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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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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/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.*; |
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import java.util.concurrent.Callable; |
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import java.util.concurrent.CancellationException; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.ExecutionException; |
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import java.util.concurrent.Future; |
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import java.util.concurrent.FutureTask; |
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import java.util.concurrent.TimeoutException; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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import java.util.*; |
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|
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public class FutureTaskTest extends TestCase { |
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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); |
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return new TestSuite(FutureTaskTest.class); |
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} |
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|
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private static long SHORT_DELAY_MS = 100; |
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private static long MEDIUM_DELAY_MS = 1000; |
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private static long LONG_DELAY_MS = 10000; |
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void checkIsDone(Future<?> f) { |
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assertTrue(f.isDone()); |
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assertFalse(f.cancel(false)); |
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assertFalse(f.cancel(true)); |
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if (f instanceof PublicFutureTask) { |
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PublicFutureTask pf = (PublicFutureTask) f; |
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assertEquals(1, pf.doneCount()); |
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assertFalse(pf.runAndReset()); |
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assertEquals(1, pf.doneCount()); |
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|
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// Check that run and runAndReset have no effect. |
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int savedRunCount = pf.runCount(); |
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int savedSetCount = pf.setCount(); |
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int savedSetExceptionCount = pf.setExceptionCount(); |
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pf.run(); |
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pf.runAndReset(); |
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assertEquals(savedRunCount, pf.runCount()); |
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assertEquals(savedSetCount, pf.setCount()); |
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assertEquals(savedSetExceptionCount, pf.setExceptionCount()); |
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assertTrue(f.isDone()); |
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} |
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} |
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|
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public void testConstructor(){ |
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try { |
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FutureTask task = new FutureTask(null); |
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fail("should throw"); |
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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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catch(NullPointerException success) { |
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} |
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|
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void checkIsRunning(Future<?> f) { |
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checkNotDone(f); |
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if (f instanceof FutureTask) { |
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FutureTask ft = (FutureTask<?>) f; |
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// Check that run methods do nothing |
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ft.run(); |
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if (f instanceof PublicFutureTask) |
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assertFalse(((PublicFutureTask) f).runAndReset()); |
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checkNotDone(f); |
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} |
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} |
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|
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public void testConstructor2(){ |
