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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 static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import java.io.*; |
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|
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public class SynchronousQueueTest extends JSR166TestCase { |
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|
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public static class Fair extends BlockingQueueTest { |
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protected BlockingQueue emptyCollection() { |
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return new SynchronousQueue(true); |
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} |
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} |
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|
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public static class NonFair extends BlockingQueueTest { |
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protected BlockingQueue emptyCollection() { |
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return new SynchronousQueue(false); |
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} |
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} |
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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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junit.textui.TestRunner.run(suite()); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(SynchronousQueueTest.class); |
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return newTestSuite(SynchronousQueueTest.class, |
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new Fair().testSuite(), |
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new NonFair().testSuite()); |
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} |
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|
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/** |
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* A SynchronousQueue is both empty and full |
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* Any SynchronousQueue is both empty and full |
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*/ |
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public void testEmptyFull() { |
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SynchronousQueue q = new SynchronousQueue(); |
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public void testEmptyFull() { testEmptyFull(false); } |
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public void testEmptyFull_fair() { testEmptyFull(true); } |
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public void testEmptyFull(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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assertTrue(q.isEmpty()); |
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assertEquals(0, q.size()); |
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assertEquals(0, q.size()); |
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assertEquals(0, q.remainingCapacity()); |
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assertFalse(q.offer(zero)); |
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} |
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* offer(null) throws NPE |
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*/ |
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public void testOfferNull() { |
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try { |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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q.offer(null); |
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shouldThrow(); |
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} catch (NullPointerException success) { } |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* add(null) throws NPE |
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*/ |
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public void testAddNull() { |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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q.add(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* add throws ISE if no active taker |
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*/ |
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public void testAdd() { |
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try { |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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assertEquals(0, q.remainingCapacity()); |
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q.add(one); |
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shouldThrow(); |
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} catch (IllegalStateException success){ |
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} |
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} catch (IllegalStateException success) {} |
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} |
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|
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/** |
