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

Comparing jsr166/src/test/tck/ExchangerTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.17 by jsr166, Sun May 15 16:58:16 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 static java.util.concurrent.TimeUnit.MILLISECONDS;
13
14		public class ExchangerTest extends JSR166TestCase {
15	<
15	>
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run(suite());
18		}
19		public static Test suite() {
20	<	return new TestSuite(ExchangerTest.class);
20	>	return new TestSuite(ExchangerTest.class);
21		}
22
23		/**
24	<	*
24	>	* exchange exchanges objects across two threads
25		*/
26		public void testExchange() {
27		final Exchanger e = new Exchanger();
28	<	Thread t1 = new Thread(new Runnable(){
29	<	public void run(){
30	<	try {
31	<	Object v = e.exchange(one);
32	<	threadAssertEquals(v, two);
33	<	Object w = e.exchange(v);
34	<	threadAssertEquals(w, one);
35	<	} catch(InterruptedException e){
36	<	threadUnexpectedException();
37	<	}
38	<	}
39	<	});
40	<	Thread t2 = new Thread(new Runnable(){
39	<	public void run(){
40	<	try {
41	<	Object v = e.exchange(two);
42	<	threadAssertEquals(v, one);
43	<	Object w = e.exchange(v);
44	<	threadAssertEquals(w, two);
45	<	} catch(InterruptedException e){
46	<	threadUnexpectedException();
47	<	}
48	<	}
49	<	});
50	<	try {
51	<	t1.start();
52	<	t2.start();
53	<	t1.join();
54	<	t2.join();
55	<	} catch(InterruptedException ex) {
56	<	unexpectedException();
57	<	}
28	>	Thread t1 = newStartedThread(new CheckedRunnable() {
29	>	public void realRun() throws InterruptedException {
30	>	assertSame(one, e.exchange(two));
31	>	assertSame(two, e.exchange(one));
32	>	}});
33	>	Thread t2 = newStartedThread(new CheckedRunnable() {
34	>	public void realRun() throws InterruptedException {
35	>	assertSame(two, e.exchange(one));
36	>	assertSame(one, e.exchange(two));
37	>	}});
38	>
39	>	awaitTermination(t1);
40	>	awaitTermination(t2);
41		}
42
43		/**
44	<	*
44	>	* timed exchange exchanges objects across two threads
45		*/
46		public void testTimedExchange() {
47		final Exchanger e = new Exchanger();
48	<	Thread t1 = new Thread(new Runnable(){
49	<	public void run(){
50	<	try {
51	<	Object v = e.exchange(one, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
52	<	threadAssertEquals(v, two);
53	<	Object w = e.exchange(v, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
54	<	threadAssertEquals(w, one);
55	<	} catch(InterruptedException e){
56	<	threadUnexpectedException();
57	<	} catch(TimeoutException toe) {
58	<	threadUnexpectedException();
59	<	}
60	<	}
78	<	});
79	<	Thread t2 = new Thread(new Runnable(){
80	<	public void run(){
81	<	try {
82	<	Object v = e.exchange(two, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
83	<	threadAssertEquals(v, one);
84	<	Object w = e.exchange(v, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
85	<	threadAssertEquals(w, two);
86	<	} catch(InterruptedException e){
87	<	threadUnexpectedException();
88	<	} catch(TimeoutException toe) {
89	<	threadUnexpectedException();
90	<	}
91	<	}
92	<	});
93	<	try {
94	<	t1.start();
95	<	t2.start();
96	<	t1.join();
97	<	t2.join();
98	<	} catch(InterruptedException ex) {
99	<	unexpectedException();
100	<	}
48	>	Thread t1 = newStartedThread(new CheckedRunnable() {
49	>	public void realRun() throws Exception {
50	>	assertSame(one, e.exchange(two, LONG_DELAY_MS, MILLISECONDS));
51	>	assertSame(two, e.exchange(one, LONG_DELAY_MS, MILLISECONDS));
52	>	}});
53	>	Thread t2 = newStartedThread(new CheckedRunnable() {
54	>	public void realRun() throws Exception {
55	>	assertSame(two, e.exchange(one, LONG_DELAY_MS, MILLISECONDS));
56	>	assertSame(one, e.exchange(two, LONG_DELAY_MS, MILLISECONDS));
57	>	}});
58	>
59	>	awaitTermination(t1);
60	>	awaitTermination(t2);
61		}
62
63		/**
64	<	*
65	<	*/
66	<	public void testExchange_InterruptedException(){
67	<	final Exchanger e = new Exchanger();
68	<	Thread t = new Thread(new Runnable() {
69	<	public void run(){
70	<	try {
71	<	e.exchange(one);
72	<	threadShouldThrow();
73	<	} catch(InterruptedException success){
74	<	}
75	<	}
76	<	});
77	<	try {
118	<	t.start();
119	<	Thread.sleep(SHORT_DELAY_MS);