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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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FutureTask task = new FutureTask(null, Boolean.TRUE); |
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fail("should throw"); |
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} |
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catch(NullPointerException success) { |
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assertSame(expected, f.get()); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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try { |
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assertSame(expected, f.get(5L, SECONDS)); |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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} |
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|
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void checkCancelled(Future<?> f) { |
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checkIsDone(f); |
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assertTrue(f.isCancelled()); |
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|
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try { |
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f.get(); |
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shouldThrow(); |
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} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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|
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try { |
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f.get(5L, SECONDS); |
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shouldThrow(); |
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} catch (CancellationException success) { |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
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} |
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|
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void tryToConfuseDoneTask(PublicFutureTask pf) { |
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pf.set(new Object()); |
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pf.setException(new Error()); |
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for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
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pf.cancel(true); |
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} |
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} |
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|
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public void testIsDone(){ |
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FutureTask task = new FutureTask( new Callable() { |
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public Object call() { return Boolean.TRUE; } }); |
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task.run(); |
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assertTrue(task.isDone()); |
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assertFalse(task.isCancelled()); |
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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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|
118 |
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try { |
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f.get(); |
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shouldThrow(); |
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} catch (ExecutionException success) { |
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assertSame(t, success.getCause()); |
123 |
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} catch (Throwable fail) { threadUnexpectedException(fail); } |
124 |
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|
125 |
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try { |
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f.get(5L, SECONDS); |
127 |
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shouldThrow(); |
128 |
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} catch (ExecutionException success) { |
129 |
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assertSame(t, success.getCause()); |
130 |
> |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
131 |
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} |
132 |
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|
133 |
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/** |
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* Subclass to expose protected methods |
135 |
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*/ |
136 |
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static class PublicFutureTask extends FutureTask { |
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private final AtomicInteger runCount; |
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private final AtomicInteger doneCount = new AtomicInteger(0); |
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> |
private final AtomicInteger runAndResetCount = new AtomicInteger(0); |
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> |
private final AtomicInteger setCount = new AtomicInteger(0); |
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private final AtomicInteger setExceptionCount = new AtomicInteger(0); |
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public int runCount() { return runCount.get(); } |
