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/* |
/* |
2 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
* Expert Group and released to the public domain, as explained at |
* Expert Group and released to the public domain, as explained at |
4 |
* http://creativecommons.org/licenses/publicdomain |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
* Pat Fisher, Mike Judd. |
7 |
*/ |
*/ |
8 |
|
|
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import junit.framework.*; |
import junit.framework.*; |
10 |
import java.util.concurrent.*; |
import java.security.Permission; |
11 |
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import java.util.concurrent.Callable; |
12 |
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import java.util.concurrent.CancellationException; |
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import java.util.concurrent.CountDownLatch; |
14 |
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import java.util.concurrent.ExecutionException; |
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import java.util.concurrent.Future; |
16 |
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import java.util.concurrent.FutureTask; |
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import java.util.concurrent.TimeoutException; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
import static java.util.concurrent.TimeUnit.SECONDS; |
21 |
import java.util.*; |
import java.util.*; |
29 |
return new TestSuite(FutureTaskTest.class); |
return new TestSuite(FutureTaskTest.class); |
30 |
} |
} |
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|
32 |
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void checkIsDone(Future<?> f) { |
33 |
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assertTrue(f.isDone()); |
34 |
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assertFalse(f.cancel(false)); |
35 |
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assertFalse(f.cancel(true)); |
36 |
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if (f instanceof PublicFutureTask) { |
37 |
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PublicFutureTask pf = (PublicFutureTask) f; |
38 |
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assertEquals(1, pf.doneCount()); |
39 |
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assertFalse(pf.runAndReset()); |
40 |
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assertEquals(1, pf.doneCount()); |
41 |
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|
42 |
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// Check that run and runAndReset have no effect. |
43 |
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int savedRunCount = pf.runCount(); |
44 |
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int savedSetCount = pf.setCount(); |
45 |
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int savedSetExceptionCount = pf.setExceptionCount(); |
46 |
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pf.run(); |
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pf.runAndReset(); |
48 |
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assertEquals(savedRunCount, pf.runCount()); |
49 |
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assertEquals(savedSetCount, pf.setCount()); |
50 |
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assertEquals(savedSetExceptionCount, pf.setExceptionCount()); |
51 |
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assertTrue(f.isDone()); |
52 |
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} |
53 |
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} |
54 |
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|
55 |
void checkNotDone(Future<?> f) { |
void checkNotDone(Future<?> f) { |
56 |
assertFalse(f.isDone()); |
assertFalse(f.isDone()); |
57 |
assertFalse(f.isCancelled()); |
assertFalse(f.isCancelled()); |
58 |
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if (f instanceof PublicFutureTask) { |
59 |
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PublicFutureTask pf = (PublicFutureTask) f; |
60 |
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assertEquals(0, pf.doneCount()); |
61 |
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assertEquals(0, pf.setCount()); |
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assertEquals(0, pf.setExceptionCount()); |
63 |
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} |
64 |
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} |
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|
66 |
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void checkIsRunning(Future<?> f) { |
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checkNotDone(f); |
68 |
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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) |
73 |
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assertFalse(((PublicFutureTask) f).runAndReset()); |
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checkNotDone(f); |
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} |
76 |
} |
} |
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|
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<T> void checkCompletedNormally(Future<T> f, T expected) { |
<T> void checkCompletedNormally(Future<T> f, T expected) { |
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assertTrue(f.isDone()); |
checkIsDone(f); |
80 |
assertFalse(f.isCancelled()); |
assertFalse(f.isCancelled()); |
81 |
