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Comparing jsr166/src/test/tck/CyclicBarrierTest.java (file contents):
Revision 1.5 by dl, Sun Oct 5 23:00:40 2003 UTC vs.
Revision 1.29 by jsr166, Mon May 29 22:44:26 2017 UTC

#	Line 1 | Line 1
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.
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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
9	<	import java.util.*;
10	<	import java.util.concurrent.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	public class CyclicBarrierTest extends JSR166TestCase{
11	>	import java.util.concurrent.BrokenBarrierException;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.CyclicBarrier;
14	>	import java.util.concurrent.TimeoutException;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>	import java.util.concurrent.atomic.AtomicInteger;
17	>
18	>	import junit.framework.Test;
19	>	import junit.framework.TestSuite;
20	>
21	>	public class CyclicBarrierTest extends JSR166TestCase {
22		public static void main(String[] args) {
23	<	junit.textui.TestRunner.run (suite());
23	>	main(suite(), args);
24		}
25		public static Test suite() {
26	<	return new TestSuite(CyclicBarrierTest.class);
26	>	return new TestSuite(CyclicBarrierTest.class);
27		}
28
29	<	private volatile int countAction;
30	<	private class MyAction implements Runnable {
31	<	public void run() { ++countAction; }
29	>	/**
30	>	* Spin-waits till the number of waiters == numberOfWaiters.
31	>	*/
32	>	void awaitNumberWaiting(CyclicBarrier barrier, int numberOfWaiters) {
33	>	long startTime = System.nanoTime();
34	>	while (barrier.getNumberWaiting() != numberOfWaiters) {
35	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
36	>	fail("timed out");
37	>	Thread.yield();
38	>	}
39		}
40	<
40	>
41		/**
42	<	* Creating with negative parties throws IAE
42	>	* Creating with negative parties throws IllegalArgumentException
43		*/
44		public void testConstructor1() {
45		try {
46		new CyclicBarrier(-1, (Runnable)null);
47		shouldThrow();
48	<	} catch(IllegalArgumentException e){}
48	>	} catch (IllegalArgumentException success) {}
49		}
50
51		/**
52	<	* Creating with negative parties and no action throws IAE
52	>	* Creating with negative parties and no action throws
53	>	* IllegalArgumentException
54		*/
55		public void testConstructor2() {
56		try {
57		new CyclicBarrier(-1);
58		shouldThrow();
59	<	} catch(IllegalArgumentException e){}
59	>	} catch (IllegalArgumentException success) {}
60		}
61
62		/**
#	Line 47 | Line 64 | public class CyclicBarrierTest extends J
64		*/
65		public void testGetParties() {
66		CyclicBarrier b = new CyclicBarrier(2);
67	<	assertEquals(2, b.getParties());
67	>	assertEquals(2, b.getParties());
68		assertEquals(0, b.getNumberWaiting());
69		}
70
71		/**
72		* A 1-party barrier triggers after single await
73		*/
74	<	public void testSingleParty() {
75	<	try {
76	<	CyclicBarrier b = new CyclicBarrier(1);
77	<	assertEquals(1, b.getParties());
78	<	assertEquals(0, b.getNumberWaiting());
79	<	b.await();
80	<	b.await();
64	<	assertEquals(0, b.getNumberWaiting());
65	<	}
66	<	catch(Exception e) {
67	<	unexpectedException();
68	<	}
74	>	public void testSingleParty() throws Exception {
75	>	CyclicBarrier b = new CyclicBarrier(1);
76	>	assertEquals(1, b.getParties());
77	>	assertEquals(0, b.getNumberWaiting());
78	>	b.await();
79	>	b.await();
80	>	assertEquals(0, b.getNumberWaiting());
81		}
82	<
82	>
83		/**
84		* The supplied barrier action is run at barrier
85		*/
86	<	public void testBarrierAction() {