143 |
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public int doneCount() { return doneCount.get(); } |
144 |
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public int runAndResetCount() { return runAndResetCount.get(); } |
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public int setCount() { return setCount.get(); } |
146 |
> |
public int setExceptionCount() { return setExceptionCount.get(); } |
147 |
> |
|
148 |
> |
PublicFutureTask(Runnable runnable) { |
149 |
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this(runnable, seven); |
150 |
> |
} |
151 |
> |
PublicFutureTask(Runnable runnable, Object result) { |
152 |
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this(runnable, result, new AtomicInteger(0)); |
153 |
> |
} |
154 |
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private PublicFutureTask(final Runnable runnable, Object result, |
155 |
> |
final AtomicInteger runCount) { |
156 |
> |
super(new Runnable() { |
157 |
> |
public void run() { |
158 |
> |
runCount.getAndIncrement(); |
159 |
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runnable.run(); |
160 |
> |
}}, result); |
161 |
> |
this.runCount = runCount; |
162 |
> |
} |
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PublicFutureTask(Callable callable) { |
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this(callable, new AtomicInteger(0)); |
165 |
> |
} |
166 |
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private PublicFutureTask(final Callable callable, |
167 |
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final AtomicInteger runCount) { |
168 |
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super(new Callable() { |
169 |
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public Object call() throws Exception { |
170 |
> |
runCount.getAndIncrement(); |
171 |
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return callable.call(); |
172 |
> |
}}); |
173 |
> |
this.runCount = runCount; |
174 |
> |
} |
175 |
> |
@Override public void done() { |
176 |
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assertTrue(isDone()); |
177 |
> |
doneCount.incrementAndGet(); |
178 |
> |
super.done(); |
179 |
> |
} |
180 |
> |
@Override public boolean runAndReset() { |
181 |
> |
runAndResetCount.incrementAndGet(); |
182 |
> |
return super.runAndReset(); |
183 |
> |
} |
184 |
> |
@Override public void set(Object x) { |
185 |
> |
setCount.incrementAndGet(); |
186 |
> |
super.set(x); |
187 |
> |
} |
188 |
> |
@Override public void setException(Throwable t) { |
189 |
> |
setExceptionCount.incrementAndGet(); |
190 |
> |
super.setException(t); |
191 |
> |
} |
192 |
> |
} |
193 |
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|
194 |
> |
class Counter extends CheckedRunnable { |
195 |
> |
final AtomicInteger count = new AtomicInteger(0); |
196 |
> |
public int get() { return count.get(); } |
197 |
> |
public void realRun() { |
198 |
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count.getAndIncrement(); |
199 |
> |
} |
200 |
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} |
201 |
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|
202 |
> |
/** |
203 |
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* creating a future with a null callable throws NullPointerException |
204 |
> |
*/ |
205 |
> |
public void testConstructor() { |
206 |
> |
try { |
207 |
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new FutureTask(null); |
208 |
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shouldThrow(); |
209 |
> |
} catch (NullPointerException success) {} |
210 |
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} |
211 |
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|
212 |
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/** |
213 |
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* creating a future with null runnable throws NullPointerException |
214 |
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*/ |
215 |
+ |
public void testConstructor2() { |
216 |
+ |
try { |
217 |
+ |
new FutureTask(null, Boolean.TRUE); |
218 |
+ |
shouldThrow(); |
219 |
+ |
} catch (NullPointerException success) {} |
220 |
+ |
} |
221 |
+ |
|
222 |
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/** |
223 |
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* isDone is true when a task completes |
224 |
+ |
*/ |
225 |
+ |
public void testIsDone() { |
226 |
+ |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
227 |
+ |
assertFalse(task.isDone()); |
228 |
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task.run(); |
229 |
+ |
assertTrue(task.isDone()); |
230 |
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checkCompletedNormally(task, Boolean.TRUE); |
231 |
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assertEquals(1, task.runCount()); |
232 |
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} |
233 |
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|
234 |
+ |
/** |
235 |
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* runAndReset of a non-cancelled task succeeds |
236 |
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*/ |
237 |
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public void testRunAndReset() { |
238 |
+ |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
239 |
+ |
for (int i = 0; i < 3; i++) { |
240 |
+ |
assertTrue(task.runAndReset()); |
241 |
+ |
checkNotDone(task); |
242 |
+ |
