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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/licenses/publicdomain |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.*; |
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import java.security.Permission; |
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import java.util.concurrent.Callable; |
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import java.util.concurrent.CancellationException; |
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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.Future; |
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import java.util.concurrent.FutureTask; |
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import java.util.concurrent.TimeoutException; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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import java.util.*; |
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|
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public class FutureTaskTest extends JSR166TestCase { |
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return new TestSuite(FutureTaskTest.class); |
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} |
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|
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void checkIsDone(Future<?> f) { |
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assertTrue(f.isDone()); |
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assertFalse(f.cancel(false)); |
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assertFalse(f.cancel(true)); |
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if (f instanceof PublicFutureTask) { |
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PublicFutureTask pf = (PublicFutureTask) f; |
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assertEquals(1, pf.doneCount()); |
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assertFalse(pf.runAndReset()); |
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assertEquals(1, pf.doneCount()); |
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|
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// Check that run and runAndReset have no effect. |
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int savedRunCount = pf.runCount(); |
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int savedSetCount = pf.setCount(); |
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int savedSetExceptionCount = pf.setExceptionCount(); |
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pf.run(); |
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pf.runAndReset(); |
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assertEquals(savedRunCount, pf.runCount()); |
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assertEquals(savedSetCount, pf.setCount()); |
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assertEquals(savedSetExceptionCount, pf.setExceptionCount()); |
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assertTrue(f.isDone()); |
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} |
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} |
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|
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void checkNotDone(Future<?> f) { |
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assertFalse(f.isDone()); |
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assertFalse(f.isCancelled()); |
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if (f instanceof PublicFutureTask) { |
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PublicFutureTask pf = (PublicFutureTask) f; |
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assertEquals(0, pf.doneCount()); |
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assertEquals(0, pf.setCount()); |
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assertEquals(0, pf.setExceptionCount()); |
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} |
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} |
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|
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void checkIsRunning(Future<?> f) { |
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checkNotDone(f); |
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if (f instanceof FutureTask) { |
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FutureTask ft = (FutureTask<?>) f; |
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// Check that run methods do nothing |
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ft.run(); |
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if (f instanceof PublicFutureTask) |
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assertFalse(((PublicFutureTask) f).runAndReset()); |
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checkNotDone(f); |
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} |
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} |
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|
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<T> void checkCompletedNormally(Future<T> f, T expected) { |
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checkIsDone(f); |
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assertFalse(f.isCancelled()); |
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|
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try { |
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assertSame(expected, f.get()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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try { |
