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root/jsr166/jsr166/src/test/tck/JSR166TestCase.java

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.23 by dl, Tue Dec 28 16:15:59 2004 UTC vs.
Revision 1.80 by jsr166, Fri May 13 21:48:58 2011 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	<	import java.util.*;
10	>	import java.io.ByteArrayInputStream;
11	>	import java.io.ByteArrayOutputStream;
12	>	import java.io.ObjectInputStream;
13	>	import java.io.ObjectOutputStream;
14	>	import java.util.Arrays;
15	>	import java.util.NoSuchElementException;
16	>	import java.util.PropertyPermission;
17		import java.util.concurrent.*;
18	<	import java.io.*;
19	<	import java.security.*;
18	>	import java.util.concurrent.atomic.AtomicReference;
19	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
21	>	import java.security.CodeSource;
22	>	import java.security.Permission;
23	>	import java.security.PermissionCollection;
24	>	import java.security.Permissions;
25	>	import java.security.Policy;
26	>	import java.security.ProtectionDomain;
27	>	import java.security.SecurityPermission;
28
29		/**
30		* Base class for JSR166 Junit TCK tests.  Defines some constants,
31		* utility methods and classes, as well as a simple framework for
32		* helping to make sure that assertions failing in generated threads
33		* cause the associated test that generated them to itself fail (which
34	<	* JUnit doe not otherwise arrange).  The rules for creating such
34	>	* JUnit does not otherwise arrange).  The rules for creating such
35		* tests are:
36		*
37		* <ol>
38		*
39		* <li> All assertions in code running in generated threads must use
40	<	* the forms {@link #threadFail} , {@link #threadAssertTrue} {@link
40	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
41		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
42	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
42	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
43		* particularly recommended) for other code to use these forms too.
44		* Only the most typically used JUnit assertion methods are defined
45		* this way, but enough to live with.</li>
46		*
47		* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
48	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
48	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
49		* them. These methods are used to clear and check for thread
50		* assertion failures.</li>
51		*
52	<	* <li>All delays and timeouts must use one of the constants <tt>
53	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
54	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
52	>	* <li>All delays and timeouts must use one of the constants {@code
53	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
54	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
55		* discriminable from zero time, and always allows enough time for the
56		* small amounts of computation (creating a thread, calling a few
57		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
58		* is always discriminable as larger than SHORT and smaller than
59		* MEDIUM.  And so on. These constants are set to conservative values,
60		* but even so, if there is ever any doubt, they can all be increased
61	<	* in one spot to rerun tests on slower platforms</li>
61	>	* in one spot to rerun tests on slower platforms.</li>
62		*
63		* <li> All threads generated must be joined inside each test case
64	<	* method (or <tt>fail</tt> to do so) before returning from the
65	<	* method. The <tt> joinPool</tt> method can be used to do this when
64	>	* method (or {@code fail} to do so) before returning from the
65	>	* method. The {@code joinPool} method can be used to do this when
66		* using Executors.</li>
67		*
68		* </ol>
#	Line 63 | Line 77 | import java.security.*;
77		* "normal" behaviors differ significantly. And sometimes testcases
78		* cover multiple methods when they cannot be tested in
79		* isolation.</li>
80	<	*
80	>	*
81		* <li> The documentation style for testcases is to provide as javadoc
82		* a simple sentence or two describing the property that the testcase
83		* method purports to test. The javadocs do not say anything about how
#	Line 80 | Line 94 | import java.security.*;
94		* any particular package to simplify things for people integrating
95		* them in TCK test suites.</li>
96		*
97	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
97	>	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
98		* runs all JSR166 unit tests.</li>
99		*
100		* </ul>
101		*/
102		public class JSR166TestCase extends TestCase {
103	+	private static final boolean useSecurityManager =
104	+	Boolean.getBoolean("jsr166.useSecurityManager");
105	+
106	+	protected static final boolean expensiveTests =
107	+	Boolean.getBoolean("jsr166.expensiveTests");
108	+
109	+	/**
110	+	* If true, report on stdout all "slow" tests, that is, ones that
111	+	* take more than profileThreshold milliseconds to execute.
112	+	*/
113	+	private static final boolean profileTests =
114	+	Boolean.getBoolean("jsr166.profileTests");
115	+
116	+	/**
117	+	* The number of milliseconds that tests are permitted for
118	+	* execution without being reported, when profileTests is set.
