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

Comparing jsr166/src/test/tck/CyclicBarrierTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:54 2003 UTC vs.
Revision 1.19 by jsr166, Sun May 15 16:56:41 2011 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.*;
10		import java.util.*;
11		import java.util.concurrent.*;
12	+	import java.util.concurrent.locks.*;
13	+	import java.util.concurrent.atomic.*;
14	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
15
16	<	public class CyclicBarrierTest extends TestCase{
13	<
16	>	public class CyclicBarrierTest extends JSR166TestCase {
17		public static void main(String[] args) {
18	<	junit.textui.TestRunner.run (suite());
18	>	junit.textui.TestRunner.run(suite());
19		}
17	–
18	–
20		public static Test suite() {
21	<	return new TestSuite(CyclicBarrierTest.class);
21	>	return new TestSuite(CyclicBarrierTest.class);
22		}
22	–
23	–	private static long SHORT_DELAY_MS = 100;
24	–	private static long MEDIUM_DELAY_MS = 1000;
25	–	private static long LONG_DELAY_MS = 10000;
23
24	<	public void testConstructor1(){
25	<	try{
24	>	private volatile int countAction;
25	>	private class MyAction implements Runnable {
26	>	public void run() { ++countAction; }
27	>	}
28	>
29	>	/**
30	>	* Creating with negative parties throws IAE
31	>	*/
32	>	public void testConstructor1() {
33	>	try {
34		new CyclicBarrier(-1, (Runnable)null);
35	<	fail("should throw");
36	<	} catch(IllegalArgumentException e){}
35	>	shouldThrow();
36	>	} catch (IllegalArgumentException success) {}
37		}
38
39	<	public void testConstructor2(){
40	<	try{
39	>	/**
40	>	* Creating with negative parties and no action throws IAE
41	>	*/
42	>	public void testConstructor2() {
43	>	try {
44		new CyclicBarrier(-1);
45	<	fail("should throw");
46	<	} catch(IllegalArgumentException e){}
45	>	shouldThrow();
46	>	} catch (IllegalArgumentException success) {}
47		}
48
49	<	public void testConstructor3(){
49	>	/**
50	>	* getParties returns the number of parties given in constructor
51	>	*/
52	>	public void testGetParties() {
53		CyclicBarrier b = new CyclicBarrier(2);
54	<	assertEquals(2, b.getParties());
54	>	assertEquals(2, b.getParties());
55		assertEquals(0, b.getNumberWaiting());
56		}
57
58	<	public void testSingleParty() {
59	<	try {
60	<	CyclicBarrier b = new CyclicBarrier(1);
61	<	assertEquals(1, b.getParties());
62	<	assertEquals(0, b.getNumberWaiting());
63	<	b.await();
64	<	b.await();
65	<	assertEquals(0, b.getNumberWaiting());
66	<	}
67	<	catch(Exception e) {
57	<	fail("unexpected exception");
58	<	}
59	<	}
60	<
61	<	private volatile int countAction;
62	<	private class MyAction implements Runnable {
63	<	public void run() { ++countAction; }
58	>	/**
59	>	* A 1-party barrier triggers after single await
60	>	*/
61	>	public void testSingleParty() throws Exception {
62	>	CyclicBarrier b = new CyclicBarrier(1);
63	>	assertEquals(1, b.getParties());
64	>	assertEquals(0, b.getNumberWaiting());
65	>	b.await();
66	>	b.await();
67	>	assertEquals(0, b.getNumberWaiting());
68		}
69
70	<	public void testBarrierAction() {
71	<	try {
72	<	countAction = 0;
73	<	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
74	<	assertEquals(1, b.getParties());
75	<	assertEquals(0, b.getNumberWaiting());
76	<	b.await();
77	<	b.await();
78	<	assertEquals(0, b.getNumberWaiting());
79	<	assertEquals(countAction, 2);
80	<	}
81	<	catch(Exception e) {
78	<	fail("unexpected exception");
79	<	}
70	>	/**
71	>	* The supplied barrier action is run at barrier
72	>	*/
73	>	public void testBarrierAction() throws Exception {
74	>	countAction = 0;
75	>	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
76	>	assertEquals(1, b.getParties());
77	>	assertEquals(0, b.getNumberWaiting());
78	>	b.await();
79	>	b.await();
80	>	assertEquals(0, b.getNumberWaiting());
81	>	assertEquals(countAction, 2);
82		}
83
84	<
85	<	public void testTwoParties(){
84	>	/**
85	>	* A 2-party/thread barrier triggers after both threads invoke await
86	>	*/
87	>	public void testTwoParties() throws Exception {
88		final CyclicBarrier b = new CyclicBarrier(2);
89	<	Thread t = new Thread(new Runnable() {