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assertSame(expected, f.get(5L, SECONDS)); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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} |
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|
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void checkCancelled(Future<?> f) { |
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checkIsDone(f); |
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assertTrue(f.isCancelled()); |
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|
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try { |
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f.get(); |
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shouldThrow(); |
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} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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|
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try { |
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f.get(5L, SECONDS); |
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shouldThrow(); |
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} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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} |
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|
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void tryToConfuseDoneTask(PublicFutureTask pf) { |
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pf.set(new Object()); |
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pf.setException(new Error()); |
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for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
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pf.cancel(true); |
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} |
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} |
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|
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void checkCompletedAbnormally(Future<?> f, Throwable t) { |
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checkIsDone(f); |
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assertFalse(f.isCancelled()); |
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|
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try { |
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f.get(); |
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shouldThrow(); |
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} catch (ExecutionException success) { |
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assertSame(t, success.getCause()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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|
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try { |
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f.get(5L, SECONDS); |
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shouldThrow(); |
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} catch (ExecutionException success) { |
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assertSame(t, success.getCause()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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} |
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|
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/** |
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* Subclass to expose protected methods |
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*/ |
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static class PublicFutureTask extends FutureTask { |
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public PublicFutureTask(Callable r) { super(r); } |
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public boolean runAndReset() { return super.runAndReset(); } |
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public void set(Object x) { super.set(x); } |
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public void setException(Throwable t) { super.setException(t); } |
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private final AtomicInteger runCount; |
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private final AtomicInteger doneCount = new AtomicInteger(0); |
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private final AtomicInteger runAndResetCount = new AtomicInteger(0); |
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private final AtomicInteger setCount = new AtomicInteger(0); |
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private final AtomicInteger setExceptionCount = new AtomicInteger(0); |
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public int runCount() { return runCount.get(); } |
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public int doneCount() { return doneCount.get(); } |
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public int runAndResetCount() { return runAndResetCount.get(); } |
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public int setCount() { return setCount.get(); } |
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public int setExceptionCount() { return setExceptionCount.get(); } |
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|
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PublicFutureTask(Runnable runnable) { |
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this(runnable, seven); |
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} |
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PublicFutureTask(Runnable runnable, Object result) { |