assertEquals(i+1, task.runCount()); |
243 |
+ |
assertEquals(i+1, task.runAndResetCount()); |
244 |
+ |
assertEquals(0, task.setCount()); |
245 |
+ |
assertEquals(0, task.setExceptionCount()); |
246 |
+ |
} |
247 |
+ |
} |
248 |
+ |
|
249 |
+ |
/** |
250 |
+ |
* runAndReset after cancellation fails |
251 |
+ |
*/ |
252 |
+ |
public void testRunAndResetAfterCancel() { |
253 |
+ |
for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
254 |
+ |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
255 |
+ |
assertTrue(task.cancel(mayInterruptIfRunning)); |
256 |
+ |
for (int i = 0; i < 3; i++) { |
257 |
+ |
assertFalse(task.runAndReset()); |
258 |
+ |
assertEquals(0, task.runCount()); |
259 |
+ |
assertEquals(i+1, task.runAndResetCount()); |
260 |
+ |
assertEquals(0, task.setCount()); |
261 |
+ |
assertEquals(0, task.setExceptionCount()); |
262 |
+ |
} |
263 |
+ |
tryToConfuseDoneTask(task); |
264 |
+ |
checkCancelled(task); |
265 |
+ |
} |
266 |
+ |
} |
267 |
+ |
|
268 |
+ |
/** |
269 |
+ |
* setting value causes get to return it |
270 |
+ |
*/ |
271 |
+ |
public void testSet() throws Exception { |
272 |
+ |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
273 |
+ |
task.set(one); |
274 |
+ |
for (int i = 0; i < 3; i++) { |
275 |
+ |
assertSame(one, task.get()); |
276 |
+ |
assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS)); |
277 |
+ |
assertEquals(1, task.setCount()); |
278 |
+ |
} |
279 |
+ |
tryToConfuseDoneTask(task); |
280 |
+ |
checkCompletedNormally(task, one); |
281 |
+ |
assertEquals(0, task.runCount()); |
282 |
+ |
} |
283 |
+ |
|
284 |
+ |
/** |
285 |
+ |
* setException causes get to throw ExecutionException |
286 |
+ |
*/ |
287 |
+ |
public void testSetException_get() throws Exception { |
288 |
+ |
Exception nse = new NoSuchElementException(); |
289 |
+ |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
290 |
+ |
task.setException(nse); |
291 |
+ |
|
292 |
+ |
try { |
293 |
+ |
task.get(); |
294 |
+ |
shouldThrow(); |
295 |
+ |
} catch (ExecutionException success) { |
296 |
+ |
assertSame(nse, success.getCause()); |
297 |
+ |
checkCompletedAbnormally(task, nse); |
298 |
+ |
} |
299 |
+ |
|
300 |
+ |
try { |
301 |
+ |
task.get(LONG_DELAY_MS, MILLISECONDS); |
302 |
+ |
shouldThrow(); |
303 |
+ |
} catch (ExecutionException success) { |
304 |
+ |
assertSame(nse, success.getCause()); |
305 |
+ |
checkCompletedAbnormally(task, nse); |
306 |
+ |
} |
307 |
+ |
|
308 |
+ |
assertEquals(1, task.setExceptionCount()); |
309 |
+ |
assertEquals(0, task.setCount()); |
310 |
+ |
tryToConfuseDoneTask(task); |
311 |
+ |
checkCompletedAbnormally(task, nse); |
312 |
+ |
assertEquals(0, task.runCount()); |
313 |
+ |
} |
314 |
+ |
|
315 |
+ |
/** |
316 |
+ |
* cancel(false) before run succeeds |
317 |
+ |
*/ |
318 |
|
public void testCancelBeforeRun() { |
319 |
< |
FutureTask task = new FutureTask( new Callable() { |
52 |
< |
public Object call() { return Boolean.TRUE; } }); |
319 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
320 |
|
assertTrue(task.cancel(false)); |
321 |
< |
task.run(); |
322 |
< |
assertTrue(task.isDone()); |
323 |
< |
assertTrue(task.isCancelled()); |
321 |
> |
task.run(); |
322 |
> |
assertEquals(0, task.setCount()); |
323 |
> |
assertEquals(0, task.setExceptionCount()); |
324 |
> |
tryToConfuseDoneTask(task); |
325 |
> |
checkCancelled(task); |
326 |
> |
assertEquals(0, task.runCount()); |
327 |
|
} |
328 |
|
|
329 |
+ |
/** |
330 |
+ |
* cancel(true) before run succeeds |
331 |
+ |
*/ |
332 |
|
public void testCancelBeforeRun2() { |
333 |
< |
FutureTask task = new FutureTask( new Callable() { |
61 |
< |
public Object call() { return Boolean.TRUE; } }); |
333 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
334 |
|
assertTrue(task.cancel(true)); |
335 |
< |
task.run(); |
336 |
< |
assertTrue(task.isDone()); |
337 |
< |
assertTrue(task.isCancelled()); |
335 |
> |
task.run(); |
336 |
> |
assertEquals(0, task.setCount()); |
337 |
> |
assertEquals(0, task.setExceptionCount()); |
338 |
> |
tryToConfuseDoneTask(task); |
339 |
> |
checkCancelled(task); |
340 |
> |
assertEquals(0, task.runCount()); |
341 |
|
} |
342 |
|
|
343 |
+ |
/** |
344 |
+ |
* cancel(false) of a completed task fails |
345 |
+ |
*/ |
346 |
|
public void testCancelAfterRun() { |
347 |
< |
FutureTask task = new FutureTask( new Callable() { |
348 |
< |
public Object call() { return Boolean.TRUE; } }); |
71 |
< |
task.run(); |
347 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
348 |
> |
task.run(); |
349 |
|
assertFalse(task.cancel(false)); |
350 |
< |
assertTrue(task.isDone()); |
351 |
< |
assertFalse(task.isCancelled()); |
352 |
< |
} |
350 |
> |
assertEquals(1, task.setCount()); |
351 |
> |
assertEquals(0, task.setExceptionCount()); |
352 |
> |
tryToConfuseDoneTask(task); |
353 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
354 |
> |
assertEquals(1, task.runCount()); |
355 |
> |
} |
356 |
> |
|
357 |
> |
/** |
358 |
> |
* cancel(true) of a completed task fails |
359 |
> |
*/ |
360 |
> |
public void testCancelAfterRun2() { |
361 |
> |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
362 |
> |
task.run(); |
363 |
> |
assertFalse(task.cancel(true)); |
364 |
> |
assertEquals(1, task.setCount()); |
365 |
> |
assertEquals(0, task.setExceptionCount()); |
366 |
> |
tryToConfuseDoneTask(task); |
367 |
> |
checkCompletedNormally(task, Boolean.TRUE); |
368 |
> |
assertEquals(1, task.runCount()); |
369 |
