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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.concurrent.*; |
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import java.util.*; |
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|
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public class FutureTaskTest extends TestCase { |
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public class FutureTaskTest extends JSR166TestCase { |
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|
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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return new TestSuite(FutureTaskTest.class); |
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} |
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|
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private static long SHORT_DELAY_MS = 100; |
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private static long MEDIUM_DELAY_MS = 1000; |
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private static long LONG_DELAY_MS = 10000; |
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/** |
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* Subclass to expose protected methods |
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*/ |
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static class PublicFutureTask extends FutureTask { |
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public PublicFutureTask(Callable r) { super(r); } |
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public boolean runAndReset() { return super.runAndReset(); } |
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public void set(Object x) { super.set(x); } |
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public void setException(Throwable t) { super.setException(t); } |
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} |
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|
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public void testIsDone(){ |
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FutureTask task = new FutureTask( new Callable() { |
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public Object call() { return Boolean.TRUE; } }); |
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/** |
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* Creating a future with a null callable throws NPE |
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*/ |
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public void testConstructor() { |
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try { |
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FutureTask task = new FutureTask(null); |
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shouldThrow(); |
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} |
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catch(NullPointerException success) { |
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} |
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} |
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|
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/** |
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* creating a future with null runnable fails |
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*/ |
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public void testConstructor2() { |
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try { |
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FutureTask task = new FutureTask(null, Boolean.TRUE); |
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shouldThrow(); |
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} |
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catch(NullPointerException success) { |
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} |
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} |
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|
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/** |
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* isDone is true when a task completes |
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*/ |
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public void testIsDone() { |
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FutureTask task = new FutureTask( new NoOpCallable()); |
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task.run(); |
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assertTrue(task.isDone()); |
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assertFalse(task.isCancelled()); |
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} |
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|
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/** |
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* runAndReset of a non-cancelled task succeeds |
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*/ |
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public void testRunAndReset() { |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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assertTrue(task.runAndReset()); |
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assertFalse(task.isDone()); |
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} |
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|
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/** |
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* runAndReset after cancellation fails |
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*/ |
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public void testResetAfterCancel() { |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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assertTrue(task.cancel(false)); |
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assertFalse(task.runAndReset()); |
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assertTrue(task.isDone()); |
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assertTrue(task.isCancelled()); |
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} |
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|
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|
