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/* |
/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
* 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 |
* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
* 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 static java.util.concurrent.TimeUnit.MILLISECONDS; |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
import static java.util.concurrent.TimeUnit.NANOSECONDS; |
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import java.util.*; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.NoSuchElementException; |
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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.Executors; |
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import java.util.concurrent.ExecutorService; |
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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 junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class FutureTaskTest extends JSR166TestCase { |
public class FutureTaskTest extends JSR166TestCase { |
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public static void main(String[] args) { |
public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
main(suite(), args); |
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} |
} |
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public static Test suite() { |
public static Test suite() { |
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return new TestSuite(FutureTaskTest.class); |
return new TestSuite(FutureTaskTest.class); |
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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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Object r = null; Object exInfo = null; |
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try { |
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r = f.get(); |
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} catch (CancellationException t) { |
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exInfo = CancellationException.class; |
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} catch (ExecutionException t) { |
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exInfo = t.getCause(); |
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} catch (Throwable t) { |
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threadUnexpectedException(t); |
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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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pf.run(); |
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pf.runAndReset(); |
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assertEquals(savedRunCount, pf.runCount()); |
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Object r2 = null; |
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try { |
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r2 = f.get(); |
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} catch (CancellationException t) { |
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assertSame(exInfo, CancellationException.class); |
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} catch (ExecutionException t) { |
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assertSame(exInfo, t.getCause()); |
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} catch (Throwable t) { |
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threadUnexpectedException(t); |
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} |
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if (exInfo == null) |
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assertSame(r, r2); |
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assertTrue(f.isDone()); |
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} |
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} |
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void checkNotDone(Future<?> f) { |
void checkNotDone(Future<?> f) { |
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assertFalse(f.isDone()); |
assertFalse(f.isDone()); |
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assertFalse(f.isCancelled()); |
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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<T> void checkCompletedNormally(Future<T> f, T expected) { |
void checkIsRunning(Future<?> f) { |
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assertTrue(f.isDone()); |
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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PublicFutureTask pf = (PublicFutureTask) f; |
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int savedRunCount = pf.runCount(); |
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pf.run(); |
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assertFalse(pf.runAndReset()); |
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assertEquals(savedRunCount, pf.runCount()); |
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} |
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checkNotDone(f); |
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} |
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} |
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<T> void checkCompletedNormally(Future<T> f, T expectedValue) { |
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checkIsDone(f); |
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assertFalse(f.isCancelled()); |
assertFalse(f.isCancelled()); |
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T v1 = null, v2 = null; |
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try { |
try { |
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assertSame(expected, f.get()); |
v1 = f.get(); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
v2 = f.get(randomTimeout(), randomTimeUnit()); |
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try { |
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assertSame(expected, f.get(5L, SECONDS)); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
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assertSame(expectedValue, v1); |
