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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.35 by jsr166, Mon Aug 3 19:07:51 2009 UTC vs.
Revision 1.52 by jsr166, Mon Sep 13 23:19:31 2010 UTC

#	Line 9 | Line 9
9		import junit.framework.*;
10		import java.util.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13		import java.io.*;
14		import java.security.*;
15
#	Line 25 | Line 26 | import java.security.*;
26		* <li> All assertions in code running in generated threads must use
27		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
28		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
29	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
29	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
30		* particularly recommended) for other code to use these forms too.
31		* Only the most typically used JUnit assertion methods are defined
32		* this way, but enough to live with.</li>
33		*
34		* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
35	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
35	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
36		* them. These methods are used to clear and check for thread
37		* assertion failures.</li>
38		*
39	<	* <li>All delays and timeouts must use one of the constants <tt>
40	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
41	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
39	>	* <li>All delays and timeouts must use one of the constants {@code
40	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
41	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
42		* discriminable from zero time, and always allows enough time for the
43		* small amounts of computation (creating a thread, calling a few
44		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
#	Line 47 | Line 48 | import java.security.*;
48		* in one spot to rerun tests on slower platforms.</li>
49		*
50		* <li> All threads generated must be joined inside each test case
51	<	* method (or <tt>fail</tt> to do so) before returning from the
52	<	* method. The <tt> joinPool</tt> method can be used to do this when
51	>	* method (or {@code fail} to do so) before returning from the
52	>	* method. The {@code joinPool} method can be used to do this when
53		* using Executors.</li>
54		*
55		* </ol>
#	Line 80 | Line 81 | import java.security.*;
81		* any particular package to simplify things for people integrating
82		* them in TCK test suites.</li>
83		*
84	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
84	>	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
85		* runs all JSR166 unit tests.</li>
86		*
87		* </ul>
88		*/
89		public class JSR166TestCase extends TestCase {
90	+	private static final boolean useSecurityManager =
91	+	Boolean.getBoolean("jsr166.useSecurityManager");
92	+
93		/**
94		* Runs all JSR166 unit tests using junit.textui.TestRunner
95		*/
96	<	public static void main (String[] args) {
96	>	public static void main(String[] args) {
97	>	if (useSecurityManager) {
98	>	System.err.println("Setting a permissive security manager");
99	>	Policy.setPolicy(permissivePolicy());
100	>	System.setSecurityManager(new SecurityManager());
101	>	}
102		int iters = 1;
103		if (args.length > 0)
104		iters = Integer.parseInt(args[0]);
105		Test s = suite();
106		for (int i = 0; i < iters; ++i) {
107	<	junit.textui.TestRunner.run (s);
107	>	junit.textui.TestRunner.run(s);
108		System.gc();
109		System.runFinalization();
110		}
#	Line 105 | Line 114 | public class JSR166TestCase extends Test
114		/**
115		* Collects all JSR166 unit tests as one suite
116		*/
117	<	public static Test suite ( ) {
117	>	public static Test suite() {
118		TestSuite suite = new TestSuite("JSR166 Unit Tests");
119
120		suite.addTest(new TestSuite(ForkJoinPoolTest.class));
#	Line 134 | Line 143 | public class JSR166TestCase extends Test
143		suite.addTest(new TestSuite(AtomicReferenceTest.class));
144		suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
145		suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
146	+	suite.addTest(new TestSuite(ConcurrentLinkedDequeTest.class));
147		suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
148		suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
149		suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
#	Line 194 | Line 204 | public class JSR166TestCase extends Test
204		/**
205		* Sets delays as multiples of SHORT_DELAY.
