1 |
dl |
1.1 |
/* |
2 |
dl |
1.10 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
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* Expert Group and released to the public domain, as explained at |
4 |
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* http://creativecommons.org/licenses/publicdomain |
5 |
jsr166 |
1.12 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
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* Pat Fisher, Mike Judd. |
7 |
dl |
1.1 |
*/ |
8 |
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9 |
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import junit.framework.*; |
10 |
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import java.util.concurrent.*; |
11 |
jsr166 |
1.15 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
12 |
dl |
1.4 |
import java.util.*; |
13 |
dl |
1.1 |
|
14 |
dl |
1.4 |
public class FutureTaskTest extends JSR166TestCase { |
15 |
dl |
1.1 |
|
16 |
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public static void main(String[] args) { |
17 |
jsr166 |
1.16 |
junit.textui.TestRunner.run (suite()); |
18 |
dl |
1.1 |
} |
19 |
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public static Test suite() { |
20 |
jsr166 |
1.16 |
return new TestSuite(FutureTaskTest.class); |
21 |
dl |
1.1 |
} |
22 |
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23 |
dl |
1.4 |
/** |
24 |
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* Subclass to expose protected methods |
25 |
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*/ |
26 |
dl |
1.7 |
static class PublicFutureTask extends FutureTask { |
27 |
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public PublicFutureTask(Callable r) { super(r); } |
28 |
dl |
1.9 |
public boolean runAndReset() { return super.runAndReset(); } |
29 |
dl |
1.4 |
public void set(Object x) { super.set(x); } |
30 |
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public void setException(Throwable t) { super.setException(t); } |
31 |
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} |
32 |
dl |
1.1 |
|
33 |
dl |
1.5 |
/** |
34 |
dl |
1.6 |
* Creating a future with a null callable throws NPE |
35 |
dl |
1.5 |
*/ |
36 |
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public void testConstructor() { |
37 |
dl |
1.3 |
try { |
38 |
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FutureTask task = new FutureTask(null); |
39 |
jsr166 |
1.15 |
shouldThrow("NullPointerException"); |
40 |
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} catch (NullPointerException success) {} |
41 |
dl |
1.3 |
} |
42 |
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|
43 |
dl |
1.5 |
/** |
44 |
dl |
1.6 |
* creating a future with null runnable fails |
45 |
dl |
1.5 |
*/ |
46 |
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public void testConstructor2() { |
47 |
dl |
1.3 |
try { |
48 |
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FutureTask task = new FutureTask(null, Boolean.TRUE); |
49 |
jsr166 |
1.15 |
shouldThrow("NullPointerException"); |
50 |
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} catch (NullPointerException success) {} |
51 |
dl |
1.3 |
} |
52 |
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|
53 |
dl |
1.5 |
/** |
54 |
dl |
1.6 |
* isDone is true when a task completes |
55 |
dl |
1.5 |
*/ |
56 |
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public void testIsDone() { |
57 |
jsr166 |
1.15 |
FutureTask task = new FutureTask(new NoOpCallable()); |
58 |
jsr166 |
1.16 |
task.run(); |
59 |
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assertTrue(task.isDone()); |
60 |
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assertFalse(task.isCancelled()); |
61 |
dl |
1.4 |
} |
62 |
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|
63 |
dl |
1.5 |
/** |
64 |
dl |
1.9 |
* runAndReset of a non-cancelled task succeeds |
65 |
dl |
1.5 |
*/ |
66 |
dl |
1.9 |
public void testRunAndReset() { |
67 |
dl |
