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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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|
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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|
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import java.security.PrivilegedAction; |
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import java.security.PrivilegedExceptionAction; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.List; |
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import java.util.concurrent.Callable; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.ExecutionException; |
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import java.util.concurrent.Executors; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.ForkJoinPool; |
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import java.util.concurrent.ForkJoinTask; |
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import java.util.concurrent.ForkJoinWorkerThread; |
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import java.util.concurrent.Future; |
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import java.util.concurrent.RecursiveTask; |
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import java.util.concurrent.RejectedExecutionException; |
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import java.util.concurrent.atomic.AtomicBoolean; |
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import java.util.concurrent.locks.ReentrantLock; |
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|
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import junit.framework.AssertionFailedError; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class ForkJoinPoolTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(ForkJoinPoolTest.class); |
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} |
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|
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/* |
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* Testing coverage notes: |
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* |
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* 1. shutdown and related methods are tested via super.joinPool. |
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* |
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* 2. newTaskFor and adapters are tested in submit/invoke tests |
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* |
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* 3. We cannot portably test monitoring methods such as |
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* getStealCount() since they rely ultimately on random task |
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* stealing that may cause tasks not to be stolen/propagated |
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* across threads, especially on uniprocessors. |
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* |
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* 4. There are no independently testable ForkJoinWorkerThread |
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* methods, but they are covered here and in task tests. |
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*/ |
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|
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// Some classes to test extension and factory methods |
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|
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static class MyHandler implements Thread.UncaughtExceptionHandler { |
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volatile int catches = 0; |
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public void uncaughtException(Thread t, Throwable e) { |
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++catches; |
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} |
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} |
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|
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static class MyError extends Error {} |
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|
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// to test handlers |
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static class FailingFJWSubclass extends ForkJoinWorkerThread { |
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public FailingFJWSubclass(ForkJoinPool p) { super(p) ; } |
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protected void onStart() { super.onStart(); throw new MyError(); } |
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} |
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|
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static class FailingThreadFactory |
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implements ForkJoinPool.ForkJoinWorkerThreadFactory { |
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volatile int calls = 0; |
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public ForkJoinWorkerThread newThread(ForkJoinPool p) { |
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if (++calls > 1) return null; |
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return new FailingFJWSubclass(p); |
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} |
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} |
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|
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static class SubFJP extends ForkJoinPool { // to expose protected |
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SubFJP() { super(1); } |
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public int drainTasksTo(Collection<? super ForkJoinTask<?>> c) { |
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return super.drainTasksTo(c); |
