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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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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.ExecutorService; |
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import java.util.concurrent.Executors; |
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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.*; |
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import java.util.*; |
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|
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public class FutureTaskTest extends JSR166TestCase { |
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return new TestSuite(FutureTaskTest.class); |
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} |
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|
32 |
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void checkIsDone(Future<?> f) { |
33 |
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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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|
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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()); |
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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(); |
87 |
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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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|
102 |
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try { |
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assertSame(expected, f.get()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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try { |
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assertSame(expected, f.get(5L, SECONDS)); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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} |
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|
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void checkCancelled(Future<?> f) { |
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checkIsDone(f); |
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assertTrue(f.isCancelled()); |
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|
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try { |
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f.get(); |
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shouldThrow(); |
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} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
119 |
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|
120 |
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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()); |
138 |
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|
139 |
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try { |
140 |
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f.get(); |
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shouldThrow(); |
142 |
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} catch (ExecutionException success) { |
143 |
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assertSame(t, success.getCause()); |
144 |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
145 |
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|
146 |
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try { |
147 |
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f.get(5L, SECONDS); |
148 |
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shouldThrow(); |
149 |
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} catch (ExecutionException success) { |
150 |
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assertSame(t, success.getCause()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
152 |
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} |
153 |
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|
154 |
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/** |
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* Subclass to expose protected methods |
156 |
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*/ |
157 |
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static class PublicFutureTask extends FutureTask { |
158 |
< |
public PublicFutureTask(Callable r) { super(r); } |
159 |
< |
public boolean runAndReset() { return super.runAndReset(); } |
160 |
< |
public void set(Object x) { super.set(x); } |
161 |
< |
public void setException(Throwable t) { super.setException(t); } |
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> |
private final AtomicInteger runCount; |
159 |
> |
private final AtomicInteger doneCount = new AtomicInteger(0); |