119	+	*/
120	+	private static final long profileThreshold =
121	+	Long.getLong("jsr166.profileThreshold", 100);
122	+
123	+	protected void runTest() throws Throwable {
124	+	if (profileTests)
125	+	runTestProfiled();
126	+	else
127	+	super.runTest();
128	+	}
129	+
130	+	protected void runTestProfiled() throws Throwable {
131	+	long t0 = System.nanoTime();
132	+	try {
133	+	super.runTest();
134	+	} finally {
135	+	long elapsedMillis =
136	+	(System.nanoTime() - t0) / (1000L * 1000L);
137	+	if (elapsedMillis >= profileThreshold)
138	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
139	+	}
140	+	}
141	+
142		/**
143		* Runs all JSR166 unit tests using junit.textui.TestRunner
144	<	*/
145	<	public static void main (String[] args) {
146	<	int iters = 1;
147	<	if (args.length > 0)
148	<	iters = Integer.parseInt(args[0]);
144	>	*/
145	>	public static void main(String[] args) {
146	>	if (useSecurityManager) {
147	>	System.err.println("Setting a permissive security manager");
148	>	Policy.setPolicy(permissivePolicy());
149	>	System.setSecurityManager(new SecurityManager());
150	>	}
151	>	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
152	>
153		Test s = suite();
154		for (int i = 0; i < iters; ++i) {
155	<	junit.textui.TestRunner.run (s);
155	>	junit.textui.TestRunner.run(s);
156		System.gc();
157		System.runFinalization();
158		}
159		System.exit(0);
160		}
161
162	<	/**
163	<	* Collects all JSR166 unit tests as one suite
164	<	*/
165	<	public static Test suite ( ) {
166	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
167	<
168	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
169	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
170	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
171	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
115	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
116	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
117	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
118	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
119	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
120	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
121	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
122	<	suite.addTest(new TestSuite(AtomicLongTest.class));
123	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
124	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
125	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
126	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
127	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
128	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
129	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
130	<	suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
131	<	suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
132	<	suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
133	<	suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
134	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
135	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
136	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
137	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
138	<	suite.addTest(new TestSuite(DelayQueueTest.class));
139	<	suite.addTest(new TestSuite(ExchangerTest.class));
140	<	suite.addTest(new TestSuite(ExecutorsTest.class));
141	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
142	<	suite.addTest(new TestSuite(FutureTaskTest.class));
143	<	suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
144	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
145	<	suite.addTest(new TestSuite(LinkedListTest.class));
146	<	suite.addTest(new TestSuite(LockSupportTest.class));
147	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
148	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
149	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
150	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
151	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
152	<	suite.addTest(new TestSuite(SemaphoreTest.class));
153	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
154	<	suite.addTest(new TestSuite(SystemTest.class));
155	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
156	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
157	<	suite.addTest(new TestSuite(ThreadTest.class));
158	<	suite.addTest(new TestSuite(TreeMapTest.class));
159	<	suite.addTest(new TestSuite(TreeSetTest.class));
160	<
162	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
163	>	TestSuite suite = new TestSuite();
164	>	for (Object suiteOrClass : suiteOrClasses) {
165	>	if (suiteOrClass instanceof TestSuite)
166	>	suite.addTest((TestSuite) suiteOrClass);
167	>	else if (suiteOrClass instanceof Class)
168	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
169	>	else
170	>	throw new ClassCastException("not a test suite or class");
171	>	}
172		return suite;
173		}
174
175	+	/**
176	+	* Collects all JSR166 unit tests as one suite.
177	+	*/
178	+	public static Test suite() {
179	+	return newTestSuite(
180	+	ForkJoinPoolTest.suite(),
181	+	ForkJoinTaskTest.suite(),
182	+	RecursiveActionTest.suite(),
183	+	RecursiveTaskTest.suite(),
184	+	LinkedTransferQueueTest.suite(),
185	+	PhaserTest.suite(),
186	+	ThreadLocalRandomTest.suite(),
187	+	AbstractExecutorServiceTest.suite(),
188	+	AbstractQueueTest.suite(),
189	+	AbstractQueuedSynchronizerTest.suite(),
190	+	AbstractQueuedLongSynchronizerTest.suite(),
191	+	ArrayBlockingQueueTest.suite(),
192	+	ArrayDequeTest.suite(),
193	+	AtomicBooleanTest.suite(),
194	+	AtomicIntegerArrayTest.suite(),
195	+	AtomicIntegerFieldUpdaterTest.suite(),
196	+	AtomicIntegerTest.suite(),
197	+	AtomicLongArrayTest.suite(),
198	+	AtomicLongFieldUpdaterTest.suite(),
199	+	AtomicLongTest.suite(),
200	+	AtomicMarkableReferenceTest.suite(),
201	+	AtomicReferenceArrayTest.suite(),
202	+	AtomicReferenceFieldUpdaterTest.suite(),
203	+	AtomicReferenceTest.suite(),
204	+	AtomicStampedReferenceTest.suite(),
205	+	ConcurrentHashMapTest.suite(),
206	+	ConcurrentLinkedDequeTest.suite(),
207	+	ConcurrentLinkedQueueTest.suite(),
208	+	ConcurrentSkipListMapTest.suite(),
209	+	ConcurrentSkipListSubMapTest.suite(),
210	+	ConcurrentSkipListSetTest.suite(),
211	+	ConcurrentSkipListSubSetTest.suite(),
212	+	CopyOnWriteArrayListTest.suite(),
213	+	CopyOnWriteArraySetTest.suite(),
214	+	CountDownLatchTest.suite(),
215	+	CyclicBarrierTest.suite(),
216	+	DelayQueueTest.suite(),
217	+	EntryTest.suite(),
218	+	ExchangerTest.suite(),
219	+	ExecutorsTest.suite(),
220	+	ExecutorCompletionServiceTest.suite(),
221	+	FutureTaskTest.suite(),
222	+	LinkedBlockingDequeTest.suite(),
223	+	LinkedBlockingQueueTest.suite(),
224	+	LinkedListTest.suite(),
225	+	LockSupportTest.suite(),
226	+	PriorityBlockingQueueTest.suite(),
227	+	PriorityQueueTest.suite(),
228	+	ReentrantLockTest.suite(),
229	+	ReentrantReadWriteLockTest.suite(),
230	+	ScheduledExecutorTest.suite(),
231	+	ScheduledExecutorSubclassTest.suite(),
232	+	SemaphoreTest.suite(),
233	+	SynchronousQueueTest.suite(),
234	+	SystemTest.suite(),
235	+	ThreadLocalTest.suite(),
236	+	ThreadPoolExecutorTest.suite(),
237	+	ThreadPoolExecutorSubclassTest.suite(),
238	+	ThreadTest.suite(),
239	+	TimeUnitTest.suite(),
240	+	TreeMapTest.suite(),
241	+	TreeSetTest.suite(),
242	+	TreeSubMapTest.suite(),
243	+	TreeSubSetTest.suite());
244	+	}
245	+
246
247		public static long SHORT_DELAY_MS;
248		public static long SMALL_DELAY_MS;
#	Line 169 | Line 251 | public class JSR166TestCase extends Test
251
252
253		/**
254	<	* Return the shortest timed delay. This could
254	>	* Returns the shortest timed delay. This could
255		* be reimplemented to use for example a Property.