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assertFalse(f.cancel(false)); |
assertSame(expectedValue, v2); |
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assertFalse(f.cancel(true)); |
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} |
} |
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void checkCancelled(Future<?> f) { |
void checkCancelled(Future<?> f) { |
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assertTrue(f.isDone()); |
checkIsDone(f); |
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assertTrue(f.isCancelled()); |
assertTrue(f.isCancelled()); |
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try { |
try { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
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try { |
try { |
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f.get(5L, SECONDS); |
f.get(randomTimeout(), randomTimeUnit()); |
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shouldThrow(); |
shouldThrow(); |
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} catch (CancellationException success) { |
} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
135 |
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} |
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assertFalse(f.cancel(false)); |
void tryToConfuseDoneTask(PublicFutureTask pf) { |
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assertFalse(f.cancel(true)); |
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(mayInterruptIfRunning); |
142 |
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} |
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} |
} |
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void checkCompletedAbnormally(Future<?> f, Throwable t) { |
void checkCompletedAbnormally(Future<?> f, Throwable t) { |
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assertTrue(f.isDone()); |
checkIsDone(f); |
147 |
assertFalse(f.isCancelled()); |
assertFalse(f.isCancelled()); |
148 |
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149 |
try { |
try { |
154 |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
155 |
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156 |
try { |
try { |
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f.get(5L, SECONDS); |
f.get(randomTimeout(), randomTimeUnit()); |
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shouldThrow(); |
shouldThrow(); |
159 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
160 |
assertSame(t, success.getCause()); |
assertSame(t, success.getCause()); |
161 |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
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assertFalse(f.cancel(false)); |
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assertFalse(f.cancel(true)); |
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162 |
} |
} |
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/** |
/** |
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* Subclass to expose protected methods |
* Subclass to expose protected methods |
166 |
*/ |
*/ |
167 |
static class PublicFutureTask extends FutureTask { |
static class PublicFutureTask extends FutureTask { |
168 |
public PublicFutureTask(Callable r) { super(r); } |
private final AtomicInteger runCount; |
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public boolean runAndReset() { return super.runAndReset(); } |
private final AtomicInteger doneCount = new AtomicInteger(0); |
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public void set(Object x) { super.set(x); } |
private final AtomicInteger runAndResetCount = new AtomicInteger(0); |
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public void setException(Throwable t) { super.setException(t); } |
private final AtomicInteger setCount = new AtomicInteger(0); |
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private final AtomicInteger setExceptionCount = new AtomicInteger(0); |
173 |
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public int runCount() { return runCount.get(); } |
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public int doneCount() { return doneCount.get(); } |
175 |
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public int runAndResetCount() { return runAndResetCount.get(); } |
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public int setCount() { return setCount.get(); } |
177 |
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public int setExceptionCount() { return setExceptionCount.get(); } |
178 |
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179 |
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PublicFutureTask(Runnable runnable) { |
180 |
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this(runnable, seven); |
181 |
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} |
182 |
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PublicFutureTask(Runnable runnable, Object result) { |
183 |
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this(runnable, result, new AtomicInteger(0)); |
184 |
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} |
185 |
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private PublicFutureTask(final Runnable runnable, Object result, |
186 |
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final AtomicInteger runCount) { |
187 |
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super(new Runnable() { |
188 |
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public void run() { |
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runCount.getAndIncrement(); |
190 |
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runnable.run(); |
191 |
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}}, result); |
192 |
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this.runCount = runCount; |
193 |
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} |
194 |
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PublicFutureTask(Callable callable) { |
195 |
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this(callable, new AtomicInteger(0)); |
196 |
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} |
197 |