120	<	t.interrupt();
121	<	t.join();
122	<	} catch(InterruptedException ex) {
123	<	unexpectedException();
124	<	}
64	>	* interrupt during wait for exchange throws IE
65	>	*/
66	>	public void testExchange_InterruptedException() {
67	>	final Exchanger e = new Exchanger();
68	>	final CountDownLatch threadStarted = new CountDownLatch(1);
69	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
70	>	public void realRun() throws InterruptedException {
71	>	threadStarted.countDown();
72	>	e.exchange(one);
73	>	}});
74	>
75	>	await(threadStarted);
76	>	t.interrupt();
77	>	awaitTermination(t);
78		}
79
80		/**
81	<	*
82	<	*/
83	<	public void testTimedExchange_InterruptedException(){
84	<	final Exchanger e = new Exchanger();
85	<	Thread t = new Thread(new Runnable() {
86	<	public void run(){
87	<	try {
88	<	e.exchange(null, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
89	<	threadShouldThrow();
90	<	} catch(InterruptedException success){
91	<	} catch(Exception e2){
92	<	threadFail("should throw IE");
93	<	}
94	<	}
142	<	});
143	<	try {
144	<	t.start();
145	<	t.interrupt();
146	<	t.join();
147	<	} catch(InterruptedException ex){
148	<	unexpectedException();
149	<	}
81	>	* interrupt during wait for timed exchange throws IE
82	>	*/
83	>	public void testTimedExchange_InterruptedException() {
84	>	final Exchanger e = new Exchanger();
85	>	final CountDownLatch threadStarted = new CountDownLatch(1);
86	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
87	>	public void realRun() throws Exception {
88	>	threadStarted.countDown();
89	>	e.exchange(null, LONG_DELAY_MS, MILLISECONDS);
90	>	}});
91	>
92	>	await(threadStarted);
93	>	t.interrupt();
94	>	awaitTermination(t);
95		}
96
97		/**
98	<	*
99	<	*/
100	<	public void testExchange_TimeOutException(){
101	<	final Exchanger e = new Exchanger();
102	<	Thread t = new Thread(new Runnable() {
103	<	public void run(){
104	<	try {
105	<	e.exchange(null, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
106	<	threadShouldThrow();
107	<	} catch(TimeoutException success){
108	<	} catch(InterruptedException e2){
109	<	threadFail("should throw TOE");
110	<	}
98	>	* timeout during wait for timed exchange throws TimeoutException
99	>	*/
100	>	public void testExchange_TimeoutException() {
101	>	final Exchanger e = new Exchanger();
102	>	Thread t = newStartedThread(new CheckedRunnable() {
103	>	public void realRun() throws Exception {
104	>	long timeoutMillis = SHORT_DELAY_MS;
105	>	long startTime = System.nanoTime();
106	>	try {
107	>	e.exchange(null, timeoutMillis, MILLISECONDS);
108	>	shouldThrow();
109	>	} catch (TimeoutException success) {
110	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
111		}
112	<	});
113	<	try {
114	<	t.start();
170	<	t.join();
171	<	} catch(InterruptedException ex){
172	<	unexpectedException();
173	<	}
112	>	}});
113	>
114	>	awaitTermination(t);
115		}
116	+
117	+	/**
118	+	* If one exchanging thread is interrupted, another succeeds.
119	+	*/
120	+	public void testReplacementAfterExchange() throws InterruptedException {
121	+	final Exchanger e = new Exchanger();
122	+	final CountDownLatch exchanged = new CountDownLatch(2);
123	+	final CountDownLatch interrupted = new CountDownLatch(1);
124	+	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
125	+	public void realRun() throws InterruptedException {
126	+	assertSame(two, e.exchange(one));
127	+	exchanged.countDown();
128	+	e.exchange(two);
129	+	}});
130	+	Thread t2 = newStartedThread(new CheckedRunnable() {
131	+	public void realRun() throws InterruptedException {
132	+	assertSame(one, e.exchange(two));
133	+	exchanged.countDown();
134	+	interrupted.await();
135	+	assertSame(three, e.exchange(one));
136	+	}});
137	+	Thread t3 = newStartedThread(new CheckedRunnable() {
138	+	public void realRun() throws InterruptedException {
139	+	interrupted.await();
140	+	assertSame(one, e.exchange(three));
141	+	}});
142	+
143	+	await(exchanged);
144	+	t1.interrupt();
145	+	interrupted.countDown();
146	+	awaitTermination(t1);
147	+	awaitTermination(t2);
148	+	awaitTermination(t3);
149	+	}
150	+
151		}

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