256	<	*/
256	>	*/
257		protected long getShortDelay() {
258		return 50;
259		}
260
261
262		/**
263	<	* Set delays as multiples of SHORT_DELAY.
263	>	* Sets delays as multiples of SHORT_DELAY.
264		*/
265	<	protected  void setDelays() {
265	>	protected void setDelays() {
266		SHORT_DELAY_MS = getShortDelay();
267	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
267	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
268		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
269	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
269	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
270		}
271
272		/**
273	<	* Flag set true if any threadAssert methods fail
273	>	* The first exception encountered if any threadAssertXXX method fails.
274		*/
275	<	volatile boolean threadFailed;
275	>	private final AtomicReference<Throwable> threadFailure
276	>	= new AtomicReference<Throwable>(null);
277
278		/**
279	<	* Initialize test to indicate that no thread assertions have failed
279	>	* Records an exception so that it can be rethrown later in the test
280	>	* harness thread, triggering a test case failure.  Only the first
281	>	* failure is recorded; subsequent calls to this method from within
282	>	* the same test have no effect.
283		*/
284	<	public void setUp() {
284	>	public void threadRecordFailure(Throwable t) {
285	>	threadFailure.compareAndSet(null, t);
286	>	}
287	>
288	>	public void setUp() {
289		setDelays();
200	–	threadFailed = false;
290		}
291
292		/**
293	<	* Trigger test case failure if any thread assertions have failed
293	>	* Triggers test case failure if any thread assertions have failed,
294	>	* by rethrowing, in the test harness thread, any exception recorded
295	>	* earlier by threadRecordFailure.
296		*/
297	<	public void tearDown() {
298	<	assertFalse(threadFailed);
297	>	public void tearDown() throws Exception {
298	>	Throwable t = threadFailure.getAndSet(null);
299	>	if (t != null) {
300	>	if (t instanceof Error)
301	>	throw (Error) t;
302	>	else if (t instanceof RuntimeException)
303	>	throw (RuntimeException) t;
304	>	else if (t instanceof Exception)
305	>	throw (Exception) t;
306	>	else {
307	>	AssertionFailedError afe =
308	>	new AssertionFailedError(t.toString());
309	>	afe.initCause(t);
310	>	throw afe;
311	>	}
312	>	}
313		}
314
315		/**
316	<	* Fail, also setting status to indicate current testcase should fail
317	<	*/
316	>	* Just like fail(reason), but additionally recording (using
317	>	* threadRecordFailure) any AssertionFailedError thrown, so that
318	>	* the current testcase will fail.
319	>	*/
320		public void threadFail(String reason) {
321	<	threadFailed = true;
322	<	fail(reason);
321	>	try {
322	>	fail(reason);
323	>	} catch (AssertionFailedError t) {
324	>	threadRecordFailure(t);
325	>	fail(reason);
326	>	}
327		}
328
329		/**
330	<	* If expression not true, set status to indicate current testcase
331	<	* should fail
332	<	*/
330	>	* Just like assertTrue(b), but additionally recording (using
331	>	* threadRecordFailure) any AssertionFailedError thrown, so that
332	>	* the current testcase will fail.
333	>	*/
334		public void threadAssertTrue(boolean b) {
335	<	if (!b) {
224	<	threadFailed = true;
335	>	try {
336		assertTrue(b);
337	+	} catch (AssertionFailedError t) {
338	+	threadRecordFailure(t);
339	+	throw t;
340		}
341		}
342
343		/**
344	<	* If expression not false, set status to indicate current testcase
345	<	* should fail
346	<	*/
344	>	* Just like assertFalse(b), but additionally recording (using
345	>	* threadRecordFailure) any AssertionFailedError thrown, so that
346	>	* the current testcase will fail.
347	>	*/
348		public void threadAssertFalse(boolean b) {
349	<	if (b) {
235	<	threadFailed = true;
349	>	try {
350		assertFalse(b);
351	+	} catch (AssertionFailedError t) {
352	+	threadRecordFailure(t);
353	+	throw t;
354		}
355		}
356
357		/**
358	<	* If argument not null, set status to indicate current testcase
359	<	* should fail
360	<	*/
358	>	* Just like assertNull(x), but additionally recording (using
359	>	* threadRecordFailure) any AssertionFailedError thrown, so that
360	>	* the current testcase will fail.
361	>	*/
362		public void threadAssertNull(Object x) {
363	<	if (x != null) {
246	<	threadFailed = true;
363	>	try {
364		assertNull(x);
365	+	} catch (AssertionFailedError t) {
366	+	threadRecordFailure(t);
367	+	throw t;
368		}
369		}
370
371		/**
372	<	* If arguments not equal, set status to indicate current testcase
373	<	* should fail
374	<	*/
372	>	* Just like assertEquals(x, y), but additionally recording (using
373	>	* threadRecordFailure) any AssertionFailedError thrown, so that
374	>	* the current testcase will fail.
375	>	*/
376		public void threadAssertEquals(long x, long y) {
377	<	if (x != y) {
257	<	threadFailed = true;
377	>	try {
378		assertEquals(x, y);
379	+	} catch (AssertionFailedError t) {
380	+	threadRecordFailure(t);
381	+	throw t;
382		}
383		}
384
385		/**
386	<	* If arguments not equal, set status to indicate current testcase
387	<	* should fail
388	<	*/
386	>	* Just like assertEquals(x, y), but additionally recording (using
387	>	* threadRecordFailure) any AssertionFailedError thrown, so that
388	>	* the current testcase will fail.
389	>	*/
390		public void threadAssertEquals(Object x, Object y) {
391	<	if (x != y && (x == null || !x.equals(y))) {
268	<	threadFailed = true;
391	>	try {
392		assertEquals(x, y);
393	+	} catch (AssertionFailedError t) {
394	+	threadRecordFailure(t);
395	+	throw t;
396	+	} catch (Throwable t) {
397	+	threadUnexpectedException(t);
398		}
399		}
400
401		/**
402	<	* threadFail with message "should throw exception"
403	<	*/
402	>	* Just like assertSame(x, y), but additionally recording (using
403	>	* threadRecordFailure) any AssertionFailedError thrown, so that
404	>	* the current testcase will fail.