206		*/
207	<	protected  void setDelays() {
207	>	protected void setDelays() {
208		SHORT_DELAY_MS = getShortDelay();
209		SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
210		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
#	Line 285 | Line 295 | public class JSR166TestCase extends Test
295		}
296
297		/**
298	<	* threadFail with message "should throw exception"
298	>	* If arguments not identical, set status to indicate current testcase
299	>	* should fail
300		*/
301	<	public void threadShouldThrow() {
302	<	try {
301	>	public void threadAssertSame(Object x, Object y) {
302	>	if (x != y) {
303		threadFailed = true;
304	<	fail("should throw exception");
294	<	} catch (AssertionFailedError e) {
295	<	e.printStackTrace();
296	<	throw e;
304	>	assertSame(x, y);
305		}
306		}
307
308		/**
309	+	* threadFail with message "should throw exception"
310	+	*/
311	+	public void threadShouldThrow() {
312	+	threadFailed = true;
313	+	fail("should throw exception");
314	+	}
315	+
316	+	/**
317	+	* threadFail with message "should throw" + exceptionName
318	+	*/
319	+	public void threadShouldThrow(String exceptionName) {
320	+	threadFailed = true;
321	+	fail("should throw " + exceptionName);
322	+	}
323	+
324	+	/**
325		* threadFail with message "Unexpected exception"
326		*/
327		public void threadUnexpectedException() {
#	Line 320 | Line 344 | public class JSR166TestCase extends Test
344		public void joinPool(ExecutorService exec) {
345		try {
346		exec.shutdown();
347	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
347	>	assertTrue(exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
348		} catch (SecurityException ok) {
349		// Allowed in case test doesn't have privs
350		} catch (InterruptedException ie) {
351	<	fail("Unexpected exception");
351	>	fail("Unexpected InterruptedException");
352		}
353		}
354
#	Line 337 | Line 361 | public class JSR166TestCase extends Test
361		}
362
363		/**
364	+	* fail with message "should throw " + exceptionName
365	+	*/
366	+	public void shouldThrow(String exceptionName) {
367	+	fail("Should throw " + exceptionName);
368	+	}
369	+
370	+	/**
371		* fail with message "Unexpected exception"
372		*/
373		public void unexpectedException() {
374		fail("Unexpected exception");
375		}
376
377	+	/**
378	+	* fail with message "Unexpected exception", with argument
379	+	*/
380	+	public void unexpectedException(Throwable ex) {
381	+	ex.printStackTrace();
382	+	fail("Unexpected exception: " + ex);
383	+	}
384	+
385
386		/**
387		* The number of elements to place in collections, arrays, etc.
388		*/
389	<	static final int SIZE = 20;
389	>	public static final int SIZE = 20;
390
391		// Some convenient Integer constants
392
393	<	static final Integer zero = new Integer(0);
394	<	static final Integer one = new Integer(1);
395	<	static final Integer two = new Integer(2);
396	<	static final Integer three  = new Integer(3);
397	<	static final Integer four  = new Integer(4);
398	<	static final Integer five  = new Integer(5);
399	<	static final Integer six = new Integer(6);
400	<	static final Integer seven = new Integer(7);
401	<	static final Integer eight = new Integer(8);
402	<	static final Integer nine = new Integer(9);
403	<	static final Integer m1  = new Integer(-1);
404	<	static final Integer m2  = new Integer(-2);
405	<	static final Integer m3  = new Integer(-3);
406	<	static final Integer m4 = new Integer(-4);
407	<	static final Integer m5 = new Integer(-5);
408	<	static final Integer m6 = new Integer(-6);
409	<	static final Integer m10 = new Integer(-10);
393	>	public static final Integer zero  = new Integer(0);
394	>	public static final Integer one   = new Integer(1);
395	>	public static final Integer two   = new Integer(2);
396	>	public static final Integer three = new Integer(3);
397	>	public static final Integer four  = new Integer(4);
398	>	public static final Integer five  = new Integer(5);
399	>	public static final Integer six   = new Integer(6);
400	>	public static final Integer seven = new Integer(7);
401	>	public static final Integer eight = new Integer(8);
402	>	public static final Integer nine  = new Integer(9);
403	>	public static final Integer m1  = new Integer(-1);
404	>	public static final Integer m2  = new Integer(-2);
405	>	public static final Integer m3  = new Integer(-3);
406	>	public static final Integer m4  = new Integer(-4);
407	>	public static final Integer m5  = new Integer(-5);
408	>	public static final Integer m6  = new Integer(-6);
409	>	public static final Integer m10 = new Integer(-10);
410	>
411	>
412	>	/**
413	>	* Runs Runnable r with a security policy that permits precisely
414	>	* the specified permissions.  If there is no current security
415	>	* manager, the runnable is run twice, both with and without a
416	>	* security manager.  We require that any security manager permit
417	>	* getPolicy/setPolicy.
418	>	*/
419	>	public void runWithPermissions(Runnable r, Permission... permissions) {
420	>	SecurityManager sm = System.getSecurityManager();
421	>	if (sm == null) {
422	>	r.run();
423	>	Policy savedPolicy = Policy.getPolicy();
424	>	try {
425	>	Policy.setPolicy(permissivePolicy());
426	>	System.setSecurityManager(new SecurityManager());
427	>	runWithPermissions(r, permissions);
428	>	} finally {
429	>	System.setSecurityManager(null);
430	>	Policy.setPolicy(savedPolicy);
431	>	}
432	>	} else {
433	>	Policy savedPolicy = Policy.getPolicy();
434	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
435	>	Policy.setPolicy(policy);
436
437	+	try {
438	+	r.run();
439	+	} finally {
440	+	policy.addPermission(new SecurityPermission("setPolicy"));
441	+	Policy.setPolicy(savedPolicy);
442	+	}
443	+	}
444	+	}
445	+
446	+	/**
447	+	* Runs a runnable without any permissions.