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} |
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public ForkJoinTask<?> pollSubmission() { |
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return super.pollSubmission(); |
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} |
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} |
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|
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static class ManagedLocker implements ForkJoinPool.ManagedBlocker { |
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final ReentrantLock lock; |
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boolean hasLock = false; |
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ManagedLocker(ReentrantLock lock) { this.lock = lock; } |
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public boolean block() { |
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if (!hasLock) |
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lock.lock(); |
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return true; |
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} |
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public boolean isReleasable() { |
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return hasLock || (hasLock = lock.tryLock()); |
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} |
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} |
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|
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// A simple recursive task for testing |
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static final class FibTask extends RecursiveTask<Integer> { |
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final int number; |
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FibTask(int n) { number = n; } |
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protected Integer compute() { |
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int n = number; |
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if (n <= 1) |
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return n; |
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FibTask f1 = new FibTask(n - 1); |
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f1.fork(); |
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return (new FibTask(n - 2)).compute() + f1.join(); |
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} |
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} |
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|
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// A failing task for testing |
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static final class FailingTask extends ForkJoinTask<Void> { |
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public final Void getRawResult() { return null; } |
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protected final void setRawResult(Void mustBeNull) { } |
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protected final boolean exec() { throw new Error(); } |
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FailingTask() {} |
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} |
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|
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// Fib needlessly using locking to test ManagedBlockers |
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static final class LockingFibTask extends RecursiveTask<Integer> { |
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final int number; |
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final ManagedLocker locker; |
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final ReentrantLock lock; |
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LockingFibTask(int n, ManagedLocker locker, ReentrantLock lock) { |
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number = n; |
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this.locker = locker; |
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this.lock = lock; |
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} |
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protected Integer compute() { |
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int n; |
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LockingFibTask f1 = null; |
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LockingFibTask f2 = null; |
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locker.block(); |
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n = number; |
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if (n > 1) { |
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f1 = new LockingFibTask(n - 1, locker, lock); |
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f2 = new LockingFibTask(n - 2, locker, lock); |
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} |
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lock.unlock(); |
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if (n <= 1) |
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return n; |
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else { |
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f1.fork(); |
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return f2.compute() + f1.join(); |
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} |
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} |
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} |
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|
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/** |
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* Successfully constructed pool reports default factory, |
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* parallelism and async mode policies, no active threads or |
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* tasks, and quiescent running state. |
