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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. |
7 |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.*; |
10 |
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import java.util.concurrent.Callable; |
11 |
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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; |
15 |
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import java.util.concurrent.FutureTask; |
16 |
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import java.util.concurrent.TimeoutException; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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+ |
import static java.util.concurrent.TimeUnit.SECONDS; |
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import java.util.*; |
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|
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public class FutureTaskTest extends JSR166TestCase { |
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|
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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junit.textui.TestRunner.run(suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(FutureTaskTest.class); |
28 |
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} |
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|
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void checkNotDone(Future<?> f) { |
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assertFalse(f.isDone()); |
32 |
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assertFalse(f.isCancelled()); |
33 |
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} |
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|
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<T> void checkCompletedNormally(Future<T> f, T expected) { |
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assertTrue(f.isDone()); |
37 |
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assertFalse(f.isCancelled()); |
38 |
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|
39 |
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try { |
40 |
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assertSame(expected, f.get()); |
41 |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
42 |
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try { |
43 |
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assertSame(expected, f.get(5L, SECONDS)); |
44 |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
45 |
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|
46 |
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assertFalse(f.cancel(false)); |
47 |
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assertFalse(f.cancel(true)); |
48 |
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} |
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|
50 |
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void checkCancelled(Future<?> f) { |
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assertTrue(f.isDone()); |
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assertTrue(f.isCancelled()); |
53 |
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|
54 |
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try { |
55 |
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f.get(); |
56 |
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shouldThrow(); |
57 |
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} catch (CancellationException success) { |
58 |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
59 |
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|
60 |
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try { |
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f.get(5L, SECONDS); |
62 |
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shouldThrow(); |
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} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
65 |
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|
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assertFalse(f.cancel(false)); |
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assertFalse(f.cancel(true)); |
68 |
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} |
69 |
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|
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void checkCompletedAbnormally(Future<?> f, Throwable t) { |
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assertTrue(f.isDone()); |
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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(); |
