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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/publicdomain/zero/1.0/ |
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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.*; |
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import java.util.concurrent.*; |
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import java.util.concurrent.locks.*; |
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import java.util.concurrent.atomic.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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|
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public class CyclicBarrierTest extends JSR166TestCase{ |
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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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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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return new TestSuite(CyclicBarrierTest.class); |
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} |
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|
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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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|
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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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} catch (IllegalArgumentException success) {} |
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} |
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|
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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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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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* |
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* getParties returns the number of parties given in constructor |
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*/ |
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public void testConstructor3() { |
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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(2, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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} |
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|
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/** |
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* |
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* A 1-party barrier triggers after single await |
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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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public void testSingleParty() throws Exception { |
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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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|
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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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public void testBarrierAction() throws Exception { |
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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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|
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|
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/** |
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* |
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* A 2-party/thread barrier triggers after both threads invoke await |
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*/ |
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public void testTwoParties() { |
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public void testTwoParties() throws Exception { |
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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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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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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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}}); |
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|
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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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awaitTermination(t); |
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} |
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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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* 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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final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
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Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
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public void realRun() throws Exception { |
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pleaseInterrupt.countDown(); |
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c.await(); |
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}}; |
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Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
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public void realRun() throws Exception { |
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pleaseInterrupt.countDown(); |
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c.await(); |
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}}; |
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|