> |
} |
370 |
> |
|
371 |
> |
/** |
372 |
> |
* cancel(true) interrupts a running task that subsequently succeeds |
373 |
> |
*/ |
374 |
> |
public void testCancelInterrupt() { |
375 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
376 |
> |
final PublicFutureTask task = |
377 |
> |
new PublicFutureTask(new CheckedRunnable() { |
378 |
> |
public void realRun() { |
379 |
> |
pleaseCancel.countDown(); |
380 |
> |
try { |
381 |
> |
delay(LONG_DELAY_MS); |
382 |
> |
shouldThrow(); |
383 |
> |
} catch (InterruptedException success) {} |
384 |
> |
}}); |
385 |
|
|
386 |
< |
public void testCancelInterrupt(){ |
387 |
< |
FutureTask task = new FutureTask( new Callable() { |
388 |
< |
public Object call() { |
386 |
> |
Thread t = newStartedThread(task); |
387 |
> |
await(pleaseCancel); |
388 |
> |
assertTrue(task.cancel(true)); |
389 |
> |
assertTrue(task.isCancelled()); |
390 |
> |
awaitTermination(t); |
391 |
> |
assertEquals(1, task.runCount()); |
392 |
> |
assertEquals(1, task.setCount()); |
393 |
> |
assertEquals(0, task.setExceptionCount()); |
394 |
> |
tryToConfuseDoneTask(task); |
395 |
> |
checkCancelled(task); |
396 |
> |
} |
397 |
> |
|
398 |
> |
/** |
399 |
> |
* cancel(true) interrupts a running task that subsequently throws |
400 |
> |
*/ |
401 |
> |
public void testCancelInterrupt_taskFails() { |
402 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
403 |
> |
final PublicFutureTask task = |
404 |
> |
new PublicFutureTask(new Runnable() { |
405 |
> |
public void run() { |
406 |
|
try { |
407 |
< |
Thread.sleep(SHORT_DELAY_MS* 2); |
408 |
< |
fail("should throw"); |
409 |
< |
} |
410 |
< |
catch (InterruptedException success) {} |
407 |
> |
pleaseCancel.countDown(); |
408 |
> |
delay(LONG_DELAY_MS); |
409 |
> |
} finally { throw new RuntimeException(); } |
410 |
> |
}}); |
411 |
> |
|
412 |
> |
Thread t = newStartedThread(task); |
413 |
> |
await(pleaseCancel); |
414 |
> |
assertTrue(task.cancel(true)); |
415 |
> |
assertTrue(task.isCancelled()); |
416 |
> |
awaitTermination(t); |
417 |
> |
assertEquals(1, task.runCount()); |
418 |
> |
assertEquals(0, task.setCount()); |
419 |
> |
assertEquals(1, task.setExceptionCount()); |
420 |
> |
tryToConfuseDoneTask(task); |
421 |
> |
checkCancelled(task); |
422 |
> |
} |
423 |
> |
|
424 |
> |
/** |
425 |
> |
* cancel(false) does not interrupt a running task |
426 |
> |
*/ |
427 |
> |
public void testCancelNoInterrupt() { |
428 |
> |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
429 |
> |
final CountDownLatch cancelled = new CountDownLatch(1); |
430 |
> |
final PublicFutureTask task = |
431 |
> |
new PublicFutureTask(new CheckedCallable<Boolean>() { |
432 |
> |
public Boolean realCall() { |
433 |
> |
pleaseCancel.countDown(); |
434 |
> |
await(cancelled); |
435 |
> |
assertFalse(Thread.interrupted()); |
436 |
|
return Boolean.TRUE; |
437 |
< |
} }); |
87 |
< |
Thread t = new Thread(task); |
88 |
< |
t.start(); |
89 |
< |
|
90 |
< |
try{ |
91 |
< |
Thread.sleep(SHORT_DELAY_MS); |
92 |
< |
assertTrue(task.cancel(true)); |
93 |
< |
t.join(); |
94 |
< |
assertTrue(task.isDone()); |
95 |
< |
assertTrue(task.isCancelled()); |
96 |
< |
} catch(InterruptedException e){ |
97 |
< |
fail("unexpected exception"); |
98 |
< |
} |
99 |
< |
} |
437 |
> |
}}); |
438 |
|
|
439 |
+ |
Thread t = newStartedThread(task); |
440 |
+ |
await(pleaseCancel); |
441 |
+ |
assertTrue(task.cancel(false)); |
442 |
+ |
assertTrue(task.isCancelled()); |
443 |
+ |
cancelled.countDown(); |
444 |
+ |
awaitTermination(t); |
445 |
+ |
assertEquals(1, task.runCount()); |
446 |
+ |
assertEquals(1, task.setCount()); |
447 |
+ |
assertEquals(0, task.setExceptionCount()); |
448 |
+ |
tryToConfuseDoneTask(task); |
449 |
+ |
checkCancelled(task); |
450 |
+ |
} |
451 |
+ |
|
452 |
+ |
/** |
453 |
+ |
* run in one thread causes get in another thread to retrieve value |
454 |
+ |
*/ |
455 |
+ |
public void testGetRun() { |
456 |
+ |
final CountDownLatch pleaseRun = new CountDownLatch(2); |
457 |
+ |
|
458 |
+ |
final PublicFutureTask task = |
459 |
+ |
new PublicFutureTask(new CheckedCallable<Object>() { |
460 |
+ |
public Object realCall() { |
461 |
+ |
return two; |
462 |
+ |
}}); |
463 |
+ |
|
464 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
465 |
+ |
public void realRun() throws Exception { |
466 |
+ |
pleaseRun.countDown(); |
467 |
+ |
assertSame(two, task.get()); |
468 |
+ |
}}); |
469 |
+ |
|
470 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
471 |
+ |
public void realRun() throws Exception { |
472 |
+ |
pleaseRun.countDown(); |
473 |
+ |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
474 |
+ |
}}); |
475 |
+ |
|
476 |
+ |
await(pleaseRun); |
477 |
+ |
checkNotDone(task); |
478 |
+ |
assertTrue(t1.isAlive()); |
479 |
+ |
assertTrue(t2.isAlive()); |
480 |
+ |
task.run(); |
481 |
+ |
checkCompletedNormally(task, two); |
482 |
+ |
assertEquals(1, task.runCount()); |
483 |
+ |
assertEquals(1, task.setCount()); |
484 |
+ |
assertEquals(0, task.setExceptionCount()); |
485 |
+ |
awaitTermination(t1); |
486 |
+ |
awaitTermination(t2); |
487 |
+ |
tryToConfuseDoneTask(task); |
488 |
+ |
checkCompletedNormally(task, two); |
489 |
+ |
} |
490 |
+ |
|
491 |
+ |
/** |
492 |
+ |
* set in one thread causes get in another thread to retrieve value |
493 |
+ |
*/ |
494 |
+ |
public void testGetSet() { |
495 |
+ |
final CountDownLatch pleaseSet = new CountDownLatch(2); |
496 |
+ |
|
497 |
+ |
