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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 1.13 by jsr166, Tue Dec 1 07:23:09 2009 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/licenses/publicdomain
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	>	/**
24	>	* exchange exchanges objects across two threads
25	>	*/
26	>	public void testExchange() throws InterruptedException {
27	>	final Exchanger e = new Exchanger();
28	>	Thread t1 = new Thread(new CheckedRunnable() {
29	>	public void realRun() throws InterruptedException {
30	>	assertSame(one, e.exchange(two));
31	>	assertSame(two, e.exchange(one));
32	>	}});
33	>	Thread t2 = new Thread(new CheckedRunnable() {
34	>	public void realRun() throws InterruptedException {
35	>	assertSame(two, e.exchange(one));
36	>	assertSame(one, e.exchange(two));
37	>	}});
38	>
39	>	t1.start();
40	>	t2.start();
41	>	t1.join();
42	>	t2.join();
43	>	}
44	>
45	>	/**
46	>	* timed exchange exchanges objects across two threads
47	>	*/
48	>	public void testTimedExchange() throws InterruptedException {
49	>	final Exchanger e = new Exchanger();
50	>	Thread t1 = new Thread(new CheckedRunnable() {
51	>	public void realRun() throws Exception {
52	>	assertSame(one, e.exchange(two, SHORT_DELAY_MS, MILLISECONDS));
53	>	assertSame(two, e.exchange(one, SHORT_DELAY_MS, MILLISECONDS));
54	>	}});
55	>	Thread t2 = new Thread(new CheckedRunnable() {
56	>	public void realRun() throws Exception {
57	>	assertSame(two, e.exchange(one, SHORT_DELAY_MS, MILLISECONDS));
58	>	assertSame(one, e.exchange(two, SHORT_DELAY_MS, MILLISECONDS));
59	>	}});
60	>
61	>	t1.start();
62	>	t2.start();
63	>	t1.join();
64	>	t2.join();
65	>	}
66	>
67	>	/**
68	>	* interrupt during wait for exchange throws IE
69	>	*/
70	>	public void testExchange_InterruptedException() throws InterruptedException {
71	>	final Exchanger e = new Exchanger();
72	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
73	>	public void realRun() throws InterruptedException {
74	>	e.exchange(one);
75	>	}});
76	>
77	>	t.start();
78	>	Thread.sleep(SHORT_DELAY_MS);
79	>	t.interrupt();
80	>	t.join();
81	>	}
82	>
83	>	/**
84	>	* interrupt during wait for timed exchange throws IE
85	>	*/
86	>	public void testTimedExchange_InterruptedException() throws InterruptedException {
87	>	final Exchanger e = new Exchanger();
88	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
89	>	public void realRun() throws Exception {
90	>	e.exchange(null, SMALL_DELAY_MS, MILLISECONDS);
91	>	}});
92	>
93	>	t.start();
94	>	Thread.sleep(SHORT_DELAY_MS);
95	>	t.interrupt();
96	>	t.join();
97		}
98
99	<	private static long SHORT_DELAY_MS = 100;
100	<	private static long MEDIUM_DELAY_MS = 1000;
101	<	private static long LONG_DELAY_MS = 10000;
102	<
103	<	private final static Integer one = new Integer(1);
104	<	private final static Integer two = new Integer(2);
105	<
106	<	public void testExchange(){
107	<	final Exchanger e = new Exchanger();
108	<	Thread t1 = new Thread(new Runnable(){
109	<	public void run(){
110	<	try{
33	<	Object v = e.exchange(one);
34	<	assertEquals(v, two);
35	<	Object w = e.exchange(v);
36	<	assertEquals(w, one);
37	<	}catch(InterruptedException e){
38	<	fail("unexpected exception");
39	<	}
40	<	}
41	<	});