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private PublicFutureTask(final Callable callable, |
198 |
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final AtomicInteger runCount) { |
199 |
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super(new Callable() { |
200 |
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public Object call() throws Exception { |
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runCount.getAndIncrement(); |
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return callable.call(); |
203 |
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}}); |
204 |
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this.runCount = runCount; |
205 |
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} |
206 |
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@Override public void done() { |
207 |
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assertTrue(isDone()); |
208 |
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doneCount.incrementAndGet(); |
209 |
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super.done(); |
210 |
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} |
211 |
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@Override public boolean runAndReset() { |
212 |
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runAndResetCount.incrementAndGet(); |
213 |
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return super.runAndReset(); |
214 |
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} |
215 |
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@Override public void set(Object x) { |
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setCount.incrementAndGet(); |
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super.set(x); |
218 |
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} |
219 |
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@Override public void setException(Throwable t) { |
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setExceptionCount.incrementAndGet(); |
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super.setException(t); |
222 |
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} |
223 |
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} |
224 |
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class Counter extends CheckedRunnable { |
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final AtomicInteger count = new AtomicInteger(0); |
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public int get() { return count.get(); } |
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public void realRun() { |
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count.getAndIncrement(); |
230 |
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} |
231 |
} |
} |
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/** |
/** |
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* Creating a future with a null callable throws NPE |
* creating a future with a null callable throws NullPointerException |
235 |
*/ |
*/ |
236 |
public void testConstructor() { |
public void testConstructor() { |
237 |
try { |
try { |
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FutureTask task = new FutureTask(null); |
new FutureTask(null); |
239 |
shouldThrow(); |
shouldThrow(); |
240 |
} catch (NullPointerException success) {} |
} catch (NullPointerException success) {} |
241 |
} |
} |
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243 |
/** |
/** |
244 |
* creating a future with null runnable fails |
* creating a future with null runnable throws NullPointerException |
245 |
*/ |
*/ |
246 |
public void testConstructor2() { |
public void testConstructor2() { |
247 |
try { |
try { |
248 |
FutureTask task = new FutureTask(null, Boolean.TRUE); |
new FutureTask(null, Boolean.TRUE); |
249 |
shouldThrow(); |
shouldThrow(); |
250 |
} catch (NullPointerException success) {} |
} catch (NullPointerException success) {} |
251 |
} |
} |
254 |
* isDone is true when a task completes |
* isDone is true when a task completes |
255 |
*/ |
*/ |
256 |
public void testIsDone() { |
public void testIsDone() { |
257 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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assertFalse(task.isDone()); |
259 |
task.run(); |
task.run(); |
260 |
assertTrue(task.isDone()); |
assertTrue(task.isDone()); |
261 |
checkCompletedNormally(task, Boolean.TRUE); |
checkCompletedNormally(task, Boolean.TRUE); |
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assertEquals(1, task.runCount()); |
263 |
} |
} |
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/** |
/** |
267 |
*/ |
*/ |
268 |
public void testRunAndReset() { |
public void testRunAndReset() { |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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for (int i = 0; i < 3; i++) { |
271 |
assertTrue(task.runAndReset()); |
assertTrue(task.runAndReset()); |
272 |
checkNotDone(task); |
checkNotDone(task); |
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assertEquals(i + 1, task.runCount()); |
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assertEquals(i + 1, task.runAndResetCount()); |
275 |
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assertEquals(0, task.setCount()); |
276 |
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assertEquals(0, task.setExceptionCount()); |
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} |
278 |
} |
} |
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/** |
/** |
281 |
* runAndReset after cancellation fails |
* runAndReset after cancellation fails |
282 |
*/ |
*/ |
283 |
public void testResetAfterCancel() { |
public void testRunAndResetAfterCancel() { |
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for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
285 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
286 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(mayInterruptIfRunning)); |
287 |
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for (int i = 0; i < 3; i++) { |
288 |
assertFalse(task.runAndReset()); |
assertFalse(task.runAndReset()); |