77 |
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} catch (ExecutionException success) { |
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assertSame(t, success.getCause()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
80 |
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|
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try { |
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f.get(5L, SECONDS); |
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shouldThrow(); |
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} catch (ExecutionException success) { |
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assertSame(t, success.getCause()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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|
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assertFalse(f.cancel(false)); |
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assertFalse(f.cancel(true)); |
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} |
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|
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/** |
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* Subclass to expose protected methods |
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*/ |
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FutureTask task = new FutureTask(new NoOpCallable()); |
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task.run(); |
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assertTrue(task.isDone()); |
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assertFalse(task.isCancelled()); |
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checkCompletedNormally(task, Boolean.TRUE); |
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} |
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|
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/** |
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public void testRunAndReset() { |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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assertTrue(task.runAndReset()); |
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assertFalse(task.isDone()); |
138 |
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checkNotDone(task); |
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} |
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|
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/** |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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assertTrue(task.cancel(false)); |
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assertFalse(task.runAndReset()); |
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assertTrue(task.isDone()); |
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assertTrue(task.isCancelled()); |
148 |
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checkCancelled(task); |
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} |
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|
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|
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|
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/** |
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* setting value causes get to return it |
153 |
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*/ |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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task.set(one); |
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assertSame(task.get(), one); |
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checkCompletedNormally(task, one); |
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} |
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|
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/** |
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shouldThrow(); |
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} catch (ExecutionException success) { |
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assertSame(success.getCause(), nse); |
173 |
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checkCompletedAbnormally(task, nse); |
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} |
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} |
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|
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/** |
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* Cancelling before running succeeds |
178 |