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*/ |
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public void testDefaultInitialState() { |
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ForkJoinPool p = new ForkJoinPool(1); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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assertSame(ForkJoinPool.defaultForkJoinWorkerThreadFactory, |
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p.getFactory()); |
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assertFalse(p.getAsyncMode()); |
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assertEquals(0, p.getActiveThreadCount()); |
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assertEquals(0, p.getStealCount()); |
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assertEquals(0, p.getQueuedTaskCount()); |
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assertEquals(0, p.getQueuedSubmissionCount()); |
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assertFalse(p.hasQueuedSubmissions()); |
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assertFalse(p.isShutdown()); |
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assertFalse(p.isTerminating()); |
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assertFalse(p.isTerminated()); |
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} |
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} |
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|
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/** |
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* Constructor throws if size argument is less than zero |
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*/ |
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public void testConstructor1() { |
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try { |
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new ForkJoinPool(-1); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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* Constructor throws if factory argument is null |
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*/ |
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public void testConstructor2() { |
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try { |
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new ForkJoinPool(1, null, null, false); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* getParallelism returns size set in constructor |
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*/ |
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public void testGetParallelism() { |
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ForkJoinPool p = new ForkJoinPool(1); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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assertEquals(1, p.getParallelism()); |
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} |
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} |
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|
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/** |
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* getPoolSize returns number of started workers. |
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*/ |
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public void testGetPoolSize() { |
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ForkJoinPool p = new ForkJoinPool(1); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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assertEquals(0, p.getActiveThreadCount()); |
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Future<String> future = p.submit(new StringTask()); |
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assertEquals(1, p.getPoolSize()); |
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} |
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} |
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|
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/** |
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* awaitTermination on a non-shutdown pool times out |
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*/ |
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public void testAwaitTermination_timesOut() throws InterruptedException { |
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ForkJoinPool p = new ForkJoinPool(1); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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assertFalse(p.isTerminated()); |
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assertFalse(p.awaitTermination(Long.MIN_VALUE, NANOSECONDS)); |
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assertFalse(p.awaitTermination(Long.MIN_VALUE, MILLISECONDS)); |
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assertFalse(p.awaitTermination(-1L, NANOSECONDS)); |
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assertFalse(p.awaitTermination(-1L, MILLISECONDS)); |
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assertFalse(p.awaitTermination(0L, NANOSECONDS)); |
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assertFalse(p.awaitTermination(0L, MILLISECONDS)); |
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long timeoutNanos = 999999L; |
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long startTime = System.nanoTime(); |
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assertFalse(p.awaitTermination(timeoutNanos, NANOSECONDS)); |
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assertTrue(System.nanoTime() - startTime >= timeoutNanos); |
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assertFalse(p.isTerminated()); |
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startTime = System.nanoTime(); |
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long timeoutMillis = timeoutMillis(); |