160 |
> |
private final AtomicInteger runAndResetCount = new AtomicInteger(0); |
161 |
> |
private final AtomicInteger setCount = new AtomicInteger(0); |
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> |
private final AtomicInteger setExceptionCount = new AtomicInteger(0); |
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public int runCount() { return runCount.get(); } |
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public int doneCount() { return doneCount.get(); } |
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public int runAndResetCount() { return runAndResetCount.get(); } |
166 |
> |
public int setCount() { return setCount.get(); } |
167 |
> |
public int setExceptionCount() { return setExceptionCount.get(); } |
168 |
> |
|
169 |
> |
PublicFutureTask(Runnable runnable) { |
170 |
> |
this(runnable, seven); |
171 |
> |
} |
172 |
> |
PublicFutureTask(Runnable runnable, Object result) { |
173 |
> |
this(runnable, result, new AtomicInteger(0)); |
174 |
> |
} |
175 |
> |
private PublicFutureTask(final Runnable runnable, Object result, |
176 |
> |
final AtomicInteger runCount) { |
177 |
> |
super(new Runnable() { |
178 |
> |
public void run() { |
179 |
> |
runCount.getAndIncrement(); |
180 |
> |
runnable.run(); |
181 |
> |
}}, result); |
182 |
> |
this.runCount = runCount; |
183 |
> |
} |
184 |
> |
PublicFutureTask(Callable callable) { |
185 |
> |
this(callable, new AtomicInteger(0)); |
186 |
> |
} |
187 |
> |
private PublicFutureTask(final Callable callable, |
188 |
> |
final AtomicInteger runCount) { |
189 |
> |
super(new Callable() { |
190 |
> |
public Object call() throws Exception { |
191 |
> |
runCount.getAndIncrement(); |
192 |
> |
return callable.call(); |
193 |
> |
}}); |
194 |
> |
this.runCount = runCount; |
195 |
> |
} |
196 |
> |
@Override public void done() { |
197 |
> |
assertTrue(isDone()); |
198 |
> |
doneCount.incrementAndGet(); |
199 |
> |
super.done(); |
200 |
> |
} |
201 |
> |
@Override public boolean runAndReset() { |
202 |
> |
runAndResetCount.incrementAndGet(); |
203 |
> |
return super.runAndReset(); |
204 |
> |
} |
205 |
> |
@Override public void set(Object x) { |
206 |
> |
setCount.incrementAndGet(); |
207 |
> |
super.set(x); |
208 |
> |
} |
209 |
> |
@Override public void setException(Throwable t) { |
210 |
> |
setExceptionCount.incrementAndGet(); |
211 |
> |
super.setException(t); |
212 |
> |
} |
213 |
> |
} |
214 |
> |
|
215 |
> |
class Counter extends CheckedRunnable { |
216 |
> |
final AtomicInteger count = new AtomicInteger(0); |
217 |
> |
public int get() { return count.get(); } |
218 |
> |
public void realRun() { |
219 |
> |
count.getAndIncrement(); |
220 |
> |
} |
221 |
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} |
222 |
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|
223 |
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/** |
224 |
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* Creating a future with a null callable throws NPE |
224 |
> |
* creating a future with a null callable throws NullPointerException |
225 |
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*/ |
226 |
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public void testConstructor() { |
227 |
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try { |
228 |
< |
FutureTask task = new FutureTask(null); |
228 |
> |
new FutureTask(null); |
229 |
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shouldThrow(); |
230 |
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} catch (NullPointerException success) {} |
231 |
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} |
232 |
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|
233 |
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/** |
234 |
< |
* creating a future with null runnable fails |
234 |
> |
* creating a future with null runnable throws NullPointerException |
235 |
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*/ |
236 |
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public void testConstructor2() { |
237 |
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try { |
238 |
< |
FutureTask task = new FutureTask(null, Boolean.TRUE); |
238 |
> |
new FutureTask(null, Boolean.TRUE); |
239 |
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shouldThrow(); |
240 |
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} catch (NullPointerException success) {} |
241 |
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} |
244 |
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* isDone is true when a task completes |
245 |
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*/ |
246 |
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public void testIsDone() { |
247 |
< |
FutureTask task = new FutureTask(new NoOpCallable()); |