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* Cancelling before running succeeds |
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*/ |
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public void testCancelBeforeRun() { |
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FutureTask task = new FutureTask(new NoOpCallable()); |
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assertTrue(task.cancel(false)); |
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task.run(); |
184 |
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assertTrue(task.isDone()); |
117 |
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assertTrue(task.isCancelled()); |
184 |
> |
checkCancelled(task); |
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} |
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|
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/** |
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FutureTask task = new FutureTask(new NoOpCallable()); |
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assertTrue(task.cancel(true)); |
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task.run(); |
194 |
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assertTrue(task.isDone()); |
128 |
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assertTrue(task.isCancelled()); |
194 |
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checkCancelled(task); |
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} |
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|
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/** |
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FutureTask task = new FutureTask(new NoOpCallable()); |
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task.run(); |
203 |
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assertFalse(task.cancel(false)); |
204 |
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assertTrue(task.isDone()); |
139 |
< |
assertFalse(task.isCancelled()); |
204 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
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} |
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|
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/** |
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* cancel(true) interrupts a running task |
209 |
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*/ |
210 |
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public void testCancelInterrupt() throws InterruptedException { |
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final CountDownLatch threadStarted = new CountDownLatch(1); |
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final FutureTask task = |
213 |
< |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
214 |
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public Object realCall() throws InterruptedException { |
215 |
< |
Thread.sleep(SMALL_DELAY_MS); |
216 |
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return Boolean.TRUE; |
213 |
> |
new FutureTask(new CheckedCallable<Object>() { |
214 |
> |
public Object realCall() { |
215 |
> |
threadStarted.countDown(); |
216 |
> |
long t0 = System.nanoTime(); |
217 |
> |
for (;;) { |
218 |
> |
if (Thread.interrupted()) |
219 |
> |
return Boolean.TRUE; |
220 |
> |
if (millisElapsedSince(t0) > MEDIUM_DELAY_MS) |
221 |
> |
fail("interrupt not delivered"); |
222 |
> |
Thread.yield(); |
223 |
> |
} |
224 |
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}}); |
225 |
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|
226 |
< |
Thread t = new Thread(task); |
227 |
< |
t.start(); |
155 |
< |
Thread.sleep(SHORT_DELAY_MS); |
226 |
> |
Thread t = newStartedThread(task); |
227 |
> |
threadStarted.await(); |
228 |
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assertTrue(task.cancel(true)); |
229 |
< |
t.join(); |
230 |
< |
assertTrue(task.isDone()); |
231 |
< |
assertTrue(task.isCancelled()); |
229 |
> |
checkCancelled(task); |
230 |
> |
awaitTermination(t, MEDIUM_DELAY_MS); |
231 |
> |
checkCancelled(task); |
232 |
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} |
233 |
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|
162 |
– |
|
234 |
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/** |
235 |
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* cancel(false) does not interrupt a running task |
236 |
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*/ |
237 |
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public void testCancelNoInterrupt() throws InterruptedException { |
238 |
+ |