final PublicFutureTask task = |
498 |
+ |
new PublicFutureTask(new CheckedCallable<Object>() { |
499 |
+ |
public Object realCall() throws InterruptedException { |
500 |
+ |
return two; |
501 |
+ |
}}); |
502 |
+ |
|
503 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
504 |
+ |
public void realRun() throws Exception { |
505 |
+ |
pleaseSet.countDown(); |
506 |
+ |
assertSame(two, task.get()); |
507 |
+ |
}}); |
508 |
+ |
|
509 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
510 |
+ |
public void realRun() throws Exception { |
511 |
+ |
pleaseSet.countDown(); |
512 |
+ |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
513 |
+ |
}}); |
514 |
+ |
|
515 |
+ |
await(pleaseSet); |
516 |
+ |
checkNotDone(task); |
517 |
+ |
assertTrue(t1.isAlive()); |
518 |
+ |
assertTrue(t2.isAlive()); |
519 |
+ |
task.set(two); |
520 |
+ |
assertEquals(0, task.runCount()); |
521 |
+ |
assertEquals(1, task.setCount()); |
522 |
+ |
assertEquals(0, task.setExceptionCount()); |
523 |
+ |
tryToConfuseDoneTask(task); |
524 |
+ |
checkCompletedNormally(task, two); |
525 |
+ |
awaitTermination(t1); |
526 |
+ |
awaitTermination(t2); |
527 |
+ |
} |
528 |
+ |
|
529 |
+ |
/** |
530 |
+ |
* Cancelling a task causes timed get in another thread to throw |
531 |
+ |
* CancellationException |
532 |
+ |
*/ |
533 |
+ |
public void testTimedGet_Cancellation() { |
534 |
+ |
for (final boolean mayInterruptIfRunning : |
535 |
+ |
new boolean[] { true, false }) { |
536 |
+ |
final CountDownLatch pleaseCancel = new CountDownLatch(3); |
537 |
+ |
final CountDownLatch cancelled = new CountDownLatch(1); |
538 |
+ |
final PublicFutureTask task = |
539 |
+ |
new PublicFutureTask(new CheckedCallable<Object>() { |
540 |
+ |
public Object realCall() throws InterruptedException { |
541 |
+ |
pleaseCancel.countDown(); |
542 |
+ |
if (mayInterruptIfRunning) { |
543 |
+ |
try { |
544 |
+ |
delay(2*LONG_DELAY_MS); |
545 |
+ |
} catch (InterruptedException success) {} |
546 |
+ |
} else { |
547 |
+ |
await(cancelled); |
548 |
+ |
} |
549 |
+ |
return two; |
550 |
+ |
}}); |
551 |
|
|
552 |
< |
public void testCancelNoInterrupt(){ |
553 |
< |
FutureTask task = new FutureTask( new Callable() { |
554 |
< |
public Object call() { |
555 |
< |
try { |
556 |
< |
Thread.sleep(SHORT_DELAY_MS* 2); |
557 |
< |
} |
558 |
< |
catch (InterruptedException success) { |
559 |
< |
fail("should not interrupt"); |
560 |
< |
} |
561 |
< |
return Boolean.TRUE; |
562 |
< |
} }); |
563 |
< |
Thread t = new Thread(task); |
564 |
< |
t.start(); |
565 |
< |
|
566 |
< |
try{ |
567 |
< |
Thread.sleep(SHORT_DELAY_MS); |
568 |
< |
assertTrue(task.cancel(false)); |
569 |
< |
t.join(); |
570 |
< |
assertTrue(task.isDone()); |
571 |
< |
assertTrue(task.isCancelled()); |
572 |
< |
} catch(InterruptedException e){ |
573 |
< |
fail("unexpected exception"); |
552 |
> |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
553 |
> |
public void realRun() throws Exception { |
554 |
> |
pleaseCancel.countDown(); |
555 |
> |
task.get(); |
556 |
> |
}}; |
557 |
> |
Thread t2 = new ThreadShouldThrow(CancellationException.class) { |
558 |
> |
public void realRun() throws Exception { |
559 |
> |
pleaseCancel.countDown(); |
560 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
561 |
> |
}}; |
562 |
> |
t1.start(); |
563 |
> |
t2.start(); |
564 |
> |
Thread t3 = newStartedThread(task); |
565 |
> |
await(pleaseCancel); |
566 |
> |
checkIsRunning(task); |
567 |
> |
task.cancel(mayInterruptIfRunning); |
568 |
> |
checkCancelled(task); |
569 |
> |
awaitTermination(t1); |
570 |
> |
awaitTermination(t2); |
571 |
> |
cancelled.countDown(); |
572 |
> |
awaitTermination(t3); |
573 |
> |
assertEquals(1, task.runCount()); |
574 |
> |
assertEquals(1, task.setCount()); |
575 |
> |
assertEquals(0, task.setExceptionCount()); |
576 |
> |
tryToConfuseDoneTask(task); |
577 |
> |
checkCancelled(task); |
578 |
|
} |
579 |
|
} |
580 |
|
|
581 |
< |
public void testGet1() { |
582 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
583 |
< |
public Object call(){ |
584 |
< |
try{ |
585 |
< |
Thread.sleep(MEDIUM_DELAY_MS); |
586 |
< |
} catch(InterruptedException e){ |
587 |
< |
fail("unexpected exception"); |
588 |
< |
} |
589 |
< |
return Boolean.TRUE; |
590 |
< |
} |
591 |
< |
}); |
592 |
< |
Thread t = new Thread(new Runnable(){ |
593 |
< |
public void run(){ |
594 |
< |
try{ |
595 |
< |
ft.get(); |
596 |
< |
} catch(Exception e){ |
597 |
< |
fail("unexpected exception"); |
598 |
< |
} |
599 |
< |
} |
600 |
< |
}); |
601 |
< |
try{ |
602 |
< |
assertFalse(ft.isDone()); |
149 |
< |
assertFalse(ft.isCancelled()); |
150 |
< |
t.start(); |
151 |
< |
Thread.sleep(SHORT_DELAY_MS); |
152 |
< |
ft.run(); |
153 |
< |
t.join(); |
154 |
< |
assertTrue(ft.isDone()); |
155 |
< |
assertFalse(ft.isCancelled()); |
156 |
< |
} catch(InterruptedException e){ |
157 |
< |
fail("unexpected exception"); |
158 |
< |
|
159 |
< |
} |
160 |
< |
} |
161 |
< |
|
162 |
< |
public void testTimedGet1() { |
163 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
164 |
< |
public Object call(){ |
165 |
< |
try{ |
166 |
< |
Thread.sleep(MEDIUM_DELAY_MS); |
167 |
< |
} catch(InterruptedException e){ |
168 |
< |
fail("unexpected exception"); |
169 |
< |
} |
170 |
< |
return Boolean.TRUE; |
171 |
< |
} |
172 |
< |
}); |
173 |
< |
Thread t = new Thread(new Runnable(){ |
174 |
< |
public void run(){ |
175 |
< |
try{ |
176 |
< |
ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
177 |
< |
} catch(TimeoutException success) { |
178 |
< |
} catch(Exception e){ |
179 |
< |
fail("unexpected exception"); |
180 |
< |
} |
181 |
< |
} |
182 |
< |
}); |
183 |
< |
try{ |
184 |
< |
assertFalse(ft.isDone()); |
185 |
< |
assertFalse(ft.isCancelled()); |
186 |
< |
t.start(); |
187 |
< |
ft.run(); |
188 |
< |
t.join(); |
189 |
< |
assertTrue(ft.isDone()); |
190 |
< |
assertFalse(ft.isCancelled()); |
191 |
< |
} catch(InterruptedException e){ |
192 |
< |
fail("unexpected exception"); |
193 |
< |
|
194 |
< |
} |
581 |
> |
/** |
582 |
> |
* A runtime exception in task causes get to throw ExecutionException |
583 |
> |
*/ |
584 |
> |
public void testGet_ExecutionException() throws InterruptedException { |
585 |
> |
final ArithmeticException e = new ArithmeticException(); |
586 |
> |
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
587 |
> |
public Object call() { |
588 |
> |
throw e; |
589 |
> |
}}); |
590 |
> |
|
591 |
> |
task.run(); |
592 |
> |
assertEquals(1, task.runCount()); |
593 |
> |
assertEquals(0, task.setCount()); |
594 |
> |
assertEquals(1, task.setExceptionCount()); |
595 |
> |
try { |
596 |
> |
task.get(); |
597 |
> |
shouldThrow(); |
598 |
> |
} catch (ExecutionException success) { |
599 |
> |
assertSame(e, success.getCause()); |
600 |
> |
tryToConfuseDoneTask(task); |
601 |
> |
checkCompletedAbnormally(task, success.getCause()); |
602 |
> |
} |
603 |
|
} |
604 |
|
|
605 |
+ |
/** |
606 |
+ |
* A runtime exception in task causes timed get to throw ExecutionException |
607 |
+ |
*/ |
608 |
+ |
public void testTimedGet_ExecutionException2() throws Exception { |
609 |
+ |
final ArithmeticException e = new ArithmeticException(); |
610 |
+ |
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
611 |
+ |
public Object call() { |
612 |
+ |
throw e; |
613 |
+ |
}}); |
614 |
|
|
615 |
< |
public void testGet_Cancellation(){ |
616 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
617 |
< |
public Object call(){ |
618 |
< |
try{ |
619 |
< |
Thread.sleep(MEDIUM_DELAY_MS); |
620 |
< |
} catch(InterruptedException e){ |
621 |
< |
fail("unexpected exception"); |
622 |
< |
} |
623 |
< |
return Boolean.TRUE; |
624 |
< |
} |
625 |
< |
}); |
626 |
< |
try { |
627 |
< |
Thread.sleep(SHORT_DELAY_MS); |
628 |
< |
Thread t = new Thread(new Runnable(){ |
629 |
< |
public void run(){ |
630 |
< |
try{ |
631 |
< |
ft.get(); |
632 |
< |
fail("should throw"); |
633 |
< |
} catch(CancellationException success){ |
634 |
< |
} |
635 |
< |
catch(Exception e){ |
636 |
< |
fail("unexpected exception"); |
637 |
< |
} |
638 |
< |
} |
639 |
< |
}); |
640 |
< |
t.start(); |
641 |
< |
ft.cancel(true); |
642 |
< |
t.join(); |
643 |
< |
} catch(InterruptedException success){ |
644 |
< |
fail("unexpected exception"); |
645 |
< |
} |
646 |
< |
} |
647 |
< |
|
648 |
< |
public void testGet_Cancellation2(){ |
649 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
650 |
< |
public Object call(){ |
651 |
< |
try{ |
652 |
< |
Thread.sleep(SHORT_DELAY_MS); |
653 |
< |
} catch(InterruptedException e) { |
654 |
< |
fail("unexpected exception"); |
655 |
< |
} |
656 |
< |
return Boolean.TRUE; |
657 |
< |
} |
658 |
< |
}); |
659 |
< |
try{ |
660 |
< |
Thread.sleep(100); |
661 |
< |
Thread t = new Thread(new Runnable(){ |
662 |
< |
public void run(){ |
663 |
< |
try{ |
664 |
< |
ft.get(3 * SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
665 |
< |
fail("should throw"); |
666 |
< |
} catch(CancellationException success) {} |
667 |
< |
catch(Exception e){ |
668 |
< |
fail("unexpected exception"); |
669 |
< |
} |
670 |
< |
} |
671 |
< |
}); |
672 |
< |
t.start(); |
673 |
< |
Thread.sleep(SHORT_DELAY_MS); |
674 |
< |
ft.cancel(true); |
675 |
< |
Thread.sleep(SHORT_DELAY_MS); |
676 |
< |
t.join(); |
677 |
< |
} catch(InterruptedException ie){ |
678 |
< |
fail("unexpected exception"); |
679 |
< |
} |
680 |
< |
} |
681 |
< |
|
682 |
< |
public void testGet_ExecutionException(){ |
683 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
684 |
< |
public Object call(){ |
685 |
< |
int i = 5/0; |
686 |
< |
return Boolean.TRUE; |
687 |
< |
} |
688 |
< |
}); |
689 |
< |
try{ |
690 |
< |
ft.run(); |
691 |
< |
ft.get(); |
692 |
< |
fail("should throw"); |
693 |
< |
} catch(ExecutionException success){ |
694 |
< |
} |
695 |
< |
catch(Exception e){ |
696 |
< |
fail("unexpected exception"); |
697 |
< |
} |
698 |
< |
} |
699 |
< |
|
700 |
< |
public void testTimedGet_ExecutionException2(){ |
701 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
702 |
< |
public Object call(){ |
703 |
< |
int i = 5/0; |
704 |
< |
return Boolean.TRUE; |
705 |
< |
} |
706 |
< |
}); |
707 |
< |
try{ |
708 |
< |
ft.run(); |
709 |
< |
ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
710 |
< |
fail("should throw"); |
711 |
< |
} catch(ExecutionException success) { |
712 |
< |
} catch(TimeoutException success) { } // unlikely but OK |
713 |
< |
catch(Exception e){ |
714 |
< |
fail("unexpected exception"); |
715 |
< |
} |
716 |
< |
} |
717 |
< |
|
718 |
< |
|
719 |
< |
public void testGet_InterruptedException(){ |
303 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
304 |
< |
public Object call(){ |
305 |
< |
return new Object(); |
306 |
< |
} |
307 |
< |
}); |
308 |
< |
Thread t = new Thread(new Runnable(){ |
309 |
< |
public void run(){ |
310 |
< |
try{ |
311 |
< |
ft.get(); |
312 |
< |
fail("should throw"); |
313 |
< |
