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/* |
/* |
2 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
* Expert Group and released to the public domain, as explained at |
* Expert Group and released to the public domain, as explained at |
4 |
* http://creativecommons.org/licenses/publicdomain |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
* 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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|
|
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import junit.framework.*; |
import junit.framework.*; |
10 |
import java.util.concurrent.*; |
import java.util.concurrent.Callable; |
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import java.util.concurrent.CancellationException; |
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import java.util.concurrent.CountDownLatch; |
13 |
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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; |
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.*; |
import java.util.*; |
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|
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public class FutureTaskTest extends JSR166TestCase { |
public class FutureTaskTest extends JSR166TestCase { |
28 |
return new TestSuite(FutureTaskTest.class); |
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)); |
35 |
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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; |
41 |
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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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|
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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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try { |
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assertSame(r, f.get()); |
58 |
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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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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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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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|
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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(); |
116 |
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} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
118 |
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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(); |
141 |
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} catch (ExecutionException success) { |
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assertSame(t, success.getCause()); |
143 |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
144 |
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|
145 |
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try { |
146 |
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f.get(5L, SECONDS); |
147 |
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shouldThrow(); |
148 |
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} catch (ExecutionException success) { |
149 |
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assertSame(t, success.getCause()); |
150 |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
151 |
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} |
152 |
|
|
153 |
/** |
/** |
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* Subclass to expose protected methods |
* Subclass to expose protected methods |
155 |
*/ |
*/ |
156 |
static class PublicFutureTask extends FutureTask { |
static class PublicFutureTask extends FutureTask { |
157 |
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); |
159 |
public void set(Object x) { super.set(x); } |
private final AtomicInteger runAndResetCount = new AtomicInteger(0); |
160 |
public void setException(Throwable t) { super.setException(t); } |
private final AtomicInteger setCount = new AtomicInteger(0); |
161 |
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private final AtomicInteger setExceptionCount = new AtomicInteger(0); |
162 |
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public int runCount() { return runCount.get(); } |
163 |
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public int doneCount() { return doneCount.get(); } |
164 |
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public int runAndResetCount() { return runAndResetCount.get(); } |
165 |
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public int setCount() { return setCount.get(); } |