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assertFalse(p.awaitTermination(timeoutMillis, MILLISECONDS)); |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
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assertFalse(p.isTerminated()); |
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p.shutdown(); |
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assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS)); |
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assertTrue(p.isTerminated()); |
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} |
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} |
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|
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/** |
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* setUncaughtExceptionHandler changes handler for uncaught exceptions. |
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* |
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* Additionally tests: Overriding ForkJoinWorkerThread.onStart |
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* performs its defined action |
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*/ |
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public void testSetUncaughtExceptionHandler() throws InterruptedException { |
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final CountDownLatch uehInvoked = new CountDownLatch(1); |
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final Thread.UncaughtExceptionHandler ueh = |
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new Thread.UncaughtExceptionHandler() { |
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public void uncaughtException(Thread t, Throwable e) { |
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threadAssertTrue(e instanceof MyError); |
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threadAssertTrue(t instanceof FailingFJWSubclass); |
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uehInvoked.countDown(); |
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}}; |
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ForkJoinPool p = new ForkJoinPool(1, new FailingThreadFactory(), |
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ueh, false); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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assertSame(ueh, p.getUncaughtExceptionHandler()); |
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try { |
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p.execute(new FibTask(8)); |
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await(uehInvoked); |
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} finally { |
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p.shutdownNow(); // failure might have prevented processing task |
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} |
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} |
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} |
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|
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/** |
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* After invoking a single task, isQuiescent eventually becomes |
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* true, at which time queues are empty, threads are not active, |
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* the task has completed successfully, and construction |
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* parameters continue to hold |
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*/ |
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public void testIsQuiescent() throws Exception { |
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ForkJoinPool p = new ForkJoinPool(2); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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assertTrue(p.isQuiescent()); |
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long startTime = System.nanoTime(); |
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FibTask f = new FibTask(20); |
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p.invoke(f); |
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assertSame(ForkJoinPool.defaultForkJoinWorkerThreadFactory, |
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p.getFactory()); |
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while (! p.isQuiescent()) { |
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if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
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throw new AssertionFailedError("timed out"); |
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assertFalse(p.getAsyncMode()); |
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assertFalse(p.isShutdown()); |
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assertFalse(p.isTerminating()); |
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assertFalse(p.isTerminated()); |
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Thread.yield(); |
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} |
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|
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assertTrue(p.isQuiescent()); |
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assertFalse(p.getAsyncMode()); |
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assertEquals(0, p.getActiveThreadCount()); |
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assertEquals(0, p.getQueuedTaskCount()); |
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assertEquals(0, p.getQueuedSubmissionCount()); |
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assertFalse(p.hasQueuedSubmissions()); |
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assertFalse(p.isShutdown()); |
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assertFalse(p.isTerminating()); |