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t1.start(); |
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t2.start(); |
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await(pleaseInterrupt); |
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t1.interrupt(); |
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awaitTermination(t1); |
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awaitTermination(t2); |
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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 timed await to |
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* throw BrokenBarrierException |
133 |
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*/ |
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public void testAwait2_Interrupted_BrokenBarrier() throws Exception { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
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Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
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public void realRun() throws Exception { |
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pleaseInterrupt.countDown(); |
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c.await(LONG_DELAY_MS, MILLISECONDS); |
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}}; |
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Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
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public void realRun() throws Exception { |
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pleaseInterrupt.countDown(); |
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c.await(LONG_DELAY_MS, MILLISECONDS); |
146 |
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}}; |
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|
148 |
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t1.start(); |
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t2.start(); |
150 |
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await(pleaseInterrupt); |
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t1.interrupt(); |
152 |
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awaitTermination(t1); |
153 |
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awaitTermination(t2); |
154 |
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} |
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|
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/** |
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* |
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* A timeout in timed await throws TimeoutException |
158 |
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*/ |
159 |
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public void testAwait1_Interrupted_BrokenBarrier() { |
159 |
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public void testAwait3_TimeoutException() throws InterruptedException { |
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final CyclicBarrier c = new CyclicBarrier(2); |
161 |
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Thread t = newStartedThread(new CheckedRunnable() { |
162 |
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public void realRun() throws Exception { |
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long startTime = System.nanoTime(); |
164 |
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try { |
165 |
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c.await(timeoutMillis(), MILLISECONDS); |
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shouldThrow(); |
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} catch (TimeoutException success) {} |
168 |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
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}}); |
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|
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awaitTermination(t); |
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} |
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|
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/** |
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* A timeout in one party causes others waiting in timed await to |
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* throw BrokenBarrierException |
177 |
> |
*/ |
178 |
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public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = new Thread(new Runnable() { |
181 |
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public void run() { |
182 |
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try { |
183 |
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c.await(); |
184 |
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threadShouldThrow(); |
185 |
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} catch(InterruptedException success){} |
186 |
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catch(Exception b){ |
187 |
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threadFail("should throw IE"); |
188 |
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} |
189 |
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} |
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}); |
191 |
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Thread t2 = new Thread(new Runnable() { |
192 |
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public void run() { |
180 |
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Thread t1 = newStartedThread(new CheckedRunnable() { |
181 |
> |
public void realRun() throws Exception { |
182 |
> |
try { |
183 |
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c.await(LONG_DELAY_MS, MILLISECONDS); |
184 |
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shouldThrow(); |
185 |
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} catch (BrokenBarrierException success) {} |