166 |
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public int setExceptionCount() { return setExceptionCount.get(); } |
167 |
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|
168 |
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PublicFutureTask(Runnable runnable) { |
169 |
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this(runnable, seven); |
170 |
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} |
171 |
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PublicFutureTask(Runnable runnable, Object result) { |
172 |
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this(runnable, result, new AtomicInteger(0)); |
173 |
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} |
174 |
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private PublicFutureTask(final Runnable runnable, Object result, |
175 |
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final AtomicInteger runCount) { |
176 |
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super(new Runnable() { |
177 |
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public void run() { |
178 |
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runCount.getAndIncrement(); |
179 |
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runnable.run(); |
180 |
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}}, result); |
181 |
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this.runCount = runCount; |
182 |
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} |
183 |
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PublicFutureTask(Callable callable) { |
184 |
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this(callable, new AtomicInteger(0)); |
185 |
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} |
186 |
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private PublicFutureTask(final Callable callable, |
187 |
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final AtomicInteger runCount) { |
188 |
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super(new Callable() { |
189 |
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public Object call() throws Exception { |
190 |
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runCount.getAndIncrement(); |
191 |
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return callable.call(); |
192 |
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}}); |
193 |
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this.runCount = runCount; |
194 |
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} |
195 |
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@Override public void done() { |
196 |
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assertTrue(isDone()); |
197 |
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doneCount.incrementAndGet(); |
198 |
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super.done(); |
199 |
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} |
200 |
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@Override public boolean runAndReset() { |
201 |
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runAndResetCount.incrementAndGet(); |
202 |
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return super.runAndReset(); |
203 |
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} |
204 |
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@Override public void set(Object x) { |
205 |
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setCount.incrementAndGet(); |
206 |
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super.set(x); |
207 |
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} |
208 |
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@Override public void setException(Throwable t) { |
209 |
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setExceptionCount.incrementAndGet(); |
210 |
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super.setException(t); |
211 |
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} |
212 |
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} |
213 |
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|
214 |
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class Counter extends CheckedRunnable { |
215 |
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final AtomicInteger count = new AtomicInteger(0); |
216 |
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public int get() { return count.get(); } |
217 |
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public void realRun() { |
218 |
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count.getAndIncrement(); |
219 |
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} |
220 |
} |
} |