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assertFalse(p.isTerminated()); |
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assertTrue(f.isDone()); |
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assertEquals(6765, (int) f.get()); |
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} |
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} |
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|
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/** |
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* Completed submit(ForkJoinTask) returns result |
322 |
*/ |
323 |
public void testSubmitForkJoinTask() throws Throwable { |
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ForkJoinPool p = new ForkJoinPool(1); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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ForkJoinTask<Integer> f = p.submit(new FibTask(8)); |
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assertEquals(21, (int) f.get()); |
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} |
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} |
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|
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/** |
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* A task submitted after shutdown is rejected |
333 |
*/ |
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public void testSubmitAfterShutdown() { |
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ForkJoinPool p = new ForkJoinPool(1); |
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try (PoolCleaner cleaner = cleaner(p)) { |
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p.shutdown(); |
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assertTrue(p.isShutdown()); |
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try { |
340 |
ForkJoinTask<Integer> f = p.submit(new FibTask(8)); |
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shouldThrow(); |
342 |
} catch (RejectedExecutionException success) {} |
343 |
} |
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} |
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|
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/** |
347 |
* Pool maintains parallelism when using ManagedBlocker |
348 |
*/ |
349 |
public void testBlockingForkJoinTask() throws Throwable { |
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ForkJoinPool p = new ForkJoinPool(4); |
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try { |
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ReentrantLock lock = new ReentrantLock(); |
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ManagedLocker locker = new ManagedLocker(lock); |
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ForkJoinTask<Integer> f = new LockingFibTask(20, locker, lock); |
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p.execute(f); |
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assertEquals(6765, (int) f.get()); |
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} finally { |
358 |
p.shutdownNow(); // don't wait out shutdown |
359 |
} |
360 |
} |
361 |
|
362 |
/** |
363 |
* pollSubmission returns unexecuted submitted task, if present |
364 |
*/ |
365 |
public void testPollSubmission() { |
366 |
final CountDownLatch done = new CountDownLatch(1); |
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SubFJP p = new SubFJP(); |
368 |
try (PoolCleaner cleaner = cleaner(p)) { |
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ForkJoinTask a = p.submit(awaiter(done)); |
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ForkJoinTask b = p.submit(awaiter(done)); |
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ForkJoinTask c = p.submit(awaiter(done)); |
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ForkJoinTask r = p.pollSubmission(); |
373 |
assertTrue(r == a || r == b || r == c); |
374 |
assertFalse(r.isDone()); |
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done.countDown(); |
376 |
} |
377 |
} |
378 |
|
379 |
/** |
380 |
* drainTasksTo transfers unexecuted submitted tasks, if present |
381 |
*/ |
382 |
public void testDrainTasksTo() { |
383 |
final CountDownLatch done = new CountDownLatch(1); |
384 |
SubFJP p = new SubFJP(); |
385 |
try (PoolCleaner cleaner = cleaner(p)) { |
386 |
ForkJoinTask a = p.submit(awaiter(done)); |
387 |
ForkJoinTask b = p.submit(awaiter(done)); |
388 |
ForkJoinTask c = p.submit(awaiter(done)); |
389 |
ArrayList<ForkJoinTask> al = new ArrayList(); |
390 |
p.drainTasksTo(al); |
391 |
assertTrue(al.size() > 0); |
392 |
for (ForkJoinTask r : al) { |
393 |
assertTrue(r == a || r == b || r == c); |
394 |
assertFalse(r.isDone()); |
395 |
} |
396 |
done.countDown(); |
397 |
} |
398 |
} |
399 |
|
400 |
// FJ Versions of AbstractExecutorService tests |
401 |
|
402 |
/** |
403 |
* execute(runnable) runs it to completion |
404 |
*/ |
405 |
public void testExecuteRunnable() throws Throwable { |
406 |
ExecutorService e = new ForkJoinPool(1); |
407 |
try (PoolCleaner cleaner = cleaner(e)) { |
408 |
final AtomicBoolean done = new AtomicBoolean(false); |
409 |
Future<?> future = e.submit(new CheckedRunnable() { |
410 |
public void realRun() { |
411 |
done.set(true); |
412 |
}}); |
413 |
assertNull(future.get()); |
414 |
assertNull(future.get(0, MILLISECONDS)); |
415 |
assertTrue(done.get()); |
416 |
assertTrue(future.isDone()); |
417 |
assertFalse(future.isCancelled()); |
418 |
} |
419 |
} |
420 |
|
421 |
/** |
422 |
* Completed submit(callable) returns result |
423 |
*/ |
424 |
public void testSubmitCallable() throws Throwable { |
425 |
ExecutorService e = new ForkJoinPool(1); |
426 |
try (PoolCleaner cleaner = cleaner(e)) { |
427 |
Future<String> future = e.submit(new StringTask()); |
428 |
assertSame(TEST_STRING, future.get()); |
429 |
assertTrue(future.isDone()); |
430 |
assertFalse(future.isCancelled()); |
431 |
} |
432 |
} |
433 |
|
434 |
/** |
435 |