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this(runnable, result, new AtomicInteger(0)); |
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} |
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private PublicFutureTask(final Runnable runnable, Object result, |
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final AtomicInteger runCount) { |
157 |
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super(new Runnable() { |
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public void run() { |
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runCount.getAndIncrement(); |
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runnable.run(); |
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}}, result); |
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this.runCount = runCount; |
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} |
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PublicFutureTask(Callable callable) { |
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this(callable, new AtomicInteger(0)); |
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} |
167 |
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private PublicFutureTask(final Callable callable, |
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final AtomicInteger runCount) { |
169 |
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super(new Callable() { |
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public Object call() throws Exception { |
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runCount.getAndIncrement(); |
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return callable.call(); |
173 |
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}}); |
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this.runCount = runCount; |
175 |
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} |
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> |
@Override public void done() { |
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assertTrue(isDone()); |
178 |
> |
doneCount.incrementAndGet(); |
179 |
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super.done(); |
180 |
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} |
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> |
@Override public boolean runAndReset() { |
182 |
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runAndResetCount.incrementAndGet(); |
183 |
> |
return super.runAndReset(); |
184 |
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} |
185 |
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@Override public void set(Object x) { |
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setCount.incrementAndGet(); |
187 |
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super.set(x); |
188 |
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} |
189 |
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@Override public void setException(Throwable t) { |
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setExceptionCount.incrementAndGet(); |
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> |
super.setException(t); |
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} |
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} |
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> |
|
195 |
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class Counter extends CheckedRunnable { |
196 |
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final AtomicInteger count = new AtomicInteger(0); |
197 |
> |
public int get() { return count.get(); } |
198 |
> |
public void realRun() { |
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count.getAndIncrement(); |
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} |
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} |
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|
203 |
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/** |
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* Creating a future with a null callable throws NPE |
204 |
> |
* creating a future with a null callable throws NullPointerException |
205 |
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*/ |
206 |
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public void testConstructor() { |
207 |
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try { |
208 |
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FutureTask task = new FutureTask(null); |
208 |
> |
new FutureTask(null); |
209 |
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shouldThrow(); |
210 |
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} catch (NullPointerException success) {} |
211 |
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} |
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|
213 |
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/** |
214 |
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* creating a future with null runnable fails |
214 |
> |
* creating a future with null runnable throws NullPointerException |
215 |
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*/ |
216 |
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public void testConstructor2() { |
217 |
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try { |
218 |
< |
FutureTask task = new FutureTask(null, Boolean.TRUE); |
218 |
> |
new FutureTask(null, Boolean.TRUE); |
219 |
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shouldThrow(); |
220 |
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} catch (NullPointerException success) {} |
221 |
