1 |
/* |
2 |
* Written by members of JCP JSR-166 Expert Group and released to the |
3 |
* public domain. Use, modify, and redistribute this code in any way |
4 |
* without acknowledgement. Other contributors include Andrew Wright, |
5 |
* Jeffrey Hayes, Pat Fischer, Mike Judd. |
6 |
*/ |
7 |
|
8 |
|
9 |
import junit.framework.*; |
10 |
import java.util.*; |
11 |
import java.util.concurrent.*; |
12 |
import java.math.BigInteger; |
13 |
|
14 |
public class ExecutorsTest extends JSR166TestCase{ |
15 |
public static void main(String[] args) { |
16 |
junit.textui.TestRunner.run (suite()); |
17 |
} |
18 |
public static Test suite() { |
19 |
return new TestSuite(ExecutorsTest.class); |
20 |
} |
21 |
|
22 |
private static final String TEST_STRING = "a test string"; |
23 |
|
24 |
private static class MyTask implements Runnable { |
25 |
public void run() { completed = true; } |
26 |
public boolean isCompleted() { return completed; } |
27 |
public void reset() { completed = false; } |
28 |
private boolean completed = false; |
29 |
} |
30 |
|
31 |
private static class StringTask implements Callable<String> { |
32 |
public String call() { return TEST_STRING; } |
33 |
} |
34 |
|
35 |
static class DirectExecutor implements Executor { |
36 |
public void execute(Runnable r) { |
37 |
r.run(); |
38 |
} |
39 |
} |
40 |
|
41 |
static class TimedCallable<T> implements Callable<T> { |
42 |
private final Executor exec; |
43 |
private final Callable<T> func; |
44 |
private final long msecs; |
45 |
|
46 |
TimedCallable(Executor exec, Callable<T> func, long msecs) { |
47 |
this.exec = exec; |
48 |
this.func = func; |
49 |
this.msecs = msecs; |
50 |
} |
51 |
|
52 |
public T call() throws Exception { |
53 |
Future<T> ftask = Executors.execute(exec, func); |
54 |
try { |
55 |
return ftask.get(msecs, TimeUnit.MILLISECONDS); |
56 |
} finally { |
57 |
ftask.cancel(true); |
58 |
} |
59 |
} |
60 |
} |
61 |
|
62 |
|
63 |
private static class Fib implements Callable<BigInteger> { |
64 |
private final BigInteger n; |
65 |
Fib(long n) { |
66 |
if (n < 0) throw new IllegalArgumentException("need non-negative arg, but got " + n); |
67 |
this.n = BigInteger.valueOf(n); |
68 |
} |
69 |
public BigInteger call() { |
70 |
BigInteger f1 = BigInteger.ONE; |
71 |
BigInteger f2 = f1; |
72 |
for (BigInteger i = BigInteger.ZERO; i.compareTo(n) < 0; i = i.add(BigInteger.ONE)) { |
73 |
BigInteger t = f1.add(f2); |
74 |
f1 = f2; |
75 |
f2 = t; |
76 |
} |
77 |
return f1; |
78 |
} |
79 |
}; |
80 |
|
81 |
/** |
82 |
* For use as ThreadFactory in constructors |
83 |
*/ |
84 |
static class MyThreadFactory implements ThreadFactory{ |
85 |
public Thread newThread(Runnable r){ |
86 |
return new Thread(r); |
87 |
} |
88 |
} |
89 |
|
90 |
/** |
91 |
* A newCachedThreadPool can execute runnables |
92 |
*/ |
93 |
public void testNewCachedThreadPool1() { |
94 |
ExecutorService e = Executors.newCachedThreadPool(); |
95 |
e.execute(new NoOpRunnable()); |
96 |
e.execute(new NoOpRunnable()); |
97 |
e.execute(new NoOpRunnable()); |
98 |
e.shutdown(); |
99 |
} |
100 |
|
101 |
/** |
102 |
* A newCachedThreadPool with given ThreadFactory can execute runnables |
103 |
*/ |
104 |
public void testNewCachedThreadPool2() { |
105 |
ExecutorService e = Executors.newCachedThreadPool(new MyThreadFactory()); |
106 |