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|
82 |
try { |
try { |
85 |
try { |
try { |
86 |
assertSame(expected, f.get(5L, SECONDS)); |
assertSame(expected, f.get(5L, SECONDS)); |
87 |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
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assertFalse(f.cancel(false)); |
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assertFalse(f.cancel(true)); |
|
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} |
} |
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|
90 |
void checkCancelled(Future<?> f) { |
void checkCancelled(Future<?> f) { |
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assertTrue(f.isDone()); |
checkIsDone(f); |
92 |
assertTrue(f.isCancelled()); |
assertTrue(f.isCancelled()); |
93 |
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|
94 |
try { |
try { |
102 |
shouldThrow(); |
shouldThrow(); |
103 |
} catch (CancellationException success) { |
} catch (CancellationException success) { |
104 |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
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} |
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|
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assertFalse(f.cancel(false)); |
void tryToConfuseDoneTask(PublicFutureTask pf) { |
108 |
assertFalse(f.cancel(true)); |
pf.set(new Object()); |
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pf.setException(new Error()); |
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for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
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pf.cancel(true); |
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} |
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} |
} |
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|
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void checkCompletedAbnormally(Future<?> f, Throwable t) { |
void checkCompletedAbnormally(Future<?> f, Throwable t) { |
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assertTrue(f.isDone()); |
checkIsDone(f); |
117 |
assertFalse(f.isCancelled()); |
assertFalse(f.isCancelled()); |
118 |
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|
119 |
try { |
try { |
129 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
130 |
assertSame(t, success.getCause()); |
assertSame(t, success.getCause()); |
131 |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
} catch (Throwable fail) { threadUnexpectedException(fail); } |
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assertFalse(f.cancel(false)); |
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assertFalse(f.cancel(true)); |
|
132 |
} |
} |
133 |
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|
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/** |
/** |
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* Subclass to expose protected methods |
* Subclass to expose protected methods |
136 |
*/ |
*/ |
137 |
static class PublicFutureTask extends FutureTask { |
static class PublicFutureTask extends FutureTask { |
138 |
public PublicFutureTask(Callable r) { super(r); } |
private final AtomicInteger runCount; |
139 |
public boolean runAndReset() { return super.runAndReset(); } |
private final AtomicInteger doneCount = new AtomicInteger(0); |
140 |
public void set(Object x) { super.set(x); } |
private final AtomicInteger runAndResetCount = new AtomicInteger(0); |
141 |
public void setException(Throwable t) { super.setException(t); } |
private final AtomicInteger setCount = new AtomicInteger(0); |
142 |
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private final AtomicInteger setExceptionCount = new AtomicInteger(0); |
143 |
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public int runCount() { return runCount.get(); } |
144 |
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public int doneCount() { return doneCount.get(); } |
145 |
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public int runAndResetCount() { return runAndResetCount.get(); } |
146 |
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public int setCount() { return setCount.get(); } |
147 |
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public int setExceptionCount() { return setExceptionCount.get(); } |
148 |
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|
149 |
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PublicFutureTask(Runnable runnable) { |
150 |
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this(runnable, seven); |
151 |
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} |
152 |
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PublicFutureTask(Runnable runnable, Object result) { |
153 |
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this(runnable, result, new AtomicInteger(0)); |
154 |
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} |
155 |
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private PublicFutureTask(final Runnable runnable, Object result, |
156 |
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final AtomicInteger runCount) { |
157 |
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super(new Runnable() { |
158 |
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public void run() { |
159 |
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runCount.getAndIncrement(); |
160 |
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runnable.run(); |
161 |
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}}, result); |
162 |