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assertEquals(0, task.runCount()); |
290 |
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assertEquals(i + 1, task.runAndResetCount()); |
291 |
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assertEquals(0, task.setCount()); |
292 |
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assertEquals(0, task.setExceptionCount()); |
293 |
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} |
294 |
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tryToConfuseDoneTask(task); |
295 |
checkCancelled(task); |
checkCancelled(task); |
296 |
} |
} |
297 |
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} |
298 |
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299 |
/** |
/** |
300 |
* setting value causes get to return it |
* setting value causes get to return it |
302 |
public void testSet() throws Exception { |
public void testSet() throws Exception { |
303 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
304 |
task.set(one); |
task.set(one); |
305 |
assertSame(task.get(), one); |
for (int i = 0; i < 3; i++) { |
306 |
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assertSame(one, task.get()); |
307 |
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assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS)); |
308 |
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assertEquals(1, task.setCount()); |
309 |
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} |
310 |
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tryToConfuseDoneTask(task); |
311 |
checkCompletedNormally(task, one); |
checkCompletedNormally(task, one); |
312 |
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assertEquals(0, task.runCount()); |
313 |
} |
} |
314 |
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|
315 |
/** |
/** |
316 |
* setException causes get to throw ExecutionException |
* setException causes get to throw ExecutionException |
317 |
*/ |
*/ |
318 |
public void testSetException() throws Exception { |
public void testSetException_get() throws Exception { |
319 |
Exception nse = new NoSuchElementException(); |
Exception nse = new NoSuchElementException(); |
320 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
321 |
task.setException(nse); |
task.setException(nse); |
322 |
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323 |
try { |
try { |
324 |
Object x = task.get(); |
task.get(); |
325 |
shouldThrow(); |
shouldThrow(); |
326 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
327 |
assertSame(success.getCause(), nse); |
assertSame(nse, success.getCause()); |
328 |
checkCompletedAbnormally(task, nse); |
checkCompletedAbnormally(task, nse); |
329 |
} |
} |
330 |
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331 |
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try { |
332 |
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task.get(LONG_DELAY_MS, MILLISECONDS); |
333 |
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shouldThrow(); |
334 |
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} catch (ExecutionException success) { |
335 |
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assertSame(nse, success.getCause()); |
336 |
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checkCompletedAbnormally(task, nse); |
337 |
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} |
338 |
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339 |
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assertEquals(1, task.setExceptionCount()); |
340 |
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assertEquals(0, task.setCount()); |
341 |
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tryToConfuseDoneTask(task); |
342 |
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checkCompletedAbnormally(task, nse); |
343 |
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assertEquals(0, task.runCount()); |
344 |
} |
} |
345 |
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|
346 |
/** |
/** |
347 |
* Cancelling before running succeeds |
* cancel(false) before run succeeds |
348 |
*/ |
*/ |
349 |
public void testCancelBeforeRun() { |
public void testCancelBeforeRun() { |
350 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
351 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(false)); |
352 |
task.run(); |
task.run(); |
353 |
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assertEquals(0, task.runCount()); |
354 |
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assertEquals(0, task.setCount()); |
355 |
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assertEquals(0, task.setExceptionCount()); |
356 |
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assertTrue(task.isCancelled()); |
357 |
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assertTrue(task.isDone()); |
358 |
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tryToConfuseDoneTask(task); |
359 |
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assertEquals(0, task.runCount()); |
360 |
checkCancelled(task); |
checkCancelled(task); |
361 |
} |
} |
362 |
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|
363 |
/** |
/** |
364 |
* Cancel(true) before run succeeds |
* cancel(true) before run succeeds |
365 |
*/ |
*/ |
366 |
public void testCancelBeforeRun2() { |
public void testCancelBeforeRun2() { |
367 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
368 |
assertTrue(task.cancel(true)); |
assertTrue(task.cancel(true)); |
369 |
task.run(); |
task.run(); |
370 |
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assertEquals(0, task.runCount()); |
371 |
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assertEquals(0, task.setCount()); |
372 |
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assertEquals(0, task.setExceptionCount()); |
373 |
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assertTrue(task.isCancelled()); |
374 |
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assertTrue(task.isDone()); |
375 |
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tryToConfuseDoneTask(task); |
376 |
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assertEquals(0, task.runCount()); |
377 |
checkCancelled(task); |
checkCancelled(task); |
