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

Comparing jsr166/src/test/tck/CyclicBarrierTest.java (file contents):
Revision 1.5 by dl, Sun Oct 5 23:00:40 2003 UTC vs.
Revision 1.26 by jsr166, Wed Dec 31 19:05:42 2014 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	>
17	>	import junit.framework.Test;
18	>	import junit.framework.TestSuite;
19	>
20	>	public class CyclicBarrierTest extends JSR166TestCase {
21		public static void main(String[] args) {
22	<	junit.textui.TestRunner.run (suite());
22	>	junit.textui.TestRunner.run(suite());
23		}
24		public static Test suite() {
25	<	return new TestSuite(CyclicBarrierTest.class);
25	>	return new TestSuite(CyclicBarrierTest.class);
26		}
27
28		private volatile int countAction;
29		private class MyAction implements Runnable {
30		public void run() { ++countAction; }
31		}
32	<
32	>
33	>	/**
34	>	* Spin-waits till the number of waiters == numberOfWaiters.
35	>	*/
36	>	void awaitNumberWaiting(CyclicBarrier barrier, int numberOfWaiters) {
37	>	long startTime = System.nanoTime();
38	>	while (barrier.getNumberWaiting() != numberOfWaiters) {
39	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
40	>	fail("timed out");
41	>	Thread.yield();
42	>	}
43	>	}
44	>
45		/**
46		* Creating with negative parties throws IAE
47		*/
#	Line 29 | Line 49 | public class CyclicBarrierTest extends J
49		try {
50		new CyclicBarrier(-1, (Runnable)null);
51		shouldThrow();
52	<	} catch(IllegalArgumentException e){}
52	>	} catch (IllegalArgumentException success) {}
53		}
54
55		/**
#	Line 39 | Line 59 | public class CyclicBarrierTest extends J
59		try {
60		new CyclicBarrier(-1);
61		shouldThrow();
62	<	} catch(IllegalArgumentException e){}
62	>	} catch (IllegalArgumentException success) {}
63		}
64
65		/**
#	Line 47 | Line 67 | public class CyclicBarrierTest extends J
67		*/
68		public void testGetParties() {
69		CyclicBarrier b = new CyclicBarrier(2);
70	<	assertEquals(2, b.getParties());
70	>	assertEquals(2, b.getParties());
71		assertEquals(0, b.getNumberWaiting());
72		}
73
74		/**
75		* A 1-party barrier triggers after single await
76		*/
77	<	public void testSingleParty() {
78	<	try {
79	<	CyclicBarrier b = new CyclicBarrier(1);
80	<	assertEquals(1, b.getParties());
81	<	assertEquals(0, b.getNumberWaiting());
82	<	b.await();
83	<	b.await();
64	<	assertEquals(0, b.getNumberWaiting());
65	<	}
66	<	catch(Exception e) {
67	<	unexpectedException();
68	<	}
77	>	public void testSingleParty() throws Exception {
78	>	CyclicBarrier b = new CyclicBarrier(1);
79	>	assertEquals(1, b.getParties());
80	>	assertEquals(0, b.getNumberWaiting());
81	>	b.await();
82	>	b.await();
83	>	assertEquals(0, b.getNumberWaiting());
84		}
85	<
85	>
86		/**
87		* The supplied barrier action is run at barrier
88		*/
89	<	public void testBarrierAction() {
90	<	try {
91	<	countAction = 0;
92	<	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
93	<	assertEquals(1, b.getParties());
94	<	assertEquals(0, b.getNumberWaiting());
95	<	b.await();
96	<	b.await();
97	<	assertEquals(0, b.getNumberWaiting());
83	<	assertEquals(countAction, 2);
84	<	}
85	<	catch(Exception e) {
86	<	unexpectedException();
87	<	}
89	>	public void testBarrierAction() throws Exception {
90	>	countAction = 0;
91	>	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
92	>	assertEquals(1, b.getParties());
93	>	assertEquals(0, b.getNumberWaiting());
94	>	b.await();
95	>	b.await();
96	>	assertEquals(0, b.getNumberWaiting());
97	>	assertEquals(2, countAction);
98		}
99
100		/**
101		* A 2-party/thread barrier triggers after both threads invoke await
102		*/
103	<	public void testTwoParties() {
103	>	public void testTwoParties() throws Exception {
104		final CyclicBarrier b = new CyclicBarrier(2);
105	<	Thread t = new Thread(new Runnable() {
106	<	public void run() {
107	<	try {
108	<	b.await();
109	<	b.await();
110	<	b.await();
111	<	b.await();
112	<	} catch(Exception e){
113	<	threadUnexpectedException();
114	<	}}});
115	<
116	<	try {
117	<	t.start();
108	<	b.await();
109	<	b.await();
110	<	b.await();