e.execute(new NoOpRunnable()); |
107 |
e.execute(new NoOpRunnable()); |
108 |
e.execute(new NoOpRunnable()); |
109 |
e.shutdown(); |
110 |
} |
111 |
|
112 |
/** |
113 |
* A newCachedThreadPool with null ThreadFactory throws NPE |
114 |
*/ |
115 |
public void testNewCachedThreadPool3() { |
116 |
try { |
117 |
ExecutorService e = Executors.newCachedThreadPool(null); |
118 |
shouldThrow(); |
119 |
} |
120 |
catch(NullPointerException success) { |
121 |
} |
122 |
} |
123 |
|
124 |
|
125 |
/** |
126 |
* A new SingleThreadExecutor can execute runnables |
127 |
*/ |
128 |
public void testNewSingleThreadExecutor1() { |
129 |
ExecutorService e = Executors.newSingleThreadExecutor(); |
130 |
e.execute(new NoOpRunnable()); |
131 |
e.execute(new NoOpRunnable()); |
132 |
e.execute(new NoOpRunnable()); |
133 |
e.shutdown(); |
134 |
} |
135 |
|
136 |
/** |
137 |
* A new SingleThreadExecutor with given ThreadFactory can execute runnables |
138 |
*/ |
139 |
public void testNewSingleThreadExecutor2() { |
140 |
ExecutorService e = Executors.newSingleThreadExecutor(new MyThreadFactory()); |
141 |
e.execute(new NoOpRunnable()); |
142 |
e.execute(new NoOpRunnable()); |
143 |
e.execute(new NoOpRunnable()); |
144 |
e.shutdown(); |
145 |
} |
146 |
|
147 |
/** |
148 |
* A new SingleThreadExecutor with null ThreadFactory throws NPE |
149 |
*/ |
150 |
public void testNewSingleThreadExecutor3() { |
151 |
try { |
152 |
ExecutorService e = Executors.newSingleThreadExecutor(null); |
153 |
shouldThrow(); |
154 |
} |
155 |
catch(NullPointerException success) { |
156 |
} |
157 |
} |
158 |
|
159 |
/** |
160 |
* A new newFixedThreadPool can execute runnables |
161 |
*/ |
162 |
public void testNewFixedThreadPool1() { |
163 |
ExecutorService e = Executors.newFixedThreadPool(2); |
164 |
e.execute(new NoOpRunnable()); |
165 |
e.execute(new NoOpRunnable()); |
166 |
e.execute(new NoOpRunnable()); |
167 |
e.shutdown(); |
168 |
} |
169 |
|
170 |
/** |
171 |
* A new newFixedThreadPool with given ThreadFactory can execute runnables |
172 |
*/ |
173 |
public void testNewFixedThreadPool2() { |
174 |
ExecutorService e = Executors.newFixedThreadPool(2, new MyThreadFactory()); |
175 |
e.execute(new NoOpRunnable()); |
176 |
e.execute(new NoOpRunnable()); |
177 |
e.execute(new NoOpRunnable()); |
178 |
e.shutdown(); |
179 |
} |
180 |
|
181 |
/** |
182 |
* A new newFixedThreadPool with null ThreadFactory throws NPE |
183 |
*/ |
184 |
public void testNewFixedThreadPool3() { |
185 |
try { |
186 |
ExecutorService e = Executors.newFixedThreadPool(2, null); |
187 |
shouldThrow(); |
188 |
} |
189 |
catch(NullPointerException success) { |
190 |
} |
191 |
} |
192 |
|
193 |
/** |
194 |
* A new newFixedThreadPool with 0 threads throws IAE |
195 |
*/ |
196 |
public void testNewFixedThreadPool4() { |
197 |
try { |
198 |
ExecutorService e = Executors.newFixedThreadPool(0); |
199 |
shouldThrow(); |
200 |
} |
201 |
catch(IllegalArgumentException success) { |
202 |
} |
203 |
} |
204 |
|
205 |
/** |
206 |
* execute of runnable runs it to completion |
207 |
*/ |
208 |
public void testExecuteRunnable () { |
209 |
try { |
210 |
Executor e = new DirectExecutor(); |
211 |
MyTask task = new MyTask(); |
212 |
assertFalse(task.isCompleted()); |
213 |
Future<String> future = Executors.execute(e, task, TEST_STRING); |