final CountDownLatch threadStarted = new CountDownLatch(1); |
239 |
+ |
final CountDownLatch cancelled = new CountDownLatch(1); |
240 |
+ |
final FutureTask<Boolean> task = |
241 |
+ |
new FutureTask<Boolean>(new CheckedCallable<Boolean>() { |
242 |
+ |
public Boolean realCall() throws InterruptedException { |
243 |
+ |
threadStarted.countDown(); |
244 |
+ |
cancelled.await(MEDIUM_DELAY_MS, MILLISECONDS); |
245 |
+ |
assertFalse(Thread.interrupted()); |
246 |
+ |
return Boolean.TRUE; |
247 |
+ |
}}); |
248 |
+ |
|
249 |
+ |
Thread t = newStartedThread(task); |
250 |
+ |
threadStarted.await(); |
251 |
+ |
assertTrue(task.cancel(false)); |
252 |
+ |
checkCancelled(task); |
253 |
+ |
cancelled.countDown(); |
254 |
+ |
awaitTermination(t, MEDIUM_DELAY_MS); |
255 |
+ |
checkCancelled(task); |
256 |
+ |
} |
257 |
+ |
|
258 |
+ |
/** |
259 |
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* run in one thread causes get in another thread to retrieve value |
260 |
+ |
*/ |
261 |
+ |
public void testGetRun() throws InterruptedException { |
262 |
+ |
final CountDownLatch threadStarted = new CountDownLatch(1); |
263 |
+ |
|
264 |
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final FutureTask task = |
265 |
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new FutureTask(new CheckedCallable<Object>() { |
266 |
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public Object realCall() throws InterruptedException { |
170 |
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Thread.sleep(MEDIUM_DELAY_MS); |
267 |
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return Boolean.TRUE; |
268 |
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}}); |
269 |
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|
270 |
< |
Thread t = new Thread(task); |
271 |
< |
t.start(); |
272 |
< |
Thread.sleep(SHORT_DELAY_MS); |
273 |
< |
assertTrue(task.cancel(false)); |
274 |
< |
t.join(); |
275 |
< |
assertTrue(task.isDone()); |
276 |
< |
assertTrue(task.isCancelled()); |
270 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
271 |
> |
public void realRun() throws Exception { |
272 |
> |
threadStarted.countDown(); |
273 |
> |
assertSame(Boolean.TRUE, task.get()); |
274 |
> |
}}); |
275 |
> |
|
276 |
> |
threadStarted.await(); |
277 |
> |
checkNotDone(task); |
278 |
> |
assertTrue(t.isAlive()); |
279 |
> |
task.run(); |
280 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
281 |
> |
awaitTermination(t, MEDIUM_DELAY_MS); |
282 |
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} |
283 |
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|
284 |
|
/** |
285 |
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* set in one thread causes get in another thread to retrieve value |
286 |
|
*/ |
287 |
< |
public void testGet1() throws InterruptedException { |
288 |
< |
final FutureTask ft = |
287 |
> |
public void testGetSet() throws InterruptedException { |
288 |
> |
final CountDownLatch threadStarted = new CountDownLatch(1); |
289 |
> |
|
290 |
> |
final PublicFutureTask task = |
291 |
> |
new PublicFutureTask(new CheckedCallable<Object>() { |
292 |
> |
public Object realCall() throws InterruptedException { |
293 |
> |
return Boolean.TRUE; |
294 |
> |
}}); |
295 |
> |
|
296 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
297 |
> |
public void realRun() throws Exception { |
298 |
> |
threadStarted.countDown(); |
299 |
> |
assertSame(Boolean.FALSE, task.get()); |
300 |
> |
}}); |
301 |
> |
|
302 |
> |
threadStarted.await(); |
303 |
> |
checkNotDone(task); |
304 |
> |
assertTrue(t.isAlive()); |
305 |
> |
task.set(Boolean.FALSE); |
306 |
> |
checkCompletedNormally(task, Boolean.FALSE); |
307 |
> |
awaitTermination(t, MEDIUM_DELAY_MS); |
308 |
> |
} |
309 |
> |
|
310 |
> |
/** |
311 |
> |
* run in one thread causes timed get in another thread to retrieve value |
312 |
> |
*/ |
313 |
> |
public void testTimedGetRun() throws InterruptedException { |
314 |
> |
final CountDownLatch threadStarted = new CountDownLatch(1); |
315 |
> |
|
316 |
> |
final FutureTask task = |
317 |
|
new FutureTask(new CheckedCallable<Object>() { |
318 |
|
public Object realCall() throws InterruptedException { |
319 |
|
return Boolean.TRUE; |
320 |
|
}}); |
321 |
< |
Thread t = new Thread(new CheckedRunnable() { |
321 |
> |
|
322 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
323 |
|
public void realRun() throws Exception { |
324 |
< |
assertSame(Boolean.TRUE, ft.get()); |
324 |
> |
threadStarted.countDown(); |
325 |
> |
assertSame(Boolean.TRUE, |
326 |
> |
task.get(MEDIUM_DELAY_MS, MILLISECONDS)); |
327 |
|
}}); |