* Completed submit(runnable) returns successfully |
436 |
*/ |
437 |
public void testSubmitRunnable() throws Throwable { |
438 |
ExecutorService e = new ForkJoinPool(1); |
439 |
try (PoolCleaner cleaner = cleaner(e)) { |
440 |
Future<?> future = e.submit(new NoOpRunnable()); |
441 |
assertNull(future.get()); |
442 |
assertTrue(future.isDone()); |
443 |
assertFalse(future.isCancelled()); |
444 |
} |
445 |
} |
446 |
|
447 |
/** |
448 |
* Completed submit(runnable, result) returns result |
449 |
*/ |
450 |
public void testSubmitRunnable2() throws Throwable { |
451 |
ExecutorService e = new ForkJoinPool(1); |
452 |
try (PoolCleaner cleaner = cleaner(e)) { |
453 |
Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING); |
454 |
assertSame(TEST_STRING, future.get()); |
455 |
assertTrue(future.isDone()); |
456 |
assertFalse(future.isCancelled()); |
457 |
} |
458 |
} |
459 |
|
460 |
/** |
461 |
* A submitted privileged action runs to completion |
462 |
*/ |
463 |
public void testSubmitPrivilegedAction() throws Exception { |
464 |
final Callable callable = Executors.callable(new PrivilegedAction() { |
465 |
public Object run() { return TEST_STRING; }}); |
466 |
Runnable r = new CheckedRunnable() { |
467 |
public void realRun() throws Exception { |
468 |
ExecutorService e = new ForkJoinPool(1); |
469 |
try (PoolCleaner cleaner = cleaner(e)) { |
470 |
Future future = e.submit(callable); |
471 |
assertSame(TEST_STRING, future.get()); |
472 |
} |
473 |
}}; |
474 |
|
475 |
runWithPermissions(r, new RuntimePermission("modifyThread")); |
476 |
} |
477 |
|
478 |
/** |
479 |
* A submitted privileged exception action runs to completion |
480 |
*/ |
481 |
public void testSubmitPrivilegedExceptionAction() throws Exception { |
482 |
final Callable callable = |
483 |
Executors.callable(new PrivilegedExceptionAction() { |
484 |
public Object run() { return TEST_STRING; }}); |
485 |
Runnable r = new CheckedRunnable() { |
486 |
public void realRun() throws Exception { |
487 |
ExecutorService e = new ForkJoinPool(1); |
488 |
try (PoolCleaner cleaner = cleaner(e)) { |
489 |
Future future = e.submit(callable); |
490 |
assertSame(TEST_STRING, future.get()); |
491 |
} |
492 |
}}; |
493 |
|
494 |
runWithPermissions(r, new RuntimePermission("modifyThread")); |
495 |
} |
496 |
|
497 |
/** |
498 |
* A submitted failed privileged exception action reports exception |
499 |
*/ |
500 |
public void testSubmitFailedPrivilegedExceptionAction() throws Exception { |
501 |
final Callable callable = |
502 |
Executors.callable(new PrivilegedExceptionAction() { |
503 |
public Object run() { throw new IndexOutOfBoundsException(); }}); |
504 |
Runnable r = new CheckedRunnable() { |
505 |
public void realRun() throws Exception { |
506 |
ExecutorService e = new ForkJoinPool(1); |
507 |
try (PoolCleaner cleaner = cleaner(e)) { |
508 |
Future future = e.submit(callable); |
509 |
try { |
510 |
future.get(); |
511 |
shouldThrow(); |
512 |
} catch (ExecutionException success) { |
513 |
assertTrue(success.getCause() instanceof IndexOutOfBoundsException); |
514 |
} |
515 |
} |
516 |
}}; |
517 |
|
518 |
runWithPermissions(r, new RuntimePermission("modifyThread")); |
519 |
} |
520 |
|
521 |
/** |
522 |
* execute(null runnable) throws NullPointerException |
523 |
*/ |
524 |
public void testExecuteNullRunnable() { |
525 |
ExecutorService e = new ForkJoinPool(1); |
526 |
try (PoolCleaner cleaner = cleaner(e)) { |
527 |
try { |
528 |
Future<?> future = e.submit((Runnable) null); |
529 |
shouldThrow(); |
530 |
} catch (NullPointerException success) {} |
531 |
} |
532 |
} |
533 |
|
534 |
/** |
535 |
* submit(null callable) throws NullPointerException |
536 |
*/ |
537 |
public void testSubmitNullCallable() { |
538 |
ExecutorService e = new ForkJoinPool(1); |
539 |
try (PoolCleaner cleaner = cleaner(e)) { |
540 |
try { |
541 |
Future<String> future = e.submit((Callable) null); |
542 |
shouldThrow(); |
543 |
} catch (NullPointerException success) {} |
544 |
} |
545 |
} |
546 |
|
547 |
/** |
548 |
* submit(callable).get() throws InterruptedException if interrupted |
549 |
*/ |
550 |
public void testInterruptedSubmit() throws InterruptedException { |
551 |
final CountDownLatch submitted = new CountDownLatch(1); |
552 |
final CountDownLatch quittingTime = new CountDownLatch(1); |
553 |
final Callable<Void> awaiter = new CheckedCallable<Void>() { |
554 |
public Void realCall() throws InterruptedException { |
555 |
assertTrue(quittingTime.await(2*LONG_DELAY_MS, MILLISECONDS)); |
556 |
return null; |
557 |
}}; |
558 |
final ExecutorService p = new ForkJoinPool(1); |
559 |
try (PoolCleaner cleaner = cleaner(p, quittingTime)) { |
560 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
561 |
public void realRun() throws Exception { |
562 |
Future<Void> future = p.submit(awaiter); |
563 |
submitted.countDown(); |
564 |
future.get(); |
565 |
}}); |
566 |
t.start(); |
567 |
await(submitted); |
568 |
t.interrupt(); |
569 |
awaitTermination(t); |
570 |
} |
571 |
} |
572 |
|
573 |
/** |
574 |
* get of submit(callable) throws ExecutionException if callable |
575 |
* throws exception |
576 |
*/ |
577 |
public void testSubmitEE() throws Throwable { |
578 |
ForkJoinPool p = new ForkJoinPool(1); |
579 |
try (PoolCleaner cleaner = cleaner(p)) { |
580 |
try { |
581 |
p.submit(new Callable() { |
582 |
public Object call() { throw new ArithmeticException(); }}) |
583 |
.get(); |
584 |
shouldThrow(); |
585 |
} catch (ExecutionException success) { |
586 |
assertTrue(success.getCause() instanceof ArithmeticException); |
587 |
} |
588 |
} |
589 |
} |
590 |
|
591 |
/** |
592 |
* invokeAny(null) throws NullPointerException |
593 |
*/ |
594 |
public void testInvokeAny1() throws Throwable { |
595 |
ExecutorService e = new ForkJoinPool(1); |
596 |
try (PoolCleaner cleaner = cleaner(e)) { |
597 |
try { |
598 |
e.invokeAny(null); |
599 |
shouldThrow(); |
600 |
} catch (NullPointerException success) {} |
601 |
} |