214 |
String result = future.get(); |
215 |
assertTrue(task.isCompleted()); |
216 |
assertSame(TEST_STRING, result); |
217 |
} |
218 |
catch (ExecutionException ex) { |
219 |
unexpectedException(); |
220 |
} |
221 |
catch (InterruptedException ex) { |
222 |
unexpectedException(); |
223 |
} |
224 |
} |
225 |
|
226 |
/** |
227 |
* invoke of a runnable runs it to completion |
228 |
*/ |
229 |
public void testInvokeRunnable () { |
230 |
try { |
231 |
Executor e = new DirectExecutor(); |
232 |
MyTask task = new MyTask(); |
233 |
assertFalse(task.isCompleted()); |
234 |
Executors.invoke(e, task); |
235 |
assertTrue(task.isCompleted()); |
236 |
} |
237 |
catch (ExecutionException ex) { |
238 |
unexpectedException(); |
239 |
} |
240 |
catch (InterruptedException ex) { |
241 |
unexpectedException(); |
242 |
} |
243 |
} |
244 |
|
245 |
/** |
246 |
* execute of a callable runs it to completion |
247 |
*/ |
248 |
public void testExecuteCallable () { |
249 |
try { |
250 |
Executor e = new DirectExecutor(); |
251 |
Future<String> future = Executors.execute(e, new StringTask()); |
252 |
String result = future.get(); |
253 |
assertSame(TEST_STRING, result); |
254 |
} |
255 |
catch (ExecutionException ex) { |
256 |
unexpectedException(); |
257 |
} |
258 |
catch (InterruptedException ex) { |
259 |
unexpectedException(); |
260 |
} |
261 |
} |
262 |
|
263 |
/** |
264 |
* invoke of a collable runs it to completion |
265 |
*/ |
266 |
public void testInvokeCallable () { |
267 |
try { |
268 |
Executor e = new DirectExecutor(); |
269 |
String result = Executors.invoke(e, new StringTask()); |
270 |
|
271 |
assertSame(TEST_STRING, result); |
272 |
} |
273 |
catch (ExecutionException ex) { |
274 |
unexpectedException(); |
275 |
} |
276 |
catch (InterruptedException ex) { |
277 |
unexpectedException(); |
278 |
} |
279 |
} |
280 |
|
281 |
/** |
282 |
* execute with null executor throws NPE |
283 |
*/ |
284 |
public void testNullExecuteRunnable () { |
285 |
try { |
286 |
MyTask task = new MyTask(); |
287 |
assertFalse(task.isCompleted()); |
288 |
Future<String> future = Executors.execute(null, task, TEST_STRING); |
289 |
shouldThrow(); |
290 |
} |
291 |
catch (NullPointerException success) { |
292 |
} |
293 |
catch (Exception ex) { |
294 |
unexpectedException(); |
295 |
} |
296 |
} |
297 |
|
298 |
/** |
299 |
* execute with a null runnable throws NPE |
300 |
*/ |
301 |
public void testExecuteNullRunnable() { |
302 |
try { |
303 |
Executor e = new DirectExecutor(); |
304 |
MyTask task = null; |
305 |
Future<String> future = Executors.execute(e, task, TEST_STRING); |
306 |
shouldThrow(); |
307 |
} |
308 |
catch (NullPointerException success) { |
309 |
} |
310 |
catch (Exception ex) { |
311 |
unexpectedException(); |
312 |
} |
313 |
} |
314 |
|
315 |
/** |
316 |
* invoke of a null runnable throws NPE |
317 |
*/ |
318 |
public void testInvokeNullRunnable () { |
319 |
try { |
320 |
Executor e = new DirectExecutor(); |
321 |
MyTask task = null; |
322 |
Executors.invoke(e, task); |
323 |
shouldThrow(); |
324 |
} |
325 |
catch (NullPointerException success) { |
326 |
} |
327 |
catch (Exception ex) { |
328 |
unexpectedException(); |
329 |
} |
330 |
} |
331 |
|
332 |
/** |
333 |
* execute of a null callable throws NPE |
334 |
*/ |
335 |
public void testExecuteNullCallable () { |