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|
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/** |
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* setting value causes get to return it |
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*/ |
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public void testSet() { |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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task.set(one); |
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try { |
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assertEquals(task.get(), one); |
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} |
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catch(Exception e) { |
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unexpectedException(); |
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} |
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} |
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|
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/** |
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* setException causes get to throw ExecutionException |
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*/ |
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public void testSetException() { |
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Exception nse = new NoSuchElementException(); |
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PublicFutureTask task = new PublicFutureTask(new NoOpCallable()); |
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task.setException(nse); |
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try { |
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Object x = task.get(); |
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shouldThrow(); |
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} |
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catch(ExecutionException ee) { |
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Throwable cause = ee.getCause(); |
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assertEquals(cause, nse); |
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} |
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catch(Exception e) { |
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unexpectedException(); |
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} |
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} |
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|
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/** |
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* Cancelling before running succeeds |
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*/ |
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public void testCancelBeforeRun() { |
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FutureTask task = new FutureTask( new Callable() { |
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public Object call() { return Boolean.TRUE; } }); |
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FutureTask task = new FutureTask( new NoOpCallable()); |
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assertTrue(task.cancel(false)); |
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task.run(); |
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assertTrue(task.isDone()); |
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assertTrue(task.isCancelled()); |
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} |
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|
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/** |
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* Cancel(true) before run succeeds |
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*/ |
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public void testCancelBeforeRun2() { |
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FutureTask task = new FutureTask( new Callable() { |
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public Object call() { return Boolean.TRUE; } }); |
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FutureTask task = new FutureTask( new NoOpCallable()); |
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assertTrue(task.cancel(true)); |
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task.run(); |
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assertTrue(task.isDone()); |
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assertTrue(task.isCancelled()); |
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} |
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|
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/** |
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* cancel of a completed task fails |
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*/ |
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public void testCancelAfterRun() { |
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FutureTask task = new FutureTask( new Callable() { |
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public Object call() { return Boolean.TRUE; } }); |
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FutureTask task = new FutureTask( new NoOpCallable()); |
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task.run(); |
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assertFalse(task.cancel(false)); |
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assertTrue(task.isDone()); |
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assertFalse(task.isCancelled()); |
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} |
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|
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public void testCancelInterrupt(){ |
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/** |
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* cancel(true) interrupts a running task |
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*/ |
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public void testCancelInterrupt() { |
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FutureTask task = new FutureTask( new Callable() { |