90	<	public void run(){
91	<	try {
92	<	b.await();
93	<	b.await();
94	<	b.await();
95	<	b.await();
96	<	} catch(Exception e){
97	<	fail("unexpected exception");
98	<	}}});
99	<
100	<	try {
101	<	t.start();
102	<	b.await();
99	<	b.await();
100	<	b.await();
101	<	b.await();
102	<	t.join();
103	<	} catch(Exception e){
104	<	fail("unexpected exception");
105	<	}
89	>	Thread t = new Thread(new CheckedRunnable() {
90	>	public void realRun() throws Exception {
91	>	b.await();
92	>	b.await();
93	>	b.await();
94	>	b.await();
95	>	}});
96	>
97	>	t.start();
98	>	b.await();
99	>	b.await();
100	>	b.await();
101	>	b.await();
102	>	t.join();
103		}
104
105
106	<	public void testAwait1_Interrupted_BrokenBarrier(){
106	>	/**
107	>	* An interruption in one party causes others waiting in await to
108	>	* throw BrokenBarrierException
109	>	*/
110	>	public void testAwait1_Interrupted_BrokenBarrier() throws Exception {
111		final CyclicBarrier c = new CyclicBarrier(3);
112	<	Thread t1 = new Thread(new Runnable() {
113	<	public void run(){
114	<	try{
115	<	c.await();
116	<	fail("should throw");
117	<	} catch(InterruptedException success){}
118	<	catch(Exception b){
119	<	fail("should throw IE");
120	<	}
121	<	}
122	<	});
123	<	Thread t2 = new Thread(new Runnable(){
124	<	public void run(){
125	<	try{
126	<	c.await();
127	<	fail("should throw");
128	<	} catch(BrokenBarrierException success){
129	<	} catch(Exception i){
130	<	fail("should throw BBE");
112	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
113	>	public void realRun() throws Exception {
114	>	c.await();
115	>	}};
116	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
117	>	public void realRun() throws Exception {
118	>	c.await();
119	>	}};
120	>
121	>	t1.start();
122	>	t2.start();
123	>	delay(SHORT_DELAY_MS);
124	>	t1.interrupt();
125	>	t1.join();
126	>	t2.join();
127	>	}
128	>
129	>	/**
130	>	* An interruption in one party causes others waiting in timed await to
131	>	* throw BrokenBarrierException
132	>	*/
133	>	public void testAwait2_Interrupted_BrokenBarrier() throws Exception {
134	>	final CyclicBarrier c = new CyclicBarrier(3);
135	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
136	>	public void realRun() throws Exception {
137	>	c.await(LONG_DELAY_MS, MILLISECONDS);
138	>	}};
139	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
140	>	public void realRun() throws Exception {
141	>	c.await(LONG_DELAY_MS, MILLISECONDS);
142	>	}};
143	>
144	>	t1.start();
145	>	t2.start();
146	>	delay(SHORT_DELAY_MS);
147	>	t1.interrupt();
148	>	t1.join();
149	>	t2.join();
150	>	}
151	>
152	>	/**
153	>	* A timeout in timed await throws TimeoutException
154	>	*/
155	>	public void testAwait3_TimeoutException() throws InterruptedException {
156	>	final CyclicBarrier c = new CyclicBarrier(2);
157	>	Thread t = new ThreadShouldThrow(TimeoutException.class) {
158	>	public void realRun() throws Exception {
159	>	c.await(SHORT_DELAY_MS, MILLISECONDS);
160	>	}};
161	>
162	>	t.start();
163	>	t.join();
164	>	}
165	>
166	>	/**
167	>	* A timeout in one party causes others waiting in timed await to
168	>	* throw BrokenBarrierException
169	>	*/
170	>	public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException {
171	>	final CyclicBarrier c = new CyclicBarrier(3);
172	>	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
173	>	public void realRun() throws Exception {
174	>	c.await(SHORT_DELAY_MS, MILLISECONDS);
175	>	}};
176	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
177	>	public void realRun() throws Exception {
178	>	c.await(MEDIUM_DELAY_MS, MILLISECONDS);
179	>	}};
180	>
181	>	t1.start();
182	>	t2.start();
183	>	t1.join();
184	>	t2.join();
185	>	}
186	>
187	>	/**
188	>	* A timeout in one party causes others waiting in await to
189	>	* throw BrokenBarrierException
190	>	*/
191	>	public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException {
192	>	final CyclicBarrier c = new CyclicBarrier(3);
193	>	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
194	>	public void realRun() throws Exception {
195	>	c.await(SHORT_DELAY_MS, MILLISECONDS);
196	>	}};
197	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