87	<	try {
88	<	countAction = 0;
89	<	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
90	<	assertEquals(1, b.getParties());
91	<	assertEquals(0, b.getNumberWaiting());
92	<	b.await();
93	<	b.await();
94	<	assertEquals(0, b.getNumberWaiting());
95	<	assertEquals(countAction, 2);
96	<	}
85	<	catch(Exception e) {
86	<	unexpectedException();
87	<	}
86	>	public void testBarrierAction() throws Exception {
87	>	final AtomicInteger count = new AtomicInteger(0);
88	>	final Runnable incCount = new Runnable() { public void run() {
89	>	count.getAndIncrement(); }};
90	>	CyclicBarrier b = new CyclicBarrier(1, incCount);
91	>	assertEquals(1, b.getParties());
92	>	assertEquals(0, b.getNumberWaiting());
93	>	b.await();
94	>	b.await();
95	>	assertEquals(0, b.getNumberWaiting());
96	>	assertEquals(2, count.get());
97		}
98
99		/**
100		* A 2-party/thread barrier triggers after both threads invoke await
101		*/
102	<	public void testTwoParties() {
102	>	public void testTwoParties() throws Exception {
103		final CyclicBarrier b = new CyclicBarrier(2);
104	<	Thread t = new Thread(new Runnable() {
105	<	public void run() {
106	<	try {
107	<	b.await();
108	<	b.await();
109	<	b.await();
110	<	b.await();
111	<	} catch(Exception e){
112	<	threadUnexpectedException();
113	<	}}});
114	<
115	<	try {
116	<	t.start();
108	<	b.await();
109	<	b.await();
110	<	b.await();
111	<	b.await();
112	<	t.join();
113	<	} catch(Exception e){
114	<	unexpectedException();
115	<	}
104	>	Thread t = newStartedThread(new CheckedRunnable() {
105	>	public void realRun() throws Exception {
106	>	b.await();
107	>	b.await();
108	>	b.await();
109	>	b.await();
110	>	}});
111	>
112	>	b.await();
113	>	b.await();
114	>	b.await();
115	>	b.await();
116	>	awaitTermination(t);
117		}
118
118	–
119		/**
120		* An interruption in one party causes others waiting in await to
121		* throw BrokenBarrierException
122		*/
123		public void testAwait1_Interrupted_BrokenBarrier() {
124		final CyclicBarrier c = new CyclicBarrier(3);
125	<	Thread t1 = new Thread(new Runnable() {
126	<	public void run() {
127	<	try {
128	<	c.await();
129	<	threadShouldThrow();
130	<	} catch(InterruptedException success){}
131	<	catch(Exception b){
132	<	threadUnexpectedException();
133	<	}
134	<	}
135	<	});
136	<	Thread t2 = new Thread(new Runnable() {
137	<	public void run() {
138	<	try {
139	<	c.await();
140	<	threadShouldThrow();
141	<	} catch(BrokenBarrierException success){
142	<	} catch(Exception i){
143	<	threadUnexpectedException();
144	<	}
145	<	}
146	<	});
147	<	try {
148	<	t1.start();
149	<	t2.start();
150	<	Thread.sleep(SHORT_DELAY_MS);
151	<	t1.interrupt();
152	<	t1.join();
153	<	t2.join();
154	<	} catch(InterruptedException e){
155	<	unexpectedException();
156	<	}
125	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
126	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
127	>	public void realRun() throws Exception {
128	>	pleaseInterrupt.countDown();
129	>	c.await();
130	>	}};
131	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
132	>	public void realRun() throws Exception {
133	>	pleaseInterrupt.countDown();
134	>	c.await();
135	>	}};
136	>
137	>	t1.start();
138	>	t2.start();
139	>	await(pleaseInterrupt);
140	>	t1.interrupt();
141	>	awaitTermination(t1);
142	>	awaitTermination(t2);
143		}
144
145		/**
146		* An interruption in one party causes others waiting in timed await to
147		* throw BrokenBarrierException
148		*/
149	<	public void testAwait2_Interrupted_BrokenBarrier() {
150	<	final CyclicBarrier c = new CyclicBarrier(3);
