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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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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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public class CyclicBarrierTest extends JSR166TestCase{ |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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} |
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public static Test suite() { |
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return new TestSuite(CyclicBarrierTest.class); |
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} |
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1.3 |
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private volatile int countAction; |
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private class MyAction implements Runnable { |
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public void run() { ++countAction; } |
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} |
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/** |
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* Creating with negative parties throws IAE |
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*/ |
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public void testConstructor1() { |
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try { |
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new CyclicBarrier(-1, (Runnable)null); |
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shouldThrow(); |
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} catch(IllegalArgumentException e){} |
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} |
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/** |
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* Creating with negative parties and no action throws IAE |
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*/ |
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public void testConstructor2() { |
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try { |
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new CyclicBarrier(-1); |
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shouldThrow(); |
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} catch(IllegalArgumentException e){} |
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} |
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1.3 |
/** |
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* getParties returns the number of parties given in constructor |
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*/ |
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public void testGetParties() { |
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CyclicBarrier b = new CyclicBarrier(2); |
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assertEquals(2, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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} |
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1.3 |
/** |
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* A 1-party barrier triggers properly |
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*/ |
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public void testSingleParty() { |
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try { |
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CyclicBarrier b = new CyclicBarrier(1); |
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assertEquals(1, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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b.await(); |
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b.await(); |
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assertEquals(0, b.getNumberWaiting()); |
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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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* The supplied barrier action is run at barrier |
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*/ |
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public void testBarrierAction() { |
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try { |
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countAction = 0; |
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CyclicBarrier b = new CyclicBarrier(1, new MyAction()); |
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assertEquals(1, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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b.await(); |
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b.await(); |
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assertEquals(0, b.getNumberWaiting()); |
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assertEquals(countAction, 2); |
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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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* A 2-party/thread barrier triggers properly |
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*/ |
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public void testTwoParties() { |
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final CyclicBarrier b = new CyclicBarrier(2); |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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try { |
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b.await(); |
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b.await(); |
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b.await(); |
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b.await(); |
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} catch(Exception e){ |
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threadUnexpectedException(); |
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}}}); |
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try { |
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t.start(); |
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b.await(); |
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b.await(); |
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b.await(); |
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b.await(); |
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t.join(); |
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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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* An interruption in one party causes others waiting in await to |
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* throw BrokenBarrierException |
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*/ |
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public void testAwait1_Interrupted_BrokenBarrier() { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = new Thread(new Runnable() { |
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public void run() { |
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try { |
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c.await(); |
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threadShouldThrow(); |
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} catch(InterruptedException success){} |
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catch(Exception b){ |
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threadUnexpectedException(); |
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} |
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} |
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}); |
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Thread t2 = new Thread(new Runnable() { |
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public void run() { |
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try { |
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c.await(); |
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threadShouldThrow(); |
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} catch(BrokenBarrierException success){ |
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} catch(Exception i){ |
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1.4 |
threadUnexpectedException(); |
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1.1 |
} |
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} |
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}); |
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try { |
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t1.start(); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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t1.interrupt(); |
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t1.join(); |
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t2.join(); |
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} catch(InterruptedException e){ |
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unexpectedException(); |
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1.1 |
} |
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} |
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1.3 |
/** |
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1.4 |
* An interruption in one party causes others waiting in timed await to |
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* throw BrokenBarrierException |
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1.3 |
*/ |
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public void testAwait2_Interrupted_BrokenBarrier() { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = new Thread(new Runnable() { |
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1.3 |
public void run() { |
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try { |
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1.1 |
c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
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threadShouldThrow(); |
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1.1 |
} catch(InterruptedException success){ |
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} catch(Exception b){ |
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1.4 |
threadUnexpectedException(); |
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1.1 |
} |
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} |
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}); |
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Thread t2 = new Thread(new Runnable() { |
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public void run() { |
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try { |
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1.1 |
c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
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1.3 |
threadShouldThrow(); |
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1.1 |
} catch(BrokenBarrierException success){ |
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} catch(Exception i){ |
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threadUnexpectedException(); |
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} |
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} |
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}); |
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try { |
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t1.start(); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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t1.interrupt(); |
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t1.join(); |
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t2.join(); |
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} catch(InterruptedException e){ |
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unexpectedException(); |
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1.1 |
} |
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} |
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1.3 |
/** |
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* A timeout in timed await throws TimeoutException |
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*/ |
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public void testAwait3_TimeOutException() { |
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final CyclicBarrier c = new CyclicBarrier(2); |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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try { |
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1.1 |
c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
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threadShouldThrow(); |
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} catch(TimeoutException success){ |
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} catch(Exception b){ |
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threadUnexpectedException(); |
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} |
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} |
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}); |
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try { |
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t.start(); |
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t.join(); |
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} catch(InterruptedException e){ |
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1.3 |
unexpectedException(); |
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1.1 |
} |
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} |
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1.4 |
/** |
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* A reset of an active barrier causes waiting threads to throw |
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* BrokenBarrierException |
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*/ |
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public void testReset_BrokenBarrier() { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = new Thread(new Runnable() { |
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public void run() { |
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try { |
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c.await(); |
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threadShouldThrow(); |
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} catch(BrokenBarrierException success){} |
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catch(Exception b){ |
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threadUnexpectedException(); |
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} |
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} |
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}); |
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Thread t2 = new Thread(new Runnable() { |
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public void run() { |
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try { |
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c.await(); |
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threadShouldThrow(); |
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} catch(BrokenBarrierException success){ |
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} catch(Exception i){ |
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threadUnexpectedException(); |
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} |
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} |
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}); |
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try { |
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t1.start(); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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c.reset(); |
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t1.join(); |
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t2.join(); |
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} catch(InterruptedException e){ |
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unexpectedException(); |
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} |
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} |
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/** |
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* A reset before threads enter barrier does not throw |
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* BrokenBarrierException |
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*/ |
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public void testReset_NoBrokenBarrier() { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = new Thread(new Runnable() { |
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public void run() { |
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try { |
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c.await(); |
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} catch(Exception b){ |
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threadUnexpectedException(); |
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} |
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} |
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}); |
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Thread t2 = new Thread(new Runnable() { |
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public void run() { |
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try { |
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c.await(); |
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} catch(Exception i){ |
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threadUnexpectedException(); |
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} |
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} |
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}); |
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try { |
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c.reset(); |
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t1.start(); |
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t2.start(); |
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c.await(); |
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t1.join(); |
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t2.join(); |
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} catch(Exception e){ |
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unexpectedException(); |
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} |
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} |
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dl |
1.1 |
} |