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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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*/ |
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|
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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.io.*; |
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|
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public class SynchronousQueueTest extends TestCase { |
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|
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private final static int N = 1; |
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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 static void main(String[] args) { |
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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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} |
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|
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public void testEmptyFull() { |
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SynchronousQueue q = new SynchronousQueue(); |
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assertTrue(q.isEmpty()); |
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assertEquals(0, q.size()); |
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assertEquals(0, q.remainingCapacity()); |
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assertFalse(q.offer(new Integer(3))); |
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} |
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|
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public void testOfferNull(){ |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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q.offer(null); |
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fail("should throw NPE"); |
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} catch (NullPointerException success) { } |
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} |
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|
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public void testOffer(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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assertFalse(q.offer(new Integer(1))); |
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} |
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|
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public void testAdd(){ |
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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(new Integer(0)); |
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} catch (IllegalStateException success){ |
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} |
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} |
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|
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public void testAddAll1(){ |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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q.addAll(null); |
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fail("Cannot add null collection"); |
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} |
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catch (NullPointerException success) {} |
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} |
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public void testAddAll2(){ |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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Integer[] ints = new Integer[N]; |
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q.addAll(Arrays.asList(ints)); |
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fail("Cannot add null elements"); |
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} |
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catch (NullPointerException success) {} |
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} |
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public void testAddAll4(){ |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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Integer[] ints = new Integer[N]; |
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for (int i = 0; i < N; ++i) |
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ints[i] = new Integer(i); |
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q.addAll(Arrays.asList(ints)); |
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fail("Cannot add with insufficient capacity"); |
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} |
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catch (IllegalStateException success) {} |
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} |
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|
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public void testPutNull() { |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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q.put(null); |
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fail("put should throw NPE"); |
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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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fail("Unexpected exception"); |
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} |
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} |
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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(new Integer(0)); |
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fail("put should block"); |
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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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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testPutWithTake() { |
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final SynchronousQueue q = new SynchronousQueue(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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int added = 0; |
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try { |
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q.put(new Object()); |
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++added; |
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q.put(new Object()); |
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++added; |
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q.put(new Object()); |
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++added; |
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q.put(new Object()); |
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++added; |
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fail("Should block"); |
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} catch (InterruptedException e){ |
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assertTrue(added >= 1); |
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} |
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} |
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}); |
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try { |
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t.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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q.take(); |
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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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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testTimedOffer() { |
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final SynchronousQueue q = new SynchronousQueue(); |
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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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|
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assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS)); |
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q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS); |
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fail("Should block"); |
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} catch (InterruptedException success){} |
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} |
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}); |
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|
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try { |
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t.start(); |
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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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fail("Unexpected exception"); |
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} |
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} |
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|
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|
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public void testTakeFromEmpty() { |
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final SynchronousQueue q = new SynchronousQueue(); |
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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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q.take(); |
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fail("Should block"); |
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} catch (InterruptedException success){ } |
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} |
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}); |
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try { |
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t.start(); |
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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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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testPoll(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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assertNull(q.poll()); |
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} |
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|
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public void testTimedPoll0() { |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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assertNull(q.poll(0, TimeUnit.MILLISECONDS)); |
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} catch (InterruptedException e){ |
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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testTimedPoll() { |
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try { |
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SynchronousQueue q = new SynchronousQueue(); |
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assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
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} catch (InterruptedException e){ |
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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testInterruptedTimedPoll(){ |
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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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assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
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} catch (InterruptedException success){ |
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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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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testTimedPollWithOffer(){ |
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final SynchronousQueue q = new SynchronousQueue(); |
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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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assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
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q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS); |
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q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS); |
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fail("Should block"); |
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} catch (InterruptedException success) { } |
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} |
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}); |
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try { |
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t.start(); |
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Thread.sleep(SHORT_DELAY_MS * 2); |
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assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
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t.interrupt(); |
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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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} |
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|
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|
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public void testPeek(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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assertNull(q.peek()); |
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} |
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|
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public void testElement(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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try { |
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q.element(); |