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public Object call() { |
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try { |
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Thread.sleep(SHORT_DELAY_MS* 2); |
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fail("should throw"); |
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Thread.sleep(MEDIUM_DELAY_MS); |
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threadShouldThrow(); |
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} |
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catch (InterruptedException success) {} |
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return Boolean.TRUE; |
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Thread t = new Thread(task); |
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t.start(); |
170 |
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|
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try{ |
171 |
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try { |
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Thread.sleep(SHORT_DELAY_MS); |
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assertTrue(task.cancel(true)); |
174 |
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t.join(); |
175 |
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assertTrue(task.isDone()); |
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assertTrue(task.isCancelled()); |
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} catch(InterruptedException e){ |
178 |
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fail("unexpected exception"); |
178 |
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unexpectedException(); |
179 |
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} |
180 |
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} |
181 |
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|
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|
183 |
< |
public void testCancelNoInterrupt(){ |
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/** |
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* cancel(false) does not interrupt a running task |
185 |
> |
*/ |
186 |
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public void testCancelNoInterrupt() { |
187 |
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FutureTask task = new FutureTask( new Callable() { |
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public Object call() { |
189 |
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try { |
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< |
Thread.sleep(SHORT_DELAY_MS* 2); |
190 |
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Thread.sleep(MEDIUM_DELAY_MS); |
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} |
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catch (InterruptedException success) { |
193 |
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fail("should not interrupt"); |
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> |
threadFail("should not interrupt"); |
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} |
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return Boolean.TRUE; |
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} }); |
197 |
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Thread t = new Thread(task); |
198 |
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t.start(); |
199 |
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|
200 |
< |
try{ |
200 |
> |
try { |
201 |
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Thread.sleep(SHORT_DELAY_MS); |
202 |
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assertTrue(task.cancel(false)); |
203 |
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t.join(); |
204 |
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assertTrue(task.isDone()); |
205 |
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assertTrue(task.isCancelled()); |
206 |
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} catch(InterruptedException e){ |
207 |
< |
fail("unexpected exception"); |
207 |
> |
unexpectedException(); |
208 |
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} |
209 |
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} |
210 |
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|
211 |
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/** |
212 |
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* set in one thread causes get in another thread to retrieve value |
213 |
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*/ |
214 |
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public void testGet1() { |
215 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
216 |
< |
public Object call(){ |
217 |
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try{ |
215 |
> |
final FutureTask ft = new FutureTask(new Callable() { |
216 |
> |
public Object call() { |
217 |
> |
try { |
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Thread.sleep(MEDIUM_DELAY_MS); |
219 |
< |
}catch(InterruptedException e){ |
220 |
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fail("unexpected exception"); |
219 |
> |
} catch(InterruptedException e){ |
220 |
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threadUnexpectedException(); |
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} |
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return Boolean.TRUE; |
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} |
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}); |
225 |
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Thread t = new Thread(new Runnable(){ |
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public void run(){ |
227 |
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try{ |
225 |
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Thread t = new Thread(new Runnable() { |
226 |
> |
public void run() { |
227 |
> |
try { |
228 |
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ft.get(); |
229 |
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}catch(Exception e){ |
230 |
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fail("unexpected exception"); |
229 |
> |