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SynchronousQueue q = new SynchronousQueue(); |
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q.addAll(null); |
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shouldThrow(); |
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} |
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catch (NullPointerException success) {} |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* addAll(this) throws IAE |
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*/ |
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public void testAddAllSelf() { |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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q.addAll(q); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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* addAll of a collection with null elements throws NPE |
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*/ |
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Integer[] ints = new Integer[1]; |
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q.addAll(Arrays.asList(ints)); |
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shouldThrow(); |
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} |
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catch (NullPointerException success) {} |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* addAll throws ISE if no active taker |
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*/ |
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ints[i] = new Integer(i); |
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q.addAll(Arrays.asList(ints)); |
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shouldThrow(); |
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} |
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catch (IllegalStateException success) {} |
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} catch (IllegalStateException success) {} |
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} |
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|
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/** |
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* put(null) throws NPE |
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*/ |
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public void testPutNull() { |
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try { |
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public void testPutNull() throws InterruptedException { |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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q.put(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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catch (InterruptedException ie) { |
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unexpectedException(); |
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} |
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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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* put blocks interruptibly if no active taker |
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*/ |
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public void testBlockingPut() { |
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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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SynchronousQueue q = new SynchronousQueue(); |
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q.put(zero); |
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threadShouldThrow(); |
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} catch (InterruptedException ie){ |
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} |
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}}); |
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t.start(); |
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try { |
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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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t.join(); |
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} |
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catch (InterruptedException ie) { |
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unexpectedException(); |
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} |
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public void testBlockingPut() { testBlockingPut(false); } |
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public void testBlockingPut_fair() { testBlockingPut(true); } |
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public void testBlockingPut(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
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Thread t = newStartedThread(new CheckedRunnable() { |
162 |
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public void realRun() throws InterruptedException { |
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Thread.currentThread().interrupt(); |
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try { |
165 |