448	+	*/
449	+	public void runWithoutPermissions(Runnable r) {
450	+	runWithPermissions(r);
451	+	}
452
453		/**
454		* A security policy where new permissions can be dynamically added
455		* or all cleared.
456		*/
457	<	static class AdjustablePolicy extends java.security.Policy {
457	>	public static class AdjustablePolicy extends java.security.Policy {
458		Permissions perms = new Permissions();
459	<	AdjustablePolicy() { }
459	>	AdjustablePolicy(Permission... permissions) {
460	>	for (Permission permission : permissions)
461	>	perms.add(permission);
462	>	}
463		void addPermission(Permission perm) { perms.add(perm); }
464		void clearPermissions() { perms = new Permissions(); }
465	<	public PermissionCollection getPermissions(CodeSource cs) {
466	<	return perms;
467	<	}
468	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
469	<	return perms;
470	<	}
471	<	public boolean implies(ProtectionDomain pd, Permission p) {
472	<	return perms.implies(p);
473	<	}
474	<	public void refresh() {}
465	>	public PermissionCollection getPermissions(CodeSource cs) {
466	>	return perms;
467	>	}
468	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
469	>	return perms;
470	>	}
471	>	public boolean implies(ProtectionDomain pd, Permission p) {
472	>	return perms.implies(p);
473	>	}
474	>	public void refresh() {}
475		}
476
477	+	/**
478	+	* Returns a policy containing all the permissions we ever need.
479	+	*/
480	+	public static Policy permissivePolicy() {
481	+	return new AdjustablePolicy
482	+	// Permissions j.u.c. needs directly
483	+	(new RuntimePermission("modifyThread"),
484	+	new RuntimePermission("getClassLoader"),
485	+	new RuntimePermission("setContextClassLoader"),
486	+	// Permissions needed to change permissions!
487	+	new SecurityPermission("getPolicy"),
488	+	new SecurityPermission("setPolicy"),
489	+	new RuntimePermission("setSecurityManager"),
490	+	// Permissions needed by the junit test harness
491	+	new RuntimePermission("accessDeclaredMembers"),
492	+	new PropertyPermission("*", "read"),
493	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
494	+	}
495	+
496	+	/**
497	+	* Sleep until the timeout has elapsed, or interrupted.
498	+	* Does <em>NOT</em> throw InterruptedException.
499	+	*/
500	+	void sleepTillInterrupted(long timeoutMillis) {
501	+	try {
502	+	Thread.sleep(timeoutMillis);
503	+	} catch (InterruptedException wakeup) {}
504	+	}
505	+
506	+	/**
507	+	* Returns a new started Thread running the given runnable.
508	+	*/
509	+	Thread newStartedThread(Runnable runnable) {
510	+	Thread t = new Thread(runnable);
511	+	t.start();
512	+	return t;
513	+	}
514
515		// Some convenient Runnable classes
516
517	<	abstract class CheckedRunnable implements Runnable {
518	<	abstract void realRun() throws Throwable;
517	>	public abstract class CheckedRunnable implements Runnable {
518	>	protected abstract void realRun() throws Throwable;
519
520		public final void run() {
521		try {
#	Line 406 | Line 526 | public class JSR166TestCase extends Test
526		}
527		}
528
529	<	abstract class CheckedInterruptedRunnable implements Runnable {
530	<	abstract void realRun() throws Throwable;
529	>	public abstract class RunnableShouldThrow implements Runnable {
530	>	protected abstract void realRun() throws Throwable;
531	>
532	>	final Class<?> exceptionClass;
533	>
534	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
535	>	this.exceptionClass = exceptionClass;
536	>	}
537	>
538	>	public final void run() {
539	>	try {
540	>	realRun();
541	>	threadShouldThrow(exceptionClass.getSimpleName());
542	>	} catch (Throwable t) {
543	>	if (! exceptionClass.isInstance(t))
544	>	threadUnexpectedException(t);
545	>	}
546	>	}
547	>	}
548	>
549	>	public abstract class ThreadShouldThrow extends Thread {
550	>	protected abstract void realRun() throws Throwable;
551	>
552	>	final Class<?> exceptionClass;
553	>
554	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
555	>	this.exceptionClass = exceptionClass;
556	>	}
557
558		public final void run() {
559		try {
560		realRun();
561	<	threadShouldThrow();
561	>	threadShouldThrow(exceptionClass.getSimpleName());
562	>	} catch (Throwable t) {
