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/* |
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* Written by Doug Lea and Martin Buchholz with assistance from |
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* members of JCP JSR-166 Expert Group and released to the public |
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* domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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|
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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|
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import java.util.concurrent.Executor; |
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import java.util.concurrent.Executors; |
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import java.util.concurrent.Flow; |
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import static java.util.concurrent.Flow.Publisher; |
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import static java.util.concurrent.Flow.Subscriber; |
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import static java.util.concurrent.Flow.Subscription; |
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import java.util.concurrent.LinkedBlockingQueue; |
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import java.util.concurrent.ForkJoinPool; |
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import java.util.concurrent.SubmissionPublisher; |
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import java.util.concurrent.ThreadFactory; |
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import java.util.concurrent.ThreadPoolExecutor; |
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import java.util.concurrent.TimeUnit; |
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import java.util.concurrent.atomic.AtomicInteger; |
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import java.util.function.BiConsumer; |
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import java.util.function.BiPredicate; |
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import java.util.function.BiFunction; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class SubmissionPublisherTest extends JSR166TestCase { |
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|
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(SubmissionPublisherTest.class); |
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} |
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|
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// Factory for single thread pool in case commonPool parallelism is zero |
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static final class DaemonThreadFactory implements ThreadFactory { |
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public Thread newThread(Runnable r) { |
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Thread t = new Thread(r); |
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t.setDaemon(true); |
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return t; |
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} |
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} |
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|
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static final Executor basicExecutor = |
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(ForkJoinPool.getCommonPoolParallelism() > 0) ? |
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ForkJoinPool.commonPool() : |
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new ThreadPoolExecutor(1, 1, 60, SECONDS, |
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new LinkedBlockingQueue<Runnable>(), |
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new DaemonThreadFactory()); |
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|
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static SubmissionPublisher<Integer> basicPublisher() { |
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return new SubmissionPublisher<Integer>(basicExecutor, |
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Flow.defaultBufferSize()); |
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} |
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|
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static class SPException extends RuntimeException {} |
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|
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class TestSubscriber implements Subscriber<Integer> { |
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volatile Subscription sn; |
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int last; // Requires that onNexts are in numeric order |
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volatile int nexts; |
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volatile int errors; |
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volatile int completes; |
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volatile boolean throwOnCall = false; |
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volatile boolean request = true; |
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volatile Throwable lastError; |
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|
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public synchronized void onSubscribe(Subscription s) { |
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threadAssertTrue(sn == null); |
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sn = s; |
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notifyAll(); |
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if (throwOnCall) |
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throw new SPException(); |
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if (request) |
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sn.request(1L); |
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} |
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public synchronized void onNext(Integer t) { |
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++nexts; |
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notifyAll(); |
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int current = t.intValue(); |
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threadAssertTrue(current >= last); |
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last = current; |
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if (request) |
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sn.request(1L); |
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if (throwOnCall) |
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throw new SPException(); |
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} |
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public synchronized void onError(Throwable t) { |
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threadAssertTrue(completes == 0); |
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threadAssertTrue(errors == 0); |
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lastError = t; |
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++errors; |
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notifyAll(); |
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} |
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public synchronized void onComplete() { |
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threadAssertTrue(completes == 0); |
