null) { |
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p.setExecuteExistingDelayedTasksAfterShutdownPolicy(policy); |
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p.setContinueExistingPeriodicTasksAfterShutdownPolicy(policy); |
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p.setRemoveOnCancelPolicy(policy); |
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< |
} |
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final BlockingQueue<Runnable> q = p.getQueue(); |
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final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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final boolean effectiveDelayedPolicy; |
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final boolean effectivePeriodicPolicy; |
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final boolean effectiveRemovePolicy; |
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|
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if (rnd.nextBoolean()) |
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> |
p.setExecuteExistingDelayedTasksAfterShutdownPolicy( |
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effectiveDelayedPolicy = rnd.nextBoolean()); |
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else |
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effectiveDelayedPolicy = true; |
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assertEquals(effectiveDelayedPolicy, |
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p.getExecuteExistingDelayedTasksAfterShutdownPolicy()); |
765 |
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|
766 |
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if (rnd.nextBoolean()) |
767 |
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p.setContinueExistingPeriodicTasksAfterShutdownPolicy( |
768 |
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effectivePeriodicPolicy = rnd.nextBoolean()); |
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else |
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effectivePeriodicPolicy = false; |
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assertEquals(effectivePeriodicPolicy, |
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p.getContinueExistingPeriodicTasksAfterShutdownPolicy()); |
773 |
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|
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if (rnd.nextBoolean()) |
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p.setRemoveOnCancelPolicy( |
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effectiveRemovePolicy = rnd.nextBoolean()); |
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else |
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effectiveRemovePolicy = false; |
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assertEquals(effectiveRemovePolicy, |
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p.getRemoveOnCancelPolicy()); |
781 |
< |
// Strategy: Wedge the pool with poolSize "blocker" threads |
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> |
|
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// System.err.println("effectiveDelayedPolicy="+effectiveDelayedPolicy); |
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// System.err.println("effectivePeriodicPolicy="+effectivePeriodicPolicy); |
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// System.err.println("effectiveRemovePolicy="+effectiveRemovePolicy); |
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|
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// Strategy: Wedge the pool with one wave of "blocker" tasks, |
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> |
// then add a second wave that waits in the queue. |
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final AtomicInteger ran = new AtomicInteger(0); |
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final CountDownLatch poolBlocked = new CountDownLatch(poolSize); |
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final CountDownLatch unblock = new CountDownLatch(1); |
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– |
final CountDownLatch periodicLatch1 = new CountDownLatch(2); |
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final CountDownLatch periodicLatch2 = new CountDownLatch(2); |
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Runnable task = new CheckedRunnable() { public void realRun() |
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throws InterruptedException { |
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poolBlocked.countDown(); |
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await(unblock); |
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ran.getAndIncrement(); |
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}}; |
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List<Future<?>> blockers = new ArrayList<>(); |
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List<Future<?>> periodics = new ArrayList<>(); |
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List<Future<?>> delayeds = new ArrayList<>(); |
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for (int i = 0; i < poolSize; i++) |
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blockers.add(p.submit(task)); |
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await(poolBlocked); |
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|
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periodics.add(p.scheduleAtFixedRate(countDowner(periodicLatch1), |
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1, 1, MILLISECONDS)); |
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periodics.add(p.scheduleWithFixedDelay(countDowner(periodicLatch2), |
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1, 1, MILLISECONDS)); |
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class Task extends CheckedRunnable { |
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public void realRun() throws InterruptedException { |
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ran.getAndIncrement(); |
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poolBlocked.countDown(); |
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await(unblock); |
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} |
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} |
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|
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class PeriodicTask extends Task { |
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PeriodicTask(int rounds) { this.rounds = rounds; } |
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int rounds; |
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public void realRun() throws InterruptedException { |
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if (--rounds == 0) super.realRun(); |
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} |
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} |
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|
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Runnable task = new Task(); |
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|
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List<Future<?>> immediates = new ArrayList<>(); |
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List<Future<?>> delayeds = new ArrayList<>(); |
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List<Future<?>> periodics = new ArrayList<>(); |
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|