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q.put(99); |
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shouldThrow(); |
167 |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
169 |
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|
170 |
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pleaseInterrupt.countDown(); |
171 |
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try { |
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q.put(99); |
173 |
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shouldThrow(); |
174 |
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} catch (InterruptedException success) {} |
175 |
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assertFalse(Thread.interrupted()); |
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}}); |
177 |
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|
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await(pleaseInterrupt); |
179 |
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assertThreadStaysAlive(t); |
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t.interrupt(); |
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awaitTermination(t); |
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assertEquals(0, q.remainingCapacity()); |
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} |
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|
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/** |
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* put blocks waiting for take |
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* put blocks interruptibly waiting for take |
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*/ |
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public void testPutWithTake() { |
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final SynchronousQueue q = new SynchronousQueue(); |
190 |
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Thread t = new Thread(new Runnable() { |
191 |
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public void run() { |
192 |
< |
int added = 0; |
193 |
< |
try { |
194 |
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q.put(new Object()); |
195 |
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++added; |
196 |
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q.put(new Object()); |
197 |
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++added; |
198 |
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q.put(new Object()); |
199 |
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++added; |
200 |
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q.put(new Object()); |
201 |
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++added; |
202 |
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threadShouldThrow(); |
203 |
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} catch (InterruptedException e){ |
204 |
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assertTrue(added >= 1); |
205 |
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} |
206 |
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} |
207 |
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}); |
208 |
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try { |
209 |
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t.start(); |
210 |
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Thread.sleep(SHORT_DELAY_MS); |
211 |
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q.take(); |
212 |
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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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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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public void testPutWithTake() { testPutWithTake(false); } |
189 |
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public void testPutWithTake_fair() { testPutWithTake(true); } |
190 |
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public void testPutWithTake(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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final CountDownLatch pleaseTake = new CountDownLatch(1); |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
194 |
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Thread t = newStartedThread(new CheckedRunnable() { |
195 |
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public void realRun() throws InterruptedException { |
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pleaseTake.countDown(); |
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q.put(one); |
198 |
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|
199 |
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pleaseInterrupt.countDown(); |
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try { |
201 |
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q.put(99); |
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shouldThrow(); |
203 |
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} catch (InterruptedException success) {} |
204 |
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assertFalse(Thread.interrupted()); |
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}}); |