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fail("no such element"); |
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} |
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catch (NoSuchElementException success) {} |
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} |
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|
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public void testRemove(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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try { |
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q.remove(); |
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fail("remove should throw"); |
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} catch (NoSuchElementException success){ |
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} |
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} |
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|
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public void testRemoveElement(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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for (int i = 1; i < N; i+=2) { |
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assertFalse(q.remove(new Integer(i))); |
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} |
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assertTrue(q.isEmpty()); |
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} |
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|
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public void testContains(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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for (int i = 0; i < N; ++i) { |
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assertFalse(q.contains(new Integer(i))); |
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} |
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} |
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|
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public void testClear(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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q.clear(); |
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assertTrue(q.isEmpty()); |
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} |
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|
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public void testContainsAll(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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Integer[] empty = new Integer[0]; |
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Integer[] ints = new Integer[1]; ints[0] = new Integer(0); |
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// assertTrue(q.containsAll(Arrays.asList(empty))); |
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assertFalse(q.containsAll(Arrays.asList(ints))); |
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} |
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|
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public void testRetainAll(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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Integer[] empty = new Integer[0]; |
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Integer[] ints = new Integer[1]; ints[0] = new Integer(0); |
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q.retainAll(Arrays.asList(ints)); |
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// assertTrue(q.containsAll(Arrays.asList(empty))); |
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assertFalse(q.containsAll(Arrays.asList(ints))); |
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} |
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|
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public void testRemoveAll(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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Integer[] empty = new Integer[0]; |
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Integer[] ints = new Integer[1]; ints[0] = new Integer(0); |
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q.removeAll(Arrays.asList(ints)); |
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// assertTrue(q.containsAll(Arrays.asList(empty))); |
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assertFalse(q.containsAll(Arrays.asList(ints))); |
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} |
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|
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|
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public void testToArray(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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Object[] o = q.toArray(); |
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assertEquals(o.length, 0); |
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} |
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|
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public void testToArray2(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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Integer[] ints = new Integer[1]; |
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assertNull(ints[0]); |
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} |
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|
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public void testIterator(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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Iterator it = q.iterator(); |
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assertFalse(it.hasNext()); |
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try { |
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Object x = it.next(); |
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fail("should throw"); |
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} |
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catch (NoSuchElementException success) {} |
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} |
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|
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public void testIteratorRemove(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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Iterator it = q.iterator(); |
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try { |
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it.remove(); |
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fail("should throw"); |
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} |
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catch (IllegalStateException success) {} |
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} |
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|
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public void testToString(){ |
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SynchronousQueue q = new SynchronousQueue(); |
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String s = q.toString(); |
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assertTrue(s != null); |
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} |
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|
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|
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public void testOfferInExecutor() { |
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final SynchronousQueue q = new SynchronousQueue(); |
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ExecutorService executor = Executors.newFixedThreadPool(2); |
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final Integer one = new Integer(1); |
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|
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executor.execute(new Runnable() { |
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public void run() { |
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assertFalse(q.offer(one)); |
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try { |
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assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS)); |
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assertEquals(0, q.remainingCapacity()); |
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} |
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catch (InterruptedException e) { |
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fail("should not be interrupted"); |
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} |
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} |
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}); |
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|
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executor.execute(new Runnable() { |
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public void run() { |
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try { |
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Thread.sleep(MEDIUM_DELAY_MS); |
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assertEquals(one, q.take()); |
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} |
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catch (InterruptedException e) { |
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fail("should not be interrupted"); |
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} |
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} |
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}); |
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|
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executor.shutdown(); |
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|
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} |
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|
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public void testPollInExecutor() { |
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|
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final SynchronousQueue q = new SynchronousQueue(); |
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|
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ExecutorService executor = Executors.newFixedThreadPool(2); |
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|
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executor.execute(new Runnable() { |
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public void run() { |
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assertNull(q.poll()); |
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try { |
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assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS)); |
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assertTrue(q.isEmpty()); |
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} |
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catch (InterruptedException e) { |
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fail("should not be interrupted"); |
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} |
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} |
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}); |
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|
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executor.execute(new Runnable() { |
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public void run() { |
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try { |
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Thread.sleep(MEDIUM_DELAY_MS); |
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q.put(new Integer(1)); |
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} |
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catch (InterruptedException e) { |
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fail("should not be interrupted"); |
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} |
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} |
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}); |
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|
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executor.shutdown(); |
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|
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} |
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|
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public void testSerialization() { |
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SynchronousQueue q = new SynchronousQueue(); |
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try { |
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ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
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ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
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out.writeObject(q); |
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out.close(); |
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|
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ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
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ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
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SynchronousQueue r = (SynchronousQueue)in.readObject(); |
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assertEquals(q.size(), r.size()); |
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while (!q.isEmpty()) |
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assertEquals(q.remove(), r.remove()); |
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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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} |