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} |
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* isDone is true when a task completes |
225 |
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*/ |
226 |
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public void testIsDone() { |
227 |
< |
FutureTask task = new FutureTask(new NoOpCallable()); |
227 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
228 |
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assertFalse(task.isDone()); |
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task.run(); |
230 |
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assertTrue(task.isDone()); |
231 |
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assertFalse(task.isCancelled()); |
231 |
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checkCompletedNormally(task, Boolean.TRUE); |
232 |
> |
assertEquals(1, task.runCount()); |
233 |
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} |
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|
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/** |
237 |
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*/ |
238 |
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public void testRunAndReset() { |
239 |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
240 |
< |
assertTrue(task.runAndReset()); |
241 |
< |
assertFalse(task.isDone()); |
240 |
> |
for (int i = 0; i < 3; i++) { |
241 |
> |
assertTrue(task.runAndReset()); |
242 |
> |
checkNotDone(task); |
243 |
> |
assertEquals(i+1, task.runCount()); |
244 |
> |
assertEquals(i+1, task.runAndResetCount()); |
245 |
> |
assertEquals(0, task.setCount()); |
246 |
> |
assertEquals(0, task.setExceptionCount()); |
247 |
> |
} |
248 |
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} |
249 |
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|
250 |
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/** |
251 |
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* runAndReset after cancellation fails |
252 |
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*/ |
253 |
< |
public void testResetAfterCancel() { |
254 |
< |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
255 |
< |
assertTrue(task.cancel(false)); |
256 |
< |
assertFalse(task.runAndReset()); |
257 |
< |
assertTrue(task.isDone()); |
258 |
< |
assertTrue(task.isCancelled()); |
253 |
> |
public void testRunAndResetAfterCancel() { |
254 |
> |
for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
255 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
256 |
> |
assertTrue(task.cancel(mayInterruptIfRunning)); |
257 |
> |
for (int i = 0; i < 3; i++) { |
258 |
> |
assertFalse(task.runAndReset()); |
259 |
> |
assertEquals(0, task.runCount()); |
260 |
> |
assertEquals(i+1, task.runAndResetCount()); |
261 |
> |
assertEquals(0, task.setCount()); |
262 |
> |
assertEquals(0, task.setExceptionCount()); |
263 |
> |
} |
264 |
> |
tryToConfuseDoneTask(task); |
265 |
> |
checkCancelled(task); |
266 |
> |
} |
267 |
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} |
268 |
|
|
83 |
– |
|
84 |
– |
|
269 |
|
/** |
270 |
|
* setting value causes get to return it |
271 |
|
*/ |
272 |
|
public void testSet() throws Exception { |
273 |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
274 |
|
task.set(one); |
275 |
< |
assertSame(task.get(), one); |
275 |
> |
for (int i = 0; i < 3; i++) { |
276 |
> |
assertSame(one, task.get()); |
277 |
> |
assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS)); |
278 |
> |
assertEquals(1, task.setCount()); |
279 |
> |
} |
280 |
> |
tryToConfuseDoneTask(task); |
281 |
> |
checkCompletedNormally(task, one); |
282 |
> |
assertEquals(0, task.runCount()); |
283 |
|
} |
284 |
|
|
285 |
|
/** |
286 |
|
* setException causes get to throw ExecutionException |
287 |
|
*/ |
288 |
< |
public void testSetException() throws Exception { |
288 |
> |
public void testSetException_get() throws Exception { |
289 |
|
Exception nse = new NoSuchElementException(); |
290 |
|
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
291 |
|
task.setException(nse); |
292 |
+ |
|
293 |
+ |
try { |
294 |
+ |
task.get(); |
295 |
+ |
shouldThrow(); |
296 |
+ |
} catch (ExecutionException success) { |
297 |
+ |
assertSame(nse, success.getCause()); |
298 |
+ |
checkCompletedAbnormally(task, nse); |
299 |
+ |
} |
300 |
+ |
|
301 |
|
try { |
302 |
< |
Object x = task.get(); |
302 |
> |
task.get(LONG_DELAY_MS, MILLISECONDS); |
303 |
|
shouldThrow(); |
304 |
|
} catch (ExecutionException success) { |
305 |
< |
assertSame(success.getCause(), nse); |
305 |
> |
assertSame(nse, success.getCause()); |
306 |
> |
checkCompletedAbnormally(task, nse); |
307 |
|
} |
308 |
+ |
|
309 |
+ |
assertEquals(1, task.setExceptionCount()); |
310 |
+ |
assertEquals(0, task.setCount()); |
311 |
+ |
tryToConfuseDoneTask(task); |
312 |
+ |
checkCompletedAbnormally(task, nse); |
313 |
+ |
assertEquals(0, task.runCount()); |
314 |
|
} |
315 |
|
|
316 |
|
/** |
317 |
< |
* Cancelling before running succeeds |
317 |
> |
* cancel(false) before run succeeds |
318 |
|
*/ |
319 |
|
public void testCancelBeforeRun() { |
320 |
< |
FutureTask task = new FutureTask(new NoOpCallable()); |
320 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
321 |
|
assertTrue(task.cancel(false)); |
322 |
|
task.run(); |
323 |
< |
assertTrue(task.isDone()); |
323 |
> |
assertEquals(0, task.runCount()); |
324 |
> |
assertEquals(0, task.setCount()); |
325 |
> |
assertEquals(0, task.setExceptionCount()); |
326 |
|
assertTrue(task.isCancelled()); |
327 |
+ |
assertTrue(task.isDone()); |
328 |