247 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
248 |
> |
assertFalse(task.isDone()); |
249 |
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task.run(); |
250 |
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assertTrue(task.isDone()); |
251 |
< |
assertFalse(task.isCancelled()); |
251 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
252 |
> |
assertEquals(1, task.runCount()); |
253 |
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} |
254 |
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|
255 |
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/** |
257 |
|
*/ |
258 |
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public void testRunAndReset() { |
259 |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
260 |
< |
assertTrue(task.runAndReset()); |
261 |
< |
assertFalse(task.isDone()); |
260 |
> |
for (int i = 0; i < 3; i++) { |
261 |
> |
assertTrue(task.runAndReset()); |
262 |
> |
checkNotDone(task); |
263 |
> |
assertEquals(i+1, task.runCount()); |
264 |
> |
assertEquals(i+1, task.runAndResetCount()); |
265 |
> |
assertEquals(0, task.setCount()); |
266 |
> |
assertEquals(0, task.setExceptionCount()); |
267 |
> |
} |
268 |
|
} |
269 |
|
|
270 |
|
/** |
271 |
|
* runAndReset after cancellation fails |
272 |
|
*/ |
273 |
< |
public void testResetAfterCancel() { |
274 |
< |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
275 |
< |
assertTrue(task.cancel(false)); |
276 |
< |
assertFalse(task.runAndReset()); |
277 |
< |
assertTrue(task.isDone()); |
278 |
< |
assertTrue(task.isCancelled()); |
273 |
> |
public void testRunAndResetAfterCancel() { |
274 |
> |
for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
275 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
276 |
> |
assertTrue(task.cancel(mayInterruptIfRunning)); |
277 |
> |
for (int i = 0; i < 3; i++) { |
278 |
> |
assertFalse(task.runAndReset()); |
279 |
> |
assertEquals(0, task.runCount()); |
280 |
> |
assertEquals(i+1, task.runAndResetCount()); |
281 |
> |
assertEquals(0, task.setCount()); |
282 |
> |
assertEquals(0, task.setExceptionCount()); |
283 |
> |
} |
284 |
> |
tryToConfuseDoneTask(task); |
285 |
> |
checkCancelled(task); |
286 |
> |
} |
287 |
|
} |
288 |
|
|
83 |
– |
|
84 |
– |
|
289 |
|
/** |
290 |
|
* setting value causes get to return it |
291 |
|
*/ |
292 |
|
public void testSet() throws Exception { |
293 |
|
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
294 |
|
task.set(one); |
295 |
< |
assertSame(task.get(), one); |
295 |
> |
for (int i = 0; i < 3; i++) { |
296 |
> |
assertSame(one, task.get()); |
297 |
> |
assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS)); |
298 |
> |
assertEquals(1, task.setCount()); |
299 |
> |
} |
300 |
> |
tryToConfuseDoneTask(task); |
301 |
> |
checkCompletedNormally(task, one); |
302 |
> |
assertEquals(0, task.runCount()); |
303 |
|
} |
304 |
|
|
305 |
|
/** |
306 |
|
* setException causes get to throw ExecutionException |
307 |
|
*/ |
308 |
< |
public void testSetException() throws Exception { |
308 |
> |
public void testSetException_get() throws Exception { |
309 |
|
Exception nse = new NoSuchElementException(); |
310 |
|
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
311 |
|
task.setException(nse); |
312 |
+ |
|
313 |
+ |
try { |
314 |
+ |
task.get(); |
315 |
+ |
shouldThrow(); |
316 |
+ |
} catch (ExecutionException success) { |
317 |
+ |
assertSame(nse, success.getCause()); |
318 |
+ |
checkCompletedAbnormally(task, nse); |
319 |
+ |
} |
320 |
+ |
|
321 |
|
try { |
322 |
< |
Object x = task.get(); |
322 |
> |
task.get(LONG_DELAY_MS, MILLISECONDS); |
323 |
|
shouldThrow(); |
324 |
|
} catch (ExecutionException success) { |
325 |
< |
assertSame(success.getCause(), nse); |
325 |
> |
assertSame(nse, success.getCause()); |
326 |
> |
checkCompletedAbnormally(task, nse); |
327 |
|
} |
328 |
+ |
|
329 |
+ |
assertEquals(1, task.setExceptionCount()); |
330 |
+ |
assertEquals(0, task.setCount()); |
331 |
+ |
tryToConfuseDoneTask(task); |
332 |
+ |
checkCompletedAbnormally(task, nse); |
333 |
+ |
assertEquals(0, task.runCount()); |
334 |
|
} |
335 |
|
|
336 |
|
/** |
337 |
< |
* Cancelling before running succeeds |
337 |
> |
* cancel(false) before run succeeds |
338 |
|
*/ |
339 |
|
public void testCancelBeforeRun() { |
340 |
< |
FutureTask task = new FutureTask(new NoOpCallable()); |
340 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
341 |
|
assertTrue(task.cancel(false)); |
342 |
|
task.run(); |
343 |
< |
assertTrue(task.isDone()); |
343 |
> |
assertEquals(0, task.runCount()); |
344 |
> |
assertEquals(0, task.setCount()); |
345 |
> |
assertEquals(0, task.setExceptionCount()); |
346 |
|
assertTrue(task.isCancelled()); |
347 |
+ |
assertTrue(task.isDone()); |
348 |
+ |
tryToConfuseDoneTask(task); |