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|
222 |
/** |
/** |
223 |
* Creating a future with a null callable throws NPE |
* creating a future with a null callable throws NullPointerException |
224 |
*/ |
*/ |
225 |
public void testConstructor() { |
public void testConstructor() { |
226 |
try { |
try { |
227 |
FutureTask task = new FutureTask(null); |
new FutureTask(null); |
228 |
shouldThrow(); |
shouldThrow(); |
229 |
} catch (NullPointerException success) {} |
} catch (NullPointerException success) {} |
230 |
} |
} |
231 |
|
|
232 |
/** |
/** |
233 |
* creating a future with null runnable fails |
* creating a future with null runnable throws NullPointerException |
234 |
*/ |
*/ |
235 |
public void testConstructor2() { |
public void testConstructor2() { |
236 |
try { |
try { |
237 |
FutureTask task = new FutureTask(null, Boolean.TRUE); |
new FutureTask(null, Boolean.TRUE); |
238 |
shouldThrow(); |
shouldThrow(); |
239 |
} catch (NullPointerException success) {} |
} catch (NullPointerException success) {} |
240 |
} |
} |
243 |
* isDone is true when a task completes |
* isDone is true when a task completes |
244 |
*/ |
*/ |
245 |
public void testIsDone() { |
public void testIsDone() { |
246 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
247 |
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assertFalse(task.isDone()); |
248 |
task.run(); |
task.run(); |
249 |
assertTrue(task.isDone()); |
assertTrue(task.isDone()); |
250 |
assertFalse(task.isCancelled()); |
checkCompletedNormally(task, Boolean.TRUE); |
251 |
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assertEquals(1, task.runCount()); |
252 |
} |
} |
253 |
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|
254 |
/** |
/** |
256 |
*/ |
*/ |
257 |
public void testRunAndReset() { |
public void testRunAndReset() { |
258 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
259 |
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for (int i = 0; i < 3; i++) { |
260 |
assertTrue(task.runAndReset()); |
assertTrue(task.runAndReset()); |
261 |
assertFalse(task.isDone()); |
checkNotDone(task); |
262 |
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assertEquals(i+1, task.runCount()); |
263 |
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assertEquals(i+1, task.runAndResetCount()); |
264 |
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assertEquals(0, task.setCount()); |
265 |
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assertEquals(0, task.setExceptionCount()); |
266 |
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} |
267 |
} |
} |
268 |
|
|
269 |
/** |
/** |
270 |
* runAndReset after cancellation fails |
* runAndReset after cancellation fails |
271 |
*/ |
*/ |
272 |
public void testResetAfterCancel() { |
public void testRunAndResetAfterCancel() { |
273 |
|
for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
274 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
275 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(mayInterruptIfRunning)); |
276 |
|
for (int i = 0; i < 3; i++) { |
277 |
assertFalse(task.runAndReset()); |
assertFalse(task.runAndReset()); |
278 |
assertTrue(task.isDone()); |
assertEquals(0, task.runCount()); |
279 |
assertTrue(task.isCancelled()); |
assertEquals(i+1, task.runAndResetCount()); |
280 |
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assertEquals(0, task.setCount()); |
281 |
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assertEquals(0, task.setExceptionCount()); |
282 |
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} |
283 |
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tryToConfuseDoneTask(task); |
284 |
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checkCancelled(task); |
285 |
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} |
286 |
} |
} |
|
|
|
|
|
|
287 |
|
|
288 |
/** |
/** |
289 |
* setting value causes get to return it |
* setting value causes get to return it |
291 |
public void testSet() throws Exception { |
public void testSet() throws Exception { |
292 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
293 |
task.set(one); |
task.set(one); |
294 |
assertSame(task.get(), one); |
for (int i = 0; i < 3; i++) { |
295 |
|
assertSame(one, task.get()); |
296 |
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assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS)); |
297 |
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assertEquals(1, task.setCount()); |
298 |
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} |
299 |
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tryToConfuseDoneTask(task); |
300 |
|
checkCompletedNormally(task, one); |
301 |
|
assertEquals(0, task.runCount()); |
302 |
} |
} |
303 |
|
|
304 |