378 |
} |
} |
379 |
|
|
380 |
/** |
/** |
381 |
* cancel of a completed task fails |
* cancel(false) of a completed task fails |
382 |
*/ |
*/ |
383 |
public void testCancelAfterRun() { |
public void testCancelAfterRun() { |
384 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
385 |
task.run(); |
task.run(); |
386 |
assertFalse(task.cancel(false)); |
assertFalse(task.cancel(false)); |
387 |
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assertEquals(1, task.runCount()); |
388 |
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assertEquals(1, task.setCount()); |
389 |
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assertEquals(0, task.setExceptionCount()); |
390 |
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tryToConfuseDoneTask(task); |
391 |
checkCompletedNormally(task, Boolean.TRUE); |
checkCompletedNormally(task, Boolean.TRUE); |
392 |
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assertEquals(1, task.runCount()); |
393 |
} |
} |
394 |
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|
395 |
/** |
/** |
396 |
* cancel(true) interrupts a running task |
* cancel(true) of a completed task fails |
397 |
*/ |
*/ |
398 |
public void testCancelInterrupt() throws InterruptedException { |
public void testCancelAfterRun2() { |
399 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
400 |
final FutureTask task = |
task.run(); |
401 |
new FutureTask(new CheckedCallable<Object>() { |
assertFalse(task.cancel(true)); |
402 |
public Object realCall() { |
assertEquals(1, task.runCount()); |
403 |
threadStarted.countDown(); |
assertEquals(1, task.setCount()); |
404 |
long t0 = System.nanoTime(); |
assertEquals(0, task.setExceptionCount()); |
405 |
for (;;) { |
tryToConfuseDoneTask(task); |
406 |
if (Thread.interrupted()) |
checkCompletedNormally(task, Boolean.TRUE); |
407 |
return Boolean.TRUE; |
assertEquals(1, task.runCount()); |
|
if (millisElapsedSince(t0) > MEDIUM_DELAY_MS) |
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fail("interrupt not delivered"); |
|
|
Thread.yield(); |
|
408 |
} |
} |
409 |
|
|
410 |
|
/** |
411 |
|
* cancel(true) interrupts a running task that subsequently succeeds |
412 |
|
*/ |
413 |
|
public void testCancelInterrupt() { |
414 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
415 |
|
final PublicFutureTask task = |
416 |
|
new PublicFutureTask(new CheckedRunnable() { |
417 |
|
public void realRun() { |
418 |
|
pleaseCancel.countDown(); |
419 |
|
try { |
420 |
|
delay(LONG_DELAY_MS); |
421 |
|
shouldThrow(); |
422 |
|
} catch (InterruptedException success) {} |
423 |
|
assertFalse(Thread.interrupted()); |
424 |
}}); |
}}); |
425 |
|
|
426 |
Thread t = newStartedThread(task); |
Thread t = newStartedThread(task); |
427 |
threadStarted.await(); |
await(pleaseCancel); |
428 |
assertTrue(task.cancel(true)); |
assertTrue(task.cancel(true)); |
429 |
|
assertTrue(task.isCancelled()); |
430 |
|
assertTrue(task.isDone()); |
431 |
|
awaitTermination(t); |
432 |
|
assertEquals(1, task.runCount()); |
433 |
|
assertEquals(1, task.setCount()); |
434 |
|
assertEquals(0, task.setExceptionCount()); |
435 |
|
tryToConfuseDoneTask(task); |
436 |
checkCancelled(task); |
checkCancelled(task); |
437 |
awaitTermination(t, MEDIUM_DELAY_MS); |
} |
438 |
|
|
439 |
|
/** |
440 |
|
* cancel(true) tries to interrupt a running task, but |
441 |
|
* Thread.interrupt throws (simulating a restrictive security |
442 |
|
* manager) |
443 |
|
*/ |
444 |
|
public void testCancelInterrupt_ThrowsSecurityException() { |
445 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
446 |
|
final CountDownLatch cancelled = new CountDownLatch(1); |
447 |
|
final PublicFutureTask task = |
448 |
|
new PublicFutureTask(new CheckedRunnable() { |
449 |
|
public void realRun() { |
450 |
|
pleaseCancel.countDown(); |
451 |
|
await(cancelled); |
452 |
|
assertFalse(Thread.interrupted()); |
453 |
|
}}); |
454 |
|
|
455 |
|
final Thread t = new Thread(task) { |
456 |
|
// Simulate a restrictive security manager. |
457 |
|
@Override public void interrupt() { |
458 |
|
throw new SecurityException(); |
459 |
|
}}; |
460 |
|
t.setDaemon(true); |
461 |
|
t.start(); |
462 |
|
|
463 |
|
await(pleaseCancel); |
464 |
|
try { |
465 |
|
task.cancel(true); |
466 |
|
shouldThrow(); |
467 |
|
} catch (SecurityException expected) {} |
468 |
|
|
469 |
|
// We failed to deliver the interrupt, but the world retains |
470 |
|
// its sanity, as if we had done task.cancel(false) |
471 |
|
assertTrue(task.isCancelled()); |
472 |
|
assertTrue(task.isDone()); |
473 |
|
assertEquals(1, task.runCount()); |
474 |
|
assertEquals(1, task.doneCount()); |
475 |
|
assertEquals(0, task.setCount()); |
476 |
|
assertEquals(0, task.setExceptionCount()); |
477 |
|
cancelled.countDown(); |
478 |
|
awaitTermination(t); |
479 |
|
assertEquals(1, task.setCount()); |
480 |
|
assertEquals(0, task.setExceptionCount()); |
481 |
|
tryToConfuseDoneTask(task); |
482 |
|
checkCancelled(task); |
483 |
|
} |
484 |
|
|
485 |
|
/** |
486 |
|
* cancel(true) interrupts a running task that subsequently throws |
487 |
|
*/ |
488 |
|
public void testCancelInterrupt_taskFails() { |
489 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
490 |
|
final PublicFutureTask task = |
491 |
|
new PublicFutureTask(new Runnable() { |
492 |
|
public void run() { |
493 |
|
pleaseCancel.countDown(); |
494 |
|
try { |
495 |
|
delay(LONG_DELAY_MS); |
496 |
|
threadShouldThrow(); |
497 |
|
} catch (InterruptedException success) { |
498 |
|
} catch (Throwable t) { threadUnexpectedException(t); } |
499 |
|
throw new RuntimeException(); |
500 |
|
}}); |
501 |
|
|
502 |
|
Thread t = newStartedThread(task); |
503 |
|
await(pleaseCancel); |
504 |
|
assertTrue(task.cancel(true)); |
505 |
|
assertTrue(task.isCancelled()); |
506 |
|
awaitTermination(t); |
507 |
|
assertEquals(1, task.runCount()); |
508 |
|
assertEquals(0, task.setCount()); |
509 |
|
assertEquals(1, task.setExceptionCount()); |
510 |
|
tryToConfuseDoneTask(task); |
511 |
checkCancelled(task); |
checkCancelled(task); |
512 |
} |
} |
513 |
|
|
514 |
/** |
/** |
515 |
* cancel(false) does not interrupt a running task |
* cancel(false) does not interrupt a running task |