349 |
+ |
assertEquals(0, task.runCount()); |
350 |
+ |
checkCancelled(task); |
351 |
|
} |
352 |
|
|
353 |
|
/** |
354 |
< |
* Cancel(true) before run succeeds |
354 |
> |
* cancel(true) before run succeeds |
355 |
|
*/ |
356 |
|
public void testCancelBeforeRun2() { |
357 |
< |
FutureTask task = new FutureTask(new NoOpCallable()); |
357 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
358 |
|
assertTrue(task.cancel(true)); |
359 |
|
task.run(); |
360 |
< |
assertTrue(task.isDone()); |
360 |
> |
assertEquals(0, task.runCount()); |
361 |
> |
assertEquals(0, task.setCount()); |
362 |
> |
assertEquals(0, task.setExceptionCount()); |
363 |
|
assertTrue(task.isCancelled()); |
364 |
+ |
assertTrue(task.isDone()); |
365 |
+ |
tryToConfuseDoneTask(task); |
366 |
+ |
assertEquals(0, task.runCount()); |
367 |
+ |
checkCancelled(task); |
368 |
|
} |
369 |
|
|
370 |
|
/** |
371 |
< |
* cancel of a completed task fails |
371 |
> |
* cancel(false) of a completed task fails |
372 |
|
*/ |
373 |
|
public void testCancelAfterRun() { |
374 |
< |
FutureTask task = new FutureTask(new NoOpCallable()); |
374 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
375 |
|
task.run(); |
376 |
|
assertFalse(task.cancel(false)); |
377 |
< |
assertTrue(task.isDone()); |
378 |
< |
assertFalse(task.isCancelled()); |
377 |
> |
assertEquals(1, task.runCount()); |
378 |
> |
assertEquals(1, task.setCount()); |
379 |
> |
assertEquals(0, task.setExceptionCount()); |
380 |
> |
tryToConfuseDoneTask(task); |
381 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
382 |
> |
assertEquals(1, task.runCount()); |
383 |
|
} |
384 |
|
|
385 |
|
/** |
386 |
< |
* cancel(true) interrupts a running task |
386 |
> |
* cancel(true) of a completed task fails |
387 |
|
*/ |
388 |
< |
public void testCancelInterrupt() throws InterruptedException { |
389 |
< |
final FutureTask task = |
390 |
< |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
391 |
< |
public Object realCall() throws InterruptedException { |
392 |
< |
Thread.sleep(SMALL_DELAY_MS); |
393 |
< |
return Boolean.TRUE; |
388 |
> |
public void testCancelAfterRun2() { |
389 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
390 |
> |
task.run(); |
391 |
> |
assertFalse(task.cancel(true)); |
392 |
> |
assertEquals(1, task.runCount()); |
393 |
> |
assertEquals(1, task.setCount()); |
394 |
> |
assertEquals(0, task.setExceptionCount()); |
395 |
> |
tryToConfuseDoneTask(task); |
396 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
397 |
> |
assertEquals(1, task.runCount()); |
398 |
> |
} |
399 |
> |
|
400 |
> |
/** |
401 |
> |
* cancel(true) interrupts a running task that subsequently succeeds |
402 |
> |
*/ |
403 |
> |
public void testCancelInterrupt() { |
404 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
405 |
> |
final PublicFutureTask task = |
406 |
> |
new PublicFutureTask(new CheckedRunnable() { |
407 |
> |
public void realRun() { |
408 |
> |
pleaseCancel.countDown(); |
409 |
> |
try { |
410 |
> |
delay(LONG_DELAY_MS); |
411 |
> |
shouldThrow(); |
412 |
> |
} catch (InterruptedException success) {} |
413 |
|
}}); |
414 |
|
|
415 |
< |
Thread t = new Thread(task); |
416 |
< |
t.start(); |
155 |
< |
Thread.sleep(SHORT_DELAY_MS); |
415 |
> |
Thread t = newStartedThread(task); |
416 |
> |
await(pleaseCancel); |
417 |
|
assertTrue(task.cancel(true)); |
157 |
– |
t.join(); |
158 |
– |
assertTrue(task.isDone()); |
418 |
|
assertTrue(task.isCancelled()); |
419 |
+ |
assertTrue(task.isDone()); |
420 |
+ |
awaitTermination(t); |
421 |
+ |
assertEquals(1, task.runCount()); |
422 |
+ |
assertEquals(1, task.setCount()); |
423 |
+ |
assertEquals(0, task.setExceptionCount()); |
424 |
+ |
tryToConfuseDoneTask(task); |
425 |
+ |
checkCancelled(task); |
426 |
|
} |
427 |
|
|
162 |
– |
|
428 |
|
/** |
429 |
< |
* cancel(false) does not interrupt a running task |
430 |
< |
*/ |
431 |
< |
public void testCancelNoInterrupt() throws InterruptedException { |
432 |
< |
final FutureTask task = |
433 |
< |
new FutureTask(new CheckedCallable<Object>() { |
434 |
< |
public Object realCall() throws InterruptedException { |
435 |
< |
Thread.sleep(MEDIUM_DELAY_MS); |
436 |
< |
return Boolean.TRUE; |
429 |
> |
* cancel(true) tries to interrupt a running task, but |
430 |
> |
* Thread.interrupt throws (simulating a restrictive security |
431 |
> |
* manager) |
432 |
> |
*/ |
433 |
> |
public void testCancelInterrupt_ThrowsSecurityException() { |
434 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
435 |
> |
final CountDownLatch cancelled = new CountDownLatch(1); |
436 |
> |
final PublicFutureTask task = |
437 |
> |
new PublicFutureTask(new CheckedRunnable() { |
438 |
> |
public void realRun() { |
439 |
> |
pleaseCancel.countDown(); |
440 |
> |
await(cancelled); |
441 |