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immediates.add(p.submit(task)); |
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delayeds.add(p.schedule(task, 1, MILLISECONDS)); |
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for (int rounds : new int[] { 1, 2 }) { |
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periodics.add(p.scheduleAtFixedRate( |
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new PeriodicTask(rounds), 1, 1, MILLISECONDS)); |
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periodics.add(p.scheduleWithFixedDelay( |
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new PeriodicTask(rounds), 1, 1, MILLISECONDS)); |
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} |
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|
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await(poolBlocked); |
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|
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assertEquals(poolSize, ran.get()); |
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assertTrue(q.isEmpty()); |
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|
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// Add second wave of tasks. |
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immediates.add(p.submit(task)); |
830 |
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long delay_ms = effectiveDelayedPolicy ? 1 : LONG_DELAY_MS; |
831 |
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delayeds.add(p.schedule(task, delay_ms, MILLISECONDS)); |
832 |
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for (int rounds : new int[] { 1, 2 }) { |
833 |
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periodics.add(p.scheduleAtFixedRate( |
834 |
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new PeriodicTask(rounds), 1, 1, MILLISECONDS)); |
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periodics.add(p.scheduleWithFixedDelay( |
836 |
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new PeriodicTask(rounds), 1, 1, MILLISECONDS)); |
837 |
+ |
} |
838 |
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|
839 |
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assertEquals(poolSize, q.size()); |
840 |
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assertEquals(poolSize, ran.get()); |
841 |
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|
842 |
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immediates.forEach( |
843 |
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f -> assertTrue(((ScheduledFuture)f).getDelay(NANOSECONDS) <= 0L)); |
844 |
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|
845 |
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Stream.of(immediates, delayeds, periodics).flatMap(c -> c.stream()) |
846 |
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.forEach(f -> assertFalse(f.isDone())); |
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|
792 |
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assertTrue(p.getQueue().containsAll(periodics)); |
793 |
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assertTrue(p.getQueue().containsAll(delayeds)); |
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try { p.shutdown(); } catch (SecurityException ok) { return; } |
849 |
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assertTrue(p.isShutdown()); |
850 |
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assertTrue(p.isTerminating()); |
851 |
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assertFalse(p.isTerminated()); |
852 |
< |
for (Future<?> periodic : periodics) { |
853 |
< |
assertTrue(effectivePeriodicPolicy ^ periodic.isCancelled()); |
854 |
< |
assertTrue(effectivePeriodicPolicy ^ periodic.isDone()); |
855 |
< |
} |
856 |
< |
for (Future<?> delayed : delayeds) { |
857 |
< |
assertTrue(effectiveDelayedPolicy ^ delayed.isCancelled()); |
858 |
< |
assertTrue(effectiveDelayedPolicy ^ delayed.isDone()); |
859 |
< |
} |
852 |
> |
|
853 |
> |
if (rnd.nextBoolean()) |
854 |
> |
assertThrows( |
855 |
> |
RejectedExecutionException.class, |
856 |
> |
() -> p.submit(task), |
857 |
> |
() -> p.schedule(task, 1, SECONDS), |
858 |
> |
() -> p.scheduleAtFixedRate( |
859 |
> |
new PeriodicTask(1), 1, 1, SECONDS), |
860 |
> |
() -> p.scheduleWithFixedDelay( |
861 |
> |
new PeriodicTask(2), 1, 1, SECONDS)); |
862 |
> |
|
863 |
> |
assertTrue(q.contains(immediates.get(1))); |
864 |
> |
assertTrue(!effectiveDelayedPolicy |
865 |
> |
^ q.contains(delayeds.get(1))); |
866 |
> |
assertTrue(!effectivePeriodicPolicy |
867 |
> |
^ q.containsAll(periodics.subList(4, 8))); |
868 |
> |
|
869 |
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immediates.forEach(f -> assertFalse(f.isDone())); |
870 |
> |
|
871 |
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assertFalse(delayeds.get(0).isDone()); |
872 |
> |
if (effectiveDelayedPolicy) |
873 |
> |
assertFalse(delayeds.get(1).isDone()); |
874 |
> |
else |
875 |
> |
assertTrue(delayeds.get(1).isCancelled()); |
876 |
> |
|
877 |
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if (testImplementationDetails) { |
878 |
< |
assertEquals(effectivePeriodicPolicy, |
879 |
< |
p.getQueue().containsAll(periodics)); |
880 |
< |
assertEquals(effectiveDelayedPolicy, |
881 |
< |
p.getQueue().containsAll(delayeds)); |
882 |
< |
} |
883 |
< |
// Release all pool threads |
884 |
< |
unblock.countDown(); |
885 |
< |
|
886 |
< |
for (Future<?> delayed : delayeds) { |
887 |
< |
if (effectiveDelayedPolicy) { |
816 |
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assertNull(delayed.get()); |
878 |
> |
if (effectivePeriodicPolicy) |
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> |
// TODO: ensure periodic tasks continue executing |
880 |
> |
periodics.forEach( |
881 |
> |
f -> { |
882 |
> |
assertFalse(f.isDone()); |
883 |
> |
assertTrue(f.cancel(false)); |
884 |
> |
}); |
885 |
> |
else { |
886 |
> |
periodics.subList(0, 4).forEach(f -> assertFalse(f.isDone())); |
887 |
> |
periodics.subList(4, 8).forEach(f -> assertTrue(f.isCancelled())); |
888 |
|
} |
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} |
890 |
< |
if (effectivePeriodicPolicy) { |
891 |
< |
await(periodicLatch1); |
892 |
< |
await(periodicLatch2); |
822 |
< |
for (Future<?> periodic : periodics) { |
823 |
< |
assertTrue(periodic.cancel(false)); |
824 |
< |
assertTrue(periodic.isCancelled()); |
825 |
< |
assertTrue(periodic.isDone()); |
826 |
< |
} |
827 |
< |
} |
828 |
< |
for (Future<?> blocker : blockers) assertNull(blocker.get()); |
890 |
> |
|
891 |
> |
unblock.countDown(); // Release all pool threads |
892 |
> |
|
893 |
|
assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS)); |
894 |
+ |
assertFalse(p.isTerminating()); |
895 |
|
assertTrue(p.isTerminated()); |
896 |
< |
assertEquals(2 + (effectiveDelayedPolicy ? 1 : 0), ran.get()); |
897 |
< |
}} |
896 |
> |
|
897 |
> |
assertTrue(q.isEmpty()); |
898 |
> |
|
899 |
> |
for (Future<?> f : immediates) assertNull(f.get()); |
900 |
> |
|
901 |
> |
assertNull(delayeds.get(0).get()); |
902 |
> |
if (effectiveDelayedPolicy) |
903 |
> |
assertNull(delayeds.get(1).get()); |
904 |
> |
else |
905 |
> |
assertTrue(delayeds.get(1).isCancelled()); |
906 |
> |
|
907 |
> |
periodics.forEach(f -> assertTrue(f.isDone())); |
908 |
> |
periodics.forEach(f -> assertTrue(f.isCancelled())); |
909 |
> |
|
910 |
> |
assertEquals(poolSize + 1 + (effectiveDelayedPolicy ? 1 : 0), ran.get()); |
911 |
> |
} |
912 |
|
|
913 |
|
/** |
914 |
|
* completed submit of callable returns result |