/** |
/** |
305 |
* setException causes get to throw ExecutionException |
* setException causes get to throw ExecutionException |
306 |
*/ |
*/ |
307 |
public void testSetException() throws Exception { |
public void testSetException_get() throws Exception { |
308 |
Exception nse = new NoSuchElementException(); |
Exception nse = new NoSuchElementException(); |
309 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
310 |
task.setException(nse); |
task.setException(nse); |
311 |
|
|
312 |
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try { |
313 |
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task.get(); |
314 |
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shouldThrow(); |
315 |
|
} catch (ExecutionException success) { |
316 |
|
assertSame(nse, success.getCause()); |
317 |
|
checkCompletedAbnormally(task, nse); |
318 |
|
} |
319 |
|
|
320 |
try { |
try { |
321 |
Object x = task.get(); |
task.get(LONG_DELAY_MS, MILLISECONDS); |
322 |
shouldThrow(); |
shouldThrow(); |
323 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
324 |
assertSame(success.getCause(), nse); |
assertSame(nse, success.getCause()); |
325 |
|
checkCompletedAbnormally(task, nse); |
326 |
} |
} |
327 |
|
|
328 |
|
assertEquals(1, task.setExceptionCount()); |
329 |
|
assertEquals(0, task.setCount()); |
330 |
|
tryToConfuseDoneTask(task); |
331 |
|
checkCompletedAbnormally(task, nse); |
332 |
|
assertEquals(0, task.runCount()); |
333 |
} |
} |
334 |
|
|
335 |
/** |
/** |
336 |
* Cancelling before running succeeds |
* cancel(false) before run succeeds |
337 |
*/ |
*/ |
338 |
public void testCancelBeforeRun() { |
public void testCancelBeforeRun() { |
339 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
340 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(false)); |
341 |
task.run(); |
task.run(); |
342 |
assertTrue(task.isDone()); |
assertEquals(0, task.runCount()); |
343 |
|
assertEquals(0, task.setCount()); |
344 |
|
assertEquals(0, task.setExceptionCount()); |
345 |
assertTrue(task.isCancelled()); |
assertTrue(task.isCancelled()); |
346 |
|
assertTrue(task.isDone()); |
347 |
|
tryToConfuseDoneTask(task); |
348 |
|
assertEquals(0, task.runCount()); |
349 |
|
checkCancelled(task); |
350 |
} |
} |
351 |
|
|
352 |
/** |
/** |
353 |
* Cancel(true) before run succeeds |
* cancel(true) before run succeeds |
354 |
*/ |
*/ |
355 |
public void testCancelBeforeRun2() { |
public void testCancelBeforeRun2() { |
356 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
357 |
assertTrue(task.cancel(true)); |
assertTrue(task.cancel(true)); |
358 |
task.run(); |
task.run(); |
359 |
assertTrue(task.isDone()); |
assertEquals(0, task.runCount()); |
360 |
|
assertEquals(0, task.setCount()); |
361 |
|
assertEquals(0, task.setExceptionCount()); |
362 |
assertTrue(task.isCancelled()); |
assertTrue(task.isCancelled()); |
363 |
|
assertTrue(task.isDone()); |
364 |
|
tryToConfuseDoneTask(task); |
365 |
|
assertEquals(0, task.runCount()); |
366 |
|
checkCancelled(task); |
367 |
} |
} |
368 |
|
|
369 |
/** |
/** |
370 |
* cancel of a completed task fails |
* cancel(false) of a completed task fails |
371 |
*/ |
*/ |
372 |
public void testCancelAfterRun() { |
public void testCancelAfterRun() { |
373 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
374 |
task.run(); |
task.run(); |
375 |
assertFalse(task.cancel(false)); |
assertFalse(task.cancel(false)); |
376 |
assertTrue(task.isDone()); |
assertEquals(1, task.runCount()); |
377 |
assertFalse(task.isCancelled()); |
assertEquals(1, task.setCount()); |
378 |
|
assertEquals(0, task.setExceptionCount()); |
379 |
|
tryToConfuseDoneTask(task); |
380 |
|
checkCompletedNormally(task, Boolean.TRUE); |
381 |
|
assertEquals(1, task.runCount()); |
382 |
} |
} |
383 |
|
|
384 |
/** |
/** |
385 |
* cancel(true) interrupts a running task |
* cancel(true) of a completed task fails |
386 |
*/ |
*/ |
387 |
public void testCancelInterrupt() throws InterruptedException { |
public void testCancelAfterRun2() { |
388 |
final FutureTask task = |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
389 |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
task.run(); |
390 |
public Object realCall() throws InterruptedException { |
assertFalse(task.cancel(true)); |
391 |
Thread.sleep(SMALL_DELAY_MS); |
assertEquals(1, task.runCount()); |
392 |
return Boolean.TRUE; |
assertEquals(1, task.setCount()); |
393 |
|
assertEquals(0, task.setExceptionCount()); |
394 |
|
tryToConfuseDoneTask(task); |
395 |
|
checkCompletedNormally(task, Boolean.TRUE); |
396 |
|
assertEquals(1, task.runCount()); |
397 |
|
} |
398 |
|
|
399 |
|
/** |
400 |
|
* cancel(true) interrupts a running task that subsequently succeeds |
401 |