+ |
tryToConfuseDoneTask(task); |
329 |
+ |
assertEquals(0, task.runCount()); |
330 |
+ |
checkCancelled(task); |
331 |
|
} |
332 |
|
|
333 |
|
/** |
334 |
< |
* Cancel(true) before run succeeds |
334 |
> |
* cancel(true) before run succeeds |
335 |
|
*/ |
336 |
|
public void testCancelBeforeRun2() { |
337 |
< |
FutureTask task = new FutureTask(new NoOpCallable()); |
337 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
338 |
|
assertTrue(task.cancel(true)); |
339 |
|
task.run(); |
340 |
< |
assertTrue(task.isDone()); |
340 |
> |
assertEquals(0, task.runCount()); |
341 |
> |
assertEquals(0, task.setCount()); |
342 |
> |
assertEquals(0, task.setExceptionCount()); |
343 |
|
assertTrue(task.isCancelled()); |
344 |
+ |
assertTrue(task.isDone()); |
345 |
+ |
tryToConfuseDoneTask(task); |
346 |
+ |
assertEquals(0, task.runCount()); |
347 |
+ |
checkCancelled(task); |
348 |
|
} |
349 |
|
|
350 |
|
/** |
351 |
< |
* cancel of a completed task fails |
351 |
> |
* cancel(false) of a completed task fails |
352 |
|
*/ |
353 |
|
public void testCancelAfterRun() { |
354 |
< |
FutureTask task = new FutureTask(new NoOpCallable()); |
354 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
355 |
|
task.run(); |
356 |
|
assertFalse(task.cancel(false)); |
357 |
< |
assertTrue(task.isDone()); |
358 |
< |
assertFalse(task.isCancelled()); |
357 |
> |
assertEquals(1, task.runCount()); |
358 |
> |
assertEquals(1, task.setCount()); |
359 |
> |
assertEquals(0, task.setExceptionCount()); |
360 |
> |
tryToConfuseDoneTask(task); |
361 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
362 |
> |
assertEquals(1, task.runCount()); |
363 |
|
} |
364 |
|
|
365 |
|
/** |
366 |
< |
* cancel(true) interrupts a running task |
366 |
> |
* cancel(true) of a completed task fails |
367 |
|
*/ |
368 |
< |
public void testCancelInterrupt() throws InterruptedException { |
369 |
< |
final FutureTask task = |
370 |
< |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
371 |
< |
public Object realCall() throws InterruptedException { |
372 |
< |
Thread.sleep(SMALL_DELAY_MS); |
373 |
< |
return Boolean.TRUE; |
368 |
> |
public void testCancelAfterRun2() { |
369 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
370 |
> |
task.run(); |
371 |
> |
assertFalse(task.cancel(true)); |
372 |
> |
assertEquals(1, task.runCount()); |
373 |
> |
assertEquals(1, task.setCount()); |
374 |
> |
assertEquals(0, task.setExceptionCount()); |
375 |
> |
tryToConfuseDoneTask(task); |
376 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
377 |
> |
assertEquals(1, task.runCount()); |
378 |
> |
} |
379 |
> |
|
380 |
> |
/** |
381 |
> |
* cancel(true) interrupts a running task that subsequently succeeds |
382 |
> |
*/ |
383 |
> |
public void testCancelInterrupt() { |
384 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
385 |
> |
final PublicFutureTask task = |
386 |
> |
new PublicFutureTask(new CheckedRunnable() { |
387 |
> |
public void realRun() { |
388 |
> |
pleaseCancel.countDown(); |
389 |
> |
try { |
390 |
> |
delay(LONG_DELAY_MS); |
391 |
> |
shouldThrow(); |
392 |
> |
} catch (InterruptedException success) {} |
393 |
|
}}); |
394 |
|
|
395 |
< |
Thread t = new Thread(task); |
396 |
< |
t.start(); |
155 |
< |
Thread.sleep(SHORT_DELAY_MS); |
395 |
> |
Thread t = newStartedThread(task); |
396 |
> |
await(pleaseCancel); |
397 |
|
assertTrue(task.cancel(true)); |
398 |
< |
t.join(); |
398 |
> |
assertTrue(task.isCancelled()); |
399 |
|
assertTrue(task.isDone()); |
400 |
+ |
awaitTermination(t); |
401 |
+ |
assertEquals(1, task.runCount()); |
402 |
+ |
assertEquals(1, task.setCount()); |
403 |
+ |
assertEquals(0, task.setExceptionCount()); |
404 |
+ |
tryToConfuseDoneTask(task); |
405 |
+ |
checkCancelled(task); |
406 |
+ |
} |
407 |
+ |
|
408 |
+ |
/** |
409 |
+ |
* cancel(true) interrupts a running task that subsequently |
410 |
+ |
* succeeds, with a security manager that does not permit |
411 |
+ |
* Thread.interrupt |
412 |
+ |
*/ |
413 |
+ |
public void testCancelInterrupt_ThrowsSecurityException() { |
414 |
+ |
if (System.getSecurityManager() != null) |
415 |
+ |
return; |
416 |
+ |
|
417 |
+ |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
418 |
+ |
final CountDownLatch cancelled = new CountDownLatch(1); |
419 |
+ |
final PublicFutureTask task = |
420 |
+ |
new PublicFutureTask(new CheckedRunnable() { |
421 |
+ |
public void realRun() { |
422 |
+ |
pleaseCancel.countDown(); |
423 |
+ |
await(cancelled); |
424 |
+ |
assertFalse(Thread.interrupted()); |
425 |
+ |
}}); |
426 |
+ |
|
427 |
+ |
final Thread t = newStartedThread(task); |
428 |
+ |
await(pleaseCancel); |
429 |
+ |
System.setSecurityManager(new SecurityManager() { |
430 |
+ |
public void checkAccess(Thread t) { throw new SecurityException(); } |
431 |
+ |
public void checkPermission(Permission p) {}}); |
432 |
+ |
try { |
433 |
+ |
try { |
434 |
+ |
task.cancel(true); |
435 |
+ |
shouldThrow(); |
436 |
+ |
} |
437 |
+ |
catch (SecurityException expected) {} |
438 |
+ |
} finally { |
439 |
+ |
System.setSecurityManager(null); |
440 |
+ |
} |
441 |
|
assertTrue(task.isCancelled()); |
442 |
+ |
assertTrue(task.isDone()); |
443 |
+ |
assertEquals(1, task.runCount()); |
444 |
+ |
assertEquals(1, task.doneCount()); |
445 |
+ |
assertEquals(0, task.setCount()); |
446 |
+ |
assertEquals(0, task.setExceptionCount()); |
447 |
+ |
cancelled.countDown(); |
448 |
+ |
awaitTermination(t); |
449 |
+ |
assertEquals(1, task.setCount()); |
450 |
+ |
assertEquals(0, task.setExceptionCount()); |
451 |
+ |
tryToConfuseDoneTask(task); |
452 |
+ |
checkCancelled(task); |
453 |
|