} catch(Exception e){ |
230 |
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threadUnexpectedException(); |
231 |
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} |
232 |
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} |
233 |
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}); |
234 |
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try{ |
234 |
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try { |
235 |
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assertFalse(ft.isDone()); |
236 |
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assertFalse(ft.isCancelled()); |
237 |
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t.start(); |
241 |
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assertTrue(ft.isDone()); |
242 |
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assertFalse(ft.isCancelled()); |
243 |
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} catch(InterruptedException e){ |
244 |
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fail("unexpected exception"); |
244 |
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unexpectedException(); |
245 |
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|
246 |
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} |
247 |
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} |
248 |
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|
249 |
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/** |
250 |
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* set in one thread causes timed get in another thread to retrieve value |
251 |
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*/ |
252 |
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public void testTimedGet1() { |
253 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
254 |
< |
public Object call(){ |
255 |
< |
try{ |
253 |
> |
final FutureTask ft = new FutureTask(new Callable() { |
254 |
> |
public Object call() { |
255 |
> |
try { |
256 |
|
Thread.sleep(MEDIUM_DELAY_MS); |
257 |
< |
}catch(InterruptedException e){ |
258 |
< |
fail("unexpected exception"); |
257 |
> |
} catch(InterruptedException e){ |
258 |
> |
threadUnexpectedException(); |
259 |
|
} |
260 |
|
return Boolean.TRUE; |
261 |
|
} |
262 |
|
}); |
263 |
< |
Thread t = new Thread(new Runnable(){ |
264 |
< |
public void run(){ |
265 |
< |
try{ |
263 |
> |
Thread t = new Thread(new Runnable() { |
264 |
> |
public void run() { |
265 |
> |
try { |
266 |
|
ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
267 |
|
} catch(TimeoutException success) { |
268 |
|
} catch(Exception e){ |
269 |
< |
fail("unexpected exception"); |
269 |
> |
threadUnexpectedException(); |
270 |
|
} |
271 |
|
} |
272 |
|
}); |
273 |
< |
try{ |
273 |
> |
try { |
274 |
|
assertFalse(ft.isDone()); |
275 |
|
assertFalse(ft.isCancelled()); |
276 |
|
t.start(); |
279 |
|
assertTrue(ft.isDone()); |
280 |
|
assertFalse(ft.isCancelled()); |
281 |
|
} catch(InterruptedException e){ |
282 |
< |
fail("unexpected exception"); |
282 |
> |
unexpectedException(); |
283 |
|
|
284 |
|
} |
285 |
|
} |
286 |
|
|
287 |
< |
|
288 |
< |
public void testGet_Cancellation(){ |
289 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
290 |
< |
public Object call(){ |
291 |
< |
try{ |
292 |
< |
Thread.sleep(MEDIUM_DELAY_MS); |
293 |
< |
}catch(InterruptedException e){ |
294 |
< |
fail("unexpected exception"); |
287 |
> |
/** |
288 |
> |
* Cancelling a task causes timed get in another thread to throw CancellationException |
289 |
> |
*/ |
290 |
> |
public void testTimedGet_Cancellation() { |
291 |
> |
final FutureTask ft = new FutureTask(new Callable() { |
292 |
> |
public Object call() { |
293 |
> |
try { |
294 |
> |
Thread.sleep(SMALL_DELAY_MS); |
295 |
> |
threadShouldThrow(); |
296 |
> |
} catch(InterruptedException e) { |
297 |
|
} |
298 |
< |
return Boolean.TRUE; |
298 |
> |
return Boolean.TRUE; |
299 |
|
} |
300 |
|
}); |
301 |
|
try { |
302 |
< |
Thread.sleep(SHORT_DELAY_MS); |
303 |
< |
Thread t = new Thread(new Runnable(){ |
304 |
< |
public void run(){ |
305 |
< |
try{ |
306 |
< |
ft.get(); |
307 |
< |
fail("should throw"); |
198 |
< |
}catch(CancellationException success){ |
199 |
< |
} |
302 |
> |
Thread t1 = new Thread(new Runnable() { |
303 |
> |
public void run() { |
304 |
> |
try { |
305 |
> |
ft.get(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
306 |
> |
threadShouldThrow(); |
307 |
> |
} catch(CancellationException success) {} |
308 |
|
catch(Exception e){ |
309 |
< |
fail("unexpected exception"); |
310 |
< |
} |
309 |
> |
threadUnexpectedException(); |
310 |
> |
} |
311 |
|
} |
312 |
|
}); |
313 |
< |
t.start(); |
313 |
> |
Thread t2 = new Thread(ft); |
314 |
> |
t1.start(); |
315 |
> |
t2.start(); |
316 |
> |
Thread.sleep(SHORT_DELAY_MS); |
317 |
|
ft.cancel(true); |
318 |
< |
t.join(); |
319 |
< |
}catch(InterruptedException sucess){ |
320 |
< |
fail("unexpected exception"); |
318 |
> |
t1.join(); |
319 |
> |
t2.join(); |
320 |
> |
} catch(InterruptedException ie){ |
321 |
> |
unexpectedException(); |
322 |
|
} |
323 |
|
} |
324 |
< |
|
325 |
< |
public void testGet_Cancellation2(){ |
326 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
327 |
< |
public Object call(){ |
328 |
< |
try{ |
329 |
< |
Thread.sleep(SHORT_DELAY_MS); |
330 |
< |
} catch(InterruptedException e) { |
331 |
< |
fail("unexpected exception"); |
324 |
> |
|
325 |
> |
/** |
326 |
> |
* Cancelling a task causes get in another thread to throw CancellationException |
327 |
> |
*/ |
328 |
> |
public void testGet_Cancellation() { |
329 |
> |
final FutureTask ft = new FutureTask(new Callable() { |
330 |
> |
public Object call() { |
331 |
> |
try { |
332 |
> |
Thread.sleep(MEDIUM_DELAY_MS); |
333 |
> |
threadShouldThrow(); |
334 |
> |
} catch(InterruptedException e){ |
335 |
|
} |
336 |
< |
return Boolean.TRUE; |
336 |
> |
return Boolean.TRUE; |
337 |
|
} |
338 |
|
}); |
339 |
< |
try{ |
340 |
< |
Thread.sleep(100); |
341 |
< |
Thread t = new Thread(new Runnable(){ |
342 |
< |
public void run(){ |
343 |
< |
try{ |
344 |
< |
ft.get(3 * SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
345 |
< |
fail("should throw"); |
346 |
< |
}catch(CancellationException success) {} |
339 |