206 |
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|
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await(pleaseTake); |
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assertEquals(q.remainingCapacity(), 0); |
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try { assertSame(one, q.take()); } |
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catch (InterruptedException e) { threadUnexpectedException(e); } |
211 |
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|
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await(pleaseInterrupt); |
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assertThreadStaysAlive(t); |
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t.interrupt(); |
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awaitTermination(t); |
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assertEquals(q.remainingCapacity(), 0); |
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} |
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|
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/** |
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* timed offer times out if elements not taken |
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*/ |
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public void testTimedOffer() { |
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final SynchronousQueue q = new SynchronousQueue(); |
224 |
< |
Thread t = new Thread(new Runnable() { |
225 |
< |
public void run() { |
226 |
< |
try { |
227 |
< |
|
228 |
< |
threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
229 |
< |
q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS); |
230 |
< |
threadShouldThrow(); |
231 |
< |
} catch (InterruptedException success){} |
232 |
< |
} |
233 |
< |
}); |
234 |
< |
|
235 |
< |
try { |
236 |
< |
t.start(); |
237 |
< |
Thread.sleep(SMALL_DELAY_MS); |
198 |
< |
t.interrupt(); |
199 |
< |
t.join(); |
200 |
< |
} catch (Exception e){ |
201 |
< |
unexpectedException(); |
202 |
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} |
203 |
< |
} |
204 |
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|
222 |
> |
public void testTimedOffer() { testTimedOffer(false); } |
223 |
> |
public void testTimedOffer_fair() { testTimedOffer(true); } |
224 |
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public void testTimedOffer(boolean fair) { |
225 |
> |
final SynchronousQueue q = new SynchronousQueue(fair); |
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> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
227 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
228 |
> |
public void realRun() throws InterruptedException { |
229 |
> |
long startTime = System.nanoTime(); |
230 |
> |
assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS)); |
231 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
232 |
> |
pleaseInterrupt.countDown(); |
233 |
> |
try { |
234 |
> |
q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
235 |
> |
shouldThrow(); |
236 |
> |
} catch (InterruptedException success) {} |
237 |
> |
}}); |
238 |
|
|
239 |
< |
/** |
240 |
< |
* take blocks interruptibly when empty |
241 |
< |
*/ |
242 |
< |
public void testTakeFromEmpty() { |
210 |
< |
final SynchronousQueue q = new SynchronousQueue(); |
211 |
< |
Thread t = new Thread(new Runnable() { |
212 |
< |
public void run() { |
213 |
< |
try { |
214 |
< |
q.take(); |
215 |
< |
threadShouldThrow(); |
216 |
< |
} catch (InterruptedException success){ } |
217 |
< |
} |
218 |
< |
}); |
219 |
< |
try { |
220 |
< |
t.start(); |
221 |
< |
Thread.sleep(SHORT_DELAY_MS); |
222 |
< |
t.interrupt(); |
223 |
< |
t.join(); |
224 |
< |
} catch (Exception e){ |
225 |
< |
unexpectedException(); |
226 |
< |
} |
239 |
> |
await(pleaseInterrupt); |
240 |
> |
assertThreadStaysAlive(t); |
241 |
> |
t.interrupt(); |
242 |
> |
awaitTermination(t); |
243 |
|
} |
244 |
|
|
245 |
|
/** |
246 |
< |
* poll fails unless active taker |
246 |
> |
* poll return null if no active putter |
247 |
|
*/ |
248 |
|
public void testPoll() { |
249 |
|
SynchronousQueue q = new SynchronousQueue(); |
250 |
< |
assertNull(q.poll()); |
250 |
> |
assertNull(q.poll()); |
251 |
|
} |
252 |
|
|
253 |
|
/** |
254 |
< |
* timed pool with zero timeout times out if no active taker |
254 |
> |
* timed poll with zero timeout times out if no active putter |
255 |
|
*/ |
256 |
< |
public void testTimedPoll0() { |
257 |
< |
try { |
258 |
< |
SynchronousQueue q = new SynchronousQueue(); |
243 |
< |
assertNull(q.poll(0, TimeUnit.MILLISECONDS)); |
244 |
< |
} catch (InterruptedException e){ |
245 |
< |
unexpectedException(); |
246 |
< |
} |
256 |
> |
public void testTimedPoll0() throws InterruptedException { |
257 |
> |
SynchronousQueue q = new SynchronousQueue(); |
258 |
> |
assertNull(q.poll(0, MILLISECONDS)); |
259 |
|
} |
260 |
|
|
261 |
|
/** |
262 |
< |
* timed pool with nonzero timeout times out if no active taker |
262 |
> |
* timed poll with nonzero timeout times out if no active putter |
263 |
|
*/ |
264 |
< |
public void testTimedPoll() { |
265 |
< |
try { |
266 |
< |
SynchronousQueue q = new SynchronousQueue(); |
267 |
< |
assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
268 |
< |
} catch (InterruptedException e){ |
257 |
< |
unexpectedException(); |
258 |
< |
} |
259 |
< |
} |
260 |
< |
|
261 |
< |
/** |
262 |
< |
* Interrupted timed poll throws InterruptedException instead of |
263 |
< |
* returning timeout status |
264 |
< |
*/ |
265 |
< |
public void testInterruptedTimedPoll() { |
266 |
< |
Thread t = new Thread(new Runnable() { |
267 |
< |
public void run() { |
268 |
< |
try { |
269 |
< |
SynchronousQueue q = new SynchronousQueue(); |
270 |
< |
assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
271 |
< |
} catch (InterruptedException success){ |
272 |
< |
} |
273 |
< |
}}); |
274 |
< |
t.start(); |
275 |
< |
try { |
276 |
< |
Thread.sleep(SHORT_DELAY_MS); |
277 |
< |
t.interrupt(); |
278 |
< |
t.join(); |
279 |
< |
} |
280 |
< |
catch (InterruptedException ie) { |
281 |
< |
unexpectedException(); |
282 |
< |
} |
264 |
> |
public void testTimedPoll() throws InterruptedException { |
265 |
> |
SynchronousQueue q = new SynchronousQueue(); |
266 |
> |
long startTime = System.nanoTime(); |
267 |
> |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
268 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
269 |
|
} |
270 |
|
|
271 |
|
/** |
272 |
< |
* timed poll before a delayed offer fails; after offer succeeds; |
273 |
< |
* on interruption throws |
272 |
> |
* timed poll before a delayed offer times out, returning null; |
273 |
> |
* after offer succeeds; on interruption throws |
274 |
|
*/ |
275 |
< |
public void testTimedPollWithOffer() { |
276 |
< |
final SynchronousQueue q = new SynchronousQueue(); |
277 |
< |
Thread t = new Thread(new Runnable() { |
278 |
< |
public void run() { |
279 |
< |
try { |
280 |
< |
threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
281 |
< |
q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS); |
282 |
< |
q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS); |
283 |
< |
threadShouldThrow(); |
284 |
< |
} catch (InterruptedException success) { } |
285 |
< |
} |
286 |
< |
}); |
287 |
< |
try { |
288 |
< |
t.start(); |
289 |
< |
Thread.sleep(SMALL_DELAY_MS); |
290 |
< |
assertTrue(q.offer(zero, SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
291 |
< |
t.interrupt(); |
292 |
< |
t.join(); |
293 |
< |
} catch (Exception e){ |
294 |
< |
unexpectedException(); |
295 |
< |
} |
310 |
< |
} |
275 |
> |
public void testFairTimedPollWithOffer() throws InterruptedException { |
276 |
> |
final SynchronousQueue q = new SynchronousQueue(true); |
277 |
> |
final CountDownLatch pleaseOffer = new CountDownLatch(1); |
278 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
279 |
> |
public void realRun() throws InterruptedException { |
280 |
> |
long t0 = System.nanoTime(); |
281 |
> |
assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
282 |
> |
assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS); |
283 |
> |
|
284 |
> |
pleaseOffer.countDown(); |
285 |
> |
t0 = System.nanoTime(); |
286 |
> |
assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
287 |
> |
assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS); |
288 |
> |
|
289 |
> |
t0 = System.nanoTime(); |
290 |
> |
try { |
291 |
> |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
292 |
> |
shouldThrow(); |
293 |
> |
} catch (InterruptedException success) {} |
294 |
> |
assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS); |
295 |
> |
}}); |
296 |
|
|
297 |
+ |
assertTrue(pleaseOffer.await(MEDIUM_DELAY_MS, MILLISECONDS)); |
298 |
+ |
long t0 = System.nanoTime(); |
299 |
+ |
assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); |
300 |
+ |
assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS); |
301 |
+ |
|
302 |
+ |
t.interrupt(); |
303 |
+ |
awaitTermination(t, MEDIUM_DELAY_MS); |
304 |
+ |
} |
305 |
|
|
306 |
|
/** |
307 |
< |
* peek returns null |
307 |
> |
* peek() returns null if no active putter |
308 |
|
*/ |
309 |
|
public void testPeek() { |
310 |
|
SynchronousQueue q = new SynchronousQueue(); |
311 |
< |
assertNull(q.peek()); |
311 |
> |
assertNull(q.peek()); |
312 |
|
} |
313 |
|
|
314 |
|
/** |
315 |
< |
* element throws NSEE |
315 |
> |
* element() throws NSEE if no active putter |
316 |
|
*/ |
317 |
|
public void testElement() { |
318 |
|
SynchronousQueue q = new SynchronousQueue(); |
319 |
|
try { |
320 |
|
q.element(); |
321 |
|
shouldThrow(); |
322 |
< |
} |
330 |
< |
catch (NoSuchElementException success) {} |
322 |
> |
} catch (NoSuchElementException success) {} |
323 |
|
} |
324 |
|
|
325 |
|
/** |
326 |
< |
* remove throws NSEE if no active taker |
326 |
> |
* remove() throws NSEE if no active putter |
327 |
|
*/ |
328 |
|
public void testRemove() { |
329 |
|
SynchronousQueue q = new SynchronousQueue(); |
330 |
|
try { |
331 |
|
q.remove(); |
332 |
|
shouldThrow(); |
333 |
< |
} catch (NoSuchElementException success){ |
342 |
< |
} |
333 |
> |
} catch (NoSuchElementException success) {} |
334 |
|
} |
335 |
|
|
336 |
|
/** |
341 |
|
assertFalse(q.remove(zero)); |
342 |
|
assertTrue(q.isEmpty()); |
343 |
|
} |
344 |
< |
|
344 |
> |
|
345 |
|
/** |
346 |
|
* contains returns false |
347 |
|
*/ |
392 |
|
assertFalse(q.containsAll(Arrays.asList(ints))); |