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this.runCount = runCount; |
163 |
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} |
164 |
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PublicFutureTask(Callable callable) { |
165 |
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this(callable, new AtomicInteger(0)); |
166 |
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} |
167 |
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private PublicFutureTask(final Callable callable, |
168 |
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final AtomicInteger runCount) { |
169 |
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super(new Callable() { |
170 |
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public Object call() throws Exception { |
171 |
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runCount.getAndIncrement(); |
172 |
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return callable.call(); |
173 |
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}}); |
174 |
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this.runCount = runCount; |
175 |
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} |
176 |
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@Override public void done() { |
177 |
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assertTrue(isDone()); |
178 |
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doneCount.incrementAndGet(); |
179 |
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super.done(); |
180 |
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} |
181 |
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@Override public boolean runAndReset() { |
182 |
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runAndResetCount.incrementAndGet(); |
183 |
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return super.runAndReset(); |
184 |
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} |
185 |
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@Override public void set(Object x) { |
186 |
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setCount.incrementAndGet(); |
187 |
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super.set(x); |
188 |
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} |
189 |
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@Override public void setException(Throwable t) { |
190 |
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setExceptionCount.incrementAndGet(); |
191 |
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super.setException(t); |
192 |
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} |
193 |
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} |
194 |
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|
195 |
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class Counter extends CheckedRunnable { |
196 |
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final AtomicInteger count = new AtomicInteger(0); |
197 |
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public int get() { return count.get(); } |
198 |
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public void realRun() { |
199 |
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count.getAndIncrement(); |
200 |
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} |
201 |
} |
} |
202 |
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|
203 |
/** |
/** |
204 |
* Creating a future with a null callable throws NPE |
* creating a future with a null callable throws NullPointerException |
205 |
*/ |
*/ |
206 |
public void testConstructor() { |
public void testConstructor() { |
207 |
try { |
try { |
208 |
FutureTask task = new FutureTask(null); |
new FutureTask(null); |
209 |
shouldThrow(); |
shouldThrow(); |
210 |
} catch (NullPointerException success) {} |
} catch (NullPointerException success) {} |
211 |
} |
} |
212 |
|
|
213 |
/** |
/** |
214 |
* creating a future with null runnable fails |
* creating a future with null runnable throws NullPointerException |
215 |
*/ |
*/ |
216 |
public void testConstructor2() { |
public void testConstructor2() { |
217 |
try { |
try { |
218 |
FutureTask task = new FutureTask(null, Boolean.TRUE); |
new FutureTask(null, Boolean.TRUE); |
219 |
shouldThrow(); |
shouldThrow(); |
220 |
} catch (NullPointerException success) {} |
} catch (NullPointerException success) {} |
221 |
} |
} |
224 |
* isDone is true when a task completes |
* isDone is true when a task completes |
225 |
*/ |
*/ |
226 |
public void testIsDone() { |
public void testIsDone() { |
227 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
228 |
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assertFalse(task.isDone()); |
229 |
task.run(); |
task.run(); |
230 |
assertTrue(task.isDone()); |
assertTrue(task.isDone()); |
231 |
checkCompletedNormally(task, Boolean.TRUE); |
checkCompletedNormally(task, Boolean.TRUE); |
232 |
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assertEquals(1, task.runCount()); |
233 |
} |
} |
234 |
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|
235 |
/** |
/** |
237 |
*/ |
*/ |
238 |
public void testRunAndReset() { |
public void testRunAndReset() { |
239 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
240 |
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for (int i = 0; i < 3; i++) { |
241 |
assertTrue(task.runAndReset()); |
assertTrue(task.runAndReset()); |
242 |
checkNotDone(task); |
checkNotDone(task); |
243 |
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assertEquals(i+1, task.runCount()); |
244 |