111	<	b.await();
112	<	t.join();
113	<	} catch(Exception e){
114	<	unexpectedException();
115	<	}
105	>	Thread t = newStartedThread(new CheckedRunnable() {
106	>	public void realRun() throws Exception {
107	>	b.await();
108	>	b.await();
109	>	b.await();
110	>	b.await();
111	>	}});
112	>
113	>	b.await();
114	>	b.await();
115	>	b.await();
116	>	b.await();
117	>	awaitTermination(t);
118		}
119
118	–
120		/**
121		* An interruption in one party causes others waiting in await to
122		* throw BrokenBarrierException
123		*/
124		public void testAwait1_Interrupted_BrokenBarrier() {
125		final CyclicBarrier c = new CyclicBarrier(3);
126	<	Thread t1 = new Thread(new Runnable() {
127	<	public void run() {
128	<	try {
129	<	c.await();
130	<	threadShouldThrow();
131	<	} catch(InterruptedException success){}
132	<	catch(Exception b){
133	<	threadUnexpectedException();
134	<	}
135	<	}
136	<	});
137	<	Thread t2 = new Thread(new Runnable() {
138	<	public void run() {
139	<	try {
140	<	c.await();
141	<	threadShouldThrow();
142	<	} catch(BrokenBarrierException success){
143	<	} 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	<	}
126	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
127	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
128	>	public void realRun() throws Exception {
129	>	pleaseInterrupt.countDown();
130	>	c.await();
131	>	}};
132	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
133	>	public void realRun() throws Exception {
134	>	pleaseInterrupt.countDown();
135	>	c.await();
136	>	}};
137	>
138	>	t1.start();
139	>	t2.start();
140	>	await(pleaseInterrupt);
141	>	t1.interrupt();
142	>	awaitTermination(t1);
143	>	awaitTermination(t2);
144		}
145
146		/**
147		* An interruption in one party causes others waiting in timed await to
148		* throw BrokenBarrierException
149		*/
150	<	public void testAwait2_Interrupted_BrokenBarrier() {
151	<	final CyclicBarrier c = new CyclicBarrier(3);
152	<	Thread t1 = new Thread(new Runnable() {
153	<	public void run() {
154	<	try {
155	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
156	<	threadShouldThrow();
157	<	} catch(InterruptedException success){
158	<	} catch(Exception b){
159	<	threadUnexpectedException();
160	<	}
161	<	}
162	<	});
163	<	Thread t2 = new Thread(new Runnable() {
164	<	public void run() {
165	<	try {
166	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
167	<	threadShouldThrow();
168	<	} catch(BrokenBarrierException success){
169	<	} 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	<	}
150	>	public void testAwait2_Interrupted_BrokenBarrier() throws Exception {
151	>	final CyclicBarrier c = new CyclicBarrier(3);
152	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
153	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
154	>	public void realRun() throws Exception {
155	>	pleaseInterrupt.countDown();
156	>	c.await(LONG_DELAY_MS, MILLISECONDS);
157	>	}};
158	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
159	>	public void realRun() throws Exception {
160	>	pleaseInterrupt.countDown();
161	>	c.await(LONG_DELAY_MS, MILLISECONDS);
162	>	}};
163	>
164	>	t1.start();
165	>	t2.start();
166	>	await(pleaseInterrupt);
167	>	t1.interrupt();
168	>	awaitTermination(t1);
169	>	awaitTermination(t2);
170		}
171	<
171	>
172		/**
173		* A timeout in timed await throws TimeoutException
174		*/
175	<	public void testAwait3_TimeOutException() {
175	>	public void testAwait3_TimeoutException() throws InterruptedException {
176		final CyclicBarrier c = new CyclicBarrier(2);
177	<	Thread t = new Thread(new Runnable() {
178	<	public void run() {
179	<	try {
180	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
181	<	threadShouldThrow();
182	<	} catch(TimeoutException success){
183	<	} catch(Exception b){
184	<	threadUnexpectedException();
185	<
186	<	}
187	<	}
215	<	});
216	<	try {
217	<	t.start();
218	<	t.join();
219	<	} catch(InterruptedException e){
220	<	unexpectedException();
221	<	}
177	>	Thread t = newStartedThread(new CheckedRunnable() {
178	>	public void realRun() throws Exception {