1.7 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
68 |
jsr166 |
1.16 |
assertTrue(task.runAndReset()); |
69 |
dl |
1.6 |
assertFalse(task.isDone()); |
70 |
dl |
1.4 |
} |
71 |
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|
72 |
dl |
1.5 |
/** |
73 |
dl |
1.9 |
* runAndReset after cancellation fails |
74 |
dl |
1.5 |
*/ |
75 |
dl |
1.4 |
public void testResetAfterCancel() { |
76 |
dl |
1.7 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
77 |
dl |
1.4 |
assertTrue(task.cancel(false)); |
78 |
jsr166 |
1.16 |
assertFalse(task.runAndReset()); |
79 |
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assertTrue(task.isDone()); |
80 |
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assertTrue(task.isCancelled()); |
81 |
dl |
1.4 |
} |
82 |
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|
83 |
dl |
1.1 |
|
84 |
dl |
1.4 |
|
85 |
dl |
1.5 |
/** |
86 |
dl |
1.11 |
* setting value causes get to return it |
87 |
dl |
1.5 |
*/ |
88 |
jsr166 |
1.15 |
public void testSet() throws Exception { |
89 |
dl |
1.7 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
90 |
dl |
1.4 |
task.set(one); |
91 |
jsr166 |
1.15 |
assertEquals(task.get(), one); |
92 |
dl |
1.4 |
} |
93 |
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|
94 |
dl |
1.5 |
/** |
95 |
dl |
1.6 |
* setException causes get to throw ExecutionException |
96 |
dl |
1.5 |
*/ |
97 |
jsr166 |
1.15 |
public void testSetException() throws Exception { |
98 |
dl |
1.4 |
Exception nse = new NoSuchElementException(); |
99 |
dl |
1.7 |
PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
100 |
dl |
1.4 |
task.setException(nse); |
101 |
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try { |
102 |
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Object x = task.get(); |
103 |
jsr166 |
1.15 |
shouldThrow("ExecutionException"); |
104 |
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} catch (ExecutionException success) { |
105 |
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assertSame(success.getCause(), nse); |
106 |
dl |
1.4 |
} |
107 |
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} |
108 |
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|
109 |
dl |
1.5 |
/** |
110 |
dl |
1.6 |
* Cancelling before running succeeds |
111 |
dl |
1.5 |
*/ |
112 |
dl |
1.1 |
public void testCancelBeforeRun() { |
113 |
jsr166 |
1.15 |
FutureTask task = new FutureTask(new NoOpCallable()); |
114 |
dl |
1.1 |
assertTrue(task.cancel(false)); |
115 |
jsr166 |
1.16 |
task.run(); |
116 |
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assertTrue(task.isDone()); |
117 |
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assertTrue(task.isCancelled()); |
118 |
dl |
1.1 |
} |
119 |
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|
120 |
dl |
1.5 |
/** |
121 |
dl |
1.6 |
* Cancel(true) before run succeeds |
122 |
dl |
1.5 |
*/ |
123 |
dl |
1.1 |
public void testCancelBeforeRun2() { |
124 |
jsr166 |
1.15 |
FutureTask task = new FutureTask(new NoOpCallable()); |
125 |
dl |
1.1 |
assertTrue(task.cancel(true)); |
126 |
jsr166 |
1.16 |
task.run(); |
127 |
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assertTrue(task.isDone()); |
128 |
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assertTrue(task.isCancelled()); |
129 |
dl |
1.1 |
} |
130 |
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|
131 |
dl |
1.5 |
/** |
132 |
dl |
1.6 |
* cancel of a completed task fails |
133 |
dl |
1.5 |
*/ |
134 |
dl |
1.1 |
public void testCancelAfterRun() { |
135 |
jsr166 |
1.15 |
FutureTask task = new FutureTask(new NoOpCallable()); |
136 |
jsr166 |
1.16 |
task.run(); |
137 |
dl |
1.1 |
assertFalse(task.cancel(false)); |
138 |
jsr166 |
1.16 |
assertTrue(task.isDone()); |
139 |
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assertFalse(task.isCancelled()); |
140 |
dl |
1.1 |
} |
141 |
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|
142 |
dl |
1.5 |
/** |
143 |
dl |
1.6 |
* cancel(true) interrupts a running task |
