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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 TestCase{ |
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|
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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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|
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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 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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public void testConstructor1(){ |
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try{ |
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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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* 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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fail("should throw"); |
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} catch(IllegalArgumentException e){} |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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public void testConstructor2(){ |
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try{ |
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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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fail("should throw"); |
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} catch(IllegalArgumentException e){} |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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public void testConstructor3(){ |
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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 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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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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fail("unexpected exception"); |
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} |
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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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* A 1-party barrier triggers after single await |
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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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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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fail("unexpected exception"); |
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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() 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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public void testTwoParties(){ |
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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() 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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fail("unexpected exception"); |
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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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fail("unexpected exception"); |
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} |
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Thread t = new Thread(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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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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} |
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|
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|
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public void testAwait1_Interrupted_BrokenBarrier(){ |
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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() throws Exception { |
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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{ |
115 |
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c.await(); |
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fail("should throw"); |
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} catch(InterruptedException success){} |
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catch(Exception b){ |
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fail("should throw IE"); |
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} |
121 |
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} |
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}); |
123 |
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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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fail("should throw"); |
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} catch(BrokenBarrierException success){ |
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} catch(Exception i){ |
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fail("should throw BBE"); |
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Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
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public void realRun() throws Exception { |
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c.await(); |
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}}; |
116 |
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Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
117 |
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public void realRun() throws Exception { |
118 |
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c.await(); |
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}}; |
120 |
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|
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t1.start(); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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t1.interrupt(); |
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t1.join(); |
126 |
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t2.join(); |
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} |
128 |
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|
129 |
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/** |
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* An interruption in one party causes others waiting in timed await to |
131 |
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* throw BrokenBarrierException |
132 |
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*/ |
133 |
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public void testAwait2_Interrupted_BrokenBarrier() throws Exception { |
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final CyclicBarrier c = new CyclicBarrier(3); |
135 |
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Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
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public void realRun() throws Exception { |
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c.await(LONG_DELAY_MS, MILLISECONDS); |
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}}; |
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Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
140 |
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public void realRun() throws Exception { |
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c.await(LONG_DELAY_MS, MILLISECONDS); |
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}}; |
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|
144 |
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t1.start(); |
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t2.start(); |
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delay(SHORT_DELAY_MS); |
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t1.interrupt(); |
148 |
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t1.join(); |
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t2.join(); |
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} |
151 |
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|
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/** |
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* A timeout in timed await throws TimeoutException |
154 |
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*/ |
155 |
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public void testAwait3_TimeOutException() throws InterruptedException { |
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final CyclicBarrier c = new CyclicBarrier(2); |
157 |
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Thread t = new ThreadShouldThrow(TimeoutException.class) { |
158 |
> |
public void realRun() throws Exception { |
159 |
> |
c.await(SHORT_DELAY_MS, MILLISECONDS); |
160 |
> |
}}; |
161 |
> |
|
162 |
> |
t.start(); |
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t.join(); |
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} |
165 |
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|
166 |
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/** |
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* A timeout in one party causes others waiting in timed await to |
168 |
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* throw BrokenBarrierException |
169 |
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*/ |
170 |
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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 ThreadShouldThrow(TimeoutException.class) { |
173 |
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public void realRun() throws Exception { |
174 |
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c.await(SHORT_DELAY_MS, MILLISECONDS); |
175 |
> |
}}; |
176 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
177 |
> |
public void realRun() throws Exception { |
178 |
> |
c.await(MEDIUM_DELAY_MS, MILLISECONDS); |
179 |
> |
}}; |
180 |
> |
|
181 |
> |
t1.start(); |
182 |
> |
t2.start(); |
183 |
> |
t1.join(); |
184 |
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t2.join(); |