|
*/ |
402 |
|
public void testCancelInterrupt() { |
403 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
404 |
|
final PublicFutureTask task = |
405 |
|
new PublicFutureTask(new CheckedRunnable() { |
406 |
|
public void realRun() { |
407 |
|
pleaseCancel.countDown(); |
408 |
|
try { |
409 |
|
delay(LONG_DELAY_MS); |
410 |
|
shouldThrow(); |
411 |
|
} catch (InterruptedException success) {} |
412 |
}}); |
}}); |
413 |
|
|
414 |
Thread t = new Thread(task); |
Thread t = newStartedThread(task); |
415 |
t.start(); |
await(pleaseCancel); |
|
Thread.sleep(SHORT_DELAY_MS); |
|
416 |
assertTrue(task.cancel(true)); |
assertTrue(task.cancel(true)); |
417 |
t.join(); |
assertTrue(task.isCancelled()); |
418 |
assertTrue(task.isDone()); |
assertTrue(task.isDone()); |
419 |
|
awaitTermination(t); |
420 |
|
assertEquals(1, task.runCount()); |
421 |
|
assertEquals(1, task.setCount()); |
422 |
|
assertEquals(0, task.setExceptionCount()); |
423 |
|
tryToConfuseDoneTask(task); |
424 |
|
checkCancelled(task); |
425 |
|
} |
426 |
|
|
427 |
|
/** |
428 |
|
* cancel(true) tries to interrupt a running task, but |
429 |
|
* Thread.interrupt throws (simulating a restrictive security |
430 |
|
* manager) |
431 |
|
*/ |
432 |
|
public void testCancelInterrupt_ThrowsSecurityException() { |
433 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
434 |
|
final CountDownLatch cancelled = new CountDownLatch(1); |
435 |
|
final PublicFutureTask task = |
436 |
|
new PublicFutureTask(new CheckedRunnable() { |
437 |
|
public void realRun() { |
438 |
|
pleaseCancel.countDown(); |
439 |
|
await(cancelled); |
440 |
|
assertFalse(Thread.interrupted()); |
441 |
|
}}); |
442 |
|
|
443 |
|
final Thread t = new Thread(task) { |
444 |
|
// Simulate a restrictive security manager. |
445 |
|
@Override public void interrupt() { |
446 |
|
throw new SecurityException(); |
447 |
|
}}; |
448 |
|
t.setDaemon(true); |
449 |
|
t.start(); |
450 |
|
|
451 |
|
await(pleaseCancel); |
452 |
|
try { |
453 |
|
task.cancel(true); |
454 |
|
shouldThrow(); |
455 |
|
} catch (SecurityException expected) {} |
456 |
|
|
457 |
|
// We failed to deliver the interrupt, but the world retains |
458 |
|
// its sanity, as if we had done task.cancel(false) |
459 |
assertTrue(task.isCancelled()); |
assertTrue(task.isCancelled()); |
460 |
|
assertTrue(task.isDone()); |
461 |
|
assertEquals(1, task.runCount()); |
462 |
|
assertEquals(1, task.doneCount()); |
463 |
|
assertEquals(0, task.setCount()); |
464 |
|
assertEquals(0, task.setExceptionCount()); |
465 |
|
cancelled.countDown(); |
466 |
|
awaitTermination(t); |
467 |
|
assertEquals(1, task.setCount()); |
468 |
|
assertEquals(0, task.setExceptionCount()); |
469 |
|
tryToConfuseDoneTask(task); |
470 |
|
checkCancelled(task); |
471 |
} |
} |
472 |
|
|
473 |
|
/** |
474 |
|
* cancel(true) interrupts a running task that subsequently throws |
475 |
|
*/ |
476 |
|
public void testCancelInterrupt_taskFails() { |
477 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
478 |
|
final PublicFutureTask task = |
479 |
|
new PublicFutureTask(new Runnable() { |
480 |
|
public void run() { |
481 |
|
try { |
482 |
|
pleaseCancel.countDown(); |
483 |
|
delay(LONG_DELAY_MS); |
484 |
|
threadShouldThrow(); |
485 |
|
} catch (InterruptedException success) { |
486 |
|
} catch (Throwable t) { threadUnexpectedException(t); } |
487 |
|
throw new RuntimeException(); |
488 |
|
}}); |
489 |
|
|
490 |
|
Thread t = newStartedThread(task); |
491 |
|
await(pleaseCancel); |
492 |
|
assertTrue(task.cancel(true)); |
493 |
|
assertTrue(task.isCancelled()); |
494 |
|
awaitTermination(t); |
495 |
|
assertEquals(1, task.runCount()); |
496 |
|
assertEquals(0, task.setCount()); |
497 |
|
assertEquals(1, task.setExceptionCount()); |
498 |
|
tryToConfuseDoneTask(task); |
499 |
|
checkCancelled(task); |
500 |
|
} |
501 |
|
|
502 |
/** |
/** |
503 |
* cancel(false) does not interrupt a running task |
* cancel(false) does not interrupt a running task |
504 |
*/ |
*/ |
505 |
public void testCancelNoInterrupt() throws InterruptedException { |
public void testCancelNoInterrupt() { |
506 |
final FutureTask task = |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
507 |
new FutureTask(new CheckedCallable<Object>() { |
final CountDownLatch cancelled = new CountDownLatch(1); |
508 |
public Object realCall() throws InterruptedException { |
final PublicFutureTask task = |
509 |
Thread.sleep(MEDIUM_DELAY_MS); |
new PublicFutureTask(new CheckedCallable<Boolean>() { |
510 |
|
public Boolean realCall() { |
511 |
|
pleaseCancel.countDown(); |
512 |
|
await(cancelled); |
513 |
|
assertFalse(Thread.interrupted()); |
514 |
return Boolean.TRUE; |
return Boolean.TRUE; |
515 |