405	>	*/
406	>	public void threadAssertSame(Object x, Object y) {
407	>	try {
408	>	assertSame(x, y);
409	>	} catch (AssertionFailedError t) {
410	>	threadRecordFailure(t);
411	>	throw t;
412	>	}
413	>	}
414	>
415	>	/**
416	>	* Calls threadFail with message "should throw exception".
417	>	*/
418		public void threadShouldThrow() {
419	<	threadFailed = true;
278	<	fail("should throw exception");
419	>	threadFail("should throw exception");
420		}
421
422		/**
423	<	* threadFail with message "Unexpected exception"
423	>	* Calls threadFail with message "should throw" + exceptionName.
424		*/
425	<	public void threadUnexpectedException() {
426	<	threadFailed = true;
286	<	fail("Unexpected exception");
425	>	public void threadShouldThrow(String exceptionName) {
426	>	threadFail("should throw " + exceptionName);
427		}
428
429	+	/**
430	+	* Records the given exception using {@link #threadRecordFailure},
431	+	* then rethrows the exception, wrapping it in an
432	+	* AssertionFailedError if necessary.
433	+	*/
434	+	public void threadUnexpectedException(Throwable t) {
435	+	threadRecordFailure(t);
436	+	t.printStackTrace();
437	+	if (t instanceof RuntimeException)
438	+	throw (RuntimeException) t;
439	+	else if (t instanceof Error)
440	+	throw (Error) t;
441	+	else {
442	+	AssertionFailedError afe =
443	+	new AssertionFailedError("unexpected exception: " + t);
444	+	t.initCause(t);
445	+	throw afe;
446	+	}
447	+	}
448
449		/**
450	<	* Wait out termination of a thread pool or fail doing so
450	>	* Delays, via Thread.sleep for the given millisecond delay, but
451	>	* if the sleep is shorter than specified, may re-sleep or yield
452	>	* until time elapses.
453	>	*/
454	>	public static void delay(long millis) throws InterruptedException {
455	>	long startTime = System.nanoTime();
456	>	long ns = millis * 1000 * 1000;
457	>	for (;;) {
458	>	if (millis > 0L)
459	>	Thread.sleep(millis);
460	>	else // too short to sleep
461	>	Thread.yield();
462	>	long d = ns - (System.nanoTime() - startTime);
463	>	if (d > 0L)
464	>	millis = d / (1000 * 1000);
465	>	else
466	>	break;
467	>	}
468	>	}
469	>
470	>	/**
471	>	* Waits out termination of a thread pool or fails doing so.
472		*/
473		public void joinPool(ExecutorService exec) {
474		try {
475		exec.shutdown();
476	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
477	<	} catch(SecurityException ok) {
476	>	assertTrue("ExecutorService did not terminate in a timely manner",
477	>	exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
478	>	} catch (SecurityException ok) {
479		// Allowed in case test doesn't have privs
480	<	} catch(InterruptedException ie) {
481	<	fail("Unexpected exception");
480	>	} catch (InterruptedException ie) {
481	>	fail("Unexpected InterruptedException");
482		}
483		}
484
485	+	/**
486	+	* Checks that thread does not terminate within the given millisecond delay.
487	+	*/
488	+	public void assertThreadStaysAlive(Thread thread, long millis) {
489	+	try {
490	+	// No need to optimize the failing case via Thread.join.
491	+	delay(millis);
492	+	assertTrue(thread.isAlive());
493	+	} catch (InterruptedException ie) {
494	+	fail("Unexpected InterruptedException");
495	+	}
496	+	}
497
498		/**
499	<	* fail with message "should throw exception"
500	<	*/
499	>	* Fails with message "should throw exception".
500	>	*/
501		public void shouldThrow() {
502		fail("Should throw exception");
503		}
504
505		/**
506	<	* fail with message "Unexpected exception"
506	>	* Fails with message "should throw " + exceptionName.
507		*/
508	<	public void unexpectedException() {
509	<	fail("Unexpected exception");
508	>	public void shouldThrow(String exceptionName) {
509	>	fail("Should throw " + exceptionName);
510		}
511
319	–
512		/**
513		* The number of elements to place in collections, arrays, etc.
514		*/
515	<	static final int SIZE = 20;
515	>	public static final int SIZE = 20;
516
517		// Some convenient Integer constants
518
519	<	static final Integer zero = new Integer(0);
520	<	static final Integer one = new Integer(1);
521	<	static final Integer two = new Integer(2);
522	<	static final Integer three  = new Integer(3);
523	<	static final Integer four  = new Integer(4);
524	<	static final Integer five  = new Integer(5);
525	<	static final Integer six = new Integer(6);
526	<	static final Integer seven = new Integer(7);
527	<	static final Integer eight = new Integer(8);
528	<	static final Integer nine = new Integer(9);
529	<	static final Integer m1  = new Integer(-1);
530	<	static final Integer m2  = new Integer(-2);
531	<	static final Integer m3  = new Integer(-3);
532	<	static final Integer m4 = new Integer(-4);
533	<	static final Integer m5 = new Integer(-5);
534	<	static final Integer m10 = new Integer(-10);
519	>	public static final Integer zero  = new Integer(0);
520	>	public static final Integer one   = new Integer(1);
521	>	public static final Integer two   = new Integer(2);
522	>	public static final Integer three = new Integer(3);
523	>	public static final Integer four  = new Integer(4);
524	>	public static final Integer five  = new Integer(5);
525	>	public static final Integer six   = new Integer(6);
526	>	public static final Integer seven = new Integer(7);
527	>	public static final Integer eight = new Integer(8);
528	>	public static final Integer nine  = new Integer(9);
529	>	public static final Integer m1  = new Integer(-1);
530	>	public static final Integer m2  = new Integer(-2);
531	>	public static final Integer m3  = new Integer(-3);
532	>	public static final Integer m4  = new Integer(-4);
533	>	public static final Integer m5  = new Integer(-5);
534	>	public static final Integer m6  = new Integer(-6);
535	>	public static final Integer m10 = new Integer(-10);
536	>
537	>
538	>	/**
539	>	* Runs Runnable r with a security policy that permits precisely
540	>	* the specified permissions.  If there is no current security
541	>	* manager, the runnable is run twice, both with and without a
542	>	* security manager.  We require that any security manager permit
543	>	* getPolicy/setPolicy.