151	<	Thread t1 = new Thread(new Runnable() {
152	<	public void run() {
153	<	try {
154	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
155	<	threadShouldThrow();
156	<	} catch(InterruptedException success){
157	<	} catch(Exception b){
158	<	threadUnexpectedException();
159	<	}
160	<	}
161	<	});
162	<	Thread t2 = new Thread(new Runnable() {
163	<	public void run() {
164	<	try {
165	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
166	<	threadShouldThrow();
167	<	} catch(BrokenBarrierException success){
168	<	} catch(Exception i){
183	<	threadUnexpectedException();
184	<	}
185	<	}
186	<	});
187	<	try {
188	<	t1.start();
189	<	t2.start();
190	<	Thread.sleep(SHORT_DELAY_MS);
191	<	t1.interrupt();
192	<	t1.join();
193	<	t2.join();
194	<	} catch(InterruptedException e){
195	<	unexpectedException();
196	<	}
149	>	public void testAwait2_Interrupted_BrokenBarrier() throws Exception {
150	>	final CyclicBarrier c = new CyclicBarrier(3);
151	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
152	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
153	>	public void realRun() throws Exception {
154	>	pleaseInterrupt.countDown();
155	>	c.await(LONG_DELAY_MS, MILLISECONDS);
156	>	}};
157	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
158	>	public void realRun() throws Exception {
159	>	pleaseInterrupt.countDown();
160	>	c.await(LONG_DELAY_MS, MILLISECONDS);
161	>	}};
162	>
163	>	t1.start();
164	>	t2.start();
165	>	await(pleaseInterrupt);
166	>	t1.interrupt();
167	>	awaitTermination(t1);
168	>	awaitTermination(t2);
169		}
170	<
170	>
171		/**
172		* A timeout in timed await throws TimeoutException
173		*/
174	<	public void testAwait3_TimeOutException() {
174	>	public void testAwait3_TimeoutException() throws InterruptedException {
175		final CyclicBarrier c = new CyclicBarrier(2);
176	<	Thread t = new Thread(new Runnable() {
177	<	public void run() {
178	<	try {
179	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
180	<	threadShouldThrow();
181	<	} catch(TimeoutException success){
182	<	} catch(Exception b){
183	<	threadUnexpectedException();
184	<
185	<	}
186	<	}
215	<	});
216	<	try {
217	<	t.start();
218	<	t.join();
219	<	} catch(InterruptedException e){
220	<	unexpectedException();
221	<	}
176	>	Thread t = newStartedThread(new CheckedRunnable() {
177	>	public void realRun() throws Exception {
178	>	long startTime = System.nanoTime();
179	>	try {
180	>	c.await(timeoutMillis(), MILLISECONDS);
181	>	shouldThrow();
182	>	} catch (TimeoutException success) {}
183	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
184	>	}});
185	>
186	>	awaitTermination(t);
187		}
188
189		/**
190		* A timeout in one party causes others waiting in timed await to
191		* throw BrokenBarrierException
192		*/
193	<	public void testAwait4_Timeout_BrokenBarrier() {
194	<	final CyclicBarrier c = new CyclicBarrier(3);
195	<	Thread t1 = new Thread(new Runnable() {
196	<	public void run() {
197	<	try {
198	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
199	<	threadShouldThrow();
200	<	} catch(TimeoutException success){
201	<	} catch(Exception b){
202	<	threadUnexpectedException();
203	<	}
204	<	}
205	<	});
206	<	Thread t2 = new Thread(new Runnable() {
207	<	public void run() {
208	<	try {
209	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
210	<	threadShouldThrow();
211	<	} catch(BrokenBarrierException success){
212	<	} catch(Exception i){
213	<	threadUnexpectedException();
214	<	}
250	<	}
251	<	});
252	<	try {
253	<	t1.start();
254	<	t2.start();
255	<	t1.join();