}}); |
}}); |
516 |
|
|
517 |
Thread t = new Thread(task); |
Thread t = newStartedThread(task); |
518 |
t.start(); |
await(pleaseCancel); |
|
Thread.sleep(SHORT_DELAY_MS); |
|
519 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(false)); |
|
t.join(); |
|
|
assertTrue(task.isDone()); |
|
520 |
assertTrue(task.isCancelled()); |
assertTrue(task.isCancelled()); |
521 |
|
cancelled.countDown(); |
522 |
|
awaitTermination(t); |
523 |
|
assertEquals(1, task.runCount()); |
524 |
|
assertEquals(1, task.setCount()); |
525 |
|
assertEquals(0, task.setExceptionCount()); |
526 |
|
tryToConfuseDoneTask(task); |
527 |
|
checkCancelled(task); |
528 |
} |
} |
529 |
|
|
530 |
/** |
/** |
531 |
* set in one thread causes get in another thread to retrieve value |
* run in one thread causes get in another thread to retrieve value |
532 |
*/ |
*/ |
533 |
public void testGet1() throws InterruptedException { |
public void testGetRun() { |
534 |
final FutureTask ft = |
final CountDownLatch pleaseRun = new CountDownLatch(2); |
535 |
new FutureTask(new CheckedCallable<Object>() { |
|
536 |
public Object realCall() throws InterruptedException { |
final PublicFutureTask task = |
537 |
return Boolean.TRUE; |
new PublicFutureTask(new CheckedCallable<Object>() { |
538 |
|
public Object realCall() { |
539 |
|
return two; |
540 |
}}); |
}}); |
541 |
Thread t = new Thread(new CheckedRunnable() { |
|
542 |
|
Thread t1 = newStartedThread(new CheckedRunnable() { |
543 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
544 |
assertSame(Boolean.TRUE, ft.get()); |
pleaseRun.countDown(); |
545 |
|
assertSame(two, task.get()); |
546 |
}}); |
}}); |
547 |
|
|
548 |
assertFalse(ft.isDone()); |
Thread t2 = newStartedThread(new CheckedRunnable() { |
549 |
assertFalse(ft.isCancelled()); |
public void realRun() throws Exception { |
550 |
t.start(); |
pleaseRun.countDown(); |
551 |
Thread.sleep(SHORT_DELAY_MS); |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
552 |
ft.run(); |
}}); |
553 |
t.join(); |
|
554 |
assertTrue(ft.isDone()); |
await(pleaseRun); |
555 |
assertFalse(ft.isCancelled()); |
checkNotDone(task); |
556 |
|
assertTrue(t1.isAlive()); |
557 |
|
assertTrue(t2.isAlive()); |
558 |
|
task.run(); |
559 |
|
checkCompletedNormally(task, two); |
560 |
|
assertEquals(1, task.runCount()); |
561 |
|
assertEquals(1, task.setCount()); |
562 |
|
assertEquals(0, task.setExceptionCount()); |
563 |
|
awaitTermination(t1); |
564 |
|
awaitTermination(t2); |
565 |
|
tryToConfuseDoneTask(task); |
566 |
|
checkCompletedNormally(task, two); |
567 |
} |
} |
568 |
|
|
569 |
/** |
/** |
570 |
* 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 |
571 |
*/ |
*/ |
572 |
public void testTimedGet1() throws InterruptedException { |
public void testGetSet() { |
573 |
final FutureTask ft = |
final CountDownLatch pleaseSet = new CountDownLatch(2); |
574 |
new FutureTask(new CheckedCallable<Object>() { |
|
575 |
|
final PublicFutureTask task = |
576 |
|
new PublicFutureTask(new CheckedCallable<Object>() { |
577 |
public Object realCall() throws InterruptedException { |
public Object realCall() throws InterruptedException { |
578 |
return Boolean.TRUE; |
return two; |
579 |
}}); |
}}); |
580 |
Thread t = new Thread(new CheckedRunnable() { |
|
581 |
|
Thread t1 = newStartedThread(new CheckedRunnable() { |
582 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
583 |
assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS)); |
pleaseSet.countDown(); |
584 |
|
assertSame(two, task.get()); |
585 |
}}); |
}}); |
586 |
|
|
587 |
assertFalse(ft.isDone()); |
Thread t2 = newStartedThread(new CheckedRunnable() { |
588 |
assertFalse(ft.isCancelled()); |
public void realRun() throws Exception { |
589 |
t.start(); |
pleaseSet.countDown(); |
590 |
Thread.sleep(SHORT_DELAY_MS); |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
591 |
ft.run(); |
}}); |
592 |
t.join(); |
|
593 |
assertTrue(ft.isDone()); |
await(pleaseSet); |
594 |
assertFalse(ft.isCancelled()); |
checkNotDone(task); |
595 |
|
assertTrue(t1.isAlive()); |
596 |
|
assertTrue(t2.isAlive()); |
597 |
|
task.set(two); |
598 |
|
assertEquals(0, task.runCount()); |
599 |
|
assertEquals(1, task.setCount()); |
600 |
|
assertEquals(0, task.setExceptionCount()); |
601 |
|
tryToConfuseDoneTask(task); |
602 |
|
checkCompletedNormally(task, two); |
603 |
|
awaitTermination(t1); |
604 |
|
awaitTermination(t2); |
605 |
} |
} |
606 |
|
|
607 |
/** |
/** |
608 |
* Cancelling a task causes timed get in another thread to throw |
* Cancelling a task causes timed get in another thread to throw |
609 |
* CancellationException |
* CancellationException |
610 |
*/ |
*/ |
611 |
public void testTimedGet_Cancellation() throws InterruptedException { |