563	>	if (! exceptionClass.isInstance(t))
564	>	threadUnexpectedException(t);
565	>	}
566	>	}
567	>	}
568	>
569	>	public abstract class CheckedInterruptedRunnable implements Runnable {
570	>	protected abstract void realRun() throws Throwable;
571	>
572	>	public final void run() {
573	>	try {
574	>	realRun();
575	>	threadShouldThrow("InterruptedException");
576		} catch (InterruptedException success) {
577		} catch (Throwable t) {
578		threadUnexpectedException(t);
#	Line 420 | Line 580 | public class JSR166TestCase extends Test
580		}
581		}
582
583	<	abstract class CheckedCallable<T> implements Callable<T> {
584	<	abstract T realCall() throws Throwable;
583	>	public abstract class CheckedCallable<T> implements Callable<T> {
584	>	protected abstract T realCall() throws Throwable;
585
586		public final T call() {
587		try {
588		return realCall();
589		} catch (Throwable t) {
590		threadUnexpectedException(t);
431	–	return null;
591		}
592	+	return null;
593	+	}
594	+	}
595	+
596	+	public abstract class CheckedInterruptedCallable<T> implements Callable<T> {
597	+	protected abstract T realCall() throws Throwable;
598	+
599	+	public final T call() {
600	+	try {
601	+	T result = realCall();
602	+	threadShouldThrow("InterruptedException");
603	+	return result;
604	+	} catch (InterruptedException success) {
605	+	} catch (Throwable t) {
606	+	threadUnexpectedException(t);
607	+	}
608	+	return null;
609		}
610		}
611
612	<	static class NoOpRunnable implements Runnable {
612	>	public static class NoOpRunnable implements Runnable {
613		public void run() {}
614		}
615
616	<	static class NoOpCallable implements Callable {
616	>	public static class NoOpCallable implements Callable {
617		public Object call() { return Boolean.TRUE; }
618		}
619
620	<	static final String TEST_STRING = "a test string";
620	>	public static final String TEST_STRING = "a test string";
621
622	<	static class StringTask implements Callable<String> {
622	>	public static class StringTask implements Callable<String> {
623		public String call() { return TEST_STRING; }
624		}
625
626	<	static class NPETask implements Callable<String> {
626	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
627	>	return new CheckedCallable<String>() {
628	>	public String realCall() {
629	>	try {
630	>	latch.await();
631	>	} catch (InterruptedException quittingTime) {}
632	>	return TEST_STRING;
633	>	}};
634	>	}
635	>
636	>	public static class NPETask implements Callable<String> {
637		public String call() { throw new NullPointerException(); }
638		}
639
640	<	static class CallableOne implements Callable<Integer> {
640	>	public static class CallableOne implements Callable<Integer> {
641		public Integer call() { return one; }
642		}
643
644	<	class ShortRunnable extends CheckedRunnable {
645	<	void realRun() throws Throwable {
644	>	public class ShortRunnable extends CheckedRunnable {
645	>	protected void realRun() throws Throwable {
646		Thread.sleep(SHORT_DELAY_MS);
647		}
648		}
649
650	<	class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
651	<	void realRun() throws InterruptedException {
650	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
651	>	protected void realRun() throws InterruptedException {
652		Thread.sleep(SHORT_DELAY_MS);
653		}
654		}
655
656	<	class SmallRunnable extends CheckedRunnable {
657	<	void realRun() throws Throwable {
656	>	public class SmallRunnable extends CheckedRunnable {
657	>	protected void realRun() throws Throwable {
658		Thread.sleep(SMALL_DELAY_MS);
659		}
660		}
661
662	<	class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
663	<	void realRun() {
662	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
663	>	protected void realRun() {
664		try {
665		Thread.sleep(SMALL_DELAY_MS);
666	<	}
481	<	catch (InterruptedException ok) {
482	<	}
666	>	} catch (InterruptedException ok) {}
667		}
668		}
669
670	<	class SmallCallable extends CheckedCallable {
671	<	Object realCall() throws Throwable {
670	>	public class SmallCallable extends CheckedCallable {
671	>	protected Object realCall() throws InterruptedException {
672		Thread.sleep(SMALL_DELAY_MS);
673		return Boolean.TRUE;
674		}
675		}
676