544	>	*/
545	>	public void runWithPermissions(Runnable r, Permission... permissions) {
546	>	SecurityManager sm = System.getSecurityManager();
547	>	if (sm == null) {
548	>	r.run();
549	>	Policy savedPolicy = Policy.getPolicy();
550	>	try {
551	>	Policy.setPolicy(permissivePolicy());
552	>	System.setSecurityManager(new SecurityManager());
553	>	runWithPermissions(r, permissions);
554	>	} finally {
555	>	System.setSecurityManager(null);
556	>	Policy.setPolicy(savedPolicy);
557	>	}
558	>	} else {
559	>	Policy savedPolicy = Policy.getPolicy();
560	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
561	>	Policy.setPolicy(policy);
562	>
563	>	try {
564	>	r.run();
565	>	} finally {
566	>	policy.addPermission(new SecurityPermission("setPolicy"));
567	>	Policy.setPolicy(savedPolicy);
568	>	}
569	>	}
570	>	}
571
572	+	/**
573	+	* Runs a runnable without any permissions.
574	+	*/
575	+	public void runWithoutPermissions(Runnable r) {
576	+	runWithPermissions(r);
577	+	}
578
579		/**
580		* A security policy where new permissions can be dynamically added
581		* or all cleared.
582		*/
583	<	static class AdjustablePolicy extends java.security.Policy {
583	>	public static class AdjustablePolicy extends java.security.Policy {
584		Permissions perms = new Permissions();
585	<	AdjustablePolicy() { }
585	>	AdjustablePolicy(Permission... permissions) {
586	>	for (Permission permission : permissions)
587	>	perms.add(permission);
588	>	}
589		void addPermission(Permission perm) { perms.add(perm); }
590		void clearPermissions() { perms = new Permissions(); }
591	<	public PermissionCollection getPermissions(CodeSource cs) {
592	<	return perms;
593	<	}
594	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
595	<	return perms;
596	<	}
597	<	public boolean implies(ProtectionDomain pd, Permission p) {
598	<	return perms.implies(p);
599	<	}
600	<	public void refresh() {}
591	>	public PermissionCollection getPermissions(CodeSource cs) {
592	>	return perms;
593	>	}
594	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
595	>	return perms;
596	>	}
597	>	public boolean implies(ProtectionDomain pd, Permission p) {
598	>	return perms.implies(p);
599	>	}
600	>	public void refresh() {}
601		}
602
603	+	/**
604	+	* Returns a policy containing all the permissions we ever need.
605	+	*/
606	+	public static Policy permissivePolicy() {
607	+	return new AdjustablePolicy
608	+	// Permissions j.u.c. needs directly
609	+	(new RuntimePermission("modifyThread"),
610	+	new RuntimePermission("getClassLoader"),
611	+	new RuntimePermission("setContextClassLoader"),
612	+	// Permissions needed to change permissions!
613	+	new SecurityPermission("getPolicy"),
614	+	new SecurityPermission("setPolicy"),
615	+	new RuntimePermission("setSecurityManager"),
616	+	// Permissions needed by the junit test harness
617	+	new RuntimePermission("accessDeclaredMembers"),
618	+	new PropertyPermission("*", "read"),
619	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
620	+	}
621
622	<	// Some convenient Runnable classes
623	<
624	<	static class NoOpRunnable implements Runnable {
625	<	public void run() {}
622	>	/**
623	>	* Sleeps until the given time has elapsed.
624	>	* Throws AssertionFailedError if interrupted.
625	>	*/
626	>	void sleep(long millis) {
627	>	try {
628	>	delay(millis);
629	>	} catch (InterruptedException ie) {
630	>	AssertionFailedError afe =
631	>	new AssertionFailedError("Unexpected InterruptedException");
632	>	afe.initCause(ie);
633	>	throw afe;
634	>	}
635		}
636
637	<	static class NoOpCallable implements Callable {
638	<	public Object call() { return Boolean.TRUE; }
637	>	/**
638	>	* Sleeps until the timeout has elapsed, or interrupted.
639	>	* Does <em>NOT</em> throw InterruptedException.
640	>	*/
641	>	void sleepTillInterrupted(long timeoutMillis) {
642	>	try {
643	>	Thread.sleep(timeoutMillis);
644	>	} catch (InterruptedException wakeup) {}
645		}
646
647	<	static final String TEST_STRING = "a test string";
647	>	/**
648	>	* Waits up to the specified number of milliseconds for the given
649	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
650	>	*/
651	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
652	>	long timeoutNanos = timeoutMillis * 1000L * 1000L;
653	>	long t0 = System.nanoTime();
654	>	for (;;) {
655	>	Thread.State s = thread.getState();
656	>	if (s == Thread.State.BLOCKED ||
657	>	s == Thread.State.WAITING ||
658	>	s == Thread.State.TIMED_WAITING)
659	>	return;
660	>	else if (s == Thread.State.TERMINATED)
661	>	fail("Unexpected thread termination");
662	>	else if (System.nanoTime() - t0 > timeoutNanos) {
663	>	threadAssertTrue(thread.isAlive());
664	>	return;
665	>	}
666	>	Thread.yield();
667	>	}
668	>	}
669
670	<	static class StringTask implements Callable<String> {
671	<	public String call() { return TEST_STRING; }
670	>	/**
671	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
672	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
673	>	*/
674	>	void waitForThreadToEnterWaitState(Thread thread) {
675	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
676		}
677
678	<	static class NPETask implements Callable<String> {
679	<	public String call() { throw new NullPointerException(); }
678	>	/**
679	>	* Returns the number of milliseconds since time given by
680	>	* startNanoTime, which must have been previously returned from a
681	>	* call to {@link System.nanoTime()}.