144 |
dl |
1.5 |
*/ |
145 |
jsr166 |
1.15 |
public void testCancelInterrupt() throws InterruptedException { |
146 |
jsr166 |
1.16 |
final FutureTask task = |
147 |
jsr166 |
1.15 |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
148 |
jsr166 |
1.16 |
public Object realCall() throws InterruptedException { |
149 |
jsr166 |
1.15 |
Thread.sleep(SMALL_DELAY_MS); |
150 |
jsr166 |
1.16 |
return Boolean.TRUE; |
151 |
jsr166 |
1.15 |
}}); |
152 |
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|
153 |
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Thread t = new Thread(task); |
154 |
dl |
1.1 |
t.start(); |
155 |
jsr166 |
1.15 |
Thread.sleep(SHORT_DELAY_MS); |
156 |
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assertTrue(task.cancel(true)); |
157 |
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t.join(); |
158 |
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assertTrue(task.isDone()); |
159 |
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assertTrue(task.isCancelled()); |
160 |
dl |
1.1 |
} |
161 |
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|
162 |
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|
163 |
dl |
1.5 |
/** |
164 |
dl |
1.6 |
* cancel(false) does not interrupt a running task |
165 |
dl |
1.5 |
*/ |
166 |
jsr166 |
1.15 |
public void testCancelNoInterrupt() throws InterruptedException { |
167 |
jsr166 |
1.16 |
final FutureTask task = |
168 |
jsr166 |
1.15 |
new FutureTask(new CheckedCallable<Object>() { |
169 |
jsr166 |
1.16 |
public Object realCall() throws InterruptedException { |
170 |
jsr166 |
1.15 |
Thread.sleep(MEDIUM_DELAY_MS); |
171 |
dl |
1.1 |
return Boolean.TRUE; |
172 |
jsr166 |
1.15 |
}}); |
173 |
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|
174 |
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Thread t = new Thread(task); |
175 |
dl |
1.1 |
t.start(); |
176 |
jsr166 |
1.15 |
Thread.sleep(SHORT_DELAY_MS); |
177 |
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assertTrue(task.cancel(false)); |
178 |
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t.join(); |
179 |
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assertTrue(task.isDone()); |
180 |
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assertTrue(task.isCancelled()); |
181 |
dl |
1.1 |
} |
182 |
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|
183 |
dl |
1.5 |
/** |
184 |
dl |
1.6 |
* set in one thread causes get in another thread to retrieve value |
185 |
dl |
1.5 |
*/ |
186 |
jsr166 |
1.15 |
public void testGet1() throws InterruptedException { |
187 |
jsr166 |
1.16 |
final FutureTask ft = |
188 |
jsr166 |
1.15 |
new FutureTask(new CheckedCallable<Object>() { |
189 |
jsr166 |
1.16 |
public Object realCall() throws InterruptedException { |
190 |
dl |
1.1 |
return Boolean.TRUE; |
191 |
jsr166 |
1.15 |
}}); |
192 |
jsr166 |
1.16 |
Thread t = new Thread(new CheckedRunnable() { |
193 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
194 |
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assertSame(Boolean.TRUE, ft.get()); |
195 |
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}}); |
196 |
dl |
1.1 |
|
197 |
jsr166 |
1.15 |
assertFalse(ft.isDone()); |
198 |
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assertFalse(ft.isCancelled()); |
199 |
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t.start(); |
200 |
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Thread.sleep(SHORT_DELAY_MS); |
201 |
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ft.run(); |
202 |
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t.join(); |
203 |
|
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assertTrue(ft.isDone()); |
204 |
|
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assertFalse(ft.isCancelled()); |
205 |
dl |
1.1 |
} |
206 |
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|
207 |
dl |
1.5 |
/** |
208 |
dl |
1.6 |
* set in one thread causes timed get in another thread to retrieve value |