179	>	long startTime = System.nanoTime();
180	>	try {
181	>	c.await(timeoutMillis(), MILLISECONDS);
182	>	shouldThrow();
183	>	} catch (TimeoutException success) {}
184	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
185	>	}});
186	>
187	>	awaitTermination(t);
188		}
189
190		/**
191		* A timeout in one party causes others waiting in timed await to
192		* throw BrokenBarrierException
193		*/
194	<	public void testAwait4_Timeout_BrokenBarrier() {
195	<	final CyclicBarrier c = new CyclicBarrier(3);
196	<	Thread t1 = new Thread(new Runnable() {
197	<	public void run() {
198	<	try {
199	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
200	<	threadShouldThrow();
201	<	} catch(TimeoutException success){
202	<	} catch(Exception b){
203	<	threadUnexpectedException();
204	<	}
205	<	}
206	<	});
207	<	Thread t2 = new Thread(new Runnable() {
208	<	public void run() {
209	<	try {
210	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
211	<	threadShouldThrow();
212	<	} catch(BrokenBarrierException success){
213	<	} catch(Exception i){
214	<	threadUnexpectedException();
215	<	}
250	<	}
251	<	});
252	<	try {
253	<	t1.start();
254	<	t2.start();
255	<	t1.join();
256	<	t2.join();
257	<	} catch(InterruptedException e){
258	<	unexpectedException();
259	<	}
194	>	public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException {
195	>	final CyclicBarrier c = new CyclicBarrier(3);
196	>	Thread t1 = newStartedThread(new CheckedRunnable() {
197	>	public void realRun() throws Exception {
198	>	try {
199	>	c.await(LONG_DELAY_MS, MILLISECONDS);
200	>	shouldThrow();
201	>	} catch (BrokenBarrierException success) {}
202	>	}});
203	>	Thread t2 = newStartedThread(new CheckedRunnable() {
204	>	public void realRun() throws Exception {
205	>	awaitNumberWaiting(c, 1);
206	>	long startTime = System.nanoTime();
207	>	try {
208	>	c.await(timeoutMillis(), MILLISECONDS);
209	>	shouldThrow();
210	>	} catch (TimeoutException success) {}
211	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
212	>	}});
213	>
214	>	awaitTermination(t1);
215	>	awaitTermination(t2);
216		}
217
218		/**
219		* A timeout in one party causes others waiting in await to
220		* throw BrokenBarrierException
221		*/
222	<	public void testAwait5_Timeout_BrokenBarrier() {
223	<	final CyclicBarrier c = new CyclicBarrier(3);
224	<	Thread t1 = new Thread(new Runnable() {
225	<	public void run() {
226	<	try {
227	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
228	<	threadShouldThrow();
229	<	} catch(TimeoutException success){
230	<	} catch(Exception b){
231	<	threadUnexpectedException();
232	<	}
233	<	}
234	<	});
235	<	Thread t2 = new Thread(new Runnable() {
236	<	public void run() {
237	<	try {
238	<	c.await();
239	<	threadShouldThrow();
240	<	} catch(BrokenBarrierException success){
241	<	} catch(Exception i){
242	<	threadUnexpectedException();
243	<	}
288	<	}
289	<	});
290	<	try {
291	<	t1.start();
292	<	t2.start();
293	<	t1.join();
294	<	t2.join();
295	<	} catch(InterruptedException e){
296	<	unexpectedException();
297	<	}
222	>	public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException {
223	>	final CyclicBarrier c = new CyclicBarrier(3);
224	>	Thread t1 = newStartedThread(new CheckedRunnable() {
225	>	public void realRun() throws Exception {
226	>	try {
227	>	c.await();
228	>	shouldThrow();
229	>	} catch (BrokenBarrierException success) {}
230	>	}});
231	>	Thread t2 = newStartedThread(new CheckedRunnable() {
232	>	public void realRun() throws Exception {
233	>	awaitNumberWaiting(c, 1);
234	>	long startTime = System.nanoTime();
235	>	try {
236	>	c.await(timeoutMillis(), MILLISECONDS);
237	>	shouldThrow();
238	>	} catch (TimeoutException success) {}
239	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
240	>	}});
241	>
242	>	awaitTermination(t1);
243	>	awaitTermination(t2);
244		}
245	<
245	>
246		/**
247		* A reset of an active barrier causes waiting threads to throw
248		* BrokenBarrierException
249		*/
250	<	public void testReset_BrokenBarrier() {
250	>	public void testReset_BrokenBarrier() throws InterruptedException {