393 |
|
} |
394 |
|
|
404 |
– |
|
395 |
|
/** |
396 |
|
* toArray is empty |
397 |
|
*/ |
398 |
|
public void testToArray() { |
399 |
|
SynchronousQueue q = new SynchronousQueue(); |
400 |
< |
Object[] o = q.toArray(); |
400 |
> |
Object[] o = q.toArray(); |
401 |
|
assertEquals(o.length, 0); |
402 |
|
} |
403 |
|
|
406 |
|
*/ |
407 |
|
public void testToArray2() { |
408 |
|
SynchronousQueue q = new SynchronousQueue(); |
409 |
< |
Integer[] ints = new Integer[1]; |
409 |
> |
Integer[] ints = new Integer[1]; |
410 |
|
assertNull(ints[0]); |
411 |
|
} |
412 |
< |
|
412 |
> |
|
413 |
> |
/** |
414 |
> |
* toArray(null) throws NPE |
415 |
> |
*/ |
416 |
> |
public void testToArray_BadArg() { |
417 |
> |
SynchronousQueue q = new SynchronousQueue(); |
418 |
> |
try { |
419 |
> |
Object o[] = q.toArray(null); |
420 |
> |
shouldThrow(); |
421 |
> |
} catch (NullPointerException success) {} |
422 |
> |
} |
423 |
> |
|
424 |
|
/** |
425 |
|
* iterator does not traverse any elements |
426 |
|
*/ |
427 |
|
public void testIterator() { |
428 |
|
SynchronousQueue q = new SynchronousQueue(); |
429 |
< |
Iterator it = q.iterator(); |
429 |
> |
Iterator it = q.iterator(); |
430 |
|
assertFalse(it.hasNext()); |
431 |
|
try { |
432 |
|
Object x = it.next(); |
433 |
|
shouldThrow(); |
434 |
< |
} |
434 |
< |
catch (NoSuchElementException success) {} |
434 |
> |
} catch (NoSuchElementException success) {} |
435 |
|
} |
436 |
|
|
437 |
|
/** |
439 |
|
*/ |
440 |
|
public void testIteratorRemove() { |
441 |
|
SynchronousQueue q = new SynchronousQueue(); |
442 |
< |
Iterator it = q.iterator(); |
442 |
> |
Iterator it = q.iterator(); |
443 |
|
try { |
444 |
|
it.remove(); |
445 |
|
shouldThrow(); |
446 |
< |
} |
447 |
< |
catch (IllegalStateException success) {} |
446 |
> |
} catch (IllegalStateException success) {} |
447 |
|
} |
448 |
|
|
449 |
|
/** |
453 |
|
SynchronousQueue q = new SynchronousQueue(); |
454 |
|
String s = q.toString(); |
455 |
|
assertNotNull(s); |
456 |
< |
} |
458 |
< |
|
456 |
> |
} |
457 |
|
|
458 |
|
/** |
459 |
|
* offer transfers elements across Executor tasks |
461 |
|
public void testOfferInExecutor() { |
462 |
|
final SynchronousQueue q = new SynchronousQueue(); |
463 |
|
ExecutorService executor = Executors.newFixedThreadPool(2); |
464 |
< |
final Integer one = new Integer(1); |
464 |
> |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
465 |
|
|
466 |
< |
executor.execute(new Runnable() { |
467 |
< |
public void run() { |
468 |
< |
threadAssertFalse(q.offer(one)); |
469 |
< |
try { |
470 |
< |
threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS)); |
471 |
< |
threadAssertEquals(0, q.remainingCapacity()); |
472 |
< |
} |
473 |
< |
catch (InterruptedException e) { |
474 |
< |
threadUnexpectedException(); |
475 |
< |
} |
476 |
< |
} |
477 |
< |
}); |
466 |
> |
executor.execute(new CheckedRunnable() { |
467 |
> |
public void realRun() throws InterruptedException { |
468 |
> |
assertFalse(q.offer(one)); |
469 |
> |
threadsStarted.await(); |
470 |
> |
assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS)); |
471 |
> |
assertEquals(0, q.remainingCapacity()); |
472 |
> |
}}); |
473 |
> |
|
474 |
> |
executor.execute(new CheckedRunnable() { |
475 |
> |
public void realRun() throws InterruptedException { |
476 |
> |
threadsStarted.await(); |
477 |
> |
assertSame(one, q.take()); |
478 |
> |
}}); |
479 |
|
|
481 |
– |
executor.execute(new Runnable() { |
482 |
– |
public void run() { |
483 |
– |
try { |
484 |
– |
Thread.sleep(SMALL_DELAY_MS); |
485 |
– |
threadAssertEquals(one, q.take()); |
486 |
– |
} |
487 |
– |
catch (InterruptedException e) { |
488 |
– |
threadUnexpectedException(); |
489 |
– |
} |
490 |
– |
} |
491 |
– |
}); |
492 |
– |
|
480 |
|
joinPool(executor); |
494 |
– |
|
481 |
|
} |
482 |
|
|
483 |
|
/** |
484 |
< |
* poll retrieves elements across Executor threads |
484 |
> |
* timed poll retrieves elements across Executor threads |
485 |
|
*/ |
486 |
|
public void testPollInExecutor() { |
487 |
|
final SynchronousQueue q = new SynchronousQueue(); |
488 |
+ |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
489 |
|
ExecutorService executor = Executors.newFixedThreadPool(2); |
490 |
< |
executor.execute(new Runnable() { |
491 |
< |
public void run() { |
492 |
< |
threadAssertNull(q.poll()); |
493 |
< |
try { |
494 |
< |
threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS)); |
495 |
< |
threadAssertTrue(q.isEmpty()); |
496 |
< |
} |
497 |
< |
catch (InterruptedException e) { |
498 |
< |
threadUnexpectedException(); |
499 |
< |
} |
500 |
< |
} |
501 |
< |
}); |
490 |
> |
executor.execute(new CheckedRunnable() { |
491 |
> |
public void realRun() throws InterruptedException { |
492 |
> |
assertNull(q.poll()); |
493 |
> |
threadsStarted.await(); |
494 |
> |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
495 |
> |
assertTrue(q.isEmpty()); |
496 |
> |
}}); |
497 |
> |
|
498 |
> |
executor.execute(new CheckedRunnable() { |
499 |
> |
public void realRun() throws InterruptedException { |
500 |
> |
threadsStarted.await(); |
501 |
> |
q.put(one); |
502 |
> |
}}); |
503 |
|
|
516 |
– |
executor.execute(new Runnable() { |
517 |
– |
public void run() { |