} catch(InterruptedException success){ |
314 |
< |
} catch(Exception e){ |
315 |
< |
fail("unexpected exception"); |
316 |
< |
} |
317 |
< |
} |
318 |
< |
}); |
319 |
< |
try { |
320 |
< |
t.start(); |
321 |
< |
Thread.sleep(SHORT_DELAY_MS); |
322 |
< |
t.interrupt(); |
323 |
< |
t.join(); |
324 |
< |
} catch(Exception e){ |
325 |
< |
fail("unexpected exception"); |
326 |
< |
} |
327 |
< |
} |
328 |
< |
|
329 |
< |
public void testTimedGet_InterruptedException2(){ |
330 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
331 |
< |
public Object call(){ |
332 |
< |
return new Object(); |
333 |
< |
} |
334 |
< |
}); |
335 |
< |
Thread t = new Thread(new Runnable(){ |
336 |
< |
public void run(){ |
337 |
< |
try{ |
338 |
< |
ft.get(100,TimeUnit.SECONDS); |
339 |
< |
fail("should throw"); |
340 |
< |
} catch(InterruptedException success){} |
341 |
< |
catch(Exception e){ |
342 |
< |
fail("unexpected exception"); |
343 |
< |
} |
344 |
< |
} |
345 |
< |
}); |
346 |
< |
try { |
347 |
< |
t.start(); |
348 |
< |
Thread.sleep(SHORT_DELAY_MS); |
349 |
< |
t.interrupt(); |
350 |
< |
t.join(); |
351 |
< |
} catch(Exception e){ |
352 |
< |
fail("unexpected exception"); |
353 |
< |
} |
354 |
< |
} |
355 |
< |
|
356 |
< |
public void testGet_TimeoutException(){ |
357 |
< |
FutureTask ft = new FutureTask(new Callable(){ |
358 |
< |
public Object call(){ |
359 |
< |
return new Object(); |
360 |
< |
} |
361 |
< |
}); |
362 |
< |
try{ |
363 |
< |
ft.get(1,TimeUnit.MILLISECONDS); |
364 |
< |
fail("should throw"); |
365 |
< |
} catch(TimeoutException success){} |
366 |
< |
catch(Exception success){ |
367 |
< |
fail("unexpected exception"); |
368 |
< |
} |
369 |
< |
|
370 |
< |
|
615 |
> |
task.run(); |
616 |
> |
try { |
617 |
> |
task.get(LONG_DELAY_MS, MILLISECONDS); |
618 |
> |
shouldThrow(); |
619 |
> |
} catch (ExecutionException success) { |
620 |
> |
assertSame(e, success.getCause()); |
621 |
> |
tryToConfuseDoneTask(task); |
622 |
> |
checkCompletedAbnormally(task, success.getCause()); |
623 |
> |
} |
624 |
> |
} |
625 |
> |
|
626 |
> |
/** |
627 |
> |
* get is interruptible |
628 |
> |
*/ |
629 |
> |
public void testGet_interruptible() { |
630 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
631 |
> |
final FutureTask task = new FutureTask(new NoOpCallable()); |
632 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
633 |
> |
public void realRun() throws Exception { |
634 |
> |
Thread.currentThread().interrupt(); |
635 |
> |
try { |
636 |
> |
task.get(); |
637 |
> |
shouldThrow(); |
638 |
> |
} catch (InterruptedException success) {} |
639 |
> |
assertFalse(Thread.interrupted()); |
640 |
> |
|
641 |
> |
pleaseInterrupt.countDown(); |
642 |
> |
try { |
643 |
> |
task.get(); |
644 |
> |
shouldThrow(); |
645 |
> |
} catch (InterruptedException success) {} |
646 |
> |
assertFalse(Thread.interrupted()); |
647 |
> |
}}); |
648 |
> |
|
649 |
> |
await(pleaseInterrupt); |
650 |
> |
t.interrupt(); |
651 |
> |
awaitTermination(t); |
652 |
> |
checkNotDone(task); |
653 |
> |
} |
654 |
> |
|
655 |
> |
/** |
656 |
> |
* timed get is interruptible |
657 |
> |
*/ |
658 |
> |
public void testTimedGet_interruptible() { |
659 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
660 |
> |
final FutureTask task = new FutureTask(new NoOpCallable()); |
661 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
662 |
> |
public void realRun() throws Exception { |
663 |
> |
Thread.currentThread().interrupt(); |
664 |
> |
try { |
665 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
666 |
> |
shouldThrow(); |
667 |
> |
} catch (InterruptedException success) {} |
668 |
> |
assertFalse(Thread.interrupted()); |
669 |
> |
|
670 |
> |
pleaseInterrupt.countDown(); |
671 |
> |
try { |
672 |
> |
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
673 |
> |
shouldThrow(); |
674 |
> |
} catch (InterruptedException success) {} |
675 |
> |
assertFalse(Thread.interrupted()); |
676 |
> |
}}); |
677 |
> |
|
678 |
> |
await(pleaseInterrupt); |
679 |
> |
t.interrupt(); |
680 |
> |
awaitTermination(t); |
681 |
> |
checkNotDone(task); |
682 |
> |
} |
683 |
> |
|
684 |
> |
/** |
685 |
> |
* A timed out timed get throws TimeoutException |
686 |
> |
*/ |
687 |
> |
public void testGet_TimeoutException() throws Exception { |
688 |
> |
FutureTask task = new FutureTask(new NoOpCallable()); |
689 |
> |
long startTime = System.nanoTime(); |
690 |
> |
try { |
691 |
> |
task.get(timeoutMillis(), MILLISECONDS); |
692 |
> |
shouldThrow(); |
693 |
> |
} catch (TimeoutException success) { |
694 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
695 |
> |
} |
696 |
> |
} |
697 |
> |
|
698 |
> |
/** |
699 |
> |
* timed get with null TimeUnit throws NullPointerException |
700 |
> |
*/ |
701 |
> |
public void testGet_NullTimeUnit() throws Exception { |
702 |
> |
FutureTask task = new FutureTask(new NoOpCallable()); |
703 |
> |
long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE }; |
704 |
> |
|
705 |
> |
for (long timeout : timeouts) { |
706 |
> |
try { |
707 |
> |
task.get(timeout, null); |
708 |
> |
shouldThrow(); |
709 |
> |
} catch (NullPointerException success) {} |
710 |
> |
} |
711 |
> |
|
712 |
> |
task.run(); |
713 |
> |
|
714 |
> |
for (long timeout : timeouts) { |
715 |
> |
try { |
716 |
> |
task.get(timeout, null); |
717 |
> |
shouldThrow(); |
718 |
> |
} catch (NullPointerException success) {} |
719 |
> |
} |
720 |
|
} |
721 |
< |
|
721 |
> |
|
722 |
|
} |