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++completes; |
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notifyAll(); |
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} |
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|
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synchronized void awaitSubscribe() { |
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while (sn == null) { |
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try { |
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wait(); |
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} catch (Exception ex) { |
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threadUnexpectedException(ex); |
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break; |
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} |
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} |
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} |
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synchronized void awaitNext(int n) { |
117 |
while (nexts < n) { |
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try { |
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wait(); |
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} catch (Exception ex) { |
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threadUnexpectedException(ex); |
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break; |
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} |
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} |
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} |
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synchronized void awaitComplete() { |
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while (completes == 0 && errors == 0) { |
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try { |
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wait(); |
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} catch (Exception ex) { |
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threadUnexpectedException(ex); |
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break; |
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} |
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} |
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} |
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synchronized void awaitError() { |
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while (errors == 0) { |
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try { |
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wait(); |
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} catch (Exception ex) { |
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threadUnexpectedException(ex); |
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break; |
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} |
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} |
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} |
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|
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} |
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|
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/** |
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* A new SubmissionPublisher has no subscribers, a non-null |
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* executor, a power-of-two capacity, is not closed, and reports |
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* zero demand and lag |
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*/ |
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void checkInitialState(SubmissionPublisher<?> p) { |
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assertFalse(p.hasSubscribers()); |
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assertEquals(p.getNumberOfSubscribers(), 0); |
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assertTrue(p.getSubscribers().isEmpty()); |
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assertFalse(p.isClosed()); |
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assertNull(p.getClosedException()); |
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int n = p.getMaxBufferCapacity(); |
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assertTrue((n & (n - 1)) == 0); // power of two |
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assertNotNull(p.getExecutor()); |
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assertEquals(p.estimateMinimumDemand(), 0); |
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assertEquals(p.estimateMaximumLag(), 0); |
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} |
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|
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/** |
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* A default-constructed SubmissionPublisher has no subscribers, |
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* is not closed, has default buffer size, and uses the |
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* ForkJoinPool.commonPool executor |
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*/ |
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public void testConstructor1() { |
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SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>(); |
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checkInitialState(p); |
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assertSame(p.getExecutor(), ForkJoinPool.commonPool()); |
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assertEquals(p.getMaxBufferCapacity(), Flow.defaultBufferSize()); |
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} |
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|
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/** |
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* A new SubmissionPublisher has no subscribers, is not closed, |
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* has the given buffer size, and uses the given executor |
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*/ |
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public void testConstructor2() { |
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Executor e = Executors.newFixedThreadPool(1); |
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SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>(e, 8); |
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checkInitialState(p); |
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assertSame(p.getExecutor(), e); |
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assertEquals(p.getMaxBufferCapacity(), 8); |
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} |
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|
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/** |
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* A null Executor argument to SubmissionPublisher constructor throws NPE |
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*/ |
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public void testConstructor3() { |
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try { |
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new SubmissionPublisher<Integer>(null, 8); |
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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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* A negative capacity argument to SubmissionPublisher constructor |