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> |
} |
186 |
> |
|
187 |
> |
/** |
188 |
> |
* A timeout in one party causes others waiting in await to |
189 |
> |
* throw BrokenBarrierException |
190 |
> |
*/ |
191 |
> |
public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException { |
192 |
> |
final CyclicBarrier c = new CyclicBarrier(3); |
193 |
> |
Thread t1 = new ThreadShouldThrow(TimeoutException.class) { |
194 |
> |
public void realRun() throws Exception { |
195 |
> |
c.await(SHORT_DELAY_MS, MILLISECONDS); |
196 |
> |
}}; |
197 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
198 |
> |
public void realRun() throws Exception { |
199 |
> |
c.await(); |
200 |
> |
}}; |
201 |
> |
|
202 |
> |
t1.start(); |
203 |
> |
t2.start(); |
204 |
> |
t1.join(); |
205 |
> |
t2.join(); |
206 |
> |
} |
207 |
> |
|
208 |
> |
/** |
209 |
> |
* A reset of an active barrier causes waiting threads to throw |
210 |
> |
* BrokenBarrierException |
211 |
> |
*/ |
212 |
> |
public void testReset_BrokenBarrier() throws InterruptedException { |
213 |
> |
final CyclicBarrier c = new CyclicBarrier(3); |
214 |
> |
Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) { |
215 |
> |
public void realRun() throws Exception { |
216 |
> |
c.await(); |
217 |
> |
}}; |
218 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
219 |
> |
public void realRun() throws Exception { |
220 |
> |
c.await(); |
221 |
> |
}}; |
222 |
> |
|
223 |
> |
t1.start(); |
224 |
> |
t2.start(); |
225 |
> |
delay(SHORT_DELAY_MS); |
226 |
> |
c.reset(); |
227 |
> |
t1.join(); |
228 |
> |
t2.join(); |
229 |
> |
} |
230 |
> |
|
231 |
> |
/** |
232 |
> |
* A reset before threads enter barrier does not throw |
233 |
> |
* BrokenBarrierException |
234 |
> |
*/ |
235 |
> |
public void testReset_NoBrokenBarrier() throws Exception { |
236 |
> |
final CyclicBarrier c = new CyclicBarrier(3); |
237 |
> |
Thread t1 = new Thread(new CheckedRunnable() { |
238 |
> |
public void realRun() throws Exception { |
239 |
> |
c.await(); |
240 |
> |
}}); |
241 |
> |
Thread t2 = new Thread(new CheckedRunnable() { |
242 |
> |
public void realRun() throws Exception { |
243 |
> |
c.await(); |
244 |
> |
}}); |
245 |
> |
|
246 |
> |
c.reset(); |
247 |
> |
t1.start(); |
248 |
> |
t2.start(); |
249 |
> |
c.await(); |
250 |
> |
t1.join(); |
251 |
> |
t2.join(); |
252 |
> |
} |
253 |
> |
|
254 |
> |
/** |
255 |
> |
* All threads block while a barrier is broken. |
256 |
> |
*/ |
257 |
> |
public void testReset_Leakage() throws InterruptedException { |
258 |
> |
final CyclicBarrier c = new CyclicBarrier(2); |
259 |
> |
final AtomicBoolean done = new AtomicBoolean(); |
260 |
> |
Thread t = new Thread() { |
261 |
> |
public void run() { |
262 |
> |
while (!done.get()) { |
263 |
> |
try { |
264 |
> |
while (c.isBroken()) |
265 |
> |
c.reset(); |
266 |
> |
|
267 |
> |
c.await(); |
268 |
> |
threadFail("await should not return"); |
269 |
> |
} |
270 |
> |
catch (BrokenBarrierException e) { |
271 |
> |
} |
272 |
> |
catch (InterruptedException ie) { |
273 |
> |
} |
274 |
|
} |
275 |
|
} |
276 |
< |
}); |
277 |
< |
try { |
276 |
> |
}; |
277 |
> |
|
278 |
> |
t.start(); |
279 |
> |
for (int i = 0; i < 4; i++) { |
280 |
> |
delay(SHORT_DELAY_MS); |
281 |
> |
t.interrupt(); |
282 |
> |
} |
283 |
> |
done.set(true); |
284 |
> |
t.interrupt(); |
285 |
> |
t.join(); |
286 |
> |
} |
287 |
> |
|
288 |
> |
/** |
289 |
> |
* Reset of a non-broken barrier does not break barrier |
290 |
> |
*/ |
291 |
> |
public void testResetWithoutBreakage() throws Exception { |
292 |
> |
final CyclicBarrier start = new CyclicBarrier(3); |
293 |
> |
final CyclicBarrier barrier = new CyclicBarrier(3); |
294 |
> |
for (int i = 0; i < 3; i++) { |
295 |
> |
Thread t1 = new Thread(new CheckedRunnable() { |
296 |
> |
public void realRun() throws Exception { |
297 |
> |
start.await(); |
298 |
> |
barrier.await(); |
299 |
> |
}}); |
300 |
> |
|
301 |
> |
Thread t2 = new Thread(new CheckedRunnable() { |
302 |
> |
public void realRun() throws Exception { |
303 |
> |
start.await(); |
304 |
> |
barrier.await(); |
305 |
> |
}}); |
306 |
> |
|
307 |
|
t1.start(); |
308 |
|
t2.start(); |
309 |
< |
Thread.sleep(SHORT_DELAY_MS); |
310 |
< |
t1.interrupt(); |
311 |
< |
t1.join(); |
309 |
> |
start.await(); |
310 |
> |
barrier.await(); |
311 |
> |
t1.join(); |
312 |
|
t2.join(); |
313 |
< |
} catch(InterruptedException e){ |
314 |
< |
fail("unexpected exception"); |
313 |
> |
assertFalse(barrier.isBroken()); |
314 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
315 |
> |
if (i == 1) barrier.reset(); |
316 |
> |
assertFalse(barrier.isBroken()); |
317 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
318 |
|
} |
319 |
|
} |
320 |
|
|
321 |
< |
public void testAwait2_Interrupted_BrokenBarrier(){ |
322 |
< |
final CyclicBarrier c = new CyclicBarrier(3); |
323 |
< |
Thread t1 = new Thread(new Runnable() { |
324 |
< |
public void run(){ |
325 |
< |
try{ |
326 |
< |
c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
327 |
< |
fail("should throw"); |
328 |
< |
} catch(InterruptedException success){ |