682	>	*/
683	>	long millisElapsedSince(long startNanoTime) {
684	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
685		}
686
687	<	static class CallableOne implements Callable<Integer> {
688	<	public Integer call() { return one; }
687	>	/**
688	>	* Returns a new started daemon Thread running the given runnable.
689	>	*/
690	>	Thread newStartedThread(Runnable runnable) {
691	>	Thread t = new Thread(runnable);
692	>	t.setDaemon(true);
693	>	t.start();
694	>	return t;
695		}
696
697	<	class ShortRunnable implements Runnable {
698	<	public void run() {
699	<	try {
700	<	Thread.sleep(SHORT_DELAY_MS);
701	<	}
702	<	catch(Exception e) {
703	<	threadUnexpectedException();
697	>	/**
698	>	* Waits for the specified time (in milliseconds) for the thread
699	>	* to terminate (using {@link Thread#join(long)}), else interrupts
700	>	* the thread (in the hope that it may terminate later) and fails.
701	>	*/
702	>	void awaitTermination(Thread t, long timeoutMillis) {
703	>	try {
704	>	t.join(timeoutMillis);
705	>	} catch (InterruptedException ie) {
706	>	threadUnexpectedException(ie);
707	>	} finally {
708	>	if (t.isAlive()) {
709	>	t.interrupt();
710	>	fail("Test timed out");
711		}
712		}
713		}
714
715	<	class ShortInterruptedRunnable implements Runnable {
716	<	public void run() {
715	>	/**
716	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
717	>	* terminate (using {@link Thread#join(long)}), else interrupts
718	>	* the thread (in the hope that it may terminate later) and fails.
719	>	*/
720	>	void awaitTermination(Thread t) {
721	>	awaitTermination(t, LONG_DELAY_MS);
722	>	}
723	>
724	>	// Some convenient Runnable classes
725	>
726	>	public abstract class CheckedRunnable implements Runnable {
727	>	protected abstract void realRun() throws Throwable;
728	>
729	>	public final void run() {
730		try {
731	<	Thread.sleep(SHORT_DELAY_MS);
732	<	threadShouldThrow();
733	<	}
408	<	catch(InterruptedException success) {
731	>	realRun();
732	>	} catch (Throwable t) {
733	>	threadUnexpectedException(t);
734		}
735		}
736		}
737
738	<	class SmallRunnable implements Runnable {
739	<	public void run() {
738	>	public abstract class RunnableShouldThrow implements Runnable {
739	>	protected abstract void realRun() throws Throwable;
740	>
741	>	final Class<?> exceptionClass;
742	>
743	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
744	>	this.exceptionClass = exceptionClass;
745	>	}
746	>
747	>	public final void run() {
748		try {
749	<	Thread.sleep(SMALL_DELAY_MS);
750	<	}
751	<	catch(Exception e) {
752	<	threadUnexpectedException();
749	>	realRun();
750	>	threadShouldThrow(exceptionClass.getSimpleName());
751	>	} catch (Throwable t) {
752	>	if (! exceptionClass.isInstance(t))
753	>	threadUnexpectedException(t);
754		}
755		}
756		}
757
758	<	class SmallPossiblyInterruptedRunnable implements Runnable {
759	<	public void run() {
758	>	public abstract class ThreadShouldThrow extends Thread {
759	>	protected abstract void realRun() throws Throwable;
760	>
761	>	final Class<?> exceptionClass;
762	>
763	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
764	>	this.exceptionClass = exceptionClass;
765	>	}
766	>
767	>	public final void run() {
768		try {
769	<	Thread.sleep(SMALL_DELAY_MS);
770	<	}
771	<	catch(Exception e) {
769	>	realRun();
770	>	threadShouldThrow(exceptionClass.getSimpleName());
771	>	} catch (Throwable t) {
772	>	if (! exceptionClass.isInstance(t))
773	>	threadUnexpectedException(t);
774		}
775		}
776		}
777
778	<	class SmallCallable implements Callable {
779	<	public Object call() {
778	>	public abstract class CheckedInterruptedRunnable implements Runnable {
779	>	protected abstract void realRun() throws Throwable;
780	>
781	>	public final void run() {
782		try {
783	<	Thread.sleep(SMALL_DELAY_MS);
784	<	}
785	<	catch(Exception e) {
786	<	threadUnexpectedException();
783	>	realRun();
784	>	threadShouldThrow("InterruptedException");
785	>	} catch (InterruptedException success) {
786	>	} catch (Throwable t) {
787	>	threadUnexpectedException(t);
788		}
442	–	return Boolean.TRUE;
789		}
790		}
791
792	<	class SmallInterruptedRunnable implements Runnable {
793	<	public void run() {
792	>	public abstract class CheckedCallable<T> implements Callable<T> {
793	>	protected abstract T realCall() throws Throwable;
794	>
795	>	public final T call() {
796		try {
797	<	Thread.sleep(SMALL_DELAY_MS);
798	<	threadShouldThrow();
799	<	}
800	<	catch(InterruptedException success) {
797	>	return realCall();
798	>	} catch (Throwable t) {
799	>	threadUnexpectedException(t);
800	>	return null;
801		}
802		}
803		}
804
805	+	public abstract class CheckedInterruptedCallable<T>
806	+	implements Callable<T> {
807	+	protected abstract T realCall() throws Throwable;
808
809	<	class MediumRunnable implements Runnable {
459	<	public void run() {
809	>	public final T call() {
810		try {
811	<	Thread.sleep(MEDIUM_DELAY_MS);
812	<	}
813	<	catch(Exception e) {
814	<	threadUnexpectedException();
811	>	T result = realCall();
812	>	threadShouldThrow("InterruptedException");
813	>	return result;