> |
assertFalse(Thread.interrupted()); |
442 |
|
}}); |
443 |
|
|
444 |
< |
Thread t = new Thread(task); |
444 |
> |
final Thread t = new Thread(task) { |
445 |
> |
// Simulate a restrictive security manager. |
446 |
> |
@Override public void interrupt() { |
447 |
> |
throw new SecurityException(); |
448 |
> |
}}; |
449 |
> |
t.setDaemon(true); |
450 |
|
t.start(); |
451 |
< |
Thread.sleep(SHORT_DELAY_MS); |
452 |
< |
assertTrue(task.cancel(false)); |
453 |
< |
t.join(); |
451 |
> |
|
452 |
> |
await(pleaseCancel); |
453 |
> |
try { |
454 |
> |
task.cancel(true); |
455 |
> |
shouldThrow(); |
456 |
> |
} catch (SecurityException expected) {} |
457 |
> |
|
458 |
> |
// We failed to deliver the interrupt, but the world retains |
459 |
> |
// its sanity, as if we had done task.cancel(false) |
460 |
> |
assertTrue(task.isCancelled()); |
461 |
|
assertTrue(task.isDone()); |
462 |
+ |
assertEquals(1, task.runCount()); |
463 |
+ |
assertEquals(1, task.doneCount()); |
464 |
+ |
assertEquals(0, task.setCount()); |
465 |
+ |
assertEquals(0, task.setExceptionCount()); |
466 |
+ |
cancelled.countDown(); |
467 |
+ |
awaitTermination(t); |
468 |
+ |
assertEquals(1, task.setCount()); |
469 |
+ |
assertEquals(0, task.setExceptionCount()); |
470 |
+ |
tryToConfuseDoneTask(task); |
471 |
+ |
checkCancelled(task); |
472 |
+ |
} |
473 |
+ |
|
474 |
+ |
/** |
475 |
+ |
* cancel(true) interrupts a running task that subsequently throws |
476 |
+ |
*/ |
477 |
+ |
public void testCancelInterrupt_taskFails() { |
478 |
+ |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
479 |
+ |
final PublicFutureTask task = |
480 |
+ |
new PublicFutureTask(new Runnable() { |
481 |
+ |
public void run() { |
482 |
+ |
try { |
483 |
+ |
pleaseCancel.countDown(); |
484 |
+ |
delay(LONG_DELAY_MS); |
485 |
+ |
threadShouldThrow(); |
486 |
+ |
} catch (InterruptedException success) { |
487 |
+ |
} catch (Throwable t) { threadUnexpectedException(t); } |
488 |
+ |
throw new RuntimeException(); |
489 |
+ |
}}); |
490 |
+ |
|
491 |
+ |
Thread t = newStartedThread(task); |
492 |
+ |
await(pleaseCancel); |
493 |
+ |
assertTrue(task.cancel(true)); |
494 |
|
assertTrue(task.isCancelled()); |
495 |
+ |
awaitTermination(t); |
496 |
+ |
assertEquals(1, task.runCount()); |
497 |
+ |
assertEquals(0, task.setCount()); |
498 |
+ |
assertEquals(1, task.setExceptionCount()); |
499 |
+ |
tryToConfuseDoneTask(task); |
500 |
+ |
checkCancelled(task); |
501 |
|
} |
502 |
|
|
503 |
|
/** |
504 |
< |
* set in one thread causes get in another thread to retrieve value |
504 |
> |
* cancel(false) does not interrupt a running task |
505 |
|
*/ |
506 |
< |
public void testGet1() throws InterruptedException { |
507 |
< |
final FutureTask ft = |
508 |
< |
new FutureTask(new CheckedCallable<Object>() { |
509 |
< |
public Object realCall() throws InterruptedException { |
506 |
> |
public void testCancelNoInterrupt() { |
507 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
508 |
> |
final CountDownLatch cancelled = new CountDownLatch(1); |
509 |
> |
final PublicFutureTask task = |
510 |
> |
new PublicFutureTask(new CheckedCallable<Boolean>() { |
511 |
> |
public Boolean realCall() { |
512 |
> |
pleaseCancel.countDown(); |
513 |
> |
await(cancelled); |
514 |
> |
assertFalse(Thread.interrupted()); |
515 |
|
return Boolean.TRUE; |
516 |
|
}}); |
192 |
– |
Thread t = new Thread(new CheckedRunnable() { |
193 |
– |
public void realRun() throws Exception { |
194 |
– |
assertSame(Boolean.TRUE, ft.get()); |
195 |
– |
}}); |
517 |
|
|
518 |
< |
assertFalse(ft.isDone()); |
519 |
< |
assertFalse(ft.isCancelled()); |
520 |
< |
t.start(); |
521 |
< |
Thread.sleep(SHORT_DELAY_MS); |
522 |
< |
ft.run(); |
523 |
< |
t.join(); |
524 |
< |
assertTrue(ft.isDone()); |
525 |
< |
assertFalse(ft.isCancelled()); |
518 |
> |
Thread t = newStartedThread(task); |
519 |
> |
await(pleaseCancel); |
520 |
> |
assertTrue(task.cancel(false)); |
521 |
> |
assertTrue(task.isCancelled()); |
522 |
> |
cancelled.countDown(); |
523 |
> |
awaitTermination(t); |
524 |
> |
assertEquals(1, task.runCount()); |
525 |
> |
assertEquals(1, task.setCount()); |
526 |
> |
assertEquals(0, task.setExceptionCount()); |
527 |
> |
tryToConfuseDoneTask(task); |
528 |
> |
checkCancelled(task); |
529 |
|
} |
530 |
|
|
531 |
|
/** |
532 |
< |
* set in one thread causes timed get in another thread to retrieve value |
532 |
> |
* run in one thread causes get in another thread to retrieve value |
533 |
|
*/ |
534 |
< |
public void testTimedGet1() throws InterruptedException { |
535 |
< |
final FutureTask ft = |
536 |
< |
new FutureTask(new CheckedCallable<Object>() { |
537 |
< |
public Object realCall() throws InterruptedException { |
538 |
< |
return Boolean.TRUE; |
534 |
> |
public void testGetRun() { |
535 |