public void testTimedGet_Cancellation() { |
612 |
final FutureTask ft = |
testTimedGet_Cancellation(false); |
613 |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
} |
614 |
|
public void testTimedGet_Cancellation_interrupt() { |
615 |
|
testTimedGet_Cancellation(true); |
616 |
|
} |
617 |
|
public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) { |
618 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(3); |
619 |
|
final CountDownLatch cancelled = new CountDownLatch(1); |
620 |
|
final Callable<Object> callable = |
621 |
|
new CheckedCallable<Object>() { |
622 |
public Object realCall() throws InterruptedException { |
public Object realCall() throws InterruptedException { |
623 |
Thread.sleep(SMALL_DELAY_MS); |
pleaseCancel.countDown(); |
624 |
return Boolean.TRUE; |
if (mayInterruptIfRunning) { |
625 |
}}); |
try { |
626 |
|
delay(2*LONG_DELAY_MS); |
627 |
|
} catch (InterruptedException success) {} |
628 |
|
} else { |
629 |
|
await(cancelled); |
630 |
|
} |
631 |
|
return two; |
632 |
|
}}; |
633 |
|
final PublicFutureTask task = new PublicFutureTask(callable); |
634 |
|
|
635 |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
636 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
637 |
ft.get(MEDIUM_DELAY_MS, MILLISECONDS); |
pleaseCancel.countDown(); |
638 |
|
task.get(); |
639 |
}}; |
}}; |
640 |
Thread t2 = new Thread(ft); |
Thread t2 = new ThreadShouldThrow(CancellationException.class) { |
|
t1.start(); |
|
|
t2.start(); |
|
|
Thread.sleep(SHORT_DELAY_MS); |
|
|
ft.cancel(true); |
|
|
t1.join(); |
|
|
t2.join(); |
|
|
} |
|
|
|
|
|
/** |
|
|
* Cancelling a task causes get in another thread to throw |
|
|
* CancellationException |
|
|
*/ |
|
|
public void testGet_Cancellation() throws InterruptedException { |
|
|
final FutureTask ft = |
|
|
new FutureTask(new CheckedInterruptedCallable<Object>() { |
|
|
public Object realCall() throws InterruptedException { |
|
|
Thread.sleep(SMALL_DELAY_MS); |
|
|
return Boolean.TRUE; |
|
|
}}); |
|
|
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
|
641 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
642 |
ft.get(); |
pleaseCancel.countDown(); |
643 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
644 |
}}; |
}}; |
|
|
|
|
Thread t2 = new Thread(ft); |
|
645 |
t1.start(); |
t1.start(); |
646 |
t2.start(); |
t2.start(); |
647 |
Thread.sleep(SHORT_DELAY_MS); |
Thread t3 = newStartedThread(task); |
648 |
ft.cancel(true); |
await(pleaseCancel); |
649 |
t1.join(); |
checkIsRunning(task); |
650 |
t2.join(); |
task.cancel(mayInterruptIfRunning); |
651 |
|
checkCancelled(task); |
652 |
|
awaitTermination(t1); |
653 |
|
awaitTermination(t2); |
654 |
|
cancelled.countDown(); |
655 |
|
awaitTermination(t3); |
656 |
|
assertEquals(1, task.runCount()); |
657 |
|
assertEquals(1, task.setCount()); |
658 |
|
assertEquals(0, task.setExceptionCount()); |
659 |
|
tryToConfuseDoneTask(task); |
660 |
|
checkCancelled(task); |
661 |
} |
} |
662 |
|
|
|
|
|
663 |
/** |
/** |
664 |
* A runtime exception in task causes get to throw ExecutionException |
* A runtime exception in task causes get to throw ExecutionException |
665 |
*/ |
*/ |
666 |
public void testGet_ExecutionException() throws InterruptedException { |
public void testGet_ExecutionException() throws InterruptedException { |
667 |
final FutureTask ft = new FutureTask(new Callable() { |
final ArithmeticException e = new ArithmeticException(); |
668 |
|
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
669 |
public Object call() { |
public Object call() { |
670 |
return 5/0; |
throw e; |
671 |
}}); |
}}); |
672 |
|
|
673 |
ft.run(); |
task.run(); |
674 |
|
assertEquals(1, task.runCount()); |
675 |
|
assertEquals(0, task.setCount()); |
676 |
|
assertEquals(1, task.setExceptionCount()); |
677 |
try { |
try { |
678 |
ft.get(); |
task.get(); |
679 |
shouldThrow(); |
shouldThrow(); |
680 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
681 |
assertTrue(success.getCause() instanceof ArithmeticException); |
assertSame(e, success.getCause()); |
682 |
|
tryToConfuseDoneTask(task); |
683 |
|
checkCompletedAbnormally(task, success.getCause()); |
684 |
} |
} |
685 |
} |
} |
686 |
|
|
688 |
* A runtime exception in task causes timed get to throw ExecutionException |
* A runtime exception in task causes timed get to throw ExecutionException |
689 |
*/ |
*/ |
690 |
public void testTimedGet_ExecutionException2() throws Exception { |
public void testTimedGet_ExecutionException2() throws Exception { |
691 |
final FutureTask ft = new FutureTask(new Callable() { |
final ArithmeticException e = new ArithmeticException(); |
692 |
|
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