602 |
} |
603 |
|
604 |
/** |
605 |
* invokeAny(empty collection) throws IllegalArgumentException |
606 |
*/ |
607 |
public void testInvokeAny2() throws Throwable { |
608 |
ExecutorService e = new ForkJoinPool(1); |
609 |
try (PoolCleaner cleaner = cleaner(e)) { |
610 |
try { |
611 |
e.invokeAny(new ArrayList<Callable<String>>()); |
612 |
shouldThrow(); |
613 |
} catch (IllegalArgumentException success) {} |
614 |
} |
615 |
} |
616 |
|
617 |
/** |
618 |
* invokeAny(c) throws NullPointerException if c has a single null element |
619 |
*/ |
620 |
public void testInvokeAny3() throws Throwable { |
621 |
ExecutorService e = new ForkJoinPool(1); |
622 |
try (PoolCleaner cleaner = cleaner(e)) { |
623 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
624 |
l.add(null); |
625 |
try { |
626 |
e.invokeAny(l); |
627 |
shouldThrow(); |
628 |
} catch (NullPointerException success) {} |
629 |
} |
630 |
} |
631 |
|
632 |
/** |
633 |
* invokeAny(c) throws NullPointerException if c has null elements |
634 |
*/ |
635 |
public void testInvokeAny4() throws Throwable { |
636 |
CountDownLatch latch = new CountDownLatch(1); |
637 |
ExecutorService e = new ForkJoinPool(1); |
638 |
try (PoolCleaner cleaner = cleaner(e)) { |
639 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
640 |
l.add(latchAwaitingStringTask(latch)); |
641 |
l.add(null); |
642 |
try { |
643 |
e.invokeAny(l); |
644 |
shouldThrow(); |
645 |
} catch (NullPointerException success) {} |
646 |
latch.countDown(); |
647 |
} |
648 |
} |
649 |
|
650 |
/** |
651 |
* invokeAny(c) throws ExecutionException if no task in c completes |
652 |
*/ |
653 |
public void testInvokeAny5() throws Throwable { |
654 |
ExecutorService e = new ForkJoinPool(1); |
655 |
try (PoolCleaner cleaner = cleaner(e)) { |
656 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
657 |
l.add(new NPETask()); |
658 |
try { |
659 |
e.invokeAny(l); |
660 |
shouldThrow(); |
661 |
} catch (ExecutionException success) { |
662 |
assertTrue(success.getCause() instanceof NullPointerException); |
663 |
} |
664 |
} |
665 |
} |
666 |
|
667 |
/** |
668 |
* invokeAny(c) returns result of some task in c if at least one completes |
669 |
*/ |
670 |
public void testInvokeAny6() throws Throwable { |
671 |
ExecutorService e = new ForkJoinPool(1); |
672 |
try (PoolCleaner cleaner = cleaner(e)) { |
673 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
674 |
l.add(new StringTask()); |
675 |
l.add(new StringTask()); |
676 |
String result = e.invokeAny(l); |
677 |
assertSame(TEST_STRING, result); |
678 |
} |
679 |
} |
680 |
|
681 |
/** |
682 |
* invokeAll(null) throws NullPointerException |
683 |
*/ |
684 |
public void testInvokeAll1() throws Throwable { |
685 |
ExecutorService e = new ForkJoinPool(1); |
686 |
try (PoolCleaner cleaner = cleaner(e)) { |
687 |
try { |
688 |
e.invokeAll(null); |
689 |
shouldThrow(); |
690 |
} catch (NullPointerException success) {} |
691 |
} |
692 |
} |
693 |
|
694 |
/** |
695 |
* invokeAll(empty collection) returns empty collection |
696 |
*/ |
697 |
public void testInvokeAll2() throws InterruptedException { |
698 |
ExecutorService e = new ForkJoinPool(1); |
699 |
try (PoolCleaner cleaner = cleaner(e)) { |
700 |
List<Future<String>> r |
701 |
= e.invokeAll(new ArrayList<Callable<String>>()); |
702 |
assertTrue(r.isEmpty()); |
703 |
} |
704 |
} |
705 |
|
706 |
/** |
707 |
* invokeAll(c) throws NullPointerException if c has null elements |
708 |
*/ |
709 |
public void testInvokeAll3() throws InterruptedException { |
710 |
ExecutorService e = new ForkJoinPool(1); |
711 |
try (PoolCleaner cleaner = cleaner(e)) { |
712 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
713 |
l.add(new StringTask()); |
714 |
l.add(null); |
715 |
try { |
716 |
e.invokeAll(l); |
717 |
shouldThrow(); |
718 |
} catch (NullPointerException success) {} |
719 |
} |
720 |
} |
721 |
|
722 |
/** |
723 |
* get of returned element of invokeAll(c) throws |
724 |
* ExecutionException on failed task |
725 |
*/ |
726 |
public void testInvokeAll4() throws Throwable { |
727 |
ExecutorService e = new ForkJoinPool(1); |
728 |
try (PoolCleaner cleaner = cleaner(e)) { |
729 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
730 |
l.add(new NPETask()); |
731 |
List<Future<String>> futures = e.invokeAll(l); |
732 |
assertEquals(1, futures.size()); |
733 |
try { |
734 |
futures.get(0).get(); |
735 |
shouldThrow(); |
736 |
} catch (ExecutionException success) { |
737 |
assertTrue(success.getCause() instanceof NullPointerException); |
738 |
} |
739 |
} |
740 |
} |
741 |
|
742 |
/** |
743 |
* invokeAll(c) returns results of all completed tasks in c |
744 |
*/ |
745 |
public void testInvokeAll5() throws Throwable { |
746 |
ExecutorService e = new ForkJoinPool(1); |
747 |
try (PoolCleaner cleaner = cleaner(e)) { |
748 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
749 |
l.add(new StringTask()); |
750 |
l.add(new StringTask()); |
751 |
List<Future<String>> futures = e.invokeAll(l); |
752 |
assertEquals(2, futures.size()); |
753 |
for (Future<String> future : futures) |
754 |
assertSame(TEST_STRING, future.get()); |
755 |
} |
756 |
} |
757 |
|
758 |
/** |
759 |
* timed invokeAny(null) throws NullPointerException |
760 |
*/ |
761 |
public void testTimedInvokeAny1() throws Throwable { |
762 |
ExecutorService e = new ForkJoinPool(1); |
763 |
try (PoolCleaner cleaner = cleaner(e)) { |
764 |
try { |
765 |
e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS); |
766 |
shouldThrow(); |
767 |
} catch (NullPointerException success) {} |
768 |
} |
769 |
} |
770 |
|
771 |
/** |
772 |
* timed invokeAny(null time unit) throws NullPointerException |
773 |
*/ |
774 |
public void testTimedInvokeAnyNullTimeUnit() throws Throwable { |
775 |
ExecutorService e = new ForkJoinPool(1); |
776 |
try (PoolCleaner cleaner = cleaner(e)) { |
777 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
778 |
l.add(new StringTask()); |
779 |
try { |