} |
454 |
|
|
455 |
+ |
/** |
456 |
+ |
* cancel(true) interrupts a running task that subsequently throws |
457 |
+ |
*/ |
458 |
+ |
public void testCancelInterrupt_taskFails() { |
459 |
+ |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
460 |
+ |
final PublicFutureTask task = |
461 |
+ |
new PublicFutureTask(new Runnable() { |
462 |
+ |
public void run() { |
463 |
+ |
try { |
464 |
+ |
pleaseCancel.countDown(); |
465 |
+ |
delay(LONG_DELAY_MS); |
466 |
+ |
} finally { throw new RuntimeException(); } |
467 |
+ |
}}); |
468 |
+ |
|
469 |
+ |
Thread t = newStartedThread(task); |
470 |
+ |
await(pleaseCancel); |
471 |
+ |
assertTrue(task.cancel(true)); |
472 |
+ |
assertTrue(task.isCancelled()); |
473 |
+ |
awaitTermination(t); |
474 |
+ |
assertEquals(1, task.runCount()); |
475 |
+ |
assertEquals(0, task.setCount()); |
476 |
+ |
assertEquals(1, task.setExceptionCount()); |
477 |
+ |
tryToConfuseDoneTask(task); |
478 |
+ |
checkCancelled(task); |
479 |
+ |
} |
480 |
|
|
481 |
|
/** |
482 |
|
* cancel(false) does not interrupt a running task |
483 |
|
*/ |
484 |
< |
public void testCancelNoInterrupt() throws InterruptedException { |
485 |
< |
final FutureTask task = |
486 |
< |
new FutureTask(new CheckedCallable<Object>() { |
487 |
< |
public Object realCall() throws InterruptedException { |
488 |
< |
Thread.sleep(MEDIUM_DELAY_MS); |
484 |
> |
public void testCancelNoInterrupt() { |
485 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
486 |
> |
final CountDownLatch cancelled = new CountDownLatch(1); |
487 |
> |
final PublicFutureTask task = |
488 |
> |
new PublicFutureTask(new CheckedCallable<Boolean>() { |
489 |
> |
public Boolean realCall() { |
490 |
> |
pleaseCancel.countDown(); |
491 |
> |
await(cancelled); |
492 |
> |
assertFalse(Thread.interrupted()); |
493 |
|
return Boolean.TRUE; |
494 |
|
}}); |
495 |
|
|
496 |
< |
Thread t = new Thread(task); |
497 |
< |
t.start(); |
176 |
< |
Thread.sleep(SHORT_DELAY_MS); |
496 |
> |
Thread t = newStartedThread(task); |
497 |
> |
await(pleaseCancel); |
498 |
|
assertTrue(task.cancel(false)); |
178 |
– |
t.join(); |
179 |
– |
assertTrue(task.isDone()); |
499 |
|
assertTrue(task.isCancelled()); |
500 |
+ |
cancelled.countDown(); |
501 |
+ |
awaitTermination(t); |
502 |
+ |
assertEquals(1, task.runCount()); |
503 |
+ |
assertEquals(1, task.setCount()); |
504 |
+ |
assertEquals(0, task.setExceptionCount()); |
505 |
+ |
tryToConfuseDoneTask(task); |
506 |
+ |
checkCancelled(task); |
507 |
|
} |
508 |
|
|
509 |
|
/** |
510 |
< |
* set in one thread causes get in another thread to retrieve value |
510 |
> |
* run in one thread causes get in another thread to retrieve value |
511 |
|
*/ |
512 |
< |
public void testGet1() throws InterruptedException { |
513 |
< |
final FutureTask ft = |
514 |
< |
new FutureTask(new CheckedCallable<Object>() { |
515 |
< |
public Object realCall() throws InterruptedException { |
516 |
< |
return Boolean.TRUE; |
512 |
> |
public void testGetRun() { |
513 |
> |
final CountDownLatch pleaseRun = new CountDownLatch(2); |
514 |
> |
|
515 |
> |
final PublicFutureTask task = |
516 |
> |
new PublicFutureTask(new CheckedCallable<Object>() { |
517 |
> |
public Object realCall() { |
518 |
> |
return two; |
519 |
|
}}); |
520 |
< |
Thread t = new Thread(new CheckedRunnable() { |
520 |
> |
|
521 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
522 |
|
public void realRun() throws Exception { |
523 |
< |
assertSame(Boolean.TRUE, ft.get()); |
523 |
> |
pleaseRun.countDown(); |
524 |
> |
assertSame(two, task.get()); |
525 |
|
}}); |
526 |
|
|
527 |
< |
assertFalse(ft.isDone()); |
198 |
< |
assertFalse(ft.isCancelled()); |
199 |
< |
t.start(); |
200 |
< |
Thread.sleep(SHORT_DELAY_MS); |
201 |
< |
ft.run(); |
202 |
< |
t.join(); |
203 |
< |
assertTrue(ft.isDone()); |
204 |
< |
assertFalse(ft.isCancelled()); |
205 |
< |
} |
206 |
< |
|
207 |
< |
/** |
208 |
< |
* set in one thread causes timed get in another thread to retrieve value |
209 |
< |
*/ |
210 |
< |
public void testTimedGet1() throws InterruptedException { |
211 |
< |
final FutureTask ft = |
212 |
< |
new FutureTask(new CheckedCallable<Object>() { |
213 |
< |
public Object realCall() throws InterruptedException { |
214 |
< |
return Boolean.TRUE; |
215 |
< |
}}); |
216 |
< |
Thread t = new Thread(new CheckedRunnable() { |
527 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
528 |
|
public void realRun() throws Exception { |
529 |
< |
assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS)); |
529 |
> |
pleaseRun.countDown(); |
530 |
> |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
531 |
|
}}); |
532 |
|
|
533 |
< |
assertFalse(ft.isDone()); |
534 |
< |
assertFalse(ft.isCancelled()); |
535 |
< |
t.start(); |
536 |
< |
Thread.sleep(SHORT_DELAY_MS); |
537 |
< |
ft.run(); |
538 |
< |
t.join(); |
539 |
< |
assertTrue(ft.isDone()); |
540 |
< |
assertFalse(ft.isCancelled()); |
533 |
> |
await(pleaseRun); |
534 |
> |
checkNotDone(task); |
535 |
> |
assertTrue(t1.isAlive()); |
536 |
> |
assertTrue(t2.isAlive()); |
537 |
> |
task.run(); |
538 |
> |
checkCompletedNormally(task, two); |
539 |
> |
assertEquals(1, task.runCount()); |
540 |
> |
assertEquals(1, task.setCount()); |
541 |
> |
assertEquals(0, task.setExceptionCount()); |
542 |
> |
awaitTermination(t1); |
543 |
> |
awaitTermination(t2); |
544 |
> |
tryToConfuseDoneTask(task); |
545 |
> |
checkCompletedNormally(task, two); |
546 |
|
} |
547 |
|
|
548 |
|
/** |
549 |
< |
* Cancelling a task causes timed get in another thread to throw CancellationException |
550 |
< |
*/ |
551 |
< |
