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 TestCase{ |
15 |
|
16 |
public static void main(String[] args) { |
17 |
junit.textui.TestRunner.run (suite()); |
18 |
} |
19 |
|
20 |
|
21 |
public static Test suite() { |
22 |
return new TestSuite(ExecutorsTest.class); |
23 |
} |
24 |
|
25 |
private static long SHORT_DELAY_MS = 100; |
26 |
private static long MEDIUM_DELAY_MS = 1000; |
27 |
private static long LONG_DELAY_MS = 10000; |
28 |
|
29 |
class SleepRun implements Runnable { |
30 |
public void run() { |
31 |
try{ |
32 |
Thread.sleep(MEDIUM_DELAY_MS); |
33 |
} catch(InterruptedException e){ |
34 |
fail("unexpected exception"); |
35 |
} |
36 |
} |
37 |
} |
38 |
|
39 |
|
40 |
class SleepCall implements Callable { |
41 |
public Object call(){ |
42 |
try{ |
43 |
Thread.sleep(MEDIUM_DELAY_MS); |
44 |
}catch(InterruptedException e){ |
45 |
fail("unexpected exception"); |
46 |
} |
47 |
return Boolean.TRUE; |
48 |
} |
49 |
} |
50 |
|
51 |
|
52 |
|
53 |
/** |
54 |
* Test to verify execute(Executor, Runnable) will throw |
55 |
* RejectedExecutionException Attempting to execute a runnable on |
56 |
* a full ThreadPool will cause such an exception here, up to 5 |
57 |
* runnables are attempted on a pool capable on handling one |
58 |
* until it throws an exception |
59 |
*/ |
60 |
public void testExecute1(){ |
61 |
ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,100L, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(1)); |
62 |
try{ |
63 |
|
64 |
for(int i = 0; i < 5; ++i){ |
65 |
Executors.execute(p, new SleepRun(), Boolean.TRUE); |
66 |
} |
67 |
fail("should throw"); |
68 |
} catch(RejectedExecutionException success){} |
69 |
p.shutdownNow(); |
70 |
} |
71 |
|
72 |
/** |
73 |
* Test to verify execute(Executor, Callable) will throw |
74 |
* RejectedExecutionException Attempting to execute a callable on |
75 |
* a full ThreadPool will cause such an exception here, up to 5 |
76 |
* runnables are attempted on a pool capable on handling one |
77 |
* until it throws an exception |
78 |
*/ |
79 |
public void testExecute2(){ |
80 |
ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,100L, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(1)); |
81 |
try{ |
82 |
for(int i = 0; i < 5; ++i) { |
83 |
Executors.execute(p, new SleepCall()); |
84 |
} |
85 |
fail("should throw"); |
86 |
}catch(RejectedExecutionException e){} |
87 |
p.shutdownNow(); |
88 |
} |
89 |
|
90 |
|
91 |
/** |
92 |
* Test to verify invoke(Executor, Runnable) throws InterruptedException |
93 |
* A single use of invoke starts that will wait long enough |
94 |
* for the invoking thread to be interrupted |
95 |
*/ |
96 |
public void testInvoke2(){ |
97 |
final ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,100L,TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(10)); |
98 |
Thread t = new Thread(new Runnable() { |
99 |
public void run(){ |
100 |
try{ |
101 |
Executors.invoke(p,new Runnable(){ |
102 |
public void run(){ |
103 |
try{ |
104 |
Thread.sleep(MEDIUM_DELAY_MS); |
105 |
fail("should throw"); |
106 |
}catch(InterruptedException e){ |
107 |
} |
108 |
} |
109 |
}); |
110 |
} catch(InterruptedException success){ |
111 |
} catch(Exception e) { |
112 |
fail("unexpected exception"); |
113 |
} |
114 |
|
115 |
} |
116 |
}); |
117 |
try{ |
118 |
t.start(); |
119 |
Thread.sleep(SHORT_DELAY_MS); |
120 |
t.interrupt(); |
121 |
}catch(Exception e){ |
122 |
fail("unexpected exception"); |
123 |
} |
124 |
p.shutdownNow(); |
125 |
} |
126 |
|
127 |
/** |
128 |
* Test to verify invoke(Executor, Runnable) will throw |
129 |
* ExecutionException An ExecutionException occurs when the |
130 |
* underlying Runnable throws an exception, here the |
131 |
* DivideByZeroException will cause an ExecutionException |
132 |
*/ |
133 |
public void testInvoke3(){ |
134 |
ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,100L,TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(10)); |