814	>	} catch (InterruptedException success) {
815	>	} catch (Throwable t) {
816	>	threadUnexpectedException(t);
817		}
818	+	return null;
819		}
820		}
821
822	<	class MediumInterruptedRunnable implements Runnable {
823	<	public void run() {
822	>	public static class NoOpRunnable implements Runnable {
823	>	public void run() {}
824	>	}
825	>
826	>	public static class NoOpCallable implements Callable {
827	>	public Object call() { return Boolean.TRUE; }
828	>	}
829	>
830	>	public static final String TEST_STRING = "a test string";
831	>
832	>	public static class StringTask implements Callable<String> {
833	>	public String call() { return TEST_STRING; }
834	>	}
835	>
836	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
837	>	return new CheckedCallable<String>() {
838	>	protected String realCall() {
839	>	try {
840	>	latch.await();
841	>	} catch (InterruptedException quittingTime) {}
842	>	return TEST_STRING;
843	>	}};
844	>	}
845	>
846	>	public Runnable awaiter(final CountDownLatch latch) {
847	>	return new CheckedRunnable() {
848	>	public void realRun() throws InterruptedException {
849	>	await(latch);
850	>	}};
851	>	}
852	>
853	>	public void await(CountDownLatch latch) {
854	>	try {
855	>	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
856	>	} catch (Throwable t) {
857	>	threadUnexpectedException(t);
858	>	}
859	>	}
860	>
861	>	public static class NPETask implements Callable<String> {
862	>	public String call() { throw new NullPointerException(); }
863	>	}
864	>
865	>	public static class CallableOne implements Callable<Integer> {
866	>	public Integer call() { return one; }
867	>	}
868	>
869	>	public class ShortRunnable extends CheckedRunnable {
870	>	protected void realRun() throws Throwable {
871	>	delay(SHORT_DELAY_MS);
872	>	}
873	>	}
874	>
875	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
876	>	protected void realRun() throws InterruptedException {
877	>	delay(SHORT_DELAY_MS);
878	>	}
879	>	}
880	>
881	>	public class SmallRunnable extends CheckedRunnable {
882	>	protected void realRun() throws Throwable {
883	>	delay(SMALL_DELAY_MS);
884	>	}
885	>	}
886	>
887	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
888	>	protected void realRun() {
889		try {
890	<	Thread.sleep(MEDIUM_DELAY_MS);
891	<	threadShouldThrow();
474	<	}
475	<	catch(InterruptedException success) {
476	<	}
890	>	delay(SMALL_DELAY_MS);
891	>	} catch (InterruptedException ok) {}
892		}
893		}
894
895	<	class MediumPossiblyInterruptedRunnable implements Runnable {
896	<	public void run() {
895	>	public class SmallCallable extends CheckedCallable {
896	>	protected Object realCall() throws InterruptedException {
897	>	delay(SMALL_DELAY_MS);
898	>	return Boolean.TRUE;
899	>	}
900	>	}
901	>
902	>	public class MediumRunnable extends CheckedRunnable {
903	>	protected void realRun() throws Throwable {
904	>	delay(MEDIUM_DELAY_MS);
905	>	}
906	>	}
907	>
908	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
909	>	protected void realRun() throws InterruptedException {
910	>	delay(MEDIUM_DELAY_MS);
911	>	}
912	>	}
913	>
914	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
915	>	return new CheckedRunnable() {
916	>	protected void realRun() {
917	>	try {
918	>	delay(timeoutMillis);
919	>	} catch (InterruptedException ok) {}
920	>	}};
921	>	}
922	>
923	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
924	>	protected void realRun() {
925		try {
926	<	Thread.sleep(MEDIUM_DELAY_MS);
927	<	}
485	<	catch(InterruptedException success) {
486	<	}
926	>	delay(MEDIUM_DELAY_MS);
927	>	} catch (InterruptedException ok) {}
928		}
929		}
930
931	<	class LongPossiblyInterruptedRunnable implements Runnable {
932	<	public void run() {
931	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
932	>	protected void realRun() {
933		try {
934	<	Thread.sleep(LONG_DELAY_MS);
935	<	}
495	<	catch(InterruptedException success) {
496	<	}
934	>	delay(LONG_DELAY_MS);
935	>	} catch (InterruptedException ok) {}
936		}
937		}
938
939		/**
940		* For use as ThreadFactory in constructors
941		*/
942	<	static class SimpleThreadFactory implements ThreadFactory{
943	<	public Thread newThread(Runnable r){
942	>	public static class SimpleThreadFactory implements ThreadFactory {
943	>	public Thread newThread(Runnable r) {
944		return new Thread(r);
945	<	}
945	>	}
946	>	}
947	>
948	>	public interface TrackedRunnable extends Runnable {
949	>	boolean isDone();
950		}
951
952	<	static class TrackedShortRunnable implements Runnable {
953	<	volatile boolean done = false;
952	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
953	>	return new TrackedRunnable() {
954	>	private volatile boolean done = false;
955	>	public boolean isDone() { return done; }
956	>	public void run() {
957	>	try {
958	>	delay(timeoutMillis);
959	>	done = true;
960	>	} catch (InterruptedException ok) {}
961	>	}
962	>	};
963	>	}
964	>
965	>	public static class TrackedShortRunnable implements Runnable {
966	>	public volatile boolean done = false;
967		public void run() {
968		try {
969	<	Thread.sleep(SMALL_DELAY_MS);
969	>	delay(SHORT_DELAY_MS);
970		done = true;