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assertEquals(i+1, task.runAndResetCount()); |
245 |
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assertEquals(0, task.setCount()); |
246 |
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assertEquals(0, task.setExceptionCount()); |
247 |
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} |
248 |
} |
} |
249 |
|
|
250 |
/** |
/** |
251 |
* runAndReset after cancellation fails |
* runAndReset after cancellation fails |
252 |
*/ |
*/ |
253 |
public void testResetAfterCancel() { |
public void testRunAndResetAfterCancel() { |
254 |
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for (boolean mayInterruptIfRunning : new boolean[] { true, false }) { |
255 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
256 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(mayInterruptIfRunning)); |
257 |
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for (int i = 0; i < 3; i++) { |
258 |
assertFalse(task.runAndReset()); |
assertFalse(task.runAndReset()); |
259 |
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assertEquals(0, task.runCount()); |
260 |
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assertEquals(i+1, task.runAndResetCount()); |
261 |
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assertEquals(0, task.setCount()); |
262 |
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assertEquals(0, task.setExceptionCount()); |
263 |
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} |
264 |
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tryToConfuseDoneTask(task); |
265 |
checkCancelled(task); |
checkCancelled(task); |
266 |
} |
} |
267 |
|
} |
268 |
|
|
269 |
/** |
/** |
270 |
* setting value causes get to return it |
* setting value causes get to return it |
272 |
public void testSet() throws Exception { |
public void testSet() throws Exception { |
273 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
274 |
task.set(one); |
task.set(one); |
275 |
assertSame(task.get(), one); |
for (int i = 0; i < 3; i++) { |
276 |
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assertSame(one, task.get()); |
277 |
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assertSame(one, task.get(LONG_DELAY_MS, MILLISECONDS)); |
278 |
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assertEquals(1, task.setCount()); |
279 |
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} |
280 |
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tryToConfuseDoneTask(task); |
281 |
checkCompletedNormally(task, one); |
checkCompletedNormally(task, one); |
282 |
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assertEquals(0, task.runCount()); |
283 |
} |
} |
284 |
|
|
285 |
/** |
/** |
286 |
* setException causes get to throw ExecutionException |
* setException causes get to throw ExecutionException |
287 |
*/ |
*/ |
288 |
public void testSetException() throws Exception { |
public void testSetException_get() throws Exception { |
289 |
Exception nse = new NoSuchElementException(); |
Exception nse = new NoSuchElementException(); |
290 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
291 |
task.setException(nse); |
task.setException(nse); |
292 |
|
|
293 |
try { |
try { |
294 |
Object x = task.get(); |
task.get(); |
295 |
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shouldThrow(); |
296 |
|
} catch (ExecutionException success) { |
297 |
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assertSame(nse, success.getCause()); |
298 |
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checkCompletedAbnormally(task, nse); |
299 |
|
} |
300 |
|
|
301 |
|
try { |
302 |
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task.get(LONG_DELAY_MS, MILLISECONDS); |
303 |
shouldThrow(); |
shouldThrow(); |
304 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
305 |
assertSame(success.getCause(), nse); |
assertSame(nse, success.getCause()); |
306 |
checkCompletedAbnormally(task, nse); |
checkCompletedAbnormally(task, nse); |
307 |
} |
} |
308 |
|
|
309 |
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assertEquals(1, task.setExceptionCount()); |
310 |
|
assertEquals(0, task.setCount()); |
311 |
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tryToConfuseDoneTask(task); |
312 |
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checkCompletedAbnormally(task, nse); |
313 |
|
assertEquals(0, task.runCount()); |
314 |
} |
} |
315 |
|
|
316 |
/** |
/** |
317 |
* Cancelling before running succeeds |
* cancel(false) before run succeeds |
318 |
*/ |
*/ |
319 |
public void testCancelBeforeRun() { |
public void testCancelBeforeRun() { |
320 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
321 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(false)); |
322 |
task.run(); |
task.run(); |
323 |
|
assertEquals(0, task.runCount()); |
324 |
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assertEquals(0, task.setCount()); |
325 |
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assertEquals(0, task.setExceptionCount()); |
326 |
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assertTrue(task.isCancelled()); |
327 |
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assertTrue(task.isDone()); |
328 |
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tryToConfuseDoneTask(task); |
329 |
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assertEquals(0, task.runCount()); |
330 |
checkCancelled(task); |
checkCancelled(task); |
331 |
} |
} |
332 |
|
|
333 |
/** |
/** |
334 |