> |
final CountDownLatch pleaseRun = new CountDownLatch(2); |
536 |
> |
|
537 |
> |
final PublicFutureTask task = |
538 |
> |
new PublicFutureTask(new CheckedCallable<Object>() { |
539 |
> |
public Object realCall() { |
540 |
> |
return two; |
541 |
|
}}); |
542 |
< |
Thread t = new Thread(new CheckedRunnable() { |
542 |
> |
|
543 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
544 |
|
public void realRun() throws Exception { |
545 |
< |
assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS)); |
545 |
> |
pleaseRun.countDown(); |
546 |
> |
assertSame(two, task.get()); |
547 |
|
}}); |
548 |
|
|
549 |
< |
assertFalse(ft.isDone()); |
550 |
< |
assertFalse(ft.isCancelled()); |
551 |
< |
t.start(); |
552 |
< |
Thread.sleep(SHORT_DELAY_MS); |
553 |
< |
ft.run(); |
554 |
< |
t.join(); |
555 |
< |
assertTrue(ft.isDone()); |
556 |
< |
assertFalse(ft.isCancelled()); |
549 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
550 |
> |
public void realRun() throws Exception { |
551 |
> |
pleaseRun.countDown(); |
552 |
> |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
553 |
> |
}}); |
554 |
> |
|
555 |
> |
await(pleaseRun); |
556 |
> |
checkNotDone(task); |
557 |
> |
assertTrue(t1.isAlive()); |
558 |
> |
assertTrue(t2.isAlive()); |
559 |
> |
task.run(); |
560 |
> |
checkCompletedNormally(task, two); |
561 |
> |
assertEquals(1, task.runCount()); |
562 |
> |
assertEquals(1, task.setCount()); |
563 |
> |
assertEquals(0, task.setExceptionCount()); |
564 |
> |
awaitTermination(t1); |
565 |
> |
awaitTermination(t2); |
566 |
> |
tryToConfuseDoneTask(task); |
567 |
> |
checkCompletedNormally(task, two); |
568 |
|
} |
569 |
|
|
570 |
|
/** |
571 |
< |
* Cancelling a task causes timed get in another thread to throw CancellationException |
571 |
> |
* set in one thread causes get in another thread to retrieve value |
572 |
|
*/ |
573 |
< |
public void testTimedGet_Cancellation() throws InterruptedException { |
574 |
< |
final FutureTask ft = |
575 |
< |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
573 |
> |
public void testGetSet() { |
574 |
> |
final CountDownLatch pleaseSet = new CountDownLatch(2); |
575 |
> |
|
576 |
> |
final PublicFutureTask task = |
577 |
> |
new PublicFutureTask(new CheckedCallable<Object>() { |
578 |
|
public Object realCall() throws InterruptedException { |
579 |
< |
Thread.sleep(SMALL_DELAY_MS); |
239 |
< |
return Boolean.TRUE; |
579 |
> |
return two; |
580 |
|
}}); |
581 |
|
|
582 |
< |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
582 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
583 |
|
public void realRun() throws Exception { |
584 |
< |
ft.get(MEDIUM_DELAY_MS, MILLISECONDS); |
585 |
< |
}}; |
586 |
< |
Thread t2 = new Thread(ft); |
587 |
< |
t1.start(); |
588 |
< |
t2.start(); |
589 |
< |
Thread.sleep(SHORT_DELAY_MS); |
590 |
< |
ft.cancel(true); |
591 |
< |
t1.join(); |
592 |
< |
t2.join(); |
584 |
> |
pleaseSet.countDown(); |
585 |
> |
assertSame(two, task.get()); |
586 |
> |
}}); |
587 |
> |
|
588 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
589 |
> |
public void realRun() throws Exception { |
590 |
> |
pleaseSet.countDown(); |
591 |
> |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
592 |
> |
}}); |
593 |
> |
|
594 |
> |
await(pleaseSet); |
595 |
> |
checkNotDone(task); |
596 |
> |
assertTrue(t1.isAlive()); |
597 |
> |
assertTrue(t2.isAlive()); |
598 |
> |
task.set(two); |
599 |
> |
assertEquals(0, task.runCount()); |
600 |
> |
assertEquals(1, task.setCount()); |
601 |
> |
assertEquals(0, task.setExceptionCount()); |
602 |
> |
tryToConfuseDoneTask(task); |
603 |
> |
checkCompletedNormally(task, two); |
604 |
> |
awaitTermination(t1); |
605 |
> |
awaitTermination(t2); |
606 |
|
} |
607 |
|
|
608 |
|
/** |
609 |
< |
* Cancelling a task causes get in another thread to throw CancellationException |
610 |
< |
*/ |
611 |
< |
public void testGet_Cancellation() throws InterruptedException { |
612 |
< |
final FutureTask ft = |
613 |
< |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
614 |
< |
public Object realCall() throws InterruptedException { |
615 |
< |
Thread.sleep(SMALL_DELAY_MS); |
616 |
< |
return Boolean.TRUE; |
617 |
< |
}}); |
618 |
< |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
619 |
< |
public void realRun() throws Exception { |
620 |
< |
ft.get(); |
609 |
> |
* Cancelling a task causes timed get in another thread to throw |
610 |
> |
* CancellationException |
611 |
> |
*/ |
612 |
> |
public void testTimedGet_Cancellation() { |
613 |
> |
testTimedGet_Cancellation(false); |
614 |
> |
} |
615 |
> |
public void testTimedGet_Cancellation_interrupt() { |
616 |
> |
testTimedGet_Cancellation(true); |
617 |
> |
} |
618 |
> |
public void testTimedGet_Cancellation(final boolean mayInterruptIfRunning) { |