42	<	Thread t2 = new Thread(new Runnable(){
43	<	public void run(){
44	<	try{
45	<	Object v = e.exchange(two);
46	<	assertEquals(v, one);
47	<	Object w = e.exchange(v);
48	<	assertEquals(w, two);
49	<	}catch(InterruptedException e){
50	<	fail("unexpected exception");
51	<	}
52	<	}
53	<	});
54	<	try {
55	<	t1.start();
56	<	t2.start();
57	<	t1.join();
58	<	t2.join();
59	<	} catch(InterruptedException ex) {
60	<	fail("unexpected exception");
61	<	}
62	<	}
63	<
64	<	public void testExchange1_InterruptedException(){
65	<	final Exchanger e = new Exchanger();
66	<	Thread t = new Thread(new Runnable() {
67	<	public void run(){
68	<	try{
69	<	e.exchange(one);
70	<	fail("should throw");
71	<	}catch(InterruptedException success){
72	<	}
73	<	}
74	<	});
75	<	try{
76	<	t.start();
77	<	Thread.sleep(SHORT_DELAY_MS);
78	<	t.interrupt();
79	<	t.join();
80	<	} catch(InterruptedException ex) {
81	<	fail("unexpected exception");
82	<	}
83	<	}
84	<
85	<	public void testExchange2_InterruptedException(){
86	<	final Exchanger e = new Exchanger();
87	<	Thread t = new Thread(new Runnable() {
88	<	public void run(){
89	<	try{
90	<	e.exchange(null, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
91	<	fail("should throw");
92	<	} catch(InterruptedException success){
93	<	} catch(Exception e2){
94	<	fail("should throw IE");
95	<	}
96	<	}
97	<	});
98	<	try{
99	<	t.start();
100	<	t.interrupt();
101	<	t.join();
102	<	} catch(InterruptedException ex){
103	<	fail("unexpected exception");
104	<	}
105	<	}
106	<
107	<	public void testExchange3_TimeOutException(){
108	<	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	<	}
118	<	}
119	<	});
120	<	try{
121	<	t.start();
122	<	t.join();
123	<	} catch(InterruptedException ex){
124	<	fail("unexpected exception");
125	<	}
99	>	/**
100	>	* timeout during wait for timed exchange throws TOE
101	>	*/
102	>	public void testExchange_TimeOutException() throws InterruptedException {
103	>	final Exchanger e = new Exchanger();
104	>	Thread t = new ThreadShouldThrow(TimeoutException.class) {
105	>	public void realRun() throws Exception {
106	>	e.exchange(null, SHORT_DELAY_MS, MILLISECONDS);
107	>	}};
108	>
109	>	t.start();
110	>	t.join();
111		}
112	+
113	+	/**
114	+	* If one exchanging thread is interrupted, another succeeds.
115	+	*/
116	+	public void testReplacementAfterExchange() throws InterruptedException {
117	+	final Exchanger e = new Exchanger();
118	+	Thread t1 = new Thread(new CheckedInterruptedRunnable() {
119	+	public void realRun() throws InterruptedException {
120	+	assertSame(two, e.exchange(one));
121	+	e.exchange(two);
122	+	}});
123	+	Thread t2 = new Thread(new CheckedRunnable() {
124	+	public void realRun() throws InterruptedException {
125	+	assertSame(one, e.exchange(two));
126	+	Thread.sleep(SMALL_DELAY_MS);
127	+	assertSame(three, e.exchange(one));
128	+	}});
129	+	Thread t3 = new Thread(new CheckedRunnable() {
130	+	public void realRun() throws InterruptedException {
131	+	Thread.sleep(SMALL_DELAY_MS);
132	+	assertSame(one, e.exchange(three));
133	+	}});
134	+
135	+	t1.start();
136	+	t2.start();
137	+	t3.start();
138	+	Thread.sleep(SHORT_DELAY_MS);
139	+	t1.interrupt();
140	+	t1.join();
141	+	t2.join();
142	+	t3.join();
143	+	}
144	+
145		}

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