* Cancel(true) before run succeeds |
* cancel(true) before run succeeds |
335 |
*/ |
*/ |
336 |
public void testCancelBeforeRun2() { |
public void testCancelBeforeRun2() { |
337 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
338 |
assertTrue(task.cancel(true)); |
assertTrue(task.cancel(true)); |
339 |
task.run(); |
task.run(); |
340 |
|
assertEquals(0, task.runCount()); |
341 |
|
assertEquals(0, task.setCount()); |
342 |
|
assertEquals(0, task.setExceptionCount()); |
343 |
|
assertTrue(task.isCancelled()); |
344 |
|
assertTrue(task.isDone()); |
345 |
|
tryToConfuseDoneTask(task); |
346 |
|
assertEquals(0, task.runCount()); |
347 |
checkCancelled(task); |
checkCancelled(task); |
348 |
} |
} |
349 |
|
|
350 |
/** |
/** |
351 |
* cancel of a completed task fails |
* cancel(false) of a completed task fails |
352 |
*/ |
*/ |
353 |
public void testCancelAfterRun() { |
public void testCancelAfterRun() { |
354 |
FutureTask task = new FutureTask(new NoOpCallable()); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
355 |
task.run(); |
task.run(); |
356 |
assertFalse(task.cancel(false)); |
assertFalse(task.cancel(false)); |
357 |
|
assertEquals(1, task.runCount()); |
358 |
|
assertEquals(1, task.setCount()); |
359 |
|
assertEquals(0, task.setExceptionCount()); |
360 |
|
tryToConfuseDoneTask(task); |
361 |
checkCompletedNormally(task, Boolean.TRUE); |
checkCompletedNormally(task, Boolean.TRUE); |
362 |
|
assertEquals(1, task.runCount()); |
363 |
} |
} |
364 |
|
|
365 |
/** |
/** |
366 |
* cancel(true) interrupts a running task |
* cancel(true) of a completed task fails |
367 |
*/ |
*/ |
368 |
public void testCancelInterrupt() throws InterruptedException { |
public void testCancelAfterRun2() { |
369 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
370 |
final FutureTask task = |
task.run(); |
371 |
new FutureTask(new CheckedCallable<Object>() { |
assertFalse(task.cancel(true)); |
372 |
public Object realCall() { |
assertEquals(1, task.runCount()); |
373 |
threadStarted.countDown(); |
assertEquals(1, task.setCount()); |
374 |
long t0 = System.nanoTime(); |
assertEquals(0, task.setExceptionCount()); |
375 |
for (;;) { |
tryToConfuseDoneTask(task); |
376 |
if (Thread.interrupted()) |
checkCompletedNormally(task, Boolean.TRUE); |
377 |
return Boolean.TRUE; |
assertEquals(1, task.runCount()); |
|
if (millisElapsedSince(t0) > MEDIUM_DELAY_MS) |
|
|
fail("interrupt not delivered"); |
|
|
Thread.yield(); |
|
378 |
} |
} |
379 |
|
|
380 |
|
/** |
381 |
|
* cancel(true) interrupts a running task that subsequently succeeds |
382 |
|
*/ |
383 |
|
public void testCancelInterrupt() { |
384 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
385 |
|
final PublicFutureTask task = |
386 |
|
new PublicFutureTask(new CheckedRunnable() { |
387 |
|
public void realRun() { |
388 |
|
pleaseCancel.countDown(); |
389 |
|
try { |
390 |
|
delay(LONG_DELAY_MS); |
391 |
|
shouldThrow(); |
392 |
|
} catch (InterruptedException success) {} |
393 |
}}); |
}}); |
394 |
|
|
395 |
Thread t = newStartedThread(task); |
Thread t = newStartedThread(task); |
396 |
threadStarted.await(); |
await(pleaseCancel); |
397 |
assertTrue(task.cancel(true)); |
assertTrue(task.cancel(true)); |
398 |
|
assertTrue(task.isCancelled()); |
399 |
|
assertTrue(task.isDone()); |
400 |
|
awaitTermination(t); |
401 |
|
assertEquals(1, task.runCount()); |
402 |
|
assertEquals(1, task.setCount()); |
403 |
|
assertEquals(0, task.setExceptionCount()); |
404 |
|
tryToConfuseDoneTask(task); |
405 |
checkCancelled(task); |
checkCancelled(task); |
406 |
awaitTermination(t, MEDIUM_DELAY_MS); |
} |
407 |
|
|
408 |
|
/** |
409 |
|
* cancel(true) tries to interrupt a running task, but |
410 |
|
* Thread.interrupt throws (simulating a restrictive security |
411 |
|
* manager) |
412 |
|
*/ |
413 |
|
public void testCancelInterrupt_ThrowsSecurityException() { |
414 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
415 |
|
final CountDownLatch cancelled = new CountDownLatch(1); |
416 |
|
final PublicFutureTask task = |
417 |
|
new PublicFutureTask(new CheckedRunnable() { |
418 |
|
public void realRun() { |
419 |
|
pleaseCancel.countDown(); |
420 |
|
await(cancelled); |
421 |
|
assertFalse(Thread.interrupted()); |
422 |
|
}}); |
423 |
|
|
424 |
|
final Thread t = new Thread(task) { |
425 |
|
// Simulate a restrictive security manager. |
426 |
|
@Override public void interrupt() { |
427 |
|
throw new SecurityException(); |
428 |
|
}}; |
429 |
|
t.setDaemon(true); |
430 |
|
t.start(); |
431 |
|
|
432 |
|
await(pleaseCancel); |
433 |
|
try { |
434 |
|
task.cancel(true); |
435 |
|
shouldThrow(); |
436 |
|
} catch (SecurityException expected) {} |
437 |
|
|
438 |
|
// We failed to deliver the interrupt, but the world retains |
439 |
|
// its sanity, as if we had done task.cancel(false) |
440 |
|
assertTrue(task.isCancelled()); |
441 |
|
assertTrue(task.isDone()); |
442 |
|
assertEquals(1, task.runCount()); |
443 |
|
assertEquals(1, task.doneCount()); |
444 |
|
assertEquals(0, task.setCount()); |
445 |
|
assertEquals(0, task.setExceptionCount()); |
446 |
|
cancelled.countDown(); |
447 |
|
awaitTermination(t); |
448 |
|
assertEquals(1, task.setCount()); |
449 |
|
assertEquals(0, task.setExceptionCount()); |
450 |
|
tryToConfuseDoneTask(task); |
451 |
|
checkCancelled(task); |
452 |
|
} |
453 |
|
|
454 |
|
/** |
455 |
|
* cancel(true) interrupts a running task that subsequently throws |
456 |
|
*/ |
457 |
|
public void testCancelInterrupt_taskFails() { |
458 |
|