135 |
try{ |
136 |
Runnable r = new Runnable(){ |
137 |
public void run(){ |
138 |
int i = 5/0; |
139 |
} |
140 |
}; |
141 |
|
142 |
for(int i =0; i < 5; i++){ |
143 |
Executors.invoke(p,r); |
144 |
} |
145 |
|
146 |
fail("should throw"); |
147 |
} catch(ExecutionException success){ |
148 |
} catch(Exception e){ |
149 |
fail("should throw EE"); |
150 |
} |
151 |
p.shutdownNow(); |
152 |
} |
153 |
|
154 |
|
155 |
|
156 |
/** |
157 |
* Test to verify invoke(Executor, Callable) throws |
158 |
* InterruptedException A single use of invoke starts that will |
159 |
* wait long enough for the invoking thread to be interrupted |
160 |
*/ |
161 |
public void testInvoke5(){ |
162 |
final ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,100L,TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(10)); |
163 |
|
164 |
final Callable c = new Callable(){ |
165 |
public Object call(){ |
166 |
try{ |
167 |
Executors.invoke(p, new SleepCall()); |
168 |
fail("should throw"); |
169 |
}catch(InterruptedException e){} |
170 |
catch(RejectedExecutionException e2){} |
171 |
catch(ExecutionException e3){} |
172 |
return Boolean.TRUE; |
173 |
} |
174 |
}; |
175 |
|
176 |
|
177 |
|
178 |
Thread t = new Thread(new Runnable(){ |
179 |
public void run(){ |
180 |
try{ |
181 |
c.call(); |
182 |
}catch(Exception e){} |
183 |
} |
184 |
}); |
185 |
try{ |
186 |
t.start(); |
187 |
Thread.sleep(SHORT_DELAY_MS); |
188 |
t.interrupt(); |
189 |
t.join(); |
190 |
}catch(InterruptedException e){ |
191 |
fail("unexpected exception"); |
192 |
} |
193 |
|
194 |
p.shutdownNow(); |
195 |
} |
196 |
|
197 |
/** |
198 |
* Test to verify invoke(Executor, Callable) will throw ExecutionException |
199 |
* An ExecutionException occurs when the underlying Runnable throws |
200 |
* an exception, here the DivideByZeroException will cause an ExecutionException |
201 |
*/ |
202 |
public void testInvoke6(){ |
203 |
ThreadPoolExecutor p = new ThreadPoolExecutor(1,1,100L,TimeUnit.MILLISECONDS, new ArrayBlockingQueue<Runnable>(10)); |
204 |
|
205 |
try{ |
206 |
Callable c = new Callable(){ |
207 |
public Object call(){ |
208 |
int i = 5/0; |
209 |
return Boolean.TRUE; |
210 |
} |
211 |
}; |
212 |
|
213 |
for(int i =0; i < 5; i++){ |
214 |
Executors.invoke(p,c); |
215 |
} |
216 |
|
217 |
fail("should throw"); |
218 |
}catch(RejectedExecutionException e){} |
219 |
catch(InterruptedException e2){} |
220 |
catch(ExecutionException e3){} |
221 |
p.shutdownNow(); |
222 |
} |
223 |
|
224 |
public void testExecuteRunnable () { |
225 |
try { |
226 |
Executor e = new DirectExecutor(); |
227 |
Task task = new Task(); |
228 |
|
229 |
assertFalse("task should not be complete", task.isCompleted()); |
230 |
|
231 |
Future<String> future = Executors.execute(e, task, TEST_STRING); |
232 |
String result = future.get(); |
233 |
|
234 |
assertTrue("task should be complete", task.isCompleted()); |
235 |
assertSame("should return test string", TEST_STRING, result); |
236 |
} |
237 |
catch (ExecutionException ex) { |
238 |
fail("Unexpected exception"); |
239 |
} |
240 |
catch (InterruptedException ex) { |
241 |
fail("Unexpected exception"); |
242 |
} |
243 |
} |
244 |
|
245 |
public void testInvokeRunnable () { |
246 |
try { |
247 |
Executor e = new DirectExecutor(); |
248 |
Task task = new Task(); |
249 |
|
250 |
assertFalse("task should not be complete", task.isCompleted()); |
251 |
|
252 |
Executors.invoke(e, task); |
253 |
|
254 |
assertTrue("task should be complete", task.isCompleted()); |
255 |
} |
256 |
catch (ExecutionException ex) { |
257 |
fail("Unexpected exception"); |
258 |
} |
259 |
catch (InterruptedException ex) { |
260 |
fail("Unexpected exception"); |
261 |
} |
262 |
} |
263 |
|
264 |
public void testExecuteCallable () { |
265 |
try { |
266 |
Executor e = new DirectExecutor(); |
267 |
Future<String> future = Executors.execute(e, new StringTask()); |
268 |
