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

Comparing jsr166/src/test/tck/ExchangerTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:54 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
12	–	public class ExchangerTest extends TestCase{
13	–
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	<	private static long SHORT_DELAY_MS = 100;
24	<	private static long MEDIUM_DELAY_MS = 1000;
25	<	private static long LONG_DELAY_MS = 10000;
26	<
27	<	private final static Integer one = new Integer(1);
28	<	private final static Integer two = new Integer(2);
29	<
30	<	public void testExchange(){
31	<	final Exchanger e = new Exchanger();
32	<	Thread t1 = new Thread(new Runnable(){
33	<	public void run(){
34	<	try{
35	<	Object v = e.exchange(one);
36	<	assertEquals(v, two);
37	<	Object w = e.exchange(v);
38	<	assertEquals(w, one);
39	<	}catch(InterruptedException e){
40	<	fail("unexpected exception");
41	<	}
42	<	}
43	<	});
44	<	Thread t2 = new Thread(new Runnable(){
45	<	public void run(){
46	<	try{
47	<	Object v = e.exchange(two);
48	<	assertEquals(v, one);
49	<	Object w = e.exchange(v);
50	<	assertEquals(w, two);
51	<	}catch(InterruptedException e){
52	<	fail("unexpected exception");
53	<	}
54	<	}
55	<	});
56	<	try {
57	<	t1.start();
58	<	t2.start();
59	<	t1.join();
60	<	t2.join();
61	<	} catch(InterruptedException ex) {
62	<	fail("unexpected exception");
63	<	}
64	<	}
65	<
66	<	public void testExchange1_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	<	fail("should throw");
73	<	}catch(InterruptedException success){
74	<	}
75	<	}
76	<	});
77	<	try{
78	<	t.start();
79	<	Thread.sleep(SHORT_DELAY_MS);
80	<	t.interrupt();
81	<	t.join();
82	<	} catch(InterruptedException ex) {
83	<	fail("unexpected exception");
84	<	}
85	<	}
86	<
87	<	public void testExchange2_InterruptedException(){
88	<	final Exchanger e = new Exchanger();
89	<	Thread t = new Thread(new Runnable() {
90	<	public void run(){
91	<	try{
92	<	e.exchange(null, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
93	<	fail("should throw");
94	<	} catch(InterruptedException success){
95	<	} catch(Exception e2){
96	<	fail("should throw IE");
97	<	}
98	<	}
99	<	});
100	<	try{
101	<	t.start();
102	<	t.interrupt();
103	<	t.join();
104	<	} catch(InterruptedException ex){
105	<	fail("unexpected exception");
106	<	}
107	<	}
108	<
109	<	public void testExchange3_TimeOutException(){
110	<	final Exchanger e = new Exchanger();
109	<	Thread t = new Thread(new Runnable() {
110	<	public void run(){
111	<	try{
112	<	e.exchange(null, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
113	<	fail("should throw");
114	<	}catch(TimeoutException success){}
115	<	catch(InterruptedException e2){
116	<	fail("should throw TOE");
117	<	}
23	>	/**
24	>	* exchange exchanges objects across two threads
25	>	*/
26	>	public void testExchange() {
27	>	final Exchanger e = new Exchanger();
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	>	* timed exchange exchanges objects across two threads
45	>	*/
46	>	public void testTimedExchange() {
47	>	final Exchanger e = new Exchanger();
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	>	* 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	>	* 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	>	* 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();
115	<	t.join();
116	<	} catch(InterruptedException ex){
117	<	fail("unexpected exception");
118	<	}
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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