328 |
|
|
329 |
< |
assertFalse(ft.isDone()); |
330 |
< |
assertFalse(ft.isCancelled()); |
331 |
< |
t.start(); |
332 |
< |
Thread.sleep(SHORT_DELAY_MS); |
333 |
< |
ft.run(); |
334 |
< |
t.join(); |
203 |
< |
assertTrue(ft.isDone()); |
204 |
< |
assertFalse(ft.isCancelled()); |
329 |
> |
threadStarted.await(); |
330 |
> |
checkNotDone(task); |
331 |
> |
assertTrue(t.isAlive()); |
332 |
> |
task.run(); |
333 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
334 |
> |
awaitTermination(t, MEDIUM_DELAY_MS); |
335 |
|
} |
336 |
|
|
337 |
|
/** |
338 |
|
* set in one thread causes timed get in another thread to retrieve value |
339 |
|
*/ |
340 |
< |
public void testTimedGet1() throws InterruptedException { |
341 |
< |
final FutureTask ft = |
342 |
< |
new FutureTask(new CheckedCallable<Object>() { |
340 |
> |
public void testTimedGetSet() throws InterruptedException { |
341 |
> |
final CountDownLatch threadStarted = new CountDownLatch(1); |
342 |
> |
|
343 |
> |
final PublicFutureTask task = |
344 |
> |
new PublicFutureTask(new CheckedCallable<Object>() { |
345 |
|
public Object realCall() throws InterruptedException { |
346 |
|
return Boolean.TRUE; |
347 |
|
}}); |
348 |
< |
Thread t = new Thread(new CheckedRunnable() { |
348 |
> |
|
349 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
350 |
|
public void realRun() throws Exception { |
351 |
< |
assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS)); |
351 |
> |
threadStarted.countDown(); |
352 |
> |
assertSame(Boolean.FALSE, |
353 |
> |
task.get(MEDIUM_DELAY_MS, MILLISECONDS)); |
354 |
|
}}); |
355 |
|
|
356 |
< |
assertFalse(ft.isDone()); |
357 |
< |
assertFalse(ft.isCancelled()); |
358 |
< |
t.start(); |
359 |
< |
Thread.sleep(SHORT_DELAY_MS); |
360 |
< |
ft.run(); |
361 |
< |
t.join(); |
227 |
< |
assertTrue(ft.isDone()); |
228 |
< |
assertFalse(ft.isCancelled()); |
356 |
> |
threadStarted.await(); |
357 |
> |
checkNotDone(task); |
358 |
> |
assertTrue(t.isAlive()); |
359 |
> |
task.set(Boolean.FALSE); |
360 |
> |
checkCompletedNormally(task, Boolean.FALSE); |
361 |
> |
awaitTermination(t, MEDIUM_DELAY_MS); |
362 |
|
} |
363 |
|
|
364 |
|
/** |
365 |
< |
* Cancelling a task causes timed get in another thread to throw CancellationException |
365 |
> |
* Cancelling a task causes timed get in another thread to throw |
366 |
> |
* CancellationException |
367 |
|
*/ |
368 |
|
public void testTimedGet_Cancellation() throws InterruptedException { |
369 |
< |
final FutureTask ft = |
369 |
> |
final CountDownLatch threadStarted = new CountDownLatch(2); |
370 |
> |
final FutureTask task = |
371 |
|
new FutureTask(new CheckedInterruptedCallable<Object>() { |
372 |
|
public Object realCall() throws InterruptedException { |
373 |
< |
Thread.sleep(SMALL_DELAY_MS); |
373 |
> |
threadStarted.countDown(); |
374 |
> |
delay(LONG_DELAY_MS); |
375 |
|
return Boolean.TRUE; |
376 |
|
}}); |
377 |
|
|
378 |
|
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
379 |
|
public void realRun() throws Exception { |
380 |
< |
ft.get(MEDIUM_DELAY_MS, MILLISECONDS); |
380 |
> |
threadStarted.countDown(); |
381 |
> |
task.get(MEDIUM_DELAY_MS, MILLISECONDS); |
382 |
|
}}; |
383 |
< |
Thread t2 = new Thread(ft); |
383 |
> |
Thread t2 = new Thread(task); |
384 |
|
t1.start(); |
385 |
|
t2.start(); |
386 |
< |
Thread.sleep(SHORT_DELAY_MS); |
387 |
< |
ft.cancel(true); |
388 |
< |
t1.join(); |
389 |
< |
t2.join(); |
386 |
> |
threadStarted.await(); |
387 |
> |
task.cancel(true); |
388 |
> |
awaitTermination(t1, MEDIUM_DELAY_MS); |
389 |
> |
awaitTermination(t2, MEDIUM_DELAY_MS); |
390 |
> |
checkCancelled(task); |
391 |
|
} |
392 |
|
|
393 |
|
/** |
394 |
< |
* Cancelling a task causes get in another thread to throw CancellationException |
394 |
> |
* Cancelling a task causes get in another thread to throw |
395 |
> |
* CancellationException |
396 |
|
*/ |
397 |
|
public void testGet_Cancellation() throws InterruptedException { |
398 |
< |
final FutureTask ft = |
398 |
> |
final CountDownLatch threadStarted = new CountDownLatch(2); |
399 |
> |
final FutureTask task = |
400 |
|
new FutureTask(new CheckedInterruptedCallable<Object>() { |
401 |
|
public Object realCall() throws InterruptedException { |
402 |
< |
Thread.sleep(SMALL_DELAY_MS); |
402 |
> |
threadStarted.countDown(); |
403 |
> |
delay(LONG_DELAY_MS); |
404 |
|
return Boolean.TRUE; |
405 |
|
}}); |
406 |
+ |
|
407 |
|
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
408 |
|
public void realRun() throws Exception { |
409 |
< |
ft.get(); |
409 |
> |
threadStarted.countDown(); |
410 |
> |
task.get(); |