public void testTimedGet_Cancellation() throws InterruptedException { |
552 |
< |
final FutureTask ft = |
553 |
< |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
549 |
> |
* set in one thread causes get in another thread to retrieve value |
550 |
> |
*/ |
551 |
> |
public void testGetSet() { |
552 |
> |
final CountDownLatch pleaseSet = new CountDownLatch(2); |
553 |
> |
|
554 |
> |
final PublicFutureTask task = |
555 |
> |
new PublicFutureTask(new CheckedCallable<Object>() { |
556 |
|
public Object realCall() throws InterruptedException { |
557 |
< |
Thread.sleep(SMALL_DELAY_MS); |
239 |
< |
return Boolean.TRUE; |
557 |
> |
return two; |
558 |
|
}}); |
559 |
|
|
560 |
< |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
560 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
561 |
|
public void realRun() throws Exception { |
562 |
< |
ft.get(MEDIUM_DELAY_MS, MILLISECONDS); |
563 |
< |
}}; |
564 |
< |
Thread t2 = new Thread(ft); |
247 |
< |
t1.start(); |
248 |
< |
t2.start(); |
249 |
< |
Thread.sleep(SHORT_DELAY_MS); |
250 |
< |
ft.cancel(true); |
251 |
< |
t1.join(); |
252 |
< |
t2.join(); |
253 |
< |
} |
562 |
> |
pleaseSet.countDown(); |
563 |
> |
assertSame(two, task.get()); |
564 |
> |
}}); |
565 |
|
|
566 |
< |
/** |
256 |
< |
* Cancelling a task causes get in another thread to throw CancellationException |
257 |
< |
*/ |
258 |
< |
public void testGet_Cancellation() throws InterruptedException { |
259 |
< |
final FutureTask ft = |
260 |
< |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
261 |
< |
public Object realCall() throws InterruptedException { |
262 |
< |
Thread.sleep(SMALL_DELAY_MS); |
263 |
< |
return Boolean.TRUE; |
264 |
< |
}}); |
265 |
< |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
566 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
567 |
|
public void realRun() throws Exception { |
568 |
< |
ft.get(); |
569 |
< |
}}; |
568 |
> |
pleaseSet.countDown(); |
569 |
> |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
570 |
> |
}}); |
571 |
|
|
572 |
< |
Thread t2 = new Thread(ft); |
573 |
< |
t1.start(); |
574 |
< |
t2.start(); |
575 |
< |
Thread.sleep(SHORT_DELAY_MS); |
576 |
< |
ft.cancel(true); |
577 |
< |
t1.join(); |
578 |
< |
t2.join(); |
572 |
> |
await(pleaseSet); |
573 |
> |
checkNotDone(task); |
574 |
> |
assertTrue(t1.isAlive()); |
575 |
> |
assertTrue(t2.isAlive()); |
576 |
> |
task.set(two); |
577 |
> |
assertEquals(0, task.runCount()); |
578 |
> |
assertEquals(1, task.setCount()); |
579 |
> |
assertEquals(0, task.setExceptionCount()); |
580 |
> |
tryToConfuseDoneTask(task); |
581 |
> |
checkCompletedNormally(task, two); |
582 |
> |
awaitTermination(t1); |
583 |
> |
awaitTermination(t2); |
584 |
|
} |
585 |
|
|
586 |
+ |
/** |
587 |
+ |
* Cancelling a task causes timed get in another thread to throw |
588 |
+ |
* CancellationException |
589 |
+ |
*/ |
590 |
+ |
public void testTimedGet_Cancellation() { |
591 |
+ |
for (final boolean mayInterruptIfRunning : |
592 |
+ |
new boolean[] { true, false }) { |
593 |
+ |
final CountDownLatch pleaseCancel = new CountDownLatch(3); |
594 |
+ |
final CountDownLatch cancelled = new CountDownLatch(1); |
595 |
+ |
final PublicFutureTask task = |
596 |
+ |
new PublicFutureTask(new CheckedCallable<Object>() { |
597 |
+ |
public Object realCall() throws InterruptedException { |
598 |
+ |
pleaseCancel.countDown(); |
599 |
+ |
if (mayInterruptIfRunning) { |
600 |
+ |
try { |
601 |
+ |
delay(2*LONG_DELAY_MS); |
602 |
+ |
} catch (InterruptedException success) {} |
603 |
+ |
} else { |
604 |
+ |
await(cancelled); |
605 |
+ |
} |
606 |
+ |
return two; |
607 |
+ |
}}); |
608 |
+ |
|
609 |
+ |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
610 |
+ |
public void realRun() throws Exception { |
611 |
+ |
pleaseCancel.countDown(); |
612 |
+ |
task.get(); |
613 |
+ |
}}; |
614 |
+ |
Thread t2 = new ThreadShouldThrow(CancellationException.class) { |
615 |
+ |
public void realRun() throws Exception { |
616 |
+ |
pleaseCancel.countDown(); |
617 |
+ |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
618 |
+ |
}}; |
619 |
+ |
t1.start(); |
620 |
+ |
t2.start(); |
621 |
+ |
Thread t3 = newStartedThread(task); |
622 |
+ |
await(pleaseCancel); |
623 |
+ |
checkIsRunning(task); |
624 |
+ |
task.cancel(mayInterruptIfRunning); |
625 |
+ |
checkCancelled(task); |
626 |
+ |
awaitTermination(t1); |
627 |
+ |
awaitTermination(t2); |
628 |
+ |
cancelled.countDown(); |
629 |
+ |
awaitTermination(t3); |
630 |
+ |
assertEquals(1, task.runCount()); |
631 |
+ |
assertEquals(1, task.setCount()); |
632 |
+ |
assertEquals(0, task.setExceptionCount()); |
633 |
+ |
tryToConfuseDoneTask(task); |
634 |
+ |
checkCancelled(task); |
635 |
+ |
} |
636 |
+ |
} |
637 |
|
|
638 |
|
/** |
639 |
|
* A runtime exception in task causes get to throw ExecutionException |
640 |
|
*/ |
641 |
|
public void testGet_ExecutionException() throws InterruptedException { |
642 |
< |
final FutureTask ft = new FutureTask(new Callable() { |
642 |
> |
final ArithmeticException e = new ArithmeticException(); |
643 |
> |
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
644 |
|
public Object call() { |
645 |
< |
return 5/0; |
645 |
> |
throw e; |
646 |
|
}}); |
647 |
|
|
648 |
< |
ft.run(); |
648 |
> |
task.run(); |
649 |
> |
assertEquals(1, task.runCount()); |
650 |
> |
assertEquals(0, task.setCount()); |
651 |
> |
assertEquals(1, task.setExceptionCount()); |
652 |
|
try { |
653 |
< |
ft.get(); |
653 |
> |
task.get(); |
654 |
|
shouldThrow(); |
655 |
|
} catch (ExecutionException success) { |
656 |
< |
assertTrue(success.getCause() instanceof ArithmeticException); |