971	<	} catch(Exception e){
516	<	}
971	>	} catch (InterruptedException ok) {}
972		}
973		}
974
975	<	static class TrackedMediumRunnable implements Runnable {
976	<	volatile boolean done = false;
975	>	public static class TrackedSmallRunnable implements Runnable {
976	>	public volatile boolean done = false;
977		public void run() {
978		try {
979	<	Thread.sleep(MEDIUM_DELAY_MS);
979	>	delay(SMALL_DELAY_MS);
980		done = true;
981	<	} catch(Exception e){
527	<	}
981	>	} catch (InterruptedException ok) {}
982		}
983		}
984
985	<	static class TrackedLongRunnable implements Runnable {
986	<	volatile boolean done = false;
985	>	public static class TrackedMediumRunnable implements Runnable {
986	>	public volatile boolean done = false;
987		public void run() {
988		try {
989	<	Thread.sleep(LONG_DELAY_MS);
989	>	delay(MEDIUM_DELAY_MS);
990		done = true;
991	<	} catch(Exception e){
538	<	}
991	>	} catch (InterruptedException ok) {}
992		}
993		}
994
995	<	static class TrackedNoOpRunnable implements Runnable {
996	<	volatile boolean done = false;
995	>	public static class TrackedLongRunnable implements Runnable {
996	>	public volatile boolean done = false;
997	>	public void run() {
998	>	try {
999	>	delay(LONG_DELAY_MS);
1000	>	done = true;
1001	>	} catch (InterruptedException ok) {}
1002	>	}
1003	>	}
1004	>
1005	>	public static class TrackedNoOpRunnable implements Runnable {
1006	>	public volatile boolean done = false;
1007		public void run() {
1008		done = true;
1009		}
1010		}
1011
1012	<	static class TrackedCallable implements Callable {
1013	<	volatile boolean done = false;
1012	>	public static class TrackedCallable implements Callable {
1013	>	public volatile boolean done = false;
1014		public Object call() {
1015		try {
1016	<	Thread.sleep(SMALL_DELAY_MS);
1016	>	delay(SMALL_DELAY_MS);
1017		done = true;
1018	<	} catch(Exception e){
556	<	}
1018	>	} catch (InterruptedException ok) {}
1019		return Boolean.TRUE;
1020		}
1021		}
1022
1023	+	/**
1024	+	* Analog of CheckedRunnable for RecursiveAction
1025	+	*/
1026	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1027	+	protected abstract void realCompute() throws Throwable;
1028	+
1029	+	public final void compute() {
1030	+	try {
1031	+	realCompute();
1032	+	} catch (Throwable t) {
1033	+	threadUnexpectedException(t);
1034	+	}
1035	+	}
1036	+	}
1037	+
1038	+	/**
1039	+	* Analog of CheckedCallable for RecursiveTask
1040	+	*/
1041	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1042	+	protected abstract T realCompute() throws Throwable;
1043	+
1044	+	public final T compute() {
1045	+	try {
1046	+	return realCompute();
1047	+	} catch (Throwable t) {
1048	+	threadUnexpectedException(t);
1049	+	return null;
1050	+	}
1051	+	}
1052	+	}
1053
1054		/**
1055		* For use as RejectedExecutionHandler in constructors
1056		*/
1057	<	static class NoOpREHandler implements RejectedExecutionHandler{
1058	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1057	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1058	>	public void rejectedExecution(Runnable r,
1059	>	ThreadPoolExecutor executor) {}
1060	>	}
1061	>
1062	>	/**
1063	>	* A CyclicBarrier that fails with AssertionFailedErrors instead
1064	>	* of throwing checked exceptions.
1065	>	*/
1066	>	public class CheckedBarrier extends CyclicBarrier {
1067	>	public CheckedBarrier(int parties) { super(parties); }
1068	>
1069	>	public int await() {
1070	>	try {
1071	>	return super.await();
1072	>	} catch (Exception e) {
1073	>	AssertionFailedError afe =
1074	>	new AssertionFailedError("Unexpected exception: " + e);
1075	>	afe.initCause(e);
1076	>	throw afe;
1077	>	}
1078	>	}
1079	>	}
1080	>
1081	>	public void checkEmpty(BlockingQueue q) {
1082	>	try {
1083	>	assertTrue(q.isEmpty());
1084	>	assertEquals(0, q.size());
1085	>	assertNull(q.peek());
1086	>	assertNull(q.poll());
1087	>	assertNull(q.poll(0, MILLISECONDS));
1088	>	assertEquals(q.toString(), "[]");
1089	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1090	>	assertFalse(q.iterator().hasNext());
1091	>	try {
1092	>	q.element();
1093	>	shouldThrow();
1094	>	} catch (NoSuchElementException success) {}
1095	>	try {
1096	>	q.iterator().next();
1097	>	shouldThrow();
1098	>	} catch (NoSuchElementException success) {}
1099	>	try {
1100	>	q.remove();
1101	>	shouldThrow();
1102	>	} catch (NoSuchElementException success) {}
1103	>	} catch (InterruptedException ie) {
1104	>	threadUnexpectedException(ie);
1105	>	}
1106	>	}
1107	>
1108	>	@SuppressWarnings("unchecked")
1109	>	public <T> T serialClone(T o) {
1110	>	try {
1111	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1112	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1113	>	oos.writeObject(o);
1114	>	oos.flush();
1115	>	oos.close();
1116	>	ByteArrayInputStream bin =
1117	>	new ByteArrayInputStream(bos.toByteArray());
1118	>	ObjectInputStream ois = new ObjectInputStream(bin);
1119	>	return (T) ois.readObject();
1120	>	} catch (Throwable t) {
1121	>	threadUnexpectedException(t);
1122	>	return null;
1123	>	}
1124		}
568	–
569	–
1125		}

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