209 |
dl |
1.5 |
*/ |
210 |
jsr166 |
1.15 |
public void testTimedGet1() throws InterruptedException { |
211 |
jsr166 |
1.16 |
final FutureTask ft = |
212 |
jsr166 |
1.15 |
new FutureTask(new CheckedCallable<Object>() { |
213 |
jsr166 |
1.16 |
public Object realCall() throws InterruptedException { |
214 |
dl |
1.1 |
return Boolean.TRUE; |
215 |
jsr166 |
1.15 |
}}); |
216 |
jsr166 |
1.16 |
Thread t = new Thread(new CheckedRunnable() { |
217 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
218 |
|
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assertSame(Boolean.TRUE, ft.get(SMALL_DELAY_MS, MILLISECONDS)); |
219 |
|
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}}); |
220 |
jsr166 |
1.12 |
|
221 |
jsr166 |
1.15 |
assertFalse(ft.isDone()); |
222 |
|
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assertFalse(ft.isCancelled()); |
223 |
|
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t.start(); |
224 |
|
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Thread.sleep(SHORT_DELAY_MS); |
225 |
|
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ft.run(); |
226 |
|
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t.join(); |
227 |
|
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assertTrue(ft.isDone()); |
228 |
|
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assertFalse(ft.isCancelled()); |
229 |
dl |
1.1 |
} |
230 |
|
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|
231 |
dl |
1.5 |
/** |
232 |
dl |
1.6 |
* Cancelling a task causes timed get in another thread to throw CancellationException |
233 |
dl |
1.5 |
*/ |
234 |
jsr166 |
1.15 |
public void testTimedGet_Cancellation() throws InterruptedException { |
235 |
jsr166 |
1.16 |
final FutureTask ft = |
236 |
jsr166 |
1.15 |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
237 |
jsr166 |
1.16 |
public Object realCall() throws InterruptedException { |
238 |
jsr166 |
1.15 |
Thread.sleep(SMALL_DELAY_MS); |
239 |
jsr166 |
1.16 |
return Boolean.TRUE; |
240 |
jsr166 |
1.15 |
}}); |
241 |
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|
242 |
|
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Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
243 |
|
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public void realRun() throws Exception { |
244 |
|
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ft.get(MEDIUM_DELAY_MS, MILLISECONDS); |
245 |
|
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}}; |
246 |
|
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Thread t2 = new Thread(ft); |
247 |
|
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t1.start(); |
248 |
|
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t2.start(); |
249 |
|
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Thread.sleep(SHORT_DELAY_MS); |
250 |
|
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ft.cancel(true); |
251 |
|
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t1.join(); |
252 |
|
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t2.join(); |
253 |
dl |
1.1 |
} |
254 |
dl |
1.6 |
|
255 |
dl |
1.5 |
/** |
256 |
dl |
1.6 |
* Cancelling a task causes get in another thread to throw CancellationException |
257 |
dl |
1.5 |
*/ |
258 |
jsr166 |
1.15 |
public void testGet_Cancellation() throws InterruptedException { |
259 |
jsr166 |
1.16 |
final FutureTask ft = |
260 |
jsr166 |
1.15 |
new FutureTask(new CheckedInterruptedCallable<Object>() { |
261 |
jsr166 |
1.16 |
public Object realCall() throws InterruptedException { |
262 |
jsr166 |
1.15 |
Thread.sleep(SMALL_DELAY_MS); |
263 |
jsr166 |
1.16 |
return Boolean.TRUE; |
264 |
jsr166 |
1.15 |
}}); |
265 |
|
|
Thread t1 = new ThreadShouldThrow(CancellationException.class) { |
266 |
|
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public void realRun() throws Exception { |
267 |
|
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ft.get(); |
268 |
|
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}}; |