String result = future.get(); |
269 |
|
270 |
assertSame("should return test string", TEST_STRING, result); |
271 |
} |
272 |
catch (ExecutionException ex) { |
273 |
fail("Unexpected exception"); |
274 |
} |
275 |
catch (InterruptedException ex) { |
276 |
fail("Unexpected exception"); |
277 |
} |
278 |
} |
279 |
|
280 |
public void testInvokeCallable () { |
281 |
try { |
282 |
Executor e = new DirectExecutor(); |
283 |
String result = Executors.invoke(e, new StringTask()); |
284 |
|
285 |
assertSame("should return test string", TEST_STRING, result); |
286 |
} |
287 |
catch (ExecutionException ex) { |
288 |
fail("Unexpected exception" ); |
289 |
} |
290 |
catch (InterruptedException ex) { |
291 |
fail("Unexpected exception"); |
292 |
} |
293 |
} |
294 |
|
295 |
private static final String TEST_STRING = "a test string"; |
296 |
|
297 |
private static class Task implements Runnable { |
298 |
public void run() { completed = true; } |
299 |
public boolean isCompleted() { return completed; } |
300 |
public void reset() { completed = false; } |
301 |
private boolean completed = false; |
302 |
} |
303 |
|
304 |
private static class StringTask implements Callable<String> { |
305 |
public String call() { return TEST_STRING; } |
306 |
} |
307 |
|
308 |
static class DirectExecutor implements Executor { |
309 |
public void execute(Runnable r) { |
310 |
r.run(); |
311 |
} |
312 |
} |
313 |
|
314 |
/** |
315 |
* Check that timeouts from execute will time out if they compute |
316 |
* too long. |
317 |
*/ |
318 |
|
319 |
public void testTimedCallable() { |
320 |
int N = 10000; |
321 |
ExecutorService executor = Executors.newSingleThreadExecutor(); |
322 |
List<Callable<BigInteger>> tasks = new ArrayList<Callable<BigInteger>>(N); |
323 |
try { |
324 |
long startTime = System.currentTimeMillis(); |
325 |
|
326 |
long i = 0; |
327 |
while (tasks.size() < N) { |
328 |
tasks.add(new TimedCallable<BigInteger>(executor, new Fib(i), 1)); |
329 |
i += 10; |
330 |
} |
331 |
|
332 |
int iters = 0; |
333 |
BigInteger sum = BigInteger.ZERO; |
334 |
for (Iterator<Callable<BigInteger>> it = tasks.iterator(); it.hasNext();) { |
335 |
try { |
336 |
++iters; |
337 |
sum = sum.add(it.next().call()); |
338 |
} |
339 |
catch (TimeoutException success) { |
340 |
assertTrue(iters > 0); |
341 |
return; |
342 |
} |
343 |
catch (Exception e) { |
344 |
fail("unexpected exception: " + e); |
345 |
} |
346 |
} |
347 |
// if by chance we didn't ever time out, total time must be small |
348 |
long elapsed = System.currentTimeMillis() - startTime; |
349 |
assertTrue(elapsed < N); |
350 |
} |
351 |
finally { |
352 |
executor.shutdownNow(); |
353 |
} |
354 |
} |
355 |
|
356 |
|
357 |
static class TimedCallable<T> implements Callable<T> { |
358 |
private final Executor exec; |
359 |
private final Callable<T> func; |
360 |
private final long msecs; |
361 |
|
362 |
TimedCallable(Executor exec, Callable<T> func, long msecs) { |
363 |
this.exec = exec; |
364 |
this.func = func; |
365 |
this.msecs = msecs; |
366 |
} |
367 |
|
368 |
public T call() throws Exception { |
369 |
Future<T> ftask = Executors.execute(exec, func); |
370 |
try { |
371 |
return ftask.get(msecs, TimeUnit.MILLISECONDS); |
372 |
} finally { |
373 |
ftask.cancel(true); |
374 |
} |
375 |
} |
376 |
} |
377 |
|
378 |
|
379 |
private static class Fib implements Callable<BigInteger> { |
380 |
private final BigInteger n; |
381 |
Fib(long n) { |
382 |
if (n < 0) throw new IllegalArgumentException("need non-negative arg, but got " + n); |
383 |
this.n = BigInteger.valueOf(n); |
384 |
} |
385 |
public BigInteger call() { |
386 |
BigInteger f1 = BigInteger.ONE; |
387 |
BigInteger f2 = f1; |
388 |
for (BigInteger i = BigInteger.ZERO; i.compareTo(n) < 0; i = i.add(BigInteger.ONE)) { |
389 |
BigInteger t = f1.add(f2); |
390 |
f1 = f2; |
391 |
f2 = t; |
392 |
} |
393 |
return f1; |
394 |
} |
395 |
}; |
396 |
|
397 |
|
398 |
|
399 |
} |