256	<	t2.join();
257	<	} catch(InterruptedException e){
258	<	unexpectedException();
259	<	}
193	>	public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException {
194	>	final CyclicBarrier c = new CyclicBarrier(3);
195	>	Thread t1 = newStartedThread(new CheckedRunnable() {
196	>	public void realRun() throws Exception {
197	>	try {
198	>	c.await(LONG_DELAY_MS, MILLISECONDS);
199	>	shouldThrow();
200	>	} catch (BrokenBarrierException success) {}
201	>	}});
202	>	Thread t2 = newStartedThread(new CheckedRunnable() {
203	>	public void realRun() throws Exception {
204	>	awaitNumberWaiting(c, 1);
205	>	long startTime = System.nanoTime();
206	>	try {
207	>	c.await(timeoutMillis(), MILLISECONDS);
208	>	shouldThrow();
209	>	} catch (TimeoutException success) {}
210	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
211	>	}});
212	>
213	>	awaitTermination(t1);
214	>	awaitTermination(t2);
215		}
216
217		/**
218		* A timeout in one party causes others waiting in await to
219		* throw BrokenBarrierException
220		*/
221	<	public void testAwait5_Timeout_BrokenBarrier() {
222	<	final CyclicBarrier c = new CyclicBarrier(3);
223	<	Thread t1 = new Thread(new Runnable() {
224	<	public void run() {
225	<	try {
226	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
227	<	threadShouldThrow();
228	<	} catch(TimeoutException success){
229	<	} catch(Exception b){
230	<	threadUnexpectedException();
231	<	}
232	<	}
233	<	});
234	<	Thread t2 = new Thread(new Runnable() {
235	<	public void run() {
236	<	try {
237	<	c.await();
238	<	threadShouldThrow();
239	<	} catch(BrokenBarrierException success){
240	<	} catch(Exception i){
241	<	threadUnexpectedException();
242	<	}
288	<	}
289	<	});
290	<	try {
291	<	t1.start();
292	<	t2.start();
293	<	t1.join();
294	<	t2.join();
295	<	} catch(InterruptedException e){
296	<	unexpectedException();
297	<	}
221	>	public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException {
222	>	final CyclicBarrier c = new CyclicBarrier(3);
223	>	Thread t1 = newStartedThread(new CheckedRunnable() {
224	>	public void realRun() throws Exception {
225	>	try {
226	>	c.await();
227	>	shouldThrow();
228	>	} catch (BrokenBarrierException success) {}
229	>	}});
230	>	Thread t2 = newStartedThread(new CheckedRunnable() {
231	>	public void realRun() throws Exception {
232	>	awaitNumberWaiting(c, 1);
233	>	long startTime = System.nanoTime();
234	>	try {
235	>	c.await(timeoutMillis(), MILLISECONDS);
236	>	shouldThrow();
237	>	} catch (TimeoutException success) {}
238	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
239	>	}});
240	>
241	>	awaitTermination(t1);
242	>	awaitTermination(t2);
243		}
244	<
244	>
245		/**
246		* A reset of an active barrier causes waiting threads to throw
247		* BrokenBarrierException
248		*/
249	<	public void testReset_BrokenBarrier() {
249	>	public void testReset_BrokenBarrier() throws InterruptedException {
250		final CyclicBarrier c = new CyclicBarrier(3);
251	<	Thread t1 = new Thread(new Runnable() {
252	<	public void run() {
253	<	try {
254	<	c.await();
255	<	threadShouldThrow();
256	<	} catch(BrokenBarrierException success){}
257	<	catch(Exception b){
258	<	threadUnexpectedException();
259	<	}
260	<	}
261	<	});
262	<	Thread t2 = new Thread(new Runnable() {
263	<	public void run() {
264	<	try {
265	<	c.await();
266	<	threadShouldThrow();
267	<	} catch(BrokenBarrierException success){
268	<	} catch(Exception i){
269	<	threadUnexpectedException();
270	<	}
326	<	}
327	<	});
328	<	try {
329	<	t1.start();
330	<	t2.start();
331	<	Thread.sleep(SHORT_DELAY_MS);