269 |
|
|
|
270 |
|
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Thread t2 = new Thread(ft); |
271 |
|
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t1.start(); |
272 |
|
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t2.start(); |
273 |
|
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Thread.sleep(SHORT_DELAY_MS); |
274 |
|
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ft.cancel(true); |
275 |
|
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t1.join(); |
276 |
|
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t2.join(); |
277 |
dl |
1.1 |
} |
278 |
jsr166 |
1.12 |
|
279 |
dl |
1.1 |
|
280 |
dl |
1.5 |
/** |
281 |
dl |
1.6 |
* A runtime exception in task causes get to throw ExecutionException |
282 |
dl |
1.5 |
*/ |
283 |
jsr166 |
1.15 |
public void testGet_ExecutionException() throws InterruptedException { |
284 |
jsr166 |
1.16 |
final FutureTask ft = new FutureTask(new Callable() { |
285 |
|
|
public Object call() { |
286 |
jsr166 |
1.15 |
return 5/0; |
287 |
|
|
}}); |
288 |
|
|
|
289 |
|
|
ft.run(); |
290 |
|
|
try { |
291 |
jsr166 |
1.16 |
ft.get(); |
292 |
|
|
shouldThrow("ExecutionException"); |
293 |
|
|
} catch (ExecutionException success) { |
294 |
jsr166 |
1.15 |
assertTrue(success.getCause() instanceof ArithmeticException); |
295 |
dl |
1.1 |
} |
296 |
|
|
} |
297 |
jsr166 |
1.12 |
|
298 |
dl |
1.5 |
/** |
299 |
dl |
1.6 |
* A runtime exception in task causes timed get to throw ExecutionException |
300 |
dl |
1.5 |
*/ |
301 |
jsr166 |
1.15 |
public void testTimedGet_ExecutionException2() throws Exception { |
302 |
jsr166 |
1.16 |
final FutureTask ft = new FutureTask(new Callable() { |
303 |
|
|
public Object call() { |
304 |
jsr166 |
1.15 |
return 5/0; |
305 |
|
|
}}); |
306 |
|
|
|
307 |
|
|
ft.run(); |
308 |
jsr166 |
1.16 |
try { |
309 |
|
|
ft.get(SHORT_DELAY_MS, MILLISECONDS); |
310 |
|
|
shouldThrow("ExecutionException"); |
311 |
|
|
} catch (ExecutionException success) { |
312 |
jsr166 |
1.15 |
assertTrue(success.getCause() instanceof ArithmeticException); |
313 |
|
|
} |
314 |
dl |
1.1 |
} |
315 |
jsr166 |
1.12 |
|
316 |
dl |
1.1 |
|
317 |
dl |
1.5 |
/** |
318 |
dl |
1.6 |
* Interrupting a waiting get causes it to throw InterruptedException |
319 |
dl |
1.5 |
*/ |
320 |
jsr166 |
1.15 |
public void testGet_InterruptedException() throws InterruptedException { |
321 |
jsr166 |
1.16 |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
322 |
|
|
Thread t = new Thread(new CheckedInterruptedRunnable() { |
323 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
324 |
|
|
ft.get(); |
325 |
|
|
}}); |
326 |
|
|
|
327 |
|
|
t.start(); |
328 |
|
|
Thread.sleep(SHORT_DELAY_MS); |
329 |
|
|
t.interrupt(); |
330 |
|
|
t.join(); |
331 |
dl |
1.1 |
} |
332 |
|
|
|
333 |
dl |
1.5 |
/** |
334 |
dl |
1.6 |
* Interrupting a waiting timed get causes it to throw InterruptedException |
335 |
dl |
1.5 |
*/ |
336 |
jsr166 |
1.15 |
public void testTimedGet_InterruptedException2() throws InterruptedException { |
337 |
jsr166 |
1.16 |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
338 |
|
|
Thread t = new Thread(new CheckedInterruptedRunnable() { |
339 |
jsr166 |
1.15 |
public void realRun() throws Exception { |
340 |
|
|
ft.get(LONG_DELAY_MS,MILLISECONDS); |
341 |
|
|
}}); |
342 |
|
|
|
343 |
|
|
t.start(); |
344 |
|
|
Thread.sleep(SHORT_DELAY_MS); |
345 |
|
|
t.interrupt(); |
346 |
|
|
t.join(); |
347 |
dl |
1.1 |
} |
348 |
jsr166 |
1.12 |
|
349 |
dl |
1.5 |
/** |
350 |
dl |
1.6 |
* A timed out timed get throws TimeoutException |
351 |
dl |
1.5 |
*/ |
352 |
jsr166 |
1.15 |
public void testGet_TimeoutException() throws Exception { |
353 |
jsr166 |
1.16 |
try { |
354 |
dl |
1.4 |
FutureTask ft = new FutureTask(new NoOpCallable()); |
355 |
jsr166 |
1.16 |
ft.get(1,MILLISECONDS); |
356 |
|
|
shouldThrow("TimeoutException"); |
357 |
|
|
} catch (TimeoutException success) {} |
358 |
dl |
1.1 |
} |
359 |
jsr166 |
1.12 |
|
360 |
dl |
1.1 |
} |