186 |
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}}); |
187 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
188 |
> |
public void realRun() throws Exception { |
189 |
> |
while (c.getNumberWaiting() == 0) |
190 |
> |
Thread.yield(); |
191 |
> |
long startTime = System.nanoTime(); |
192 |
> |
try { |
193 |
> |
c.await(timeoutMillis(), MILLISECONDS); |
194 |
> |
shouldThrow(); |
195 |
> |
} catch (TimeoutException success) {} |
196 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
197 |
> |
}}); |
198 |
> |
|
199 |
> |
awaitTermination(t1); |
200 |
> |
awaitTermination(t2); |
201 |
> |
} |
202 |
> |
|
203 |
> |
/** |
204 |
> |
* A timeout in one party causes others waiting in await to |
205 |
> |
* throw BrokenBarrierException |
206 |
> |
*/ |
207 |
> |
public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException { |
208 |
> |
final CyclicBarrier c = new CyclicBarrier(3); |
209 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
210 |
> |
public void realRun() throws Exception { |
211 |
> |
try { |
212 |
> |
c.await(); |
213 |
> |
shouldThrow(); |
214 |
> |
} catch (BrokenBarrierException success) {} |
215 |
> |
}}); |
216 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
217 |
> |
public void realRun() throws Exception { |
218 |
> |
while (c.getNumberWaiting() == 0) |
219 |
> |
Thread.yield(); |
220 |
> |
long startTime = System.nanoTime(); |
221 |
> |
try { |
222 |
> |
c.await(timeoutMillis(), MILLISECONDS); |
223 |
> |
shouldThrow(); |
224 |
> |
} catch (TimeoutException success) {} |
225 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
226 |
> |
}}); |
227 |
> |
|
228 |
> |
awaitTermination(t1); |
229 |
> |
awaitTermination(t2); |
230 |
> |
} |
231 |
> |
|
232 |
> |
/** |
233 |
> |
* A reset of an active barrier causes waiting threads to throw |
234 |
> |
* BrokenBarrierException |
235 |
> |
*/ |
236 |
> |
public void testReset_BrokenBarrier() throws InterruptedException { |
237 |
> |
final CyclicBarrier c = new CyclicBarrier(3); |
238 |
> |
final CountDownLatch pleaseReset = new CountDownLatch(2); |
239 |
> |
Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) { |
240 |
> |
public void realRun() throws Exception { |
241 |
> |
pleaseReset.countDown(); |
242 |
> |
c.await(); |
243 |
> |
}}; |
244 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
245 |
> |
public void realRun() throws Exception { |
246 |
> |
pleaseReset.countDown(); |
247 |
> |
c.await(); |
248 |
> |
}}; |
249 |
> |
|
250 |
> |
t1.start(); |
251 |
> |
t2.start(); |
252 |
> |
await(pleaseReset); |
253 |
> |
c.reset(); |
254 |
> |
awaitTermination(t1); |
255 |
> |
awaitTermination(t2); |
256 |
> |
} |
257 |
> |
|
258 |
> |
/** |
259 |
> |
* A reset before threads enter barrier does not throw |
260 |
> |
* BrokenBarrierException |
261 |
> |
*/ |
262 |
> |
public void testReset_NoBrokenBarrier() throws Exception { |
263 |
> |
final CyclicBarrier c = new CyclicBarrier(3); |
264 |
> |
c.reset(); |
265 |
> |
|
266 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
267 |
> |
public void realRun() throws Exception { |
268 |
> |
c.await(); |
269 |
> |
}}); |
270 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
271 |
> |
public void realRun() throws Exception { |
272 |
> |
c.await(); |
273 |
> |
}}); |
274 |
> |
|
275 |
> |
c.await(); |
276 |
> |
awaitTermination(t1); |
277 |
> |
awaitTermination(t2); |
278 |
> |
} |
279 |
> |
|
280 |
> |
/** |
281 |
> |
* All threads block while a barrier is broken. |
282 |
> |
*/ |
283 |
> |
public void testReset_Leakage() throws InterruptedException { |
284 |
> |
final CyclicBarrier c = new CyclicBarrier(2); |
285 |
> |
final AtomicBoolean done = new AtomicBoolean(); |
286 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
287 |
> |
public void realRun() { |
288 |
> |
while (!done.get()) { |
289 |
|
try { |
290 |
+ |
while (c.isBroken()) |
291 |
+ |
c.reset(); |
292 |
+ |
|
293 |
|
c.await(); |
294 |
< |
threadShouldThrow(); |
141 |
< |
} catch(BrokenBarrierException success){ |
142 |
< |
} catch(Exception i){ |
143 |
< |
threadFail("should throw BBE"); |
294 |
> |
shouldThrow(); |
295 |
|
} |
296 |
< |
} |
297 |
< |
}); |
298 |
< |
try { |
296 |
> |
catch (BrokenBarrierException ok) {} |
297 |
> |
catch (InterruptedException ok) {} |
298 |
> |
}}}); |
299 |
> |
|
300 |
> |
for (int i = 0; i < 4; i++) { |
301 |
> |
delay(timeoutMillis()); |
302 |
> |
t.interrupt(); |
303 |
> |
} |
304 |
> |
done.set(true); |
305 |
> |
t.interrupt(); |
306 |
> |
awaitTermination(t); |
307 |
> |
} |
308 |
> |
|
309 |
> |
/** |
310 |
> |
* Reset of a non-broken barrier does not break barrier |
311 |
> |
*/ |
312 |
> |
public void testResetWithoutBreakage() throws Exception { |
313 |
> |
final CyclicBarrier barrier = new CyclicBarrier(3); |
314 |
> |
for (int i = 0; i < 3; i++) { |
315 |
> |
final CyclicBarrier start = new CyclicBarrier(3); |
316 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
317 |
> |
public void realRun() throws Exception { |
318 |
> |
start.await(); |
319 |
> |
barrier.await(); |
320 |
> |
}}); |
321 |
> |
|
322 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
323 |
> |
public void realRun() throws Exception { |
324 |
> |
start.await(); |
325 |
> |
barrier.await(); |
326 |
> |
}}); |
327 |
> |
|
328 |
> |
start.await(); |
329 |
> |
barrier.await(); |
330 |
> |
awaitTermination(t1); |
331 |
> |
awaitTermination(t2); |
332 |
> |
assertFalse(barrier.isBroken()); |
333 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
334 |
> |
if (i == 1) barrier.reset(); |
335 |
> |
assertFalse(barrier.isBroken()); |
336 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
337 |
> |
} |
338 |
> |
} |
339 |
> |
|
340 |
> |
/** |
341 |
> |
* Reset of a barrier after interruption reinitializes it. |
342 |
> |
*/ |
343 |
> |
public void testResetAfterInterrupt() throws Exception { |
344 |
> |