411 |
|
}}; |
412 |
< |
|
270 |
< |
Thread t2 = new Thread(ft); |
412 |
> |
Thread t2 = new Thread(task); |
413 |
|
t1.start(); |
414 |
|
t2.start(); |
415 |
< |
Thread.sleep(SHORT_DELAY_MS); |
416 |
< |
ft.cancel(true); |
417 |
< |
t1.join(); |
418 |
< |
t2.join(); |
415 |
> |
threadStarted.await(); |
416 |
> |
task.cancel(true); |
417 |
> |
awaitTermination(t1, MEDIUM_DELAY_MS); |
418 |
> |
awaitTermination(t2, MEDIUM_DELAY_MS); |
419 |
> |
checkCancelled(task); |
420 |
|
} |
421 |
|
|
279 |
– |
|
422 |
|
/** |
423 |
|
* A runtime exception in task causes get to throw ExecutionException |
424 |
|
*/ |
425 |
|
public void testGet_ExecutionException() throws InterruptedException { |
426 |
< |
final FutureTask ft = new FutureTask(new Callable() { |
426 |
> |
final FutureTask task = new FutureTask(new Callable() { |
427 |
|
public Object call() { |
428 |
|
return 5/0; |
429 |
|
}}); |
430 |
|
|
431 |
< |
ft.run(); |
431 |
> |
task.run(); |
432 |
|
try { |
433 |
< |
ft.get(); |
433 |
> |
task.get(); |
434 |
|
shouldThrow(); |
435 |
|
} catch (ExecutionException success) { |
436 |
|
assertTrue(success.getCause() instanceof ArithmeticException); |
437 |
+ |
checkCompletedAbnormally(task, success.getCause()); |
438 |
|
} |
439 |
|
} |
440 |
|
|
441 |
|
/** |
442 |
< |
* A runtime exception in task causes timed get to throw ExecutionException |
442 |
> |
* A runtime exception in task causes timed get to throw ExecutionException |
443 |
|
*/ |
444 |
|
public void testTimedGet_ExecutionException2() throws Exception { |
445 |
< |
final FutureTask ft = new FutureTask(new Callable() { |
445 |
> |
final FutureTask task = new FutureTask(new Callable() { |
446 |
|
public Object call() { |
447 |
|
return 5/0; |
448 |
|
}}); |
449 |
|
|
450 |
< |
ft.run(); |
450 |
> |
task.run(); |
451 |
|
try { |
452 |
< |
ft.get(SHORT_DELAY_MS, MILLISECONDS); |
452 |
> |
task.get(SHORT_DELAY_MS, MILLISECONDS); |
453 |
|
shouldThrow(); |
454 |
|
} catch (ExecutionException success) { |
455 |
|
assertTrue(success.getCause() instanceof ArithmeticException); |
456 |
+ |
checkCompletedAbnormally(task, success.getCause()); |
457 |
|
} |
458 |
|
} |
459 |
|
|
316 |
– |
|
460 |
|
/** |
461 |
|
* Interrupting a waiting get causes it to throw InterruptedException |
462 |
|
*/ |
463 |
|
public void testGet_InterruptedException() throws InterruptedException { |
464 |
< |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
465 |
< |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
464 |
> |
final CountDownLatch threadStarted = new CountDownLatch(1); |
465 |
> |
final FutureTask task = new FutureTask(new NoOpCallable()); |
466 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
467 |
|
public void realRun() throws Exception { |
468 |
< |
ft.get(); |
468 |
> |
threadStarted.countDown(); |
469 |
> |
task.get(); |
470 |
|
}}); |
471 |
|
|
472 |
< |
t.start(); |
328 |
< |
Thread.sleep(SHORT_DELAY_MS); |
472 |
> |
threadStarted.await(); |
473 |
|
t.interrupt(); |
474 |
< |
t.join(); |
474 |
> |
awaitTermination(t); |
475 |
> |
checkNotDone(task); |
476 |
|
} |
477 |
|
|
478 |
|
/** |
479 |
< |
* Interrupting a waiting timed get causes it to throw InterruptedException |
479 |
> |
* Interrupting a waiting timed get causes it to throw InterruptedException |
480 |
|
*/ |
481 |
|
public void testTimedGet_InterruptedException2() throws InterruptedException { |
482 |
< |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
483 |
< |
Thread t = new Thread(new CheckedInterruptedRunnable() { |
482 |
> |
final CountDownLatch threadStarted = new CountDownLatch(1); |
483 |
> |
final FutureTask task = new FutureTask(new NoOpCallable()); |
484 |
> |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
485 |
|
public void realRun() throws Exception { |
486 |
< |
ft.get(LONG_DELAY_MS,MILLISECONDS); |
486 |
> |
threadStarted.countDown(); |
487 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
488 |
|
}}); |
489 |
|
|
490 |
< |
t.start(); |
344 |
< |
Thread.sleep(SHORT_DELAY_MS); |
490 |
> |
threadStarted.await(); |
491 |
|
t.interrupt(); |
492 |
< |
t.join(); |
492 |
> |
awaitTermination(t); |
493 |
> |
checkNotDone(task); |
494 |
|
} |
495 |
|
|
496 |
|
/** |
498 |
|
*/ |
499 |
|
public void testGet_TimeoutException() throws Exception { |
500 |
|
try { |
501 |
< |
FutureTask ft = new FutureTask(new NoOpCallable()); |
502 |
< |
ft.get(1,MILLISECONDS); |
501 |
> |
FutureTask task = new FutureTask(new NoOpCallable()); |
502 |
> |
task.get(1, MILLISECONDS); |
503 |
|
shouldThrow(); |
504 |
|
} catch (TimeoutException success) {} |
505 |
|
} |