198	>	public void realRun() throws Exception {
199	>	c.await();
200	>	}};
201	>
202	>	t1.start();
203	>	t2.start();
204	>	t1.join();
205	>	t2.join();
206	>	}
207	>
208	>	/**
209	>	* A reset of an active barrier causes waiting threads to throw
210	>	* BrokenBarrierException
211	>	*/
212	>	public void testReset_BrokenBarrier() throws InterruptedException {
213	>	final CyclicBarrier c = new CyclicBarrier(3);
214	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
215	>	public void realRun() throws Exception {
216	>	c.await();
217	>	}};
218	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
219	>	public void realRun() throws Exception {
220	>	c.await();
221	>	}};
222	>
223	>	t1.start();
224	>	t2.start();
225	>	delay(SHORT_DELAY_MS);
226	>	c.reset();
227	>	t1.join();
228	>	t2.join();
229	>	}
230	>
231	>	/**
232	>	* A reset before threads enter barrier does not throw
233	>	* BrokenBarrierException
234	>	*/
235	>	public void testReset_NoBrokenBarrier() throws Exception {
236	>	final CyclicBarrier c = new CyclicBarrier(3);
237	>	Thread t1 = new Thread(new CheckedRunnable() {
238	>	public void realRun() throws Exception {
239	>	c.await();
240	>	}});
241	>	Thread t2 = new Thread(new CheckedRunnable() {
242	>	public void realRun() throws Exception {
243	>	c.await();
244	>	}});
245	>
246	>	c.reset();
247	>	t1.start();
248	>	t2.start();
249	>	c.await();
250	>	t1.join();
251	>	t2.join();
252	>	}
253	>
254	>	/**
255	>	* All threads block while a barrier is broken.
256	>	*/
257	>	public void testReset_Leakage() throws InterruptedException {
258	>	final CyclicBarrier c = new CyclicBarrier(2);
259	>	final AtomicBoolean done = new AtomicBoolean();
260	>	Thread t = new Thread() {
261	>	public void run() {
262	>	while (!done.get()) {
263	>	try {
264	>	while (c.isBroken())
265	>	c.reset();
266	>
267	>	c.await();
268	>	threadFail("await should not return");
269	>	}
270	>	catch (BrokenBarrierException e) {
271	>	}
272	>	catch (InterruptedException ie) {
273	>	}
274		}
275		}
276	<	});
277	<	try {
276	>	};
277	>
278	>	t.start();
279	>	for (int i = 0; i < 4; i++) {
280	>	delay(SHORT_DELAY_MS);
281	>	t.interrupt();
282	>	}
283	>	done.set(true);
284	>	t.interrupt();
285	>	t.join();
286	>	}
287	>
288	>	/**
289	>	* Reset of a non-broken barrier does not break barrier
290	>	*/
291	>	public void testResetWithoutBreakage() throws Exception {
292	>	final CyclicBarrier start = new CyclicBarrier(3);
293	>	final CyclicBarrier barrier = new CyclicBarrier(3);
294	>	for (int i = 0; i < 3; i++) {
295	>	Thread t1 = new Thread(new CheckedRunnable() {
296	>	public void realRun() throws Exception {
297	>	start.await();
298	>	barrier.await();
299	>	}});
300	>
301	>	Thread t2 = new Thread(new CheckedRunnable() {
302	>	public void realRun() throws Exception {
303	>	start.await();
304	>	barrier.await();
305	>	}});
306	>
307		t1.start();
308		t2.start();
309	<	Thread.sleep(SHORT_DELAY_MS);
310	<	t1.interrupt();
311	<	t1.join();
309	>	start.await();
310	>	barrier.await();
311	>	t1.join();
312		t2.join();
313	<	} catch(InterruptedException e){
314	<	fail("unexpected exception");
313	>	assertFalse(barrier.isBroken());
314	>	assertEquals(0, barrier.getNumberWaiting());
315	>	if (i == 1) barrier.reset();
316	>	assertFalse(barrier.isBroken());
317	>	assertEquals(0, barrier.getNumberWaiting());
318		}
319		}
320
321	<	public void testAwait2_Interrupted_BrokenBarrier(){
322	<	final CyclicBarrier c = new CyclicBarrier(3);
323	<	Thread t1 = new Thread(new Runnable() {
324	<	public void run(){
325	<	try{
326	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
327	<	fail("should throw");
328	<	} catch(InterruptedException success){
329	<	} catch(Exception b){
330	<	fail("should throw IE");
331	<	}
332	<	}
333	<	});
334	<	Thread t2 = new Thread(new Runnable(){
335	<	public void run(){
336	<	try{
337	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
338	<	fail("should throw");
339	<	} catch(BrokenBarrierException success){
164	<	} catch(Exception i){
165	<	fail("should throw BBE");
166	<	}
167	<	}
168	<	});
169	<	try {
321	>	/**
322	>	* Reset of a barrier after interruption reinitializes it.