619 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(3); |
620 |
> |
final CountDownLatch cancelled = new CountDownLatch(1); |
621 |
> |
final Callable<Object> callable = |
622 |
> |
new CheckedCallable<Object>() { |
623 |
> |
public Object realCall() throws InterruptedException { |
624 |
> |
pleaseCancel.countDown(); |
625 |
> |
if (mayInterruptIfRunning) { |
626 |
> |
try { |
627 |
> |
delay(2*LONG_DELAY_MS); |
628 |
> |
} catch (InterruptedException success) {} |
629 |
> |
} else { |
630 |
> |
await(cancelled); |
631 |
> |
} |
632 |
> |
return two; |
633 |
|
}}; |
634 |
+ |
final PublicFutureTask task = new PublicFutureTask(callable); |
635 |
|
|
636 |
< |
Thread t2 = new Thread(ft); |
636 |
> |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
637 |
> |
public void realRun() throws Exception { |
638 |
> |
pleaseCancel.countDown(); |
639 |
> |
task.get(); |
640 |
> |
}}; |
641 |
> |
Thread t2 = new ThreadShouldThrow(CancellationException.class) { |
642 |
> |
public void realRun() throws Exception { |
643 |
> |
pleaseCancel.countDown(); |
644 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
645 |
> |
}}; |
646 |
|
t1.start(); |
647 |
|
t2.start(); |
648 |
< |
Thread.sleep(SHORT_DELAY_MS); |
649 |
< |
ft.cancel(true); |
650 |
< |
t1.join(); |
651 |
< |
t2.join(); |
648 |
> |
Thread t3 = newStartedThread(task); |
649 |
> |
await(pleaseCancel); |
650 |
> |
checkIsRunning(task); |
651 |
> |
task.cancel(mayInterruptIfRunning); |
652 |
> |
checkCancelled(task); |
653 |
> |
awaitTermination(t1); |
654 |
> |
awaitTermination(t2); |
655 |
> |
cancelled.countDown(); |
656 |
> |
awaitTermination(t3); |
657 |
> |
assertEquals(1, task.runCount()); |
658 |
> |
assertEquals(1, task.setCount()); |
659 |
> |
assertEquals(0, task.setExceptionCount()); |
660 |
> |
tryToConfuseDoneTask(task); |
661 |
> |
checkCancelled(task); |
662 |
|
} |
663 |
|
|
279 |
– |
|
664 |
|
/** |
665 |
|
* A runtime exception in task causes get to throw ExecutionException |
666 |
|
*/ |
667 |
|
public void testGet_ExecutionException() throws InterruptedException { |
668 |
< |
final FutureTask ft = new FutureTask(new Callable() { |
668 |
> |
final ArithmeticException e = new ArithmeticException(); |
669 |
> |
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
670 |
|
public Object call() { |
671 |
< |
return 5/0; |
671 |
> |
throw e; |
672 |
|
}}); |
673 |
|
|
674 |
< |
ft.run(); |
674 |
> |
task.run(); |
675 |
> |
assertEquals(1, task.runCount()); |
676 |
> |
assertEquals(0, task.setCount()); |
677 |
> |
assertEquals(1, task.setExceptionCount()); |
678 |
|
try { |
679 |
< |
ft.get(); |
679 |
> |
task.get(); |
680 |
|
shouldThrow(); |
681 |
|
} catch (ExecutionException success) { |
682 |
< |
assertTrue(success.getCause() instanceof ArithmeticException); |
682 |
> |
assertSame(e, success.getCause()); |
683 |
> |
tryToConfuseDoneTask(task); |
684 |
> |
checkCompletedAbnormally(task, success.getCause()); |
685 |
|
} |
686 |
|
} |
687 |
|
|
688 |
|
/** |
689 |
< |
* A runtime exception in task causes timed get to throw ExecutionException |
689 |
> |
* A runtime exception in task causes timed get to throw ExecutionException |
690 |
|
*/ |
691 |
|
public void testTimedGet_ExecutionException2() throws Exception { |
692 |
< |
final FutureTask ft = new FutureTask(new Callable() { |
692 |
> |
final ArithmeticException e = new ArithmeticException(); |
693 |
> |
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
694 |
|
public Object call() { |
695 |
< |
return 5/0; |
695 |
> |
throw e; |
696 |
|
}}); |
697 |
|
|
698 |
< |
ft.run(); |
698 |
> |
task.run(); |
699 |
|
try { |
700 |
< |
ft.get(SHORT_DELAY_MS, MILLISECONDS); |
700 |
> |
task.get(LONG_DELAY_MS, MILLISECONDS); |
701 |
|
shouldThrow(); |
702 |
|
} catch (ExecutionException success) { |
703 |
< |
assertTrue(success.getCause() instanceof ArithmeticException); |
703 |
> |
assertSame(e, success.getCause()); |
704 |
> |
tryToConfuseDoneTask(task); |
705 |
> |
checkCompletedAbnormally(task, success.getCause()); |
706 |
|
} |
707 |
|
} |
708 |
|
|
316 |
– |
|
709 |
|
/** |
710 |
< |
* Interrupting a waiting get causes it to throw InterruptedException |
710 |
> |
* get is interruptible |
711 |
|
*/ |
712 |
< |
public void testGet_InterruptedException() throws InterruptedException { |
713 |
< |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
714 |
< |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
712 |
> |
public void testGet_interruptible() { |
713 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
714 |
> |
final FutureTask task = new FutureTask(new NoOpCallable()); |
715 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
716 |
|
public void realRun() throws Exception { |
717 |
< |
ft.get(); |
717 |
> |
Thread.currentThread().interrupt(); |
