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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 1.24 by jsr166, Sat Mar 25 21:41:10 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.*;
10	<	import java.util.*;
11	<	import java.util.concurrent.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>
11	>	import java.util.concurrent.CountDownLatch;
12	>	import java.util.concurrent.Exchanger;
13	>	import java.util.concurrent.TimeoutException;
14	>
15	>	import junit.framework.Test;
16	>	import junit.framework.TestSuite;
17
18		public class ExchangerTest extends JSR166TestCase {
19	<
19	>
20		public static void main(String[] args) {
21	<	junit.textui.TestRunner.run (suite());
21	>	main(suite(), args);
22		}
23		public static Test suite() {
24	<	return new TestSuite(ExchangerTest.class);
24	>	return new TestSuite(ExchangerTest.class);
25		}
26
27		/**
28	<	*
28	>	* exchange exchanges objects across two threads
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	<	threadAssertEquals(v, two);
37	<	Object w = e.exchange(v);
38	<	threadAssertEquals(w, one);
39	<	} catch(InterruptedException e){
40	<	threadUnexpectedException();
41	<	}
42	<	}
43	<	});
44	<	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	<	}
32	>	Thread t1 = newStartedThread(new CheckedRunnable() {
33	>	public void realRun() throws InterruptedException {
34	>	assertSame(one, e.exchange(two));
35	>	assertSame(two, e.exchange(one));
36	>	}});
37	>	Thread t2 = newStartedThread(new CheckedRunnable() {
38	>	public void realRun() throws InterruptedException {
39	>	assertSame(two, e.exchange(one));
40	>	assertSame(one, e.exchange(two));
41	>	}});
42	>
43	>	awaitTermination(t1);
44	>	awaitTermination(t2);
45		}
46
47		/**
48	<	*
48	>	* timed exchange exchanges objects across two threads
49		*/
50		public void testTimedExchange() {
51		final Exchanger e = new Exchanger();
52	<	Thread t1 = new Thread(new Runnable(){
53	<	public void run(){
54	<	try {
55	<	Object v = e.exchange(one, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
56	<	threadAssertEquals(v, two);
57	<	Object w = e.exchange(v, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
58	<	threadAssertEquals(w, one);
59	<	} catch(InterruptedException e){
60	<	threadUnexpectedException();
61	<	} catch(TimeoutException toe) {
62	<	threadUnexpectedException();
63	<	}
64	<	}
65	<	});
66	<	Thread t2 = new Thread(new Runnable(){
67	<	public void run(){
68	<	try {
69	<	Object v = e.exchange(two, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
70	<	threadAssertEquals(v, one);
71	<	Object w = e.exchange(v, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
72	<	threadAssertEquals(w, two);
73	<	} catch(InterruptedException e){
74	<	threadUnexpectedException();
75	<	} catch(TimeoutException toe) {
76	<	threadUnexpectedException();
77	<	}
78	<	}
79	<	});
80	<	try {
81	<	t1.start();
95	<	t2.start();
96	<	t1.join();
97	<	t2.join();
98	<	} catch(InterruptedException ex) {
99	<	unexpectedException();
100	<	}
101	<	}
102	<
103	<	/**
104	<	*
105	<	*/
106	<	public void testExchange_InterruptedException(){
107	<	final Exchanger e = new Exchanger();
108	<	Thread t = new Thread(new Runnable() {
109	<	public void run(){
110	<	try {
111	<	e.exchange(one);
112	<	threadShouldThrow();
113	<	} catch(InterruptedException success){
114	<	}
115	<	}
116	<	});
117	<	try {
118	<	t.start();
119	<	Thread.sleep(SHORT_DELAY_MS);
120	<	t.interrupt();
121	<	t.join();
122	<	} catch(InterruptedException ex) {
123	<	unexpectedException();
124	<	}
125	<	}
126	<
127	<	/**
128	<	*
129	<	*/
130	<	public void testTimedExchange_InterruptedException(){
131	<	final Exchanger e = new Exchanger();
132	<	Thread t = new Thread(new Runnable() {
133	<	public void run(){
134	<	try {
135	<	e.exchange(null, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
136	<	threadShouldThrow();
137	<	} catch(InterruptedException success){
138	<	} catch(Exception e2){
139	<	threadFail("should throw IE");
140	<	}
141	<	}
142	<	});
143	<	try {
144	<	t.start();
145	<	t.interrupt();
146	<	t.join();
147	<	} catch(InterruptedException ex){