336 |
try { |
337 |
Executor e = new DirectExecutor(); |
338 |
StringTask t = null; |
339 |
Future<String> future = Executors.execute(e, t); |
340 |
shouldThrow(); |
341 |
} |
342 |
catch (NullPointerException success) { |
343 |
} |
344 |
catch (Exception ex) { |
345 |
unexpectedException(); |
346 |
} |
347 |
} |
348 |
|
349 |
/** |
350 |
* invoke of a null callable throws NPE |
351 |
*/ |
352 |
public void testInvokeNullCallable () { |
353 |
try { |
354 |
Executor e = new DirectExecutor(); |
355 |
StringTask t = null; |
356 |
String result = Executors.invoke(e, t); |
357 |
shouldThrow(); |
358 |
} |
359 |
catch (NullPointerException success) { |
360 |
} |
361 |
catch (Exception ex) { |
362 |
unexpectedException(); |
363 |
} |
364 |
} |
365 |
|
366 |
/** |
367 |
* execute(Executor, Runnable) throws RejectedExecutionException |
368 |
* if saturated. |
369 |
*/ |
370 |
public void testExecute1() { |
371 |
ThreadPoolExecutor p = new ThreadPoolExecutor(1,1, SHORT_DELAY_MS, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(1)); |
372 |
try { |
373 |
|
374 |
for(int i = 0; i < 5; ++i){ |
375 |
Executors.execute(p, new MediumRunnable(), Boolean.TRUE); |
376 |
} |
377 |
shouldThrow(); |
378 |
} catch(RejectedExecutionException success){} |
379 |
joinPool(p); |
380 |
} |
381 |
|
382 |
/** |
383 |
* execute(Executor, Callable)throws RejectedExecutionException |
384 |
* if saturated. |
385 |
*/ |
386 |
public void testExecute2() { |
387 |
ThreadPoolExecutor p = new ThreadPoolExecutor(1,1, SHORT_DELAY_MS, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(1)); |
388 |
try { |
389 |
for(int i = 0; i < 5; ++i) { |
390 |
Executors.execute(p, new SmallCallable()); |
391 |
} |
392 |
shouldThrow(); |
393 |
} catch(RejectedExecutionException e){} |
394 |
joinPool(p); |
395 |
} |
396 |
|
397 |
|
398 |
/** |
399 |
* invoke(Executor, Runnable) throws InterruptedException if |
400 |
* caller interrupted. |
401 |
*/ |
402 |
public void testInterruptedInvoke() { |
403 |
final ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,SHORT_DELAY_MS, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(10)); |
404 |
Thread t = new Thread(new Runnable() { |
405 |
public void run() { |
406 |
try { |
407 |
Executors.invoke(p,new Runnable() { |
408 |
public void run() { |
409 |
try { |
410 |
Thread.sleep(MEDIUM_DELAY_MS); |
411 |
shouldThrow(); |
412 |
} catch(InterruptedException e){ |
413 |
} |
414 |
} |
415 |
}); |
416 |
} catch(InterruptedException success){ |
417 |
} catch(Exception e) { |
418 |
unexpectedException(); |
419 |
} |
420 |
|
421 |
} |
422 |
}); |
423 |
try { |
424 |
t.start(); |
425 |
Thread.sleep(SHORT_DELAY_MS); |
426 |
t.interrupt(); |
427 |
} catch(Exception e){ |
428 |
unexpectedException(); |
429 |
} |
430 |
joinPool(p); |
431 |
} |
432 |
|
433 |
/** |
434 |
* invoke(Executor, Runnable) throws ExecutionException if |
435 |
* runnable throws exception. |
436 |
*/ |
437 |
public void testInvoke3() { |
438 |
ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,SHORT_DELAY_MS, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(10)); |
439 |
try { |
440 |
Runnable r = new Runnable() { |
441 |
public void run() { |
442 |
int i = 5/0; |
443 |
} |
444 |
}; |
445 |
|
446 |
for(int i =0; i < 5; i++){ |
447 |
Executors.invoke(p,r); |
448 |
} |