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
459 |
|
final PublicFutureTask task = |
460 |
|
new PublicFutureTask(new Runnable() { |
461 |
|
public void run() { |
462 |
|
try { |
463 |
|
pleaseCancel.countDown(); |
464 |
|
delay(LONG_DELAY_MS); |
465 |
|
} finally { throw new RuntimeException(); } |
466 |
|
}}); |
467 |
|
|
468 |
|
Thread t = newStartedThread(task); |
469 |
|
await(pleaseCancel); |
470 |
|
assertTrue(task.cancel(true)); |
471 |
|
assertTrue(task.isCancelled()); |
472 |
|
awaitTermination(t); |
473 |
|
assertEquals(1, task.runCount()); |
474 |
|
assertEquals(0, task.setCount()); |
475 |
|
assertEquals(1, task.setExceptionCount()); |
476 |
|
tryToConfuseDoneTask(task); |
477 |
checkCancelled(task); |
checkCancelled(task); |
478 |
} |
} |
479 |
|
|
480 |
/** |
/** |
481 |
* cancel(false) does not interrupt a running task |
* cancel(false) does not interrupt a running task |
482 |
*/ |
*/ |
483 |
public void testCancelNoInterrupt() throws InterruptedException { |
public void testCancelNoInterrupt() { |
484 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
final CountDownLatch pleaseCancel = new CountDownLatch(1); |
485 |
final CountDownLatch cancelled = new CountDownLatch(1); |
final CountDownLatch cancelled = new CountDownLatch(1); |
486 |
final FutureTask<Boolean> task = |
final PublicFutureTask task = |
487 |
new FutureTask<Boolean>(new CheckedCallable<Boolean>() { |
new PublicFutureTask(new CheckedCallable<Boolean>() { |
488 |
public Boolean realCall() throws InterruptedException { |
public Boolean realCall() { |
489 |
threadStarted.countDown(); |
pleaseCancel.countDown(); |
490 |
cancelled.await(MEDIUM_DELAY_MS, MILLISECONDS); |
await(cancelled); |
491 |
assertFalse(Thread.interrupted()); |
assertFalse(Thread.interrupted()); |
492 |
return Boolean.TRUE; |
return Boolean.TRUE; |
493 |
}}); |
}}); |
494 |
|
|
495 |
Thread t = newStartedThread(task); |
Thread t = newStartedThread(task); |
496 |
threadStarted.await(); |
await(pleaseCancel); |
497 |
assertTrue(task.cancel(false)); |
assertTrue(task.cancel(false)); |
498 |
checkCancelled(task); |
assertTrue(task.isCancelled()); |
499 |
cancelled.countDown(); |
cancelled.countDown(); |
500 |
awaitTermination(t, MEDIUM_DELAY_MS); |
awaitTermination(t); |
501 |
|
assertEquals(1, task.runCount()); |
502 |
|
assertEquals(1, task.setCount()); |
503 |
|
assertEquals(0, task.setExceptionCount()); |
504 |
|
tryToConfuseDoneTask(task); |
505 |
checkCancelled(task); |
checkCancelled(task); |
506 |
} |
} |
507 |
|
|
508 |
/** |
/** |
509 |
* set in one thread causes get in another thread to retrieve value |
* run in one thread causes get in another thread to retrieve value |
510 |
*/ |
*/ |
511 |
public void testGet1() throws InterruptedException { |
public void testGetRun() { |
512 |
final FutureTask task = |
final CountDownLatch pleaseRun = new CountDownLatch(2); |
513 |
new FutureTask(new CheckedCallable<Object>() { |
|
514 |
public Object realCall() throws InterruptedException { |
final PublicFutureTask task = |
515 |
return Boolean.TRUE; |
new PublicFutureTask(new CheckedCallable<Object>() { |
516 |
|
public Object realCall() { |
517 |
|
return two; |
518 |
}}); |
}}); |
|
checkNotDone(task); |
|
519 |
|
|
520 |
Thread t = newStartedThread(new CheckedRunnable() { |
Thread t1 = newStartedThread(new CheckedRunnable() { |
521 |
|
public void realRun() throws Exception { |
522 |
|
pleaseRun.countDown(); |
523 |
|
assertSame(two, task.get()); |
524 |
|
}}); |
525 |
|
|
526 |
|
Thread t2 = newStartedThread(new CheckedRunnable() { |
527 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
528 |
assertSame(Boolean.TRUE, task.get()); |
pleaseRun.countDown(); |
529 |
|
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
530 |
}}); |
}}); |
531 |
|
|
532 |
|
await(pleaseRun); |
533 |
|
checkNotDone(task); |
534 |
|
assertTrue(t1.isAlive()); |
535 |
|
assertTrue(t2.isAlive()); |
536 |
task.run(); |
task.run(); |
537 |
checkCompletedNormally(task, Boolean.TRUE); |
checkCompletedNormally(task, two); |
538 |
awaitTermination(t, MEDIUM_DELAY_MS); |
assertEquals(1, task.runCount()); |
539 |
|
assertEquals(1, task.setCount()); |
540 |
|
assertEquals(0, task.setExceptionCount()); |
541 |
|
awaitTermination(t1); |
542 |
|
awaitTermination(t2); |
543 |
|
tryToConfuseDoneTask(task); |
544 |
|
checkCompletedNormally(task, two); |
545 |
} |
} |
546 |
|
|
547 |
/** |
/** |
548 |
* set in one thread causes timed get in another thread to retrieve value |
* set in one thread causes get in another thread to retrieve value |
549 |
*/ |
*/ |
550 |
public void testTimedGet1() throws InterruptedException { |
public void testGetSet() { |
551 |
final FutureTask task = |
final CountDownLatch pleaseSet = new CountDownLatch(2); |
552 |
new FutureTask(new CheckedCallable<Object>() { |
|
553 |
|
final PublicFutureTask task = |
554 |
|
new PublicFutureTask(new CheckedCallable<Object>() { |
555 |
public Object realCall() throws InterruptedException { |
public Object realCall() throws InterruptedException { |
556 |
return Boolean.TRUE; |
return two; |
557 |
}}); |
}}); |
|
checkNotDone(task); |
|
558 |
|
|
559 |
Thread t = newStartedThread(new CheckedRunnable() { |
Thread t1 = newStartedThread(new CheckedRunnable() { |
560 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
561 |
assertSame(Boolean.TRUE, task.get(SMALL_DELAY_MS, MILLISECONDS)); |
pleaseSet.countDown(); |
562 |
|
assertSame(two, task.get()); |
563 |
}}); |
}}); |
564 |
|
|
565 |
task.run(); |