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* throws IAE |
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*/ |
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public void testConstructor4() { |
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Executor e = Executors.newFixedThreadPool(1); |
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try { |
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new SubmissionPublisher<Integer>(e, -1); |
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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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* A closed publisher reports isClosed with no closedException and |
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* throws ISE upon attempted submission; a subsequent close or |
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* closeExceptionally has no additional effect. |
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*/ |
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public void testClose() { |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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checkInitialState(p); |
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p.close(); |
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assertTrue(p.isClosed()); |
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assertNull(p.getClosedException()); |
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try { |
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p.submit(1); |
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shouldThrow(); |
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} catch (IllegalStateException success) {} |
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Throwable ex = new SPException(); |
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p.closeExceptionally(ex); |
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assertTrue(p.isClosed()); |
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assertNull(p.getClosedException()); |
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} |
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|
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/** |
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* A publisher closedExceptionally reports isClosed with the |
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* closedException and throws ISE upon attempted submission; a |
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* subsequent close or closeExceptionally has no additional |
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* effect. |
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*/ |
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public void testCloseExceptionally() { |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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checkInitialState(p); |
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Throwable ex = new SPException(); |
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p.closeExceptionally(ex); |
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assertTrue(p.isClosed()); |
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assertSame(p.getClosedException(), ex); |
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try { |
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p.submit(1); |
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shouldThrow(); |
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} catch (IllegalStateException success) {} |
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p.close(); |
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assertTrue(p.isClosed()); |
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assertSame(p.getClosedException(), ex); |
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} |
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|
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/** |
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* Upon subscription, the subscriber's onSubscribe is called, no |
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* other Subscriber methods are invoked, the publisher |
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* hasSubscribers, isSubscribed is true, and existing |
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* subscriptions are unaffected. |
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*/ |
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public void testSubscribe1() { |
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TestSubscriber s = new TestSubscriber(); |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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p.subscribe(s); |
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assertTrue(p.hasSubscribers()); |
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assertEquals(p.getNumberOfSubscribers(), 1); |
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assertTrue(p.getSubscribers().contains(s)); |
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assertTrue(p.isSubscribed(s)); |
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s.awaitSubscribe(); |
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assertNotNull(s.sn); |
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assertEquals(s.nexts, 0); |
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assertEquals(s.errors, 0); |
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assertEquals(s.completes, 0); |
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TestSubscriber s2 = new TestSubscriber(); |
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p.subscribe(s2); |
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assertTrue(p.hasSubscribers()); |
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assertEquals(p.getNumberOfSubscribers(), 2); |
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assertTrue(p.getSubscribers().contains(s)); |
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assertTrue(p.getSubscribers().contains(s2)); |
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assertTrue(p.isSubscribed(s)); |
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assertTrue(p.isSubscribed(s2)); |
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s2.awaitSubscribe(); |
284 |
assertNotNull(s2.sn); |
285 |
assertEquals(s2.nexts, 0); |
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assertEquals(s2.errors, 0); |
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assertEquals(s2.completes, 0); |
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} |
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|
290 |
/** |
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* If closed, upon subscription, the subscriber's onComplete |
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* method is invoked |
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*/ |
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public void testSubscribe2() { |
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TestSubscriber s = new TestSubscriber(); |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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p.close(); |
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p.subscribe(s); |
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s.awaitComplete(); |
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assertEquals(s.nexts, 0); |