449 |
|
450 |
shouldThrow(); |
451 |
} catch(ExecutionException success){ |
452 |
} catch(Exception e){ |
453 |
unexpectedException(); |
454 |
} |
455 |
joinPool(p); |
456 |
} |
457 |
|
458 |
|
459 |
|
460 |
/** |
461 |
* invoke(Executor, Callable) throws InterruptedException if |
462 |
* callable throws exception |
463 |
*/ |
464 |
public void testInvoke5() { |
465 |
final ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,SHORT_DELAY_MS, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(10)); |
466 |
|
467 |
final Callable c = new Callable() { |
468 |
public Object call() { |
469 |
try { |
470 |
Executors.invoke(p, new SmallCallable()); |
471 |
shouldThrow(); |
472 |
} catch(InterruptedException e){} |
473 |
catch(RejectedExecutionException e2){} |
474 |
catch(ExecutionException e3){} |
475 |
return Boolean.TRUE; |
476 |
} |
477 |
}; |
478 |
|
479 |
|
480 |
|
481 |
Thread t = new Thread(new Runnable() { |
482 |
public void run() { |
483 |
try { |
484 |
c.call(); |
485 |
} catch(Exception e){} |
486 |
} |
487 |
}); |
488 |
try { |
489 |
t.start(); |
490 |
Thread.sleep(SHORT_DELAY_MS); |
491 |
t.interrupt(); |
492 |
t.join(); |
493 |
} catch(InterruptedException e){ |
494 |
unexpectedException(); |
495 |
} |
496 |
|
497 |
joinPool(p); |
498 |
} |
499 |
|
500 |
/** |
501 |
* invoke(Executor, Callable) will throw ExecutionException |
502 |
* if callable throws exception |
503 |
*/ |
504 |
public void testInvoke6() { |
505 |
ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,SHORT_DELAY_MS, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(10)); |
506 |
|
507 |
try { |
508 |
Callable c = new Callable() { |
509 |
public Object call() { |
510 |
int i = 5/0; |
511 |
return Boolean.TRUE; |
512 |
} |
513 |
}; |
514 |
|
515 |
for(int i =0; i < 5; i++){ |
516 |
Executors.invoke(p,c); |
517 |
} |
518 |
|
519 |
shouldThrow(); |
520 |
} |
521 |
catch(ExecutionException success){ |
522 |
} catch(Exception e) { |
523 |
unexpectedException(); |
524 |
} |
525 |
joinPool(p); |
526 |
} |
527 |
|
528 |
|
529 |
|
530 |
/** |
531 |
* timeouts from execute will time out if they compute too long. |
532 |
*/ |
533 |
public void testTimedCallable() { |
534 |
int N = 10000; |
535 |
ExecutorService executor = Executors.newSingleThreadExecutor(); |
536 |
List<Callable<BigInteger>> tasks = new ArrayList<Callable<BigInteger>>(N); |
537 |
try { |
538 |
long startTime = System.currentTimeMillis(); |
539 |
|
540 |
long i = 0; |
541 |
while (tasks.size() < N) { |
542 |
tasks.add(new TimedCallable<BigInteger>(executor, new Fib(i), 1)); |
543 |
i += 10; |
544 |
} |
545 |
|
546 |
int iters = 0; |
547 |
BigInteger sum = BigInteger.ZERO; |
548 |
for (Iterator<Callable<BigInteger>> it = tasks.iterator(); it.hasNext();) { |
549 |
try { |
550 |
++iters; |
551 |
sum = sum.add(it.next().call()); |
552 |
} |
553 |
catch (TimeoutException success) { |
554 |
assertTrue(iters > 0); |
555 |
return; |
556 |
} |
557 |
catch (Exception e) { |
558 |
unexpectedException(); |
559 |
} |
560 |
} |
561 |
// if by chance we didn't ever time out, total time must be small |
562 |
long elapsed = System.currentTimeMillis() - startTime; |
563 |
assertTrue(elapsed < N); |
564 |
} |
565 |
finally { |
566 |
joinPool(executor); |
567 |
} |
568 |
} |
569 |
|
570 |
|
571 |
|
572 |
|
573 |
} |