Thread t2 = newStartedThread(new CheckedRunnable() { |
566 |
checkCompletedNormally(task, Boolean.TRUE); |
public void realRun() throws Exception { |
567 |
awaitTermination(t, MEDIUM_DELAY_MS); |
pleaseSet.countDown(); |
568 |
} |
assertSame(two, task.get(2*LONG_DELAY_MS, MILLISECONDS)); |
|
|
|
|
/** |
|
|
* Cancelling a task causes timed get in another thread to throw |
|
|
* CancellationException |
|
|
*/ |
|
|
public void testTimedGet_Cancellation() throws InterruptedException { |
|
|
final CountDownLatch threadStarted = new CountDownLatch(2); |
|
|
final FutureTask task = |
|
|
new FutureTask(new CheckedInterruptedCallable<Object>() { |
|
|
public Object realCall() throws InterruptedException { |
|
|
threadStarted.countDown(); |
|
|
Thread.sleep(LONG_DELAY_MS); |
|
|
return Boolean.TRUE; |
|
569 |
}}); |
}}); |
570 |
|
|
571 |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
await(pleaseSet); |
572 |
public void realRun() throws Exception { |
checkNotDone(task); |
573 |
threadStarted.countDown(); |
assertTrue(t1.isAlive()); |
574 |
task.get(MEDIUM_DELAY_MS, MILLISECONDS); |
assertTrue(t2.isAlive()); |
575 |
}}; |
task.set(two); |
576 |
Thread t2 = new Thread(task); |
assertEquals(0, task.runCount()); |
577 |
t1.start(); |
assertEquals(1, task.setCount()); |
578 |
t2.start(); |
assertEquals(0, task.setExceptionCount()); |
579 |
threadStarted.await(); |
tryToConfuseDoneTask(task); |
580 |
task.cancel(true); |
checkCompletedNormally(task, two); |
581 |
awaitTermination(t1, MEDIUM_DELAY_MS); |
awaitTermination(t1); |
582 |
awaitTermination(t2, MEDIUM_DELAY_MS); |
awaitTermination(t2); |
|
checkCancelled(task); |
|
583 |
} |
} |
584 |
|
|
585 |
/** |
/** |
586 |
* Cancelling a task causes get in another thread to throw |
* Cancelling a task causes timed get in another thread to throw |
587 |
* CancellationException |
* CancellationException |
588 |
*/ |
*/ |
589 |
public void testGet_Cancellation() throws InterruptedException { |
public void testTimedGet_Cancellation() { |
590 |
final CountDownLatch threadStarted = new CountDownLatch(2); |
for (final boolean mayInterruptIfRunning : |
591 |
final FutureTask task = |
new boolean[] { true, false }) { |
592 |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
final CountDownLatch pleaseCancel = new CountDownLatch(3); |
593 |
|
final CountDownLatch cancelled = new CountDownLatch(1); |
594 |
|
final PublicFutureTask task = |
595 |
|
new PublicFutureTask(new CheckedCallable<Object>() { |
596 |
public Object realCall() throws InterruptedException { |
public Object realCall() throws InterruptedException { |
597 |
threadStarted.countDown(); |
pleaseCancel.countDown(); |
598 |
Thread.sleep(LONG_DELAY_MS); |
if (mayInterruptIfRunning) { |
599 |
return Boolean.TRUE; |
try { |
600 |
|
delay(2*LONG_DELAY_MS); |
601 |
|
} catch (InterruptedException success) {} |
602 |
|
} else { |
603 |
|
await(cancelled); |
604 |
|
} |
605 |
|
return two; |
606 |
}}); |
}}); |
607 |
|
|
608 |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
609 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
610 |
threadStarted.countDown(); |
pleaseCancel.countDown(); |
611 |
task.get(); |
task.get(); |
612 |
}}; |
}}; |
613 |
Thread t2 = new Thread(task); |
Thread t2 = new ThreadShouldThrow(CancellationException.class) { |
614 |
|
public void realRun() throws Exception { |
615 |
|
pleaseCancel.countDown(); |
616 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
617 |
|
}}; |
618 |
t1.start(); |
t1.start(); |
619 |
t2.start(); |
t2.start(); |
620 |
threadStarted.await(); |
Thread t3 = newStartedThread(task); |
621 |
task.cancel(true); |
await(pleaseCancel); |
622 |
awaitTermination(t1, MEDIUM_DELAY_MS); |
checkIsRunning(task); |
623 |
awaitTermination(t2, MEDIUM_DELAY_MS); |
task.cancel(mayInterruptIfRunning); |
624 |
|
checkCancelled(task); |
625 |
|
awaitTermination(t1); |
626 |
|
awaitTermination(t2); |
627 |
|
cancelled.countDown(); |
628 |
|
awaitTermination(t3); |
629 |
|
assertEquals(1, task.runCount()); |
630 |
|
assertEquals(1, task.setCount()); |
631 |
|
assertEquals(0, task.setExceptionCount()); |
632 |
|
tryToConfuseDoneTask(task); |
633 |
checkCancelled(task); |
checkCancelled(task); |
634 |
} |
} |
635 |
|
} |
636 |
|
|
637 |
/** |
/** |
638 |
* A runtime exception in task causes get to throw ExecutionException |
* A runtime exception in task causes get to throw ExecutionException |
639 |
*/ |
*/ |
640 |
public void testGet_ExecutionException() throws InterruptedException { |
public void testGet_ExecutionException() throws InterruptedException { |
641 |
final FutureTask task = new FutureTask(new Callable() { |
final ArithmeticException e = new ArithmeticException(); |
642 |
|
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
643 |
public Object call() { |
public Object call() { |
644 |
return 5/0; |
throw e; |
645 |
}}); |
}}); |
646 |
|
|
647 |
task.run(); |
task.run(); |
648 |
|
assertEquals(1, task.runCount()); |
649 |
|
assertEquals(0, task.setCount()); |
650 |
|
assertEquals(1, task.setExceptionCount()); |
651 |
try { |
try { |
652 |
task.get(); |
task.get(); |
653 |
shouldThrow(); |
shouldThrow(); |
654 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
655 |
assertTrue(success.getCause() instanceof ArithmeticException); |
assertSame(e, success.getCause()); |
656 |
|
tryToConfuseDoneTask(task); |
657 |
checkCompletedAbnormally(task, success.getCause()); |
checkCompletedAbnormally(task, success.getCause()); |
658 |
} |
} |
659 |
} |
} |
662 |