656 |
> |
assertSame(e, success.getCause()); |
657 |
> |
tryToConfuseDoneTask(task); |
658 |
> |
checkCompletedAbnormally(task, success.getCause()); |
659 |
|
} |
660 |
|
} |
661 |
|
|
662 |
|
/** |
663 |
< |
* A runtime exception in task causes timed get to throw ExecutionException |
663 |
> |
* A runtime exception in task causes timed get to throw ExecutionException |
664 |
|
*/ |
665 |
|
public void testTimedGet_ExecutionException2() throws Exception { |
666 |
< |
final FutureTask ft = new FutureTask(new Callable() { |
666 |
> |
final ArithmeticException e = new ArithmeticException(); |
667 |
> |
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
668 |
|
public Object call() { |
669 |
< |
return 5/0; |
669 |
> |
throw e; |
670 |
|
}}); |
671 |
|
|
672 |
< |
ft.run(); |
672 |
> |
task.run(); |
673 |
|
try { |
674 |
< |
ft.get(SHORT_DELAY_MS, MILLISECONDS); |
674 |
> |
task.get(LONG_DELAY_MS, MILLISECONDS); |
675 |
|
shouldThrow(); |
676 |
|
} catch (ExecutionException success) { |
677 |
< |
assertTrue(success.getCause() instanceof ArithmeticException); |
677 |
> |
assertSame(e, success.getCause()); |
678 |
> |
tryToConfuseDoneTask(task); |
679 |
> |
checkCompletedAbnormally(task, success.getCause()); |
680 |
|
} |
681 |
|
} |
682 |
|
|
316 |
– |
|
683 |
|
/** |
684 |
< |
* Interrupting a waiting get causes it to throw InterruptedException |
684 |
> |
* get is interruptible |
685 |
|
*/ |
686 |
< |
public void testGet_InterruptedException() throws InterruptedException { |
687 |
< |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
688 |
< |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
686 |
> |
public void testGet_interruptible() { |
687 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
688 |
> |
final FutureTask task = new FutureTask(new NoOpCallable()); |
689 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
690 |
|
public void realRun() throws Exception { |
691 |
< |
ft.get(); |
691 |
> |
Thread.currentThread().interrupt(); |
692 |
> |
try { |
693 |
> |
task.get(); |
694 |
> |
shouldThrow(); |
695 |
> |
} catch (InterruptedException success) {} |
696 |
> |
assertFalse(Thread.interrupted()); |
697 |
> |
|
698 |
> |
pleaseInterrupt.countDown(); |
699 |
> |
try { |
700 |
> |
task.get(); |
701 |
> |
shouldThrow(); |
702 |
> |
} catch (InterruptedException success) {} |
703 |
> |
assertFalse(Thread.interrupted()); |
704 |
|
}}); |
705 |
|
|
706 |
< |
t.start(); |
328 |
< |
Thread.sleep(SHORT_DELAY_MS); |
706 |
> |
await(pleaseInterrupt); |
707 |
|
t.interrupt(); |
708 |
< |
t.join(); |
708 |
> |
awaitTermination(t); |
709 |
> |
checkNotDone(task); |
710 |
|
} |
711 |
|
|
712 |
|
/** |
713 |
< |
* Interrupting a waiting timed get causes it to throw InterruptedException |
713 |
> |
* timed get is interruptible |
714 |
|
*/ |
715 |
< |
public void testTimedGet_InterruptedException2() throws InterruptedException { |
716 |
< |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
717 |
< |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
715 |
> |
public void testTimedGet_interruptible() { |
716 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
717 |
> |
final FutureTask task = new FutureTask(new NoOpCallable()); |
718 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
719 |
|
public void realRun() throws Exception { |
720 |
< |
ft.get(LONG_DELAY_MS,MILLISECONDS); |
720 |
> |
Thread.currentThread().interrupt(); |
721 |
> |
try { |
722 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
723 |
> |
shouldThrow(); |
724 |
> |
} catch (InterruptedException success) {} |
725 |
> |
assertFalse(Thread.interrupted()); |
726 |
> |
|
727 |
> |
pleaseInterrupt.countDown(); |
728 |
> |
try { |
729 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
730 |
> |
shouldThrow(); |
731 |
> |
} catch (InterruptedException success) {} |
732 |
> |
assertFalse(Thread.interrupted()); |
733 |
|
}}); |
734 |
|
|
735 |
< |
t.start(); |
344 |
< |
Thread.sleep(SHORT_DELAY_MS); |
735 |
> |
await(pleaseInterrupt); |
736 |
|
t.interrupt(); |
737 |
< |
t.join(); |
737 |
> |
awaitTermination(t); |
738 |
> |
checkNotDone(task); |
739 |
|
} |
740 |
|
|
741 |
|
/** |
742 |
|
* A timed out timed get throws TimeoutException |
743 |
|
*/ |
744 |
|
public void testGet_TimeoutException() throws Exception { |
745 |
+ |
FutureTask task = new FutureTask(new NoOpCallable()); |
746 |
+ |
long startTime = System.nanoTime(); |
747 |
|
try { |
748 |
< |
FutureTask ft = new FutureTask(new NoOpCallable()); |
355 |
< |
ft.get(1,MILLISECONDS); |
748 |
> |
task.get(timeoutMillis(), MILLISECONDS); |
749 |
|
shouldThrow(); |
750 |
< |
} catch (TimeoutException success) {} |
750 |
> |
} catch (TimeoutException success) { |
751 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
752 |
> |
} |
753 |
> |
} |
754 |
> |
|
755 |
> |
/** |
756 |
> |
* timed get with null TimeUnit throws NullPointerException |
757 |
> |
*/ |
758 |
> |
public void testGet_NullTimeUnit() throws Exception { |
759 |
> |
FutureTask task = new FutureTask(new NoOpCallable()); |
760 |
> |
long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE }; |
761 |
> |
|
762 |
> |
for (long timeout : timeouts) { |
763 |
> |
try { |
764 |
> |
task.get(timeout, null); |
765 |
> |
shouldThrow(); |
766 |
> |
} catch (NullPointerException success) {} |
767 |
> |
} |
768 |
> |
|
769 |
> |
task.run(); |
770 |
> |
|
771 |
> |
for (long timeout : timeouts) { |
772 |
> |
try { |
773 |
> |
task.get(timeout, null); |
774 |
> |
shouldThrow(); |
775 |
> |
} catch (NullPointerException success) {} |
776 |
> |
} |
777 |
|
} |
778 |
|
|
779 |
|
} |