323	>	*/
324	>	public void testResetAfterInterrupt() throws Exception {
325	>	final CyclicBarrier start = new CyclicBarrier(3);
326	>	final CyclicBarrier barrier = new CyclicBarrier(3);
327	>	for (int i = 0; i < 2; i++) {
328	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
329	>	public void realRun() throws Exception {
330	>	start.await();
331	>	barrier.await();
332	>	}};
333	>
334	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
335	>	public void realRun() throws Exception {
336	>	start.await();
337	>	barrier.await();
338	>	}};
339	>
340		t1.start();
341		t2.start();
342	<	Thread.sleep(SHORT_DELAY_MS);
342	>	start.await();
343		t1.interrupt();
344	<	t1.join();
344	>	t1.join();
345		t2.join();
346	<	} catch(InterruptedException e){
347	<	fail("unexpected exception");
346	>	assertTrue(barrier.isBroken());
347	>	assertEquals(0, barrier.getNumberWaiting());
348	>	barrier.reset();
349	>	assertFalse(barrier.isBroken());
350	>	assertEquals(0, barrier.getNumberWaiting());
351		}
352		}
353	<
354	<	public void testAwait3_TimeOutException(){
355	<	final CyclicBarrier c = new CyclicBarrier(2);
356	<	Thread t = new Thread(new Runnable() {
357	<	public void run(){
358	<	try{
359	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
360	<	fail("should throw");
361	<	} catch(TimeoutException success){
362	<	} catch(Exception b){
363	<	fail("should throw TOE");
364	<
365	<	}
366	<	}
367	<	});
368	<	try {
369	<	t.start();
370	<	t.join();
371	<	} catch(InterruptedException e){
372	<	fail("unexpected exception");
353	>
354	>	/**
355	>	* Reset of a barrier after timeout reinitializes it.
356	>	*/
357	>	public void testResetAfterTimeout() throws Exception {
358	>	final CyclicBarrier start = new CyclicBarrier(2);
359	>	final CyclicBarrier barrier = new CyclicBarrier(3);
360	>	for (int i = 0; i < 2; i++) {
361	>	Thread t1 = new ThreadShouldThrow(TimeoutException.class) {
362	>	public void realRun() throws Exception {
363	>	start.await();
364	>	barrier.await(SHORT_DELAY_MS, MILLISECONDS);
365	>	}};
366	>
367	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
368	>	public void realRun() throws Exception {
369	>	start.await();
370	>	barrier.await();
371	>	}};
372	>
373	>	t1.start();
374	>	t2.start();
375	>	t1.join();
376	>	t2.join();
377	>	assertTrue(barrier.isBroken());
378	>	assertEquals(0, barrier.getNumberWaiting());
379	>	barrier.reset();
380	>	assertFalse(barrier.isBroken());
381	>	assertEquals(0, barrier.getNumberWaiting());
382	>	}
383	>	}
384	>
385	>
386	>	/**
387	>	* Reset of a barrier after a failed command reinitializes it.
388	>	*/
389	>	public void testResetAfterCommandException() throws Exception {
390	>	final CyclicBarrier start = new CyclicBarrier(3);
391	>	final CyclicBarrier barrier =
392	>	new CyclicBarrier(3, new Runnable() {
393	>	public void run() {
394	>	throw new NullPointerException(); }});
395	>	for (int i = 0; i < 2; i++) {
396	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
397	>	public void realRun() throws Exception {
398	>	start.await();
399	>	barrier.await();
400	>	}};
401	>
402	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
403	>	public void realRun() throws Exception {
404	>	start.await();
405	>	barrier.await();
406	>	}};
407	>
408	>	t1.start();
409	>	t2.start();
410	>	start.await();
411	>	while (barrier.getNumberWaiting() < 2) { Thread.yield(); }
412	>	try {
413	>	barrier.await();
414	>	shouldThrow();
415	>	} catch (NullPointerException success) {}
416	>	t1.join();
417	>	t2.join();
418	>	assertTrue(barrier.isBroken());
419	>	assertEquals(0, barrier.getNumberWaiting());
420	>	barrier.reset();
421	>	assertFalse(barrier.isBroken());
422	>	assertEquals(0, barrier.getNumberWaiting());
423		}
424		}
202	–
425		}

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