* A runtime exception in task causes timed get to throw ExecutionException |
* A runtime exception in task causes timed get to throw ExecutionException |
663 |
*/ |
*/ |
664 |
public void testTimedGet_ExecutionException2() throws Exception { |
public void testTimedGet_ExecutionException2() throws Exception { |
665 |
final FutureTask task = new FutureTask(new Callable() { |
final ArithmeticException e = new ArithmeticException(); |
666 |
|
final PublicFutureTask task = new PublicFutureTask(new Callable() { |
667 |
public Object call() { |
public Object call() { |
668 |
return 5/0; |
throw e; |
669 |
}}); |
}}); |
670 |
|
|
671 |
task.run(); |
task.run(); |
672 |
try { |
try { |
673 |
task.get(SHORT_DELAY_MS, MILLISECONDS); |
task.get(LONG_DELAY_MS, MILLISECONDS); |
674 |
shouldThrow(); |
shouldThrow(); |
675 |
} catch (ExecutionException success) { |
} catch (ExecutionException success) { |
676 |
assertTrue(success.getCause() instanceof ArithmeticException); |
assertSame(e, success.getCause()); |
677 |
|
tryToConfuseDoneTask(task); |
678 |
checkCompletedAbnormally(task, success.getCause()); |
checkCompletedAbnormally(task, success.getCause()); |
679 |
} |
} |
680 |
} |
} |
681 |
|
|
|
|
|
682 |
/** |
/** |
683 |
* Interrupting a waiting get causes it to throw InterruptedException |
* get is interruptible |
684 |
*/ |
*/ |
685 |
public void testGet_InterruptedException() throws InterruptedException { |
public void testGet_interruptible() { |
686 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
687 |
final FutureTask task = new FutureTask(new NoOpCallable()); |
final FutureTask task = new FutureTask(new NoOpCallable()); |
688 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
Thread t = newStartedThread(new CheckedRunnable() { |
689 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
690 |
threadStarted.countDown(); |
Thread.currentThread().interrupt(); |
691 |
|
try { |
692 |
|
task.get(); |
693 |
|
shouldThrow(); |
694 |
|
} catch (InterruptedException success) {} |
695 |
|
assertFalse(Thread.interrupted()); |
696 |
|
|
697 |
|
pleaseInterrupt.countDown(); |
698 |
|
try { |
699 |
task.get(); |
task.get(); |
700 |
|
shouldThrow(); |
701 |
|
} catch (InterruptedException success) {} |
702 |
|
assertFalse(Thread.interrupted()); |
703 |
}}); |
}}); |
704 |
|
|
705 |
threadStarted.await(); |
await(pleaseInterrupt); |
706 |
t.interrupt(); |
t.interrupt(); |
707 |
awaitTermination(t, MEDIUM_DELAY_MS); |
awaitTermination(t); |
708 |
checkNotDone(task); |
checkNotDone(task); |
709 |
} |
} |
710 |
|
|
711 |
/** |
/** |
712 |
* Interrupting a waiting timed get causes it to throw InterruptedException |
* timed get is interruptible |
713 |
*/ |
*/ |
714 |
public void testTimedGet_InterruptedException2() throws InterruptedException { |
public void testTimedGet_interruptible() { |
715 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
716 |
final FutureTask task = new FutureTask(new NoOpCallable()); |
final FutureTask task = new FutureTask(new NoOpCallable()); |
717 |
Thread t = newStartedThread(new CheckedInterruptedRunnable() { |
Thread t = newStartedThread(new CheckedRunnable() { |
718 |
public void realRun() throws Exception { |
public void realRun() throws Exception { |
719 |
threadStarted.countDown(); |
Thread.currentThread().interrupt(); |
720 |
task.get(LONG_DELAY_MS, MILLISECONDS); |
try { |
721 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
722 |
|
shouldThrow(); |
723 |
|
} catch (InterruptedException success) {} |
724 |
|
assertFalse(Thread.interrupted()); |
725 |
|
|
726 |
|
pleaseInterrupt.countDown(); |
727 |
|
try { |
728 |
|
task.get(2*LONG_DELAY_MS, MILLISECONDS); |
729 |
|
shouldThrow(); |
730 |
|
} catch (InterruptedException success) {} |
731 |
|
assertFalse(Thread.interrupted()); |
732 |
}}); |
}}); |
733 |
|
|
734 |
threadStarted.await(); |
await(pleaseInterrupt); |
735 |
t.interrupt(); |
t.interrupt(); |
736 |
awaitTermination(t, MEDIUM_DELAY_MS); |
awaitTermination(t); |
737 |
checkNotDone(task); |
checkNotDone(task); |
738 |
} |
} |
739 |
|
|
741 |
* A timed out timed get throws TimeoutException |
* A timed out timed get throws TimeoutException |
742 |
*/ |
*/ |
743 |
public void testGet_TimeoutException() throws Exception { |
public void testGet_TimeoutException() throws Exception { |
744 |
|
FutureTask task = new FutureTask(new NoOpCallable()); |
745 |
|
long startTime = System.nanoTime(); |
746 |
try { |
try { |
747 |
|
task.get(timeoutMillis(), MILLISECONDS); |
748 |
|
shouldThrow(); |
749 |
|
} catch (TimeoutException success) { |
750 |
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
751 |
|
} |
752 |
|
} |
753 |
|
|
754 |
|
/** |
755 |
|
* timed get with null TimeUnit throws NullPointerException |
756 |
|
*/ |
757 |
|
public void testGet_NullTimeUnit() throws Exception { |
758 |
FutureTask task = new FutureTask(new NoOpCallable()); |
FutureTask task = new FutureTask(new NoOpCallable()); |
759 |
task.get(1, MILLISECONDS); |
long[] timeouts = { Long.MIN_VALUE, 0L, Long.MAX_VALUE }; |
760 |
|
|
761 |
|
for (long timeout : timeouts) { |
762 |
|
try { |
763 |
|
task.get(timeout, null); |
764 |
shouldThrow(); |
shouldThrow(); |
765 |
} catch (TimeoutException success) {} |
} catch (NullPointerException success) {} |
766 |
|
} |
767 |
|
|
768 |
|
task.run(); |
769 |
|
|
770 |
|
for (long timeout : timeouts) { |
771 |
|
try { |
772 |
|
task.get(timeout, null); |
773 |
|
shouldThrow(); |
774 |
|
} catch (NullPointerException success) {} |
775 |
|
} |
776 |
} |
} |
777 |
|
|
778 |
} |
} |