148	<	unexpectedException();
149	<	}
150	<	}
151	<
152	<	/**
153	<	*
154	<	*/
155	<	public void testExchange_TimeOutException(){
156	<	final Exchanger e = new Exchanger();
157	<	Thread t = new Thread(new Runnable() {
158	<	public void run(){
159	<	try {
160	<	e.exchange(null, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
161	<	threadShouldThrow();
162	<	} catch(TimeoutException success){
163	<	} catch(InterruptedException e2){
164	<	threadFail("should throw TOE");
165	<	}
166	<	}
167	<	});
168	<	try {
169	<	t.start();
170	<	t.join();
171	<	} catch(InterruptedException ex){
172	<	unexpectedException();
173	<	}
52	>	Thread t1 = newStartedThread(new CheckedRunnable() {
53	>	public void realRun() throws Exception {
54	>	assertSame(one, e.exchange(two, LONG_DELAY_MS, MILLISECONDS));
55	>	assertSame(two, e.exchange(one, LONG_DELAY_MS, MILLISECONDS));
56	>	}});
57	>	Thread t2 = newStartedThread(new CheckedRunnable() {
58	>	public void realRun() throws Exception {
59	>	assertSame(two, e.exchange(one, LONG_DELAY_MS, MILLISECONDS));
60	>	assertSame(one, e.exchange(two, LONG_DELAY_MS, MILLISECONDS));
61	>	}});
62	>
63	>	awaitTermination(t1);
64	>	awaitTermination(t2);
65	>	}
66	>
67	>	/**
68	>	* interrupt during wait for exchange throws IE
69	>	*/
70	>	public void testExchange_InterruptedException() {
71	>	final Exchanger e = new Exchanger();
72	>	final CountDownLatch threadStarted = new CountDownLatch(1);
73	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
74	>	public void realRun() throws InterruptedException {
75	>	threadStarted.countDown();
76	>	e.exchange(one);
77	>	}});
78	>
79	>	await(threadStarted);
80	>	t.interrupt();
81	>	awaitTermination(t);
82		}
83	+
84	+	/**
85	+	* interrupt during wait for timed exchange throws IE
86	+	*/
87	+	public void testTimedExchange_InterruptedException() {
88	+	final Exchanger e = new Exchanger();
89	+	final CountDownLatch threadStarted = new CountDownLatch(1);
90	+	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
91	+	public void realRun() throws Exception {
92	+	threadStarted.countDown();
93	+	e.exchange(null, LONG_DELAY_MS, MILLISECONDS);
94	+	}});
95	+
96	+	await(threadStarted);
97	+	t.interrupt();
98	+	awaitTermination(t);
99	+	}
100	+
101	+	/**
102	+	* timeout during wait for timed exchange throws TimeoutException
103	+	*/
104	+	public void testExchange_TimeoutException() {
105	+	final Exchanger e = new Exchanger();
106	+	Thread t = newStartedThread(new CheckedRunnable() {
107	+	public void realRun() throws Exception {
108	+	long startTime = System.nanoTime();
109	+	try {
110	+	e.exchange(null, timeoutMillis(), MILLISECONDS);
111	+	shouldThrow();
112	+	} catch (TimeoutException success) {}
113	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
114	+	}});
115	+
116	+	awaitTermination(t);
117	+	}
118	+
119	+	/**
120	+	* If one exchanging thread is interrupted, another succeeds.
121	+	*/
122	+	public void testReplacementAfterExchange() {
123	+	final Exchanger e = new Exchanger();
124	+	final CountDownLatch exchanged = new CountDownLatch(2);
125	+	final CountDownLatch interrupted = new CountDownLatch(1);
126	+	Thread t1 = newStartedThread(new CheckedInterruptedRunnable() {
127	+	public void realRun() throws InterruptedException {
128	+	assertSame(two, e.exchange(one));
129	+	exchanged.countDown();
130	+	e.exchange(two);
131	+	}});
132	+	Thread t2 = newStartedThread(new CheckedRunnable() {
133	+	public void realRun() throws InterruptedException {
134	+	assertSame(one, e.exchange(two));
135	+	exchanged.countDown();
136	+	await(interrupted);
137	+	assertSame(three, e.exchange(one));
138	+	}});
139	+	Thread t3 = newStartedThread(new CheckedRunnable() {
140	+	public void realRun() throws InterruptedException {
141	+	await(interrupted);
142	+	assertSame(one, e.exchange(three));
143	+	}});
144	+
145	+	await(exchanged);
146	+	t1.interrupt();
147	+	awaitTermination(t1);
148	+	interrupted.countDown();
149	+	awaitTermination(t2);
150	+	awaitTermination(t3);
151	+	}
152	+
153		}

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