251		final CyclicBarrier c = new CyclicBarrier(3);
252	<	Thread t1 = new Thread(new Runnable() {
253	<	public void run() {
254	<	try {
255	<	c.await();
256	<	threadShouldThrow();
257	<	} catch(BrokenBarrierException success){}
258	<	catch(Exception b){
259	<	threadUnexpectedException();
260	<	}
261	<	}
262	<	});
263	<	Thread t2 = new Thread(new Runnable() {
264	<	public void run() {
265	<	try {
266	<	c.await();
267	<	threadShouldThrow();
268	<	} catch(BrokenBarrierException success){
269	<	} catch(Exception i){
270	<	threadUnexpectedException();
271	<	}
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	<	}
252	>	final CountDownLatch pleaseReset = new CountDownLatch(2);
253	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
254	>	public void realRun() throws Exception {
255	>	pleaseReset.countDown();
256	>	c.await();
257	>	}};
258	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
259	>	public void realRun() throws Exception {
260	>	pleaseReset.countDown();
261	>	c.await();
262	>	}};
263	>
264	>	t1.start();
265	>	t2.start();
266	>	await(pleaseReset);
267	>
268	>	awaitNumberWaiting(c, 2);
269	>	c.reset();
270	>	awaitTermination(t1);
271	>	awaitTermination(t2);
272		}
273
274		/**
275		* A reset before threads enter barrier does not throw
276		* BrokenBarrierException
277		*/
278	<	public void testReset_NoBrokenBarrier() {
278	>	public void testReset_NoBrokenBarrier() throws Exception {
279		final CyclicBarrier c = new CyclicBarrier(3);
280	<	Thread t1 = new Thread(new Runnable() {
281	<	public void run() {
282	<	try {
283	<	c.await();
284	<	} catch(Exception b){
285	<	threadUnexpectedException();
286	<	}
287	<	}
288	<	});
289	<	Thread t2 = new Thread(new Runnable() {
290	<	public void run() {
280	>	c.reset();
281	>
282	>	Thread t1 = newStartedThread(new CheckedRunnable() {
283	>	public void realRun() throws Exception {
284	>	c.await();
285	>	}});
286	>	Thread t2 = newStartedThread(new CheckedRunnable() {
287	>	public void realRun() throws Exception {
288	>	c.await();
289	>	}});
290	>
291	>	c.await();
292	>	awaitTermination(t1);
293	>	awaitTermination(t2);
294	>	}
295	>
296	>	/**
297	>	* All threads block while a barrier is broken.
298	>	*/
299	>	public void testReset_Leakage() throws InterruptedException {
300	>	final CyclicBarrier c = new CyclicBarrier(2);
301	>	final AtomicBoolean done = new AtomicBoolean();
302	>	Thread t = newStartedThread(new CheckedRunnable() {
303	>	public void realRun() {
304	>	while (!done.get()) {
305		try {
306	+	while (c.isBroken())
307	+	c.reset();
308	+
309		c.await();
310	<	} catch(Exception i){
360	<	threadUnexpectedException();
310	>	shouldThrow();
311		}
312	<	}
313	<	});
314	<	try {
315	<	c.reset();
312	>	catch (BrokenBarrierException ok) {}
313	>	catch (InterruptedException ok) {}
314	>	}}});
315	>
316	>	for (int i = 0; i < 4; i++) {
317	>	delay(timeoutMillis());
318	>	t.interrupt();
319	>	}
320	>	done.set(true);
321	>	t.interrupt();
322	>	awaitTermination(t);
323	>	}
324	>
325	>	/**
326	>	* Reset of a non-broken barrier does not break barrier
327	>	*/
328	>	public void testResetWithoutBreakage() throws Exception {
329	>	final CyclicBarrier barrier = new CyclicBarrier(3);
330	>	for (int i = 0; i < 3; i++) {
331	>	final CyclicBarrier start = new CyclicBarrier(3);
332	>	Thread t1 = newStartedThread(new CheckedRunnable() {
333	>	public void realRun() throws Exception {
334	>	start.await();
335	>	barrier.await();
336	>	}});
337	>
338	>	Thread t2 = newStartedThread(new CheckedRunnable() {
339	>	public void realRun() throws Exception {
340	>	start.await();
341	>	barrier.await();
342	>	}});
343	>
344	>	start.await();
345	>	barrier.await();
346	>	awaitTermination(t1);
347	>	awaitTermination(t2);
348	>	assertFalse(barrier.isBroken());
349	>	assertEquals(0, barrier.getNumberWaiting());
350	>	if (i == 1) barrier.reset();
351	>	assertFalse(barrier.isBroken());
352	>	assertEquals(0, barrier.getNumberWaiting());
353	>	}
354	>	}
355	>
356	>	/**
357	>	* Reset of a barrier after interruption reinitializes it.