final CyclicBarrier barrier = new CyclicBarrier(3); |
345 |
> |
for (int i = 0; i < 2; i++) { |
346 |
> |
final CyclicBarrier start = new CyclicBarrier(3); |
347 |
> |
Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
348 |
> |
public void realRun() throws Exception { |
349 |
> |
start.await(); |
350 |
> |
barrier.await(); |
351 |
> |
}}; |
352 |
> |
|
353 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
354 |
> |
public void realRun() throws Exception { |
355 |
> |
start.await(); |
356 |
> |
barrier.await(); |
357 |
> |
}}; |
358 |
> |
|
359 |
|
t1.start(); |
360 |
|
t2.start(); |
361 |
< |
Thread.sleep(SHORT_DELAY_MS); |
361 |
> |
start.await(); |
362 |
|
t1.interrupt(); |
363 |
< |
t1.join(); |
364 |
< |
t2.join(); |
365 |
< |
} catch(InterruptedException e){ |
366 |
< |
unexpectedException(); |
363 |
> |
awaitTermination(t1); |
364 |
> |
awaitTermination(t2); |
365 |
> |
assertTrue(barrier.isBroken()); |
366 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
367 |
> |
barrier.reset(); |
368 |
> |
assertFalse(barrier.isBroken()); |
369 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
370 |
|
} |
371 |
|
} |
372 |
|
|
373 |
|
/** |
374 |
< |
* |
374 |
> |
* Reset of a barrier after timeout reinitializes it. |
375 |
|
*/ |
376 |
< |
public void testAwait2_Interrupted_BrokenBarrier() { |
377 |
< |
final CyclicBarrier c = new CyclicBarrier(3); |
378 |
< |
Thread t1 = new Thread(new Runnable() { |
379 |
< |
public void run() { |
376 |
> |
public void testResetAfterTimeout() throws Exception { |
377 |
> |
final CyclicBarrier barrier = new CyclicBarrier(3); |
378 |
> |
for (int i = 0; i < 2; i++) { |
379 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
380 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
381 |
> |
public void realRun() throws Exception { |
382 |
|
try { |
383 |
< |
c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
384 |
< |
threadShouldThrow(); |
385 |
< |
} catch(InterruptedException success){ |
386 |
< |
} catch(Exception b){ |
387 |
< |
threadFail("should throw IE"); |
388 |
< |
} |
389 |
< |
} |
390 |
< |
}); |
391 |
< |
Thread t2 = new Thread(new Runnable() { |
176 |
< |
public void run() { |
383 |
> |
barrier.await(); |
384 |
> |
shouldThrow(); |
385 |
> |
} catch (BrokenBarrierException success) {} |
386 |
> |
}}); |
387 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
388 |
> |
public void realRun() throws Exception { |
389 |
> |
while (barrier.getNumberWaiting() == 0) |
390 |
> |
Thread.yield(); |
391 |
> |
long startTime = System.nanoTime(); |
392 |
|
try { |
393 |
< |
c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
394 |
< |
threadShouldThrow(); |
395 |
< |
} catch(BrokenBarrierException success){ |
396 |
< |
} catch(Exception i){ |
397 |
< |
threadFail("should throw BBE"); |
398 |
< |
} |
399 |
< |
} |
400 |
< |
}); |
401 |
< |
try { |
402 |
< |
t1.start(); |
403 |
< |
t2.start(); |
404 |
< |
Thread.sleep(SHORT_DELAY_MS); |
405 |
< |
t1.interrupt(); |
406 |
< |
t1.join(); |
192 |
< |
t2.join(); |
193 |
< |
} catch(InterruptedException e){ |
194 |
< |
unexpectedException(); |
393 |
> |
barrier.await(timeoutMillis(), MILLISECONDS); |
394 |
> |
shouldThrow(); |
395 |
> |
} catch (TimeoutException success) {} |
396 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
397 |
> |
}}); |
398 |
> |
|
399 |
> |
awaitTermination(t1); |
400 |
> |
awaitTermination(t2); |
401 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
402 |
> |
assertTrue(barrier.isBroken()); |
403 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
404 |
> |
barrier.reset(); |
405 |
> |
assertFalse(barrier.isBroken()); |
406 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
407 |
|
} |
408 |
|
} |
409 |
< |
|
409 |
> |
|
410 |
|
/** |
411 |
< |
* |
411 |
> |
* Reset of a barrier after a failed command reinitializes it. |
412 |
|
*/ |
413 |
< |
public void testAwait3_TimeOutException() { |
414 |
< |
final CyclicBarrier c = new CyclicBarrier(2); |
415 |
< |
Thread t = new Thread(new Runnable() { |
416 |
< |
public void run() { |
417 |
< |
try { |
418 |
< |
c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
419 |
< |
threadShouldThrow(); |
420 |
< |
} catch(TimeoutException success){ |
421 |
< |
} catch(Exception b){ |
422 |
< |
threadFail("should throw TOE"); |
423 |
< |
|
424 |
< |
} |
425 |
< |
} |
426 |
< |
}); |
427 |
< |
try { |
428 |
< |
t.start(); |
429 |
< |
t.join(); |
430 |
< |
} catch(InterruptedException e){ |
431 |
< |
unexpectedException(); |
413 |
> |
public void testResetAfterCommandException() throws Exception { |
414 |
> |
final CyclicBarrier barrier = |
415 |
> |
new CyclicBarrier(3, new Runnable() { |
416 |
> |
public void run() { |
417 |
> |
throw new NullPointerException(); }}); |
418 |
> |
for (int i = 0; i < 2; i++) { |
419 |
> |
final CyclicBarrier start = new CyclicBarrier(3); |
420 |
> |
Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) { |
421 |
> |
public void realRun() throws Exception { |
422 |
> |
start.await(); |
423 |
> |
barrier.await(); |
424 |
> |
}}; |
425 |
> |
|
426 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
427 |
> |
public void realRun() throws Exception { |
428 |
> |
start.await(); |
429 |
> |
barrier.await(); |
430 |
> |
}}; |
431 |
> |
|
432 |
> |
t1.start(); |
433 |
> |
t2.start(); |
434 |
> |
start.await(); |
435 |
> |
while (barrier.getNumberWaiting() < 2) { Thread.yield(); } |
436 |
> |
try { |
437 |
> |
barrier.await(); |
438 |
> |
shouldThrow(); |
439 |
> |
} catch (NullPointerException success) {} |
440 |
> |
awaitTermination(t1); |
441 |
> |
awaitTermination(t2); |
442 |
> |
assertTrue(barrier.isBroken()); |
443 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
444 |
> |
barrier.reset(); |
445 |
> |
assertFalse(barrier.isBroken()); |
446 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
447 |
|
} |
448 |
|
} |
222 |
– |
|
449 |
|
} |