518 |
– |
try { |
519 |
– |
Thread.sleep(SMALL_DELAY_MS); |
520 |
– |
q.put(new Integer(1)); |
521 |
– |
} |
522 |
– |
catch (InterruptedException e) { |
523 |
– |
threadUnexpectedException(); |
524 |
– |
} |
525 |
– |
} |
526 |
– |
}); |
527 |
– |
|
504 |
|
joinPool(executor); |
505 |
|
} |
506 |
|
|
507 |
|
/** |
508 |
|
* a deserialized serialized queue is usable |
509 |
|
*/ |
510 |
< |
public void testSerialization() { |
510 |
> |
public void testSerialization() throws Exception { |
511 |
> |
SynchronousQueue q = new SynchronousQueue(); |
512 |
> |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
513 |
> |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
514 |
> |
out.writeObject(q); |
515 |
> |
out.close(); |
516 |
> |
|
517 |
> |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
518 |
> |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
519 |
> |
SynchronousQueue r = (SynchronousQueue)in.readObject(); |
520 |
> |
assertEquals(q.size(), r.size()); |
521 |
> |
while (!q.isEmpty()) |
522 |
> |
assertEquals(q.remove(), r.remove()); |
523 |
> |
} |
524 |
> |
|
525 |
> |
/** |
526 |
> |
* drainTo(null) throws NPE |
527 |
> |
*/ |
528 |
> |
public void testDrainToNull() { |
529 |
> |
SynchronousQueue q = new SynchronousQueue(); |
530 |
> |
try { |
531 |
> |
q.drainTo(null); |
532 |
> |
shouldThrow(); |
533 |
> |
} catch (NullPointerException success) {} |
534 |
> |
} |
535 |
> |
|
536 |
> |
/** |
537 |
> |
* drainTo(this) throws IAE |
538 |
> |
*/ |
539 |
> |
public void testDrainToSelf() { |
540 |
|
SynchronousQueue q = new SynchronousQueue(); |
541 |
|
try { |
542 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
543 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
544 |
< |
out.writeObject(q); |
545 |
< |
out.close(); |
546 |
< |
|
547 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
548 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
549 |
< |
SynchronousQueue r = (SynchronousQueue)in.readObject(); |
550 |
< |
assertEquals(q.size(), r.size()); |
551 |
< |
while (!q.isEmpty()) |
552 |
< |
assertEquals(q.remove(), r.remove()); |
553 |
< |
} catch(Exception e){ |
554 |
< |
unexpectedException(); |
542 |
> |
q.drainTo(q); |
543 |
> |
shouldThrow(); |
544 |
> |
} catch (IllegalArgumentException success) {} |
545 |
> |
} |
546 |
> |
|
547 |
> |
/** |
548 |
> |
* drainTo(c) of empty queue doesn't transfer elements |
549 |
> |
*/ |
550 |
> |
public void testDrainTo() { |
551 |
> |
SynchronousQueue q = new SynchronousQueue(); |
552 |
> |
ArrayList l = new ArrayList(); |
553 |
> |
q.drainTo(l); |
554 |
> |
assertEquals(q.size(), 0); |
555 |
> |
assertEquals(l.size(), 0); |
556 |
> |
} |
557 |
> |
|
558 |
> |
/** |
559 |
> |
* drainTo empties queue, unblocking a waiting put. |
560 |
> |
*/ |
561 |
> |
public void testDrainToWithActivePut() throws InterruptedException { |
562 |
> |
final SynchronousQueue q = new SynchronousQueue(); |
563 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
564 |
> |
public void realRun() throws InterruptedException { |
565 |
> |
q.put(one); |
566 |
> |
}}); |
567 |
> |
|
568 |
> |
ArrayList l = new ArrayList(); |
569 |
> |
long startTime = System.nanoTime(); |
570 |
> |
while (l.isEmpty()) { |
571 |
> |
q.drainTo(l); |
572 |
> |
if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
573 |
> |
fail("timed out"); |
574 |
> |
Thread.yield(); |
575 |
|
} |
576 |
+ |
assertTrue(l.size() == 1); |
577 |
+ |
assertSame(one, l.get(0)); |
578 |
+ |
awaitTermination(t); |
579 |
+ |
} |
580 |
+ |
|
581 |
+ |
/** |
582 |
+ |
* drainTo(null, n) throws NPE |
583 |
+ |
*/ |
584 |
+ |
public void testDrainToNullN() { |
585 |
+ |
SynchronousQueue q = new SynchronousQueue(); |
586 |
+ |
try { |
587 |
+ |
q.drainTo(null, 0); |
588 |
+ |
shouldThrow(); |
589 |
+ |
} catch (NullPointerException success) {} |
590 |
+ |
} |
591 |
+ |
|
592 |
+ |
/** |
593 |
+ |
* drainTo(this, n) throws IAE |
594 |
+ |
*/ |
595 |
+ |
public void testDrainToSelfN() { |
596 |
+ |
SynchronousQueue q = new SynchronousQueue(); |
597 |
+ |
try { |
598 |
+ |
q.drainTo(q, 0); |
599 |
+ |
shouldThrow(); |
600 |
+ |
} catch (IllegalArgumentException success) {} |
601 |
+ |
} |
602 |
+ |
|
603 |
+ |
/** |
604 |
+ |
* drainTo(c, n) empties up to n elements of queue into c |
605 |
+ |
*/ |
606 |
+ |
public void testDrainToN() throws InterruptedException { |
607 |
+ |
final SynchronousQueue q = new SynchronousQueue(); |
608 |
+ |
Thread t1 = newStartedThread(new CheckedRunnable() { |
609 |
+ |
public void realRun() throws InterruptedException { |
610 |
+ |
q.put(one); |
611 |
+ |
}}); |
612 |
+ |
|
613 |
+ |
Thread t2 = newStartedThread(new CheckedRunnable() { |
614 |
+ |
public void realRun() throws InterruptedException { |
615 |
+ |
q.put(two); |
616 |
+ |
}}); |
617 |
+ |
|
618 |
+ |
ArrayList l = new ArrayList(); |
619 |
+ |
delay(SHORT_DELAY_MS); |
620 |
+ |
q.drainTo(l, 1); |
621 |
+ |
assertEquals(1, l.size()); |
622 |
+ |
q.drainTo(l, 1); |
623 |
+ |
assertEquals(2, l.size()); |
624 |
+ |
assertTrue(l.contains(one)); |
625 |
+ |
assertTrue(l.contains(two)); |
626 |
+ |
awaitTermination(t1); |
627 |
+ |
awaitTermination(t2); |
628 |
|
} |
629 |
|
|
630 |
|
} |