780 |
e.invokeAny(l, MEDIUM_DELAY_MS, null); |
781 |
shouldThrow(); |
782 |
} catch (NullPointerException success) {} |
783 |
} |
784 |
} |
785 |
|
786 |
/** |
787 |
* timed invokeAny(empty collection) throws IllegalArgumentException |
788 |
*/ |
789 |
public void testTimedInvokeAny2() throws Throwable { |
790 |
ExecutorService e = new ForkJoinPool(1); |
791 |
try (PoolCleaner cleaner = cleaner(e)) { |
792 |
try { |
793 |
e.invokeAny(new ArrayList<Callable<String>>(), |
794 |
MEDIUM_DELAY_MS, MILLISECONDS); |
795 |
shouldThrow(); |
796 |
} catch (IllegalArgumentException success) {} |
797 |
} |
798 |
} |
799 |
|
800 |
/** |
801 |
* timed invokeAny(c) throws NullPointerException if c has null elements |
802 |
*/ |
803 |
public void testTimedInvokeAny3() throws Throwable { |
804 |
CountDownLatch latch = new CountDownLatch(1); |
805 |
ExecutorService e = new ForkJoinPool(1); |
806 |
try (PoolCleaner cleaner = cleaner(e)) { |
807 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
808 |
l.add(latchAwaitingStringTask(latch)); |
809 |
l.add(null); |
810 |
try { |
811 |
e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS); |
812 |
shouldThrow(); |
813 |
} catch (NullPointerException success) {} |
814 |
latch.countDown(); |
815 |
} |
816 |
} |
817 |
|
818 |
/** |
819 |
* timed invokeAny(c) throws ExecutionException if no task completes |
820 |
*/ |
821 |
public void testTimedInvokeAny4() throws Throwable { |
822 |
ExecutorService e = new ForkJoinPool(1); |
823 |
try (PoolCleaner cleaner = cleaner(e)) { |
824 |
long startTime = System.nanoTime(); |
825 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
826 |
l.add(new NPETask()); |
827 |
try { |
828 |
e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS); |
829 |
shouldThrow(); |
830 |
} catch (ExecutionException success) { |
831 |
assertTrue(success.getCause() instanceof NullPointerException); |
832 |
} |
833 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
834 |
} |
835 |
} |
836 |
|
837 |
/** |
838 |
* timed invokeAny(c) returns result of some task in c |
839 |
*/ |
840 |
public void testTimedInvokeAny5() throws Throwable { |
841 |
ExecutorService e = new ForkJoinPool(1); |
842 |
try (PoolCleaner cleaner = cleaner(e)) { |
843 |
long startTime = System.nanoTime(); |
844 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
845 |
l.add(new StringTask()); |
846 |
l.add(new StringTask()); |
847 |
String result = e.invokeAny(l, LONG_DELAY_MS, MILLISECONDS); |
848 |
assertSame(TEST_STRING, result); |
849 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
850 |
} |
851 |
} |
852 |
|
853 |
/** |
854 |
* timed invokeAll(null) throws NullPointerException |
855 |
*/ |
856 |
public void testTimedInvokeAll1() throws Throwable { |
857 |
ExecutorService e = new ForkJoinPool(1); |
858 |
try (PoolCleaner cleaner = cleaner(e)) { |
859 |
try { |
860 |
e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS); |
861 |
shouldThrow(); |
862 |
} catch (NullPointerException success) {} |
863 |
} |
864 |
} |
865 |
|
866 |
/** |
867 |
* timed invokeAll(null time unit) throws NullPointerException |
868 |
*/ |
869 |
public void testTimedInvokeAllNullTimeUnit() throws Throwable { |
870 |
ExecutorService e = new ForkJoinPool(1); |
871 |
try (PoolCleaner cleaner = cleaner(e)) { |
872 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
873 |
l.add(new StringTask()); |
874 |
try { |
875 |
e.invokeAll(l, MEDIUM_DELAY_MS, null); |
876 |
shouldThrow(); |
877 |
} catch (NullPointerException success) {} |
878 |
} |
879 |
} |
880 |
|
881 |
/** |
882 |
* timed invokeAll(empty collection) returns empty collection |
883 |
*/ |
884 |
public void testTimedInvokeAll2() throws InterruptedException { |
885 |
ExecutorService e = new ForkJoinPool(1); |
886 |
try (PoolCleaner cleaner = cleaner(e)) { |
887 |
List<Future<String>> r |
888 |
= e.invokeAll(new ArrayList<Callable<String>>(), |
889 |
MEDIUM_DELAY_MS, MILLISECONDS); |
890 |
assertTrue(r.isEmpty()); |
891 |
} |
892 |
} |
893 |
|
894 |
/** |
895 |
* timed invokeAll(c) throws NullPointerException if c has null elements |
896 |
*/ |
897 |
public void testTimedInvokeAll3() throws InterruptedException { |
898 |
ExecutorService e = new ForkJoinPool(1); |
899 |
try (PoolCleaner cleaner = cleaner(e)) { |
900 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
901 |
l.add(new StringTask()); |
902 |
l.add(null); |
903 |
try { |
904 |
e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS); |
905 |
shouldThrow(); |
906 |
} catch (NullPointerException success) {} |
907 |
} |
908 |
} |
909 |
|
910 |
/** |
911 |
* get of returned element of invokeAll(c) throws exception on failed task |
912 |
*/ |
913 |
public void testTimedInvokeAll4() throws Throwable { |
914 |
ExecutorService e = new ForkJoinPool(1); |
915 |
try (PoolCleaner cleaner = cleaner(e)) { |
916 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
917 |
l.add(new NPETask()); |
918 |
List<Future<String>> futures |
919 |
= e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS); |
920 |
assertEquals(1, futures.size()); |
921 |
try { |
922 |
futures.get(0).get(); |
923 |
shouldThrow(); |
924 |
} catch (ExecutionException success) { |
925 |
assertTrue(success.getCause() instanceof NullPointerException); |
926 |
} |
927 |
} |
928 |
} |
929 |
|
930 |
/** |
931 |
* timed invokeAll(c) returns results of all completed tasks in c |
932 |
*/ |
933 |
public void testTimedInvokeAll5() throws Throwable { |
934 |
ForkJoinPool e = new ForkJoinPool(1); |
935 |
try (PoolCleaner cleaner = cleaner(e)) { |
936 |
List<Callable<String>> l = new ArrayList<Callable<String>>(); |
937 |
l.add(new StringTask()); |
938 |
l.add(new StringTask()); |
939 |
List<Future<String>> futures |
940 |
= e.invokeAll(l, LONG_DELAY_MS, MILLISECONDS); |
941 |
assertEquals(2, futures.size()); |
942 |
for (Future<String> future : futures) |
943 |
assertSame(TEST_STRING, future.get()); |
944 |
} |
945 |
} |
946 |
|
947 |
} |