693 |
public Object call() { |
public Object call() { |
694 |
return 5/0; |
throw e; |
695 |
}}); |
}}); |
696 |
|
|
697 |
ft.run(); |
task.run(); |
698 |
try { |
try { |
699 |
ft.get(SHORT_DELAY_MS, MILLISECONDS); |
task.get(LONG_DELAY_MS, MILLISECONDS); |
700 |
shouldThrow(); |
shouldThrow(); |
701 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
702 |
assertTrue(success.getCause() instanceof ArithmeticException); |
assertSame(e, success.getCause()); |
703 |
|
tryToConfuseDoneTask(task); |
704 |
|
checkCompletedAbnormally(task, success.getCause()); |
705 |
} |
} |
706 |
} |
} |
707 |
|
|
|
|
|
708 |
/** |
/** |
709 |
* Interrupting a waiting get causes it to throw InterruptedException |
* get is interruptible |
710 |
*/ |
*/ |
711 |
public void testGet_InterruptedException() throws InterruptedException { |
public void testGet_interruptible() { |
712 |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
713 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
final FutureTask task = new FutureTask(new NoOpCallable()); |
714 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
715 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
716 |
ft.get(); |
Thread.currentThread().interrupt(); |
717 |
|
try { |
718 |
|
task.get(); |
719 |
|
shouldThrow(); |
720 |
|
} catch (InterruptedException success) {} |
721 |
|
assertFalse(Thread.interrupted()); |
722 |
|
|
723 |
|
pleaseInterrupt.countDown(); |
724 |
|
try { |
725 |
|
task.get(); |
726 |
|
shouldThrow(); |
727 |
|
} catch (InterruptedException success) {} |
728 |
|
assertFalse(Thread.interrupted()); |
729 |
}}); |
}}); |
730 |
|
|
731 |
t.start(); |
await(pleaseInterrupt); |
|
Thread.sleep(SHORT_DELAY_MS); |
|
732 |
t.interrupt(); |
t.interrupt(); |
733 |
t.join(); |
awaitTermination(t); |
734 |
|
checkNotDone(task); |
735 |
} |
} |
736 |
|
|
737 |
/** |
/** |
738 |
* Interrupting a waiting timed get causes it to throw InterruptedException |
* timed get is interruptible |
739 |
*/ |
*/ |
740 |
public void testTimedGet_InterruptedException2() throws InterruptedException { |
public void testTimedGet_interruptible() { |
741 |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
742 |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
final FutureTask task = new FutureTask(new NoOpCallable()); |
743 |
|
Thread t = newStartedThread(new CheckedRunnable() { |
744 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
745 |
ft.get(LONG_DELAY_MS,MILLISECONDS); |
Thread.currentThread().interrupt(); |
746 |
|
try { |
747 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
748 |
|
shouldThrow(); |
749 |
|
} catch (InterruptedException success) {} |
750 |
|
assertFalse(Thread.interrupted()); |
751 |
|
|
752 |
|
pleaseInterrupt.countDown(); |
753 |
|
try { |
754 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
755 |
|
shouldThrow(); |
756 |
|
} catch (InterruptedException success) {} |
757 |
|
assertFalse(Thread.interrupted()); |
758 |
}}); |
}}); |
759 |
|
|
760 |
t.start(); |
await(pleaseInterrupt); |
|
Thread.sleep(SHORT_DELAY_MS); |
|
761 |
t.interrupt(); |
t.interrupt(); |
762 |
t.join(); |
awaitTermination(t); |
763 |
|
checkNotDone(task); |
764 |
} |
} |
765 |
|
|
766 |
/** |
/** |
767 |
* A timed out timed get throws TimeoutException |
* A timed out timed get throws TimeoutException |
768 |
*/ |
*/ |
769 |
public void testGet_TimeoutException() throws Exception { |
public void testGet_TimeoutException() throws Exception { |
770 |
|
FutureTask task = new FutureTask(new NoOpCallable()); |
771 |
|
long startTime = System.nanoTime(); |
772 |
|
try { |
773 |
|
task.get(timeoutMillis(), MILLISECONDS); |
774 |
|
shouldThrow(); |
775 |
|
} catch (TimeoutException success) { |
776 |
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
777 |
|
} |
778 |
|
} |
779 |
|
|
780 |
|
/** |
781 |
|
* timed get with null TimeUnit throws NullPointerException |
782 |
|
*/ |
783 |
|
public void testGet_NullTimeUnit() throws Exception { |
784 |
|
FutureTask task = new FutureTask(new NoOpCallable()); |
785 |
|
long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE }; |
786 |
|
|
787 |
|
for (long timeout : timeouts) { |
788 |
|
try { |
789 |
|
task.get(timeout, null); |
790 |
|
shouldThrow(); |
791 |
|
} catch (NullPointerException success) {} |
792 |
|
} |
793 |
|
|
794 |
|
task.run(); |
795 |
|
|
796 |
|
for (long timeout : timeouts) { |
797 |
try { |
try { |
798 |
FutureTask ft = new FutureTask(new NoOpCallable()); |
task.get(timeout, null); |
|
ft.get(1,MILLISECONDS); |
|
799 |
shouldThrow(); |
shouldThrow(); |
800 |
} catch (TimeoutException success) {} |
} catch (NullPointerException success) {} |
801 |
|
} |
802 |
} |
} |
803 |
|
|
804 |
} |
} |