516 |
*/ |
*/ |
517 |
public void testCancelNoInterrupt() throws InterruptedException { |
public void testCancelNoInterrupt() { |
518 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
519 |
final CountDownLatch cancelled = new CountDownLatch(1); |
final CountDownLatch cancelled = new CountDownLatch(1); |
520 |
final FutureTask<Boolean> task = |
final PublicFutureTask task = |
521 |
new FutureTask<Boolean>(new CheckedCallable<Boolean>() { |
new PublicFutureTask(new CheckedCallable<Boolean>() { |
522 |
public Boolean realCall() throws InterruptedException { |
public Boolean realCall() { |
523 |
threadStarted.countDown(); |
pleaseCancel.countDown(); |
524 |
cancelled.await(MEDIUM_DELAY_MS, MILLISECONDS); |
await(cancelled); |
525 |
assertFalse(Thread.interrupted()); |
assertFalse(Thread.interrupted()); |
526 |
return Boolean.TRUE; |
return Boolean.TRUE; |
527 |
}}); |
}}); |
528 |
|
|
529 |
Thread t = newStartedThread(task); |
Thread t = newStartedThread(task); |
530 |
threadStarted.await(); |
await(pleaseCancel); |
531 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(false)); |
532 |
checkCancelled(task); |
assertTrue(task.isCancelled()); |
533 |
cancelled.countDown(); |
cancelled.countDown(); |
534 |
awaitTermination(t, MEDIUM_DELAY_MS); |
awaitTermination(t); |
535 |
|
assertEquals(1, task.runCount()); |
536 |
|
assertEquals(1, task.setCount()); |
537 |
|
assertEquals(0, task.setExceptionCount()); |
538 |
|
tryToConfuseDoneTask(task); |
539 |
checkCancelled(task); |
checkCancelled(task); |
540 |
} |
} |
541 |
|
|
542 |
/** |
/** |
543 |
* set in one thread causes get in another thread to retrieve value |
* run in one thread causes get in another thread to retrieve value |
544 |
*/ |
*/ |
545 |
public void testGet1() throws InterruptedException { |
public void testGetRun() { |
546 |
final FutureTask task = |
final CountDownLatch pleaseRun = new CountDownLatch(2); |
547 |
new FutureTask(new CheckedCallable<Object>() { |
|
548 |
public Object realCall() throws InterruptedException { |
final PublicFutureTask task = |
549 |
return Boolean.TRUE; |
new PublicFutureTask(new CheckedCallable<Object>() { |
550 |
|
public Object realCall() { |
551 |
|
return two; |
552 |
}}); |
}}); |
|
checkNotDone(task); |
|
553 |
|
|
554 |
Thread t = newStartedThread(new CheckedRunnable() { |
Thread t1 = newStartedThread(new CheckedRunnable() { |
555 |
|
public void realRun() throws Exception { |
556 |
|
pleaseRun.countDown(); |
557 |
|
assertSame(two, task.get()); |
558 |
|
}}); |
559 |
|
|
560 |
|
Thread t2 = newStartedThread(new CheckedRunnable() { |
561 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
562 |
assertSame(Boolean.TRUE, task.get()); |
pleaseRun.countDown(); |
563 |
|
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
564 |
}}); |
}}); |
565 |
|
|
566 |
|
await(pleaseRun); |
567 |
|
checkNotDone(task); |
568 |
|
assertTrue(t1.isAlive()); |
569 |
|
assertTrue(t2.isAlive()); |
570 |
task.run(); |
task.run(); |
571 |
checkCompletedNormally(task, Boolean.TRUE); |
checkCompletedNormally(task, two); |
572 |
awaitTermination(t, MEDIUM_DELAY_MS); |
assertEquals(1, task.runCount()); |
573 |
|
assertEquals(1, task.setCount()); |
574 |
|
assertEquals(0, task.setExceptionCount()); |
575 |
|
awaitTermination(t1); |
576 |
|
awaitTermination(t2); |
577 |
|
tryToConfuseDoneTask(task); |
578 |
|
checkCompletedNormally(task, two); |
579 |
} |
} |
580 |
|
|
581 |
/** |
/** |
582 |
* set in one thread causes timed get in another thread to retrieve value |
* set in one thread causes get in another thread to retrieve value |
583 |
*/ |
*/ |
584 |
public void testTimedGet1() throws InterruptedException { |
public void testGetSet() { |
585 |
final FutureTask task = |
final CountDownLatch pleaseSet = new CountDownLatch(2); |
586 |
new FutureTask(new CheckedCallable<Object>() { |
|
587 |
|
final PublicFutureTask task = |
588 |
|
new PublicFutureTask(new CheckedCallable<Object>() { |
589 |
public Object realCall() throws InterruptedException { |
public Object realCall() throws InterruptedException { |
590 |
return Boolean.TRUE; |
return two; |
591 |
}}); |
}}); |
|
checkNotDone(task); |
|
592 |
|
|
593 |
Thread t = newStartedThread(new CheckedRunnable() { |
Thread t1 = newStartedThread(new CheckedRunnable() { |
594 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
595 |
assertSame(Boolean.TRUE, task.get(SMALL_DELAY_MS, MILLISECONDS)); |
pleaseSet.countDown(); |
596 |
|
assertSame(two, task.get()); |
597 |
}}); |
}}); |
598 |
|
|
599 |
task.run(); |
Thread t2 = newStartedThread(new CheckedRunnable() { |
600 |
checkCompletedNormally(task, Boolean.TRUE); |
public void realRun() throws Exception { |
601 |
awaitTermination(t, MEDIUM_DELAY_MS); |
pleaseSet.countDown(); |
602 |
} |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
|
|
|
|
/** |
|
|
* Cancelling a task causes timed get in another thread to throw |
|
|
* CancellationException |
|
|
*/ |
|
|
public void testTimedGet_Cancellation() throws InterruptedException { |
|
|
final CountDownLatch threadStarted = new CountDownLatch(2); |
|
|
final FutureTask task = |
|
|
new FutureTask(new CheckedInterruptedCallable<Object>() { |
|
|
public Object realCall() throws InterruptedException { |
|
|
threadStarted.countDown(); |
|
|
Thread.sleep(LONG_DELAY_MS); |
|
|
return Boolean.TRUE; |
|
603 |
}}); |
}}); |
604 |
|
|
605 |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
await(pleaseSet); |
606 |
public void realRun() throws Exception { |
checkNotDone(task); |
607 |
threadStarted.countDown(); |
assertTrue(t1.isAlive()); |
608 |
task.get(MEDIUM_DELAY_MS, MILLISECONDS); |
assertTrue(t2.isAlive()); |
609 |
}}; |
task.set(two); |
610 |
Thread t2 = new Thread(task); |
assertEquals(0, task.runCount()); |
611 |
t1.start(); |
assertEquals(1, task.setCount()); |
612 |
t2.start(); |
assertEquals(0, task.setExceptionCount()); |
613 |
threadStarted.await(); |
tryToConfuseDoneTask(task); |
614 |
task.cancel(true); |
checkCompletedNormally(task, two); |
615 |
awaitTermination(t1, MEDIUM_DELAY_MS); |
awaitTermination(t1); |
616 |
awaitTermination(t2, MEDIUM_DELAY_MS); |
awaitTermination(t2); |
|