> |
try { |
340 |
> |
Thread t1 = new Thread(new Runnable() { |
341 |
> |
public void run() { |
342 |
> |
try { |
343 |
> |
ft.get(); |
344 |
> |
threadShouldThrow(); |
345 |
> |
} catch(CancellationException success){ |
346 |
> |
} |
347 |
|
catch(Exception e){ |
348 |
< |
fail("unexpected exception"); |
349 |
< |
} |
348 |
> |
threadUnexpectedException(); |
349 |
> |
} |
350 |
|
} |
351 |
|
}); |
352 |
< |
t.start(); |
353 |
< |
Thread.sleep(SHORT_DELAY_MS); |
352 |
> |
Thread t2 = new Thread(ft); |
353 |
> |
t1.start(); |
354 |
> |
t2.start(); |
355 |
> |
Thread.sleep(SHORT_DELAY_MS); |
356 |
|
ft.cancel(true); |
357 |
< |
Thread.sleep(SHORT_DELAY_MS); |
358 |
< |
t.join(); |
359 |
< |
}catch(InterruptedException ie){ |
360 |
< |
fail("unexpected exception"); |
357 |
> |
t1.join(); |
358 |
> |
t2.join(); |
359 |
> |
} catch(InterruptedException success){ |
360 |
> |
unexpectedException(); |
361 |
|
} |
362 |
|
} |
363 |
+ |
|
364 |
|
|
365 |
< |
public void testGet_ExecutionException(){ |
366 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
367 |
< |
public Object call(){ |
365 |
> |
/** |
366 |
> |
* A runtime exception in task causes get to throw ExecutionException |
367 |
> |
*/ |
368 |
> |
public void testGet_ExecutionException() { |
369 |
> |
final FutureTask ft = new FutureTask(new Callable() { |
370 |
> |
public Object call() { |
371 |
|
int i = 5/0; |
372 |
|
return Boolean.TRUE; |
373 |
|
} |
374 |
|
}); |
375 |
< |
try{ |
375 |
> |
try { |
376 |
|
ft.run(); |
377 |
|
ft.get(); |
378 |
< |
fail("should throw"); |
379 |
< |
}catch(ExecutionException success){ |
378 |
> |
shouldThrow(); |
379 |
> |
} catch(ExecutionException success){ |
380 |
|
} |
381 |
|
catch(Exception e){ |
382 |
< |
fail("unexpected exception"); |
382 |
> |
unexpectedException(); |
383 |
|
} |
384 |
|
} |
385 |
|
|
386 |
< |
public void testTimedGet_ExecutionException2(){ |
387 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
388 |
< |
public Object call(){ |
386 |
> |
/** |
387 |
> |
* A runtime exception in task causes timed get to throw ExecutionException |
388 |
> |
*/ |
389 |
> |
public void testTimedGet_ExecutionException2() { |
390 |
> |
final FutureTask ft = new FutureTask(new Callable() { |
391 |
> |
public Object call() { |
392 |
|
int i = 5/0; |
393 |
|
return Boolean.TRUE; |
394 |
|
} |
395 |
|
}); |
396 |
< |
try{ |
396 |
> |
try { |
397 |
|
ft.run(); |
398 |
|
ft.get(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
399 |
< |
fail("should throw"); |
400 |
< |
}catch(ExecutionException success) { |
401 |
< |
}catch(TimeoutException success) { } // unlikely but OK |
399 |
> |
shouldThrow(); |
400 |
> |
} catch(ExecutionException success) { |
401 |
> |
} catch(TimeoutException success) { } // unlikely but OK |
402 |
|
catch(Exception e){ |
403 |
< |
fail("unexpected exception"); |
403 |
> |
unexpectedException(); |
404 |
|
} |
405 |
|
} |
406 |
|
|
407 |
|
|
408 |
< |
public void testGet_InterruptedException(){ |
409 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
410 |
< |
public Object call(){ |
411 |
< |
return new Object(); |
412 |
< |
} |
413 |
< |
}); |
414 |
< |
Thread t = new Thread(new Runnable(){ |
415 |
< |
public void run(){ |
292 |
< |
try{ |
408 |
> |
/** |
409 |
> |
* Interrupting a waiting get causes it to throw InterruptedException |
410 |
> |
*/ |
411 |
> |
public void testGet_InterruptedException() { |
412 |
> |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
413 |
> |
Thread t = new Thread(new Runnable() { |
414 |
> |
public void run() { |
415 |
> |
try { |
416 |
|
ft.get(); |
417 |
< |
fail("should throw"); |
417 |
> |
threadShouldThrow(); |
418 |
|
} catch(InterruptedException success){ |
419 |
|
} catch(Exception e){ |
420 |
< |
fail("unexpected exception"); |
420 |
> |
threadUnexpectedException(); |
421 |
|
} |
422 |
|
} |
423 |
|
}); |
427 |
|
t.interrupt(); |
428 |
|
t.join(); |
429 |
|
} catch(Exception e){ |
430 |
< |
fail("unexpected exception"); |
430 |
> |
unexpectedException(); |
431 |
|
} |
432 |
|
} |
433 |
|
|
434 |
< |
public void testTimedGet_InterruptedException2(){ |
435 |
< |
final FutureTask ft = new FutureTask(new Callable(){ |
436 |
< |
public Object call(){ |
437 |
< |
return new Object(); |
438 |
< |
} |
439 |
< |
}); |
440 |
< |
Thread t = new Thread(new Runnable(){ |
441 |
< |
public void run(){ |
442 |
< |
try{ |
443 |
< |
ft.get(100,TimeUnit.SECONDS); |
444 |
< |
fail("should throw"); |
322 |
< |
}catch(InterruptedException success){} |
434 |
> |
/** |
435 |
> |
* Interrupting a waiting timed get causes it to throw InterruptedException |
436 |
> |
*/ |
437 |
> |
public void testTimedGet_InterruptedException2() { |
438 |
> |
final FutureTask ft = new FutureTask(new NoOpCallable()); |
439 |
> |
Thread t = new Thread(new Runnable() { |
440 |
> |
public void run() { |
441 |
> |
try { |
442 |
> |
ft.get(LONG_DELAY_MS,TimeUnit.MILLISECONDS); |
443 |
> |
threadShouldThrow(); |
444 |
> |
} catch(InterruptedException success){} |
445 |
|
catch(Exception e){ |
446 |
< |
fail("unexpected exception"); |
446 |
> |
threadUnexpectedException(); |
447 |
|
} |
448 |
|
} |
449 |
|
}); |
453 |
|
t.interrupt(); |
454 |
|
t.join(); |
455 |
|
} catch(Exception e){ |
456 |
< |
fail("unexpected exception"); |
456 |
> |
unexpectedException(); |
457 |
|
} |
458 |
|
} |
459 |
|
|
460 |
< |
public void testGet_TimeoutException(){ |
461 |
< |
FutureTask ft = new FutureTask(new Callable(){ |
462 |
< |
public Object call(){ |
463 |
< |
return new Object(); |
464 |
< |
} |
465 |
< |
}); |
344 |
< |
try{ |
460 |
> |
/** |
461 |
> |
* A timed out timed get throws TimeoutException |
462 |
> |
*/ |
463 |
> |
public void testGet_TimeoutException() { |
464 |
> |
try { |
465 |
> |
FutureTask ft = new FutureTask(new NoOpCallable()); |
466 |
|
ft.get(1,TimeUnit.MILLISECONDS); |
467 |
< |
fail("should throw"); |
468 |
< |
}catch(TimeoutException success){} |
469 |
< |
catch(Exception sucess){ |
470 |
< |
fail("unexpected exception"); |
467 |
> |
shouldThrow(); |
468 |
> |
} catch(TimeoutException success){} |
469 |
> |
catch(Exception success){ |
470 |
> |
unexpectedException(); |
471 |
|
} |
351 |
– |
|
352 |
– |
|
472 |
|
} |
473 |
|
|
474 |
|
} |