718 |
> |
try { |
719 |
> |
task.get(); |
720 |
> |
shouldThrow(); |
721 |
> |
} catch (InterruptedException success) {} |
722 |
> |
assertFalse(Thread.interrupted()); |
723 |
> |
|
724 |
> |
pleaseInterrupt.countDown(); |
725 |
> |
try { |
726 |
> |
task.get(); |
727 |
> |
shouldThrow(); |
728 |
> |
} catch (InterruptedException success) {} |
729 |
> |
assertFalse(Thread.interrupted()); |
730 |
|
}}); |
731 |
|
|
732 |
< |
t.start(); |
328 |
< |
Thread.sleep(SHORT_DELAY_MS); |
732 |
> |
await(pleaseInterrupt); |
733 |
|
t.interrupt(); |
734 |
< |
t.join(); |
734 |
> |
awaitTermination(t); |
735 |
> |
checkNotDone(task); |
736 |
|
} |
737 |
|
|
738 |
|
/** |
739 |
< |
* Interrupting a waiting timed get causes it to throw InterruptedException |
739 |
> |
* timed get is interruptible |
740 |
|
*/ |
741 |
< |
public void testTimedGet_InterruptedException2() throws InterruptedException { |
742 |
< |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
743 |
< |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
741 |
> |
public void testTimedGet_interruptible() { |
742 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
743 |
> |
final FutureTask task = new FutureTask(new NoOpCallable()); |
744 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
745 |
|
public void realRun() throws Exception { |
746 |
< |
ft.get(LONG_DELAY_MS,MILLISECONDS); |
746 |
> |
Thread.currentThread().interrupt(); |
747 |
> |
try { |
748 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
749 |
> |
shouldThrow(); |
750 |
> |
} catch (InterruptedException success) {} |
751 |
> |
assertFalse(Thread.interrupted()); |
752 |
> |
|
753 |
> |
pleaseInterrupt.countDown(); |
754 |
> |
try { |
755 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
756 |
> |
shouldThrow(); |
757 |
> |
} catch (InterruptedException success) {} |
758 |
> |
assertFalse(Thread.interrupted()); |
759 |
|
}}); |
760 |
|
|
761 |
< |
t.start(); |
344 |
< |
Thread.sleep(SHORT_DELAY_MS); |
761 |
> |
await(pleaseInterrupt); |
762 |
|
t.interrupt(); |
763 |
< |
t.join(); |
763 |
> |
awaitTermination(t); |
764 |
> |
checkNotDone(task); |
765 |
|
} |
766 |
|
|
767 |
|
/** |
768 |
|
* A timed out timed get throws TimeoutException |
769 |
|
*/ |
770 |
|
public void testGet_TimeoutException() throws Exception { |
771 |
+ |
FutureTask task = new FutureTask(new NoOpCallable()); |
772 |
+ |
long startTime = System.nanoTime(); |
773 |
|
try { |
774 |
< |
FutureTask ft = new FutureTask(new NoOpCallable()); |
355 |
< |
ft.get(1,MILLISECONDS); |
774 |
> |
task.get(timeoutMillis(), MILLISECONDS); |
775 |
|
shouldThrow(); |
776 |
< |
} catch (TimeoutException success) {} |
776 |
> |
} catch (TimeoutException success) { |
777 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
778 |
> |
} |
779 |
> |
} |
780 |
> |
|
781 |
> |
/** |
782 |
> |
* timed get with null TimeUnit throws NullPointerException |
783 |
> |
*/ |
784 |
> |
public void testGet_NullTimeUnit() throws Exception { |
785 |
> |
FutureTask task = new FutureTask(new NoOpCallable()); |
786 |
> |
long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE }; |
787 |
> |
|
788 |
> |
for (long timeout : timeouts) { |
789 |
> |
try { |
790 |
> |
task.get(timeout, null); |
791 |
> |
shouldThrow(); |
792 |
> |
} catch (NullPointerException success) {} |
793 |
> |
} |
794 |
> |
|
795 |
> |
task.run(); |
796 |
> |
|
797 |
> |
for (long timeout : timeouts) { |
798 |
> |
try { |
799 |
> |
task.get(timeout, null); |
800 |
> |
shouldThrow(); |
801 |
> |
} catch (NullPointerException success) {} |
802 |
> |
} |
803 |
> |
} |
804 |
> |
|
805 |
> |
/** |
806 |
> |
* timed get with most negative timeout works correctly (i.e. no |
807 |
> |
* underflow bug) |
808 |
> |
*/ |
809 |
> |
public void testGet_NegativeInfinityTimeout() throws Exception { |
810 |
> |
final ExecutorService pool = Executors.newFixedThreadPool(10); |
811 |
> |
final Runnable nop = new Runnable() { public void run() {}}; |
812 |
> |
final FutureTask<Void> task = new FutureTask<>(nop, null); |
813 |
> |
final List<Future<?>> futures = new ArrayList<>(); |
814 |
> |
Runnable r = new Runnable() { public void run() { |
815 |
> |
for (long timeout : new long[] { 0L, -1L, Long.MIN_VALUE }) { |
816 |
> |
try { |
817 |
> |
task.get(timeout, NANOSECONDS); |
818 |
> |
shouldThrow(); |
819 |
> |
} catch (TimeoutException success) { |
820 |
> |
} catch (Throwable fail) {threadUnexpectedException(fail);}}}}; |
821 |
> |
for (int i = 0; i < 10; i++) |
822 |
> |
futures.add(pool.submit(r)); |
823 |
> |
try { |
824 |
> |
joinPool(pool); |
825 |
> |
for (Future<?> future : futures) |
826 |
> |
checkCompletedNormally(future, null); |
827 |
> |
} finally { |
828 |
> |
task.run(); // last resort to help terminate |
829 |
> |
} |
830 |
|
} |
831 |
|
|
832 |
|
} |