332	<	c.reset();
333	<	t1.join();
334	<	t2.join();
335	<	} catch(InterruptedException e){
336	<	unexpectedException();
337	<	}
251	>	final CountDownLatch pleaseReset = new CountDownLatch(2);
252	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
253	>	public void realRun() throws Exception {
254	>	pleaseReset.countDown();
255	>	c.await();
256	>	}};
257	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
258	>	public void realRun() throws Exception {
259	>	pleaseReset.countDown();
260	>	c.await();
261	>	}};
262	>
263	>	t1.start();
264	>	t2.start();
265	>	await(pleaseReset);
266	>
267	>	awaitNumberWaiting(c, 2);
268	>	c.reset();
269	>	awaitTermination(t1);
270	>	awaitTermination(t2);
271		}
272
273		/**
274		* A reset before threads enter barrier does not throw
275		* BrokenBarrierException
276		*/
277	<	public void testReset_NoBrokenBarrier() {
277	>	public void testReset_NoBrokenBarrier() throws Exception {
278		final CyclicBarrier c = new CyclicBarrier(3);
279	<	Thread t1 = new Thread(new Runnable() {
280	<	public void run() {
281	<	try {
282	<	c.await();
283	<	} catch(Exception b){
284	<	threadUnexpectedException();
285	<	}
286	<	}
287	<	});
288	<	Thread t2 = new Thread(new Runnable() {
289	<	public void run() {
279	>	c.reset();
280	>
281	>	Thread t1 = newStartedThread(new CheckedRunnable() {
282	>	public void realRun() throws Exception {
283	>	c.await();
284	>	}});
285	>	Thread t2 = newStartedThread(new CheckedRunnable() {
286	>	public void realRun() throws Exception {
287	>	c.await();
288	>	}});
289	>
290	>	c.await();
291	>	awaitTermination(t1);
292	>	awaitTermination(t2);
293	>	}
294	>
295	>	/**
296	>	* All threads block while a barrier is broken.
297	>	*/
298	>	public void testReset_Leakage() throws InterruptedException {
299	>	final CyclicBarrier c = new CyclicBarrier(2);
300	>	final AtomicBoolean done = new AtomicBoolean();
301	>	Thread t = newStartedThread(new CheckedRunnable() {
302	>	public void realRun() {
303	>	while (!done.get()) {
304		try {
305	+	while (c.isBroken())
306	+	c.reset();
307	+
308		c.await();
309	<	} catch(Exception i){
360	<	threadUnexpectedException();
309	>	shouldThrow();
310		}
311	<	}
312	<	});
313	<	try {
314	<	c.reset();
311	>	catch (BrokenBarrierException ok) {}
312	>	catch (InterruptedException ok) {}
313	>	}}});
314	>
315	>	for (int i = 0; i < 4; i++) {
316	>	delay(timeoutMillis());
317	>	t.interrupt();
318	>	}
319	>	done.set(true);
320	>	t.interrupt();
321	>	awaitTermination(t);
322	>	}
323	>
324	>	/**
325	>	* Reset of a non-broken barrier does not break barrier
326	>	*/
327	>	public void testResetWithoutBreakage() throws Exception {
328	>	final CyclicBarrier barrier = new CyclicBarrier(3);
329	>	for (int i = 0; i < 3; i++) {
330	>	final CyclicBarrier start = new CyclicBarrier(3);
331	>	Thread t1 = newStartedThread(new CheckedRunnable() {
332	>	public void realRun() throws Exception {
333	>	start.await();
334	>	barrier.await();
335	>	}});
336	>
337	>	Thread t2 = newStartedThread(new CheckedRunnable() {
338	>	public void realRun() throws Exception {
339	>	start.await();
340	>	barrier.await();
341	>	}});
342	>
343	>	start.await();
344	>	barrier.await();
345	>	awaitTermination(t1);
346	>	awaitTermination(t2);
347	>	assertFalse(barrier.isBroken());
348	>	assertEquals(0, barrier.getNumberWaiting());
349	>	if (i == 1) barrier.reset();
350	>	assertFalse(barrier.isBroken());
351	>	assertEquals(0, barrier.getNumberWaiting());
352	>	}
353	>	}
354	>
355	>	/**
356	>	* Reset of a barrier after interruption reinitializes it.