checkCancelled(task); |
|
617 |
} |
} |
618 |
|
|
619 |
/** |
/** |
620 |
* Cancelling a task causes get in another thread to throw |
* Cancelling a task causes timed get in another thread to throw |
621 |
* CancellationException |
* CancellationException |
622 |
*/ |
*/ |
623 |
public void testGet_Cancellation() throws InterruptedException { |
public void testTimedGet_Cancellation() { |
624 |
final CountDownLatch threadStarted = new CountDownLatch(2); |
testTimedGet_Cancellation(false); |
625 |
final FutureTask task = |
} |
626 |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
public void testTimedGet_Cancellation_interrupt() { |
627 |
|
testTimedGet_Cancellation(true); |
628 |
|
} |
629 |
|
public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) { |
630 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(3); |
631 |
|
final CountDownLatch cancelled = new CountDownLatch(1); |
632 |
|
final Callable<Object> callable = |
633 |
|
new CheckedCallable<Object>() { |
634 |
public Object realCall() throws InterruptedException { |
public Object realCall() throws InterruptedException { |
635 |
threadStarted.countDown(); |
pleaseCancel.countDown(); |
636 |
Thread.sleep(LONG_DELAY_MS); |
if (mayInterruptIfRunning) { |
637 |
return Boolean.TRUE; |
try { |
638 |
}}); |
delay(2*LONG_DELAY_MS); |
639 |
|
} catch (InterruptedException success) {} |
640 |
|
} else { |
641 |
|
await(cancelled); |
642 |
|
} |
643 |
|
return two; |
644 |
|
}}; |
645 |
|
final PublicFutureTask task = new PublicFutureTask(callable); |
646 |
|
|
647 |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
648 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
649 |
threadStarted.countDown(); |
pleaseCancel.countDown(); |
650 |
task.get(); |
task.get(); |
651 |
}}; |
}}; |
652 |
Thread t2 = new Thread(task); |
Thread t2 = new ThreadShouldThrow(CancellationException.class) { |
653 |
|
public void realRun() throws Exception { |
654 |
|
pleaseCancel.countDown(); |
655 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
656 |
|
}}; |
657 |
t1.start(); |
t1.start(); |
658 |
t2.start(); |
t2.start(); |
659 |
threadStarted.await(); |
Thread t3 = newStartedThread(task); |
660 |
task.cancel(true); |
await(pleaseCancel); |
661 |
awaitTermination(t1, MEDIUM_DELAY_MS); |
checkIsRunning(task); |
662 |
awaitTermination(t2, MEDIUM_DELAY_MS); |
task.cancel(mayInterruptIfRunning); |
663 |
|
checkCancelled(task); |
664 |
|
awaitTermination(t1); |
665 |
|
awaitTermination(t2); |
666 |
|
cancelled.countDown(); |
667 |
|
awaitTermination(t3); |
668 |
|
assertEquals(1, task.runCount()); |
669 |
|
assertEquals(1, task.setCount()); |
670 |
|
assertEquals(0, task.setExceptionCount()); |
671 |
|
tryToConfuseDoneTask(task); |
672 |
checkCancelled(task); |
checkCancelled(task); |
673 |
} |
} |
674 |
|
|
|
|
|
675 |
/** |
/** |
676 |
* A runtime exception in task causes get to throw ExecutionException |
* A runtime exception in task causes get to throw ExecutionException |
677 |
*/ |
*/ |
678 |
public void testGet_ExecutionException() throws InterruptedException { |
public void testGet_ExecutionException() throws InterruptedException { |
679 |
final FutureTask task = new FutureTask(new Callable() { |
final ArithmeticException e = new ArithmeticException(); |
680 |
|
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
681 |
public Object call() { |
public Object call() { |
682 |
return 5/0; |
throw e; |
683 |
}}); |
}}); |
684 |
|
|
685 |
task.run(); |
task.run(); |
686 |
|
assertEquals(1, task.runCount()); |
687 |
|
assertEquals(0, task.setCount()); |
688 |
|
assertEquals(1, task.setExceptionCount()); |
689 |
try { |
try { |
690 |
task.get(); |
task.get(); |
691 |
shouldThrow(); |
shouldThrow(); |
692 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
693 |
assertTrue(success.getCause() instanceof ArithmeticException); |
assertSame(e, success.getCause()); |
694 |
|
tryToConfuseDoneTask(task); |
695 |
checkCompletedAbnormally(task, success.getCause()); |
checkCompletedAbnormally(task, success.getCause()); |
696 |
} |
} |
697 |
} |
} |
700 |
* A runtime exception in task causes timed get to throw ExecutionException |
* A runtime exception in task causes timed get to throw ExecutionException |
701 |
*/ |
*/ |
702 |
public void testTimedGet_ExecutionException2() throws Exception { |
public void testTimedGet_ExecutionException2() throws Exception { |
703 |
final FutureTask task = new FutureTask(new Callable() { |
final ArithmeticException e = new ArithmeticException(); |
704 |
|
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
705 |
public Object call() { |
public Object call() { |
706 |
return 5/0; |
throw e; |
707 |
}}); |
}}); |
708 |
|
|
709 |
task.run(); |
task.run(); |
710 |
try { |
try { |
711 |
task.get(SHORT_DELAY_MS, MILLISECONDS); |
task.get(LONG_DELAY_MS, MILLISECONDS); |
712 |
shouldThrow(); |
shouldThrow(); |
713 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
714 |
assertTrue(success.getCause() instanceof ArithmeticException); |
assertSame(e, success.getCause()); |
715 |
|
tryToConfuseDoneTask(task); |
716 |
checkCompletedAbnormally(task, success.getCause()); |
checkCompletedAbnormally(task, success.getCause()); |
717 |
} |
} |
718 |
} |
} |
719 |
|
|
|
|
|
720 |
/** |
/** |
721 |
* Interrupting a waiting get causes it to throw InterruptedException |
* get is interruptible |
722 |
*/ |
*/ |
723 |
public void testGet_InterruptedException() throws InterruptedException { |
public void testGet_interruptible() { |
724 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
725 |
final FutureTask task = new FutureTask(new NoOpCallable()); |
final FutureTask task = new FutureTask(new NoOpCallable()); |
726 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
Thread t = newStartedThread(new CheckedRunnable() { |
727 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
728 |
threadStarted.countDown(); |
Thread.currentThread().interrupt(); |
729 |
|
try { |
730 |
task.get(); |
task.get(); |
731 |
|
shouldThrow(); |
732 |
|
} catch (InterruptedException success) {} |
733 |
|
assertFalse(Thread.interrupted()); |
734 |
|
|
735 |
|
pleaseInterrupt.countDown(); |
736 |
|
try { |
737 |
|