329 |
< |
} catch(Exception b){ |
330 |
< |
fail("should throw IE"); |
331 |
< |
} |
332 |
< |
} |
333 |
< |
}); |
334 |
< |
Thread t2 = new Thread(new Runnable(){ |
335 |
< |
public void run(){ |
336 |
< |
try{ |
337 |
< |
c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
338 |
< |
fail("should throw"); |
339 |
< |
} catch(BrokenBarrierException success){ |
164 |
< |
} catch(Exception i){ |
165 |
< |
fail("should throw BBE"); |
166 |
< |
} |
167 |
< |
} |
168 |
< |
}); |
169 |
< |
try { |
321 |
> |
/** |
322 |
> |
* Reset of a barrier after interruption reinitializes it. |
323 |
> |
*/ |
324 |
> |
public void testResetAfterInterrupt() throws Exception { |
325 |
> |
final CyclicBarrier start = new CyclicBarrier(3); |
326 |
> |
final CyclicBarrier barrier = new CyclicBarrier(3); |
327 |
> |
for (int i = 0; i < 2; i++) { |
328 |
> |
Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
329 |
> |
public void realRun() throws Exception { |
330 |
> |
start.await(); |
331 |
> |
barrier.await(); |
332 |
> |
}}; |
333 |
> |
|
334 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
335 |
> |
public void realRun() throws Exception { |
336 |
> |
start.await(); |
337 |
> |
barrier.await(); |
338 |
> |
}}; |
339 |
> |
|
340 |
|
t1.start(); |
341 |
|
t2.start(); |
342 |
< |
Thread.sleep(SHORT_DELAY_MS); |
342 |
> |
start.await(); |
343 |
|
t1.interrupt(); |
344 |
< |
t1.join(); |
344 |
> |
t1.join(); |
345 |
|
t2.join(); |
346 |
< |
} catch(InterruptedException e){ |
347 |
< |
fail("unexpected exception"); |
346 |
> |
assertTrue(barrier.isBroken()); |
347 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
348 |
> |
barrier.reset(); |
349 |
> |
assertFalse(barrier.isBroken()); |
350 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
351 |
|
} |
352 |
|
} |
353 |
< |
|
354 |
< |
public void testAwait3_TimeOutException(){ |
355 |
< |
final CyclicBarrier c = new CyclicBarrier(2); |
356 |
< |
Thread t = new Thread(new Runnable() { |
357 |
< |
public void run(){ |
358 |
< |
try{ |
359 |
< |
c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
360 |
< |
fail("should throw"); |
361 |
< |
} catch(TimeoutException success){ |
362 |
< |
} catch(Exception b){ |
363 |
< |
fail("should throw TOE"); |
364 |
< |
|
365 |
< |
} |
366 |
< |
} |
367 |
< |
}); |
368 |
< |
try { |
369 |
< |
t.start(); |
370 |
< |
t.join(); |
371 |
< |
} catch(InterruptedException e){ |
372 |
< |
fail("unexpected exception"); |
353 |
> |
|
354 |
> |
/** |
355 |
> |
* Reset of a barrier after timeout reinitializes it. |
356 |
> |
*/ |
357 |
> |
public void testResetAfterTimeout() throws Exception { |
358 |
> |
final CyclicBarrier start = new CyclicBarrier(2); |
359 |
> |
final CyclicBarrier barrier = new CyclicBarrier(3); |
360 |
> |
for (int i = 0; i < 2; i++) { |
361 |
> |
Thread t1 = new ThreadShouldThrow(TimeoutException.class) { |
362 |
> |
public void realRun() throws Exception { |
363 |
> |
start.await(); |
364 |
> |
barrier.await(SHORT_DELAY_MS, MILLISECONDS); |
365 |
> |
}}; |
366 |
> |
|
367 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
368 |
> |
public void realRun() throws Exception { |
369 |
> |
start.await(); |
370 |
> |
barrier.await(); |
371 |
> |
}}; |
372 |
> |
|
373 |
> |
t1.start(); |
374 |
> |
t2.start(); |
375 |
> |
t1.join(); |
376 |
> |
t2.join(); |
377 |
> |
assertTrue(barrier.isBroken()); |
378 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
379 |
> |
barrier.reset(); |
380 |
> |
assertFalse(barrier.isBroken()); |
381 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
382 |
> |
} |
383 |
> |
} |
384 |
> |
|
385 |
> |
|
386 |
> |
/** |
387 |
> |
* Reset of a barrier after a failed command reinitializes it. |
388 |
> |
*/ |
389 |
> |
public void testResetAfterCommandException() throws Exception { |
390 |
> |
final CyclicBarrier start = new CyclicBarrier(3); |
391 |
> |
final CyclicBarrier barrier = |
392 |
> |
new CyclicBarrier(3, new Runnable() { |
393 |
> |
public void run() { |
394 |
> |
throw new NullPointerException(); }}); |
395 |
> |
for (int i = 0; i < 2; i++) { |
396 |
> |
Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) { |
397 |
> |
public void realRun() throws Exception { |
398 |
> |
start.await(); |
399 |
> |
barrier.await(); |
400 |
> |
}}; |
401 |
> |
|
402 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
403 |
> |
public void realRun() throws Exception { |
404 |
> |
start.await(); |
405 |
> |
barrier.await(); |
406 |
> |
}}; |
407 |
> |
|
408 |
> |
t1.start(); |
409 |
> |
t2.start(); |
410 |
> |
start.await(); |
411 |
> |
while (barrier.getNumberWaiting() < 2) { Thread.yield(); } |
412 |
> |
try { |
413 |
> |
barrier.await(); |
414 |
> |
shouldThrow(); |
415 |
> |
} catch (NullPointerException success) {} |
416 |
> |
t1.join(); |
417 |
> |
t2.join(); |
418 |
> |
assertTrue(barrier.isBroken()); |
419 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
420 |
> |
barrier.reset(); |
421 |
> |
assertFalse(barrier.isBroken()); |
422 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
423 |
|
} |
424 |
|
} |
202 |
– |
|
425 |
|
} |