357	>	*/
358	>	public void testResetAfterInterrupt() throws Exception {
359	>	final CyclicBarrier barrier = new CyclicBarrier(3);
360	>	for (int i = 0; i < 2; i++) {
361	>	final CyclicBarrier start = new CyclicBarrier(3);
362	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
363	>	public void realRun() throws Exception {
364	>	start.await();
365	>	barrier.await();
366	>	}};
367	>
368	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
369	>	public void realRun() throws Exception {
370	>	start.await();
371	>	barrier.await();
372	>	}};
373	>
374	>	t1.start();
375	>	t2.start();
376	>	start.await();
377	>	t1.interrupt();
378	>	awaitTermination(t1);
379	>	awaitTermination(t2);
380	>	assertTrue(barrier.isBroken());
381	>	assertEquals(0, barrier.getNumberWaiting());
382	>	barrier.reset();
383	>	assertFalse(barrier.isBroken());
384	>	assertEquals(0, barrier.getNumberWaiting());
385	>	}
386	>	}
387	>
388	>	/**
389	>	* Reset of a barrier after timeout reinitializes it.
390	>	*/
391	>	public void testResetAfterTimeout() throws Exception {
392	>	final CyclicBarrier barrier = new CyclicBarrier(3);
393	>	for (int i = 0; i < 2; i++) {
394	>	assertEquals(0, barrier.getNumberWaiting());
395	>	Thread t1 = newStartedThread(new CheckedRunnable() {
396	>	public void realRun() throws Exception {
397	>	try {
398	>	barrier.await();
399	>	shouldThrow();
400	>	} catch (BrokenBarrierException success) {}
401	>	}});
402	>	Thread t2 = newStartedThread(new CheckedRunnable() {
403	>	public void realRun() throws Exception {
404	>	awaitNumberWaiting(barrier, 1);
405	>	long startTime = System.nanoTime();
406	>	try {
407	>	barrier.await(timeoutMillis(), MILLISECONDS);
408	>	shouldThrow();
409	>	} catch (TimeoutException success) {}
410	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
411	>	}});
412	>
413	>	awaitTermination(t1);
414	>	awaitTermination(t2);
415	>	assertEquals(0, barrier.getNumberWaiting());
416	>	assertTrue(barrier.isBroken());
417	>	assertEquals(0, barrier.getNumberWaiting());
418	>	barrier.reset();
419	>	assertFalse(barrier.isBroken());
420	>	assertEquals(0, barrier.getNumberWaiting());
421	>	}
422	>	}
423	>
424	>	/**
425	>	* Reset of a barrier after a failed command reinitializes it.
426	>	*/
427	>	public void testResetAfterCommandException() throws Exception {
428	>	final CyclicBarrier barrier =
429	>	new CyclicBarrier(3, new Runnable() {
430	>	public void run() {
431	>	throw new NullPointerException(); }});
432	>	for (int i = 0; i < 2; i++) {
433	>	final CyclicBarrier start = new CyclicBarrier(3);
434	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
435	>	public void realRun() throws Exception {
436	>	start.await();
437	>	barrier.await();
438	>	}};
439	>
440	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
441	>	public void realRun() throws Exception {
442	>	start.await();
443	>	barrier.await();
444	>	}};
445	>
446		t1.start();
447		t2.start();
448	<	c.await();
449	<	t1.join();
450	<	t2.join();
451	<	} catch(Exception e){
452	<	unexpectedException();
448	>	start.await();
449	>	awaitNumberWaiting(barrier, 2);
450	>	try {
451	>	barrier.await();
452	>	shouldThrow();
453	>	} catch (NullPointerException success) {}
454	>	awaitTermination(t1);
455	>	awaitTermination(t2);
456	>	assertTrue(barrier.isBroken());
457	>	assertEquals(0, barrier.getNumberWaiting());
458	>	barrier.reset();
459	>	assertFalse(barrier.isBroken());
460	>	assertEquals(0, barrier.getNumberWaiting());
461		}
462		}
375	–
463		}

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