358	>	*/
359	>	public void testResetAfterInterrupt() throws Exception {
360	>	final CyclicBarrier barrier = new CyclicBarrier(3);
361	>	for (int i = 0; i < 2; i++) {
362	>	final CyclicBarrier start = new CyclicBarrier(3);
363	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
364	>	public void realRun() throws Exception {
365	>	start.await();
366	>	barrier.await();
367	>	}};
368	>
369	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
370	>	public void realRun() throws Exception {
371	>	start.await();
372	>	barrier.await();
373	>	}};
374	>
375	>	t1.start();
376	>	t2.start();
377	>	start.await();
378	>	t1.interrupt();
379	>	awaitTermination(t1);
380	>	awaitTermination(t2);
381	>	assertTrue(barrier.isBroken());
382	>	assertEquals(0, barrier.getNumberWaiting());
383	>	barrier.reset();
384	>	assertFalse(barrier.isBroken());
385	>	assertEquals(0, barrier.getNumberWaiting());
386	>	}
387	>	}
388	>
389	>	/**
390	>	* Reset of a barrier after timeout reinitializes it.
391	>	*/
392	>	public void testResetAfterTimeout() throws Exception {
393	>	final CyclicBarrier barrier = new CyclicBarrier(3);
394	>	for (int i = 0; i < 2; i++) {
395	>	assertEquals(0, barrier.getNumberWaiting());
396	>	Thread t1 = newStartedThread(new CheckedRunnable() {
397	>	public void realRun() throws Exception {
398	>	try {
399	>	barrier.await();
400	>	shouldThrow();
401	>	} catch (BrokenBarrierException success) {}
402	>	}});
403	>	Thread t2 = newStartedThread(new CheckedRunnable() {
404	>	public void realRun() throws Exception {
405	>	awaitNumberWaiting(barrier, 1);
406	>	long startTime = System.nanoTime();
407	>	try {
408	>	barrier.await(timeoutMillis(), MILLISECONDS);
409	>	shouldThrow();
410	>	} catch (TimeoutException success) {}
411	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
412	>	}});
413	>
414	>	awaitTermination(t1);
415	>	awaitTermination(t2);
416	>	assertEquals(0, barrier.getNumberWaiting());
417	>	assertTrue(barrier.isBroken());
418	>	assertEquals(0, barrier.getNumberWaiting());
419	>	barrier.reset();
420	>	assertFalse(barrier.isBroken());
421	>	assertEquals(0, barrier.getNumberWaiting());
422	>	}
423	>	}
424	>
425	>	/**
426	>	* Reset of a barrier after a failed command reinitializes it.
427	>	*/
428	>	public void testResetAfterCommandException() throws Exception {
429	>	final CyclicBarrier barrier =
430	>	new CyclicBarrier(3, new Runnable() {
431	>	public void run() {
432	>	throw new NullPointerException(); }});
433	>	for (int i = 0; i < 2; i++) {
434	>	final CyclicBarrier start = new CyclicBarrier(3);
435	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
436	>	public void realRun() throws Exception {
437	>	start.await();
438	>	barrier.await();
439	>	}};
440	>
441	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
442	>	public void realRun() throws Exception {
443	>	start.await();
444	>	barrier.await();
445	>	}};
446	>
447		t1.start();
448		t2.start();
449	<	c.await();
450	<	t1.join();
451	<	t2.join();
452	<	} catch(Exception e){
453	<	unexpectedException();
449	>	start.await();
450	>	awaitNumberWaiting(barrier, 2);
451	>	try {
452	>	barrier.await();
453	>	shouldThrow();
454	>	} catch (NullPointerException success) {}
455	>	awaitTermination(t1);
456	>	awaitTermination(t2);
457	>	assertTrue(barrier.isBroken());
458	>	assertEquals(0, barrier.getNumberWaiting());
459	>	barrier.reset();
460	>	assertFalse(barrier.isBroken());
461	>	assertEquals(0, barrier.getNumberWaiting());
462		}
463		}
375	–
464		}

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