677	<	class SmallInterruptedRunnable extends CheckedInterruptedRunnable {
678	<	void realRun() throws InterruptedException {
677	>	public class SmallInterruptedRunnable extends CheckedInterruptedRunnable {
678	>	protected void realRun() throws InterruptedException {
679		Thread.sleep(SMALL_DELAY_MS);
680		}
681		}
682
683	<	class MediumRunnable extends CheckedRunnable {
684	<	void realRun() throws Throwable {
683	>	public class MediumRunnable extends CheckedRunnable {
684	>	protected void realRun() throws Throwable {
685		Thread.sleep(MEDIUM_DELAY_MS);
686		}
687		}
688
689	<	class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
690	<	void realRun() throws InterruptedException {
689	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
690	>	protected void realRun() throws InterruptedException {
691		Thread.sleep(MEDIUM_DELAY_MS);
692		}
693		}
694
695	<	class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
696	<	void realRun() {
695	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
696	>	protected void realRun() {
697		try {
698		Thread.sleep(MEDIUM_DELAY_MS);
699	<	}
516	<	catch (InterruptedException ok) {
517	<	}
699	>	} catch (InterruptedException ok) {}
700		}
701		}
702
703	<	class LongPossiblyInterruptedRunnable extends CheckedRunnable {
704	<	void realRun() {
703	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
704	>	protected void realRun() {
705		try {
706		Thread.sleep(LONG_DELAY_MS);
707	<	}
526	<	catch (InterruptedException ok) {
527	<	}
707	>	} catch (InterruptedException ok) {}
708		}
709		}
710
711		/**
712		* For use as ThreadFactory in constructors
713		*/
714	<	static class SimpleThreadFactory implements ThreadFactory {
714	>	public static class SimpleThreadFactory implements ThreadFactory {
715		public Thread newThread(Runnable r) {
716		return new Thread(r);
717		}
718		}
719
720	<	static class TrackedShortRunnable implements Runnable {
721	<	volatile boolean done = false;
720	>	public static class TrackedShortRunnable implements Runnable {
721	>	public volatile boolean done = false;
722		public void run() {
723		try {
724		Thread.sleep(SMALL_DELAY_MS);
725		done = true;
726	<	} catch (Exception e) {
547	<	}
726	>	} catch (InterruptedException ok) {}
727		}
728		}
729
730	<	static class TrackedMediumRunnable implements Runnable {
731	<	volatile boolean done = false;
730	>	public static class TrackedMediumRunnable implements Runnable {
731	>	public volatile boolean done = false;
732		public void run() {
733		try {
734		Thread.sleep(MEDIUM_DELAY_MS);
735		done = true;
736	<	} catch (Exception e) {
558	<	}
736	>	} catch (InterruptedException ok) {}
737		}
738		}
739
740	<	static class TrackedLongRunnable implements Runnable {
741	<	volatile boolean done = false;
740	>	public static class TrackedLongRunnable implements Runnable {
741	>	public volatile boolean done = false;
742		public void run() {
743		try {
744		Thread.sleep(LONG_DELAY_MS);
745		done = true;
746	<	} catch (Exception e) {
569	<	}
746	>	} catch (InterruptedException ok) {}
747		}
748		}
749
750	<	static class TrackedNoOpRunnable implements Runnable {
751	<	volatile boolean done = false;
750	>	public static class TrackedNoOpRunnable implements Runnable {
751	>	public volatile boolean done = false;
752		public void run() {
753		done = true;
754		}
755		}
756
757	<	static class TrackedCallable implements Callable {
758	<	volatile boolean done = false;
757	>	public static class TrackedCallable implements Callable {
758	>	public volatile boolean done = false;
759		public Object call() {
760		try {
761		Thread.sleep(SMALL_DELAY_MS);
762		done = true;
763	<	} catch (Exception e) {
587	<	}
763	>	} catch (InterruptedException ok) {}
764		return Boolean.TRUE;
765		}
766		}
#	Line 593 | Line 769 | public class JSR166TestCase extends Test
769		/**
770		* For use as RejectedExecutionHandler in constructors
771		*/
772	<	static class NoOpREHandler implements RejectedExecutionHandler {
772	>	public static class NoOpREHandler implements RejectedExecutionHandler {
773		public void rejectedExecution(Runnable r,
774		ThreadPoolExecutor executor) {}
775		}

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