task.get(); |
738 |
|
shouldThrow(); |
739 |
|
} catch (InterruptedException success) {} |
740 |
|
assertFalse(Thread.interrupted()); |
741 |
}}); |
}}); |
742 |
|
|
743 |
threadStarted.await(); |
await(pleaseInterrupt); |
744 |
t.interrupt(); |
t.interrupt(); |
745 |
awaitTermination(t, MEDIUM_DELAY_MS); |
awaitTermination(t); |
746 |
checkNotDone(task); |
checkNotDone(task); |
747 |
} |
} |
748 |
|
|
749 |
/** |
/** |
750 |
* Interrupting a waiting timed get causes it to throw InterruptedException |
* timed get is interruptible |
751 |
*/ |
*/ |
752 |
public void testTimedGet_InterruptedException2() throws InterruptedException { |
public void testTimedGet_interruptible() { |
753 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
754 |
final FutureTask task = new FutureTask(new NoOpCallable()); |
final FutureTask task = new FutureTask(new NoOpCallable()); |
755 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
Thread t = newStartedThread(new CheckedRunnable() { |
756 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
757 |
threadStarted.countDown(); |
Thread.currentThread().interrupt(); |
758 |
task.get(LONG_DELAY_MS, MILLISECONDS); |
try { |
759 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
760 |
|
shouldThrow(); |
761 |
|
} catch (InterruptedException success) {} |
762 |
|
assertFalse(Thread.interrupted()); |
763 |
|
|
764 |
|
pleaseInterrupt.countDown(); |
765 |
|
try { |
766 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
767 |
|
shouldThrow(); |
768 |
|
} catch (InterruptedException success) {} |
769 |
|
assertFalse(Thread.interrupted()); |
770 |
}}); |
}}); |
771 |
|
|
772 |
threadStarted.await(); |
await(pleaseInterrupt); |
773 |
t.interrupt(); |
t.interrupt(); |
774 |
awaitTermination(t, MEDIUM_DELAY_MS); |
awaitTermination(t); |
775 |
checkNotDone(task); |
checkNotDone(task); |
776 |
} |
} |
777 |
|
|
779 |
* A timed out timed get throws TimeoutException |
* A timed out timed get throws TimeoutException |
780 |
*/ |
*/ |
781 |
public void testGet_TimeoutException() throws Exception { |
public void testGet_TimeoutException() throws Exception { |
782 |
|
FutureTask task = new FutureTask(new NoOpCallable()); |
783 |
|
long startTime = System.nanoTime(); |
784 |
try { |
try { |
785 |
|
task.get(timeoutMillis(), MILLISECONDS); |
786 |
|
shouldThrow(); |
787 |
|
} catch (TimeoutException success) { |
788 |
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
789 |
|
} |
790 |
|
} |
791 |
|
|
792 |
|
/** |
793 |
|
* timed get with null TimeUnit throws NullPointerException |
794 |
|
*/ |
795 |
|
public void testGet_NullTimeUnit() throws Exception { |
796 |
FutureTask task = new FutureTask(new NoOpCallable()); |
FutureTask task = new FutureTask(new NoOpCallable()); |
797 |
task.get(1, MILLISECONDS); |
long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE }; |
798 |
|
|
799 |
|
for (long timeout : timeouts) { |
800 |
|
try { |
801 |
|
task.get(timeout, null); |
802 |
|
shouldThrow(); |
803 |
|
} catch (NullPointerException success) {} |
804 |
|
} |
805 |
|
|
806 |
|
task.run(); |
807 |
|
|
808 |
|
for (long timeout : timeouts) { |
809 |
|
try { |
810 |
|
task.get(timeout, null); |
811 |
shouldThrow(); |
shouldThrow(); |
812 |
} catch (TimeoutException success) {} |
} catch (NullPointerException success) {} |
813 |
|
} |
814 |
|
} |
815 |
|
|
816 |
|
/** |
817 |
|
* timed get with most negative timeout works correctly (i.e. no |
818 |
|
* underflow bug) |
819 |
|
*/ |
820 |
|
public void testGet_NegativeInfinityTimeout() throws Exception { |
821 |
|
final ExecutorService pool = Executors.newFixedThreadPool(10); |
822 |
|
final Runnable nop = new Runnable() { public void run() {}}; |
823 |
|
final FutureTask<Void> task = new FutureTask<>(nop, null); |
824 |
|
final List<Future<?>> futures = new ArrayList<>(); |
825 |
|
Runnable r = new Runnable() { public void run() { |
826 |
|
for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) { |
827 |
|
try { |
828 |
|
task.get(timeout, NANOSECONDS); |
829 |
|
shouldThrow(); |
830 |
|
} catch (TimeoutException success) { |
831 |
|
} catch (Throwable fail) {threadUnexpectedException(fail);}}}}; |
832 |
|
for (int i = 0; i < 10; i++) |
833 |
|
futures.add(pool.submit(r)); |
834 |
|
try { |
835 |
|
joinPool(pool); |
836 |
|
for (Future<?> future : futures) |
837 |
|
checkCompletedNormally(future, null); |
838 |
|
} finally { |
839 |
|
task.run(); // last resort to help terminate |
840 |
|
} |
841 |
|
} |
842 |
|
|
843 |
|
/** |
844 |
|
* toString indicates current completion state |
845 |
|
*/ |
846 |
|
public void testToString_incomplete() { |
847 |
|
FutureTask<String> f = new FutureTask<>(() -> ""); |
848 |
|
assertTrue(f.toString().matches(".*\\[.*Not completed.*\\]")); |
849 |
|
if (testImplementationDetails) |
850 |
|
assertTrue(f.toString().startsWith( |
851 |
|
identityString(f) + "[Not completed, task =")); |
852 |
|
} |
853 |
|
|
854 |
|
public void testToString_normal() { |
855 |
|
FutureTask<String> f = new FutureTask<>(() -> ""); |
856 |
|
f.run(); |
857 |
|
assertTrue(f.toString().matches(".*\\[.*Completed normally.*\\]")); |
858 |
|
if (testImplementationDetails) |
859 |
|
assertEquals(identityString(f) + "[Completed normally]", |
860 |
|
f.toString()); |
861 |
|
} |
862 |
|
|
863 |
|
public void testToString_exception() { |
864 |
|
FutureTask<String> f = new FutureTask<>( |
865 |
|
() -> { throw new ArithmeticException(); }); |
866 |
|
f.run(); |
867 |
|
assertTrue(f.toString().matches(".*\\[.*Completed exceptionally.*\\]")); |
868 |
|
if (testImplementationDetails) |
869 |
|
assertTrue(f.toString().startsWith( |
870 |
|
identityString(f) + "[Completed exceptionally: ")); |
871 |
|
} |
872 |
|
|
873 |
|
public void testToString_cancelled() { |
874 |
|
for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
875 |
|
FutureTask<String> f = new FutureTask<>(() -> ""); |
876 |
|
assertTrue(f.cancel(mayInterruptIfRunning)); |
877 |
|
assertTrue(f.toString().matches(".*\\[.*Cancelled.*\\]")); |
878 |
|
if (testImplementationDetails) |
879 |
|
assertEquals(identityString(f) + "[Cancelled]", |
880 |
|
f.toString()); |
881 |
|
} |
882 |
} |
} |
883 |
|
|
884 |
} |
} |