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assertEquals(s.errors, 0); |
302 |
assertEquals(s.completes, 1); |
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} |
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|
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/** |
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* If closedExceptionally, upon subscription, the subscriber's |
307 |
* onError method is invoked |
308 |
*/ |
309 |
public void testSubscribe3() { |
310 |
TestSubscriber s = new TestSubscriber(); |
311 |
SubmissionPublisher<Integer> p = basicPublisher(); |
312 |
Throwable ex = new SPException(); |
313 |
p.closeExceptionally(ex); |
314 |
assertTrue(p.isClosed()); |
315 |
assertSame(p.getClosedException(), ex); |
316 |
p.subscribe(s); |
317 |
s.awaitError(); |
318 |
assertEquals(s.nexts, 0); |
319 |
assertEquals(s.errors, 1); |
320 |
} |
321 |
|
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/** |
323 |
* Upon attempted resubscription, the subscriber's onError is |
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* called and the subscription is cancelled. |
325 |
*/ |
326 |
public void testSubscribe4() { |
327 |
TestSubscriber s = new TestSubscriber(); |
328 |
SubmissionPublisher<Integer> p = basicPublisher(); |
329 |
p.subscribe(s); |
330 |
assertTrue(p.hasSubscribers()); |
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assertEquals(p.getNumberOfSubscribers(), 1); |
332 |
assertTrue(p.getSubscribers().contains(s)); |
333 |
assertTrue(p.isSubscribed(s)); |
334 |
s.awaitSubscribe(); |
335 |
assertNotNull(s.sn); |
336 |
assertEquals(s.nexts, 0); |
337 |
assertEquals(s.errors, 0); |
338 |
assertEquals(s.completes, 0); |
339 |
p.subscribe(s); |
340 |
s.awaitError(); |
341 |
assertEquals(s.nexts, 0); |
342 |
assertEquals(s.errors, 1); |
343 |
assertFalse(p.isSubscribed(s)); |
344 |
} |
345 |
|
346 |
/** |
347 |
* An exception thrown in onSubscribe causes onError |
348 |
*/ |
349 |
public void testSubscribe5() { |
350 |
TestSubscriber s = new TestSubscriber(); |
351 |
SubmissionPublisher<Integer> p = basicPublisher(); |
352 |
s.throwOnCall = true; |
353 |
try { |
354 |
p.subscribe(s); |
355 |
} catch (Exception ok) {} |
356 |
s.awaitError(); |
357 |
assertEquals(s.nexts, 0); |
358 |
assertEquals(s.errors, 1); |
359 |
assertEquals(s.completes, 0); |
360 |
} |
361 |
|
362 |
/** |
363 |
* subscribe(null) thows NPE |
364 |
*/ |
365 |
public void testSubscribe6() { |
366 |
SubmissionPublisher<Integer> p = basicPublisher(); |
367 |
try { |
368 |
p.subscribe(null); |
369 |
shouldThrow(); |
370 |
} catch (NullPointerException success) {} |
371 |
checkInitialState(p); |
372 |
} |
373 |
|
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/** |
375 |
* Closing a publisher causes onComplete to subscribers |
376 |
*/ |
377 |
public void testCloseCompletes() { |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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TestSubscriber s1 = new TestSubscriber(); |
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TestSubscriber s2 = new TestSubscriber(); |
381 |
p.subscribe(s1); |
382 |
p.subscribe(s2); |
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p.submit(1); |
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p.close(); |
385 |
assertTrue(p.isClosed()); |
386 |
assertNull(p.getClosedException()); |
387 |
s1.awaitComplete(); |
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assertEquals(s1.nexts, 1); |
389 |
assertEquals(s1.completes, 1); |
390 |
s2.awaitComplete(); |
391 |
assertEquals(s2.nexts, 1); |
392 |
assertEquals(s2.completes, 1); |
393 |
} |
394 |
|
395 |
/** |
396 |
* Closing a publisher exceptionally causes onError to subscribers |
397 |
*/ |
398 |
public void testCloseExceptionallyError() { |
399 |
SubmissionPublisher<Integer> p = basicPublisher(); |
400 |
TestSubscriber s1 = new TestSubscriber(); |
401 |
TestSubscriber s2 = new TestSubscriber(); |
402 |
p.subscribe(s1); |
403 |
p.subscribe(s2); |
404 |
p.submit(1); |
405 |
p.closeExceptionally(new SPException()); |
406 |
assertTrue(p.isClosed()); |
407 |
s1.awaitError(); |
408 |
assertTrue(s1.nexts <= 1); |
409 |
assertEquals(s1.errors, 1); |
410 |
s2.awaitError(); |
411 |
assertTrue(s2.nexts <= 1); |
412 |
assertEquals(s2.errors, 1); |
413 |
} |
414 |
|
415 |
/** |
416 |
* Cancelling a subscription eventually causes no more onNexts to be issued |
417 |
*/ |
418 |
public void testCancel() { |
419 |
SubmissionPublisher<Integer> p = basicPublisher(); |
420 |
TestSubscriber s1 = new TestSubscriber(); |
421 |
TestSubscriber s2 = new TestSubscriber(); |
422 |
p.subscribe(s1); |
423 |
p.subscribe(s2); |
424 |
s1.awaitSubscribe(); |
425 |
p.submit(1); |
426 |
s1.sn.cancel(); |
427 |
for (int i = 2; i <= 20; ++i) |
428 |
p.submit(i); |
429 |
p.close(); |
430 |
s2.awaitComplete(); |
431 |
assertEquals(s2.nexts, 20); |
432 |
assertEquals(s2.completes, 1); |
433 |
assertTrue(s1.nexts < 20); |
434 |
assertFalse(p.isSubscribed(s1)); |
435 |
} |
436 |
|
437 |
/** |
438 |
* Throwing an exception in onNext causes onError |
439 |
*/ |
440 |
public void testThrowOnNext() { |
441 |
SubmissionPublisher<Integer> p = basicPublisher(); |
442 |
TestSubscriber s1 = new TestSubscriber(); |
443 |
TestSubscriber s2 = new TestSubscriber(); |
444 |
p.subscribe(s1); |
445 |
p.subscribe(s2); |
446 |
s1.awaitSubscribe(); |
447 |
p.submit(1); |
448 |
s1.throwOnCall = true; |
449 |
p.submit(2); |
450 |
p.close(); |
451 |
s2.awaitComplete(); |
452 |
assertEquals(s2.nexts, 2); |
453 |
s1.awaitComplete(); |
454 |
assertEquals(s1.errors, 1); |
455 |
} |
456 |
|
457 |
/** |
458 |
* If a handler is supplied in conctructor, it is invoked when |
459 |
* subscriber throws an exception in onNext |
460 |
*/ |
461 |
public void testThrowOnNextHandler() { |
462 |
AtomicInteger calls = new AtomicInteger(); |
463 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer> |
464 |
(basicExecutor, 8, |
465 |
(s, e) -> calls.getAndIncrement()); |
466 |
TestSubscriber s1 = new TestSubscriber(); |
467 |
TestSubscriber s2 = new TestSubscriber(); |
468 |
p.subscribe(s1); |
469 |
p.subscribe(s2); |
470 |
s1.awaitSubscribe(); |
471 |
p.submit(1); |
472 |
s1.throwOnCall = true; |
473 |
p.submit(2); |
474 |
p.close(); |
475 |
s2.awaitComplete(); |
476 |
assertEquals(s2.nexts, 2); |
477 |
assertEquals(s2.completes, 1); |
478 |
s1.awaitError(); |
479 |
assertEquals(s1.errors, 1); |
480 |
assertEquals(calls.get(), 1); |
481 |
} |
482 |
|
483 |
/** |
484 |
* onNext items are issued in the same order to each subscriber |
485 |
*/ |
486 |
public void testOrder() { |
487 |
SubmissionPublisher<Integer> p = basicPublisher(); |
488 |
TestSubscriber s1 = new TestSubscriber(); |
489 |
TestSubscriber s2 = new TestSubscriber(); |
490 |
p.subscribe(s1); |
491 |
p.subscribe(s2); |
492 |
for (int i = 1; i <= 20; ++i) |
493 |
p.submit(i); |
494 |
p.close(); |
495 |
s2.awaitComplete(); |
496 |
s1.awaitComplete(); |
497 |
assertEquals(s2.nexts, 20); |
498 |
assertEquals(s2.completes, 1); |
499 |
assertEquals(s1.nexts, 20); |
500 |
assertEquals(s1.completes, 1); |
501 |
} |
502 |
|
503 |
/** |
504 |
* onNext is issued only if requested |
505 |
*/ |
506 |
public void testRequest1() { |
507 |
SubmissionPublisher<Integer> p = basicPublisher(); |
508 |
TestSubscriber s1 = new TestSubscriber(); |
509 |
s1.request = false; |
510 |
p.subscribe(s1); |
511 |
s1.awaitSubscribe(); |
512 |
assertTrue(p.estimateMinimumDemand() == 0); |
513 |
TestSubscriber s2 = new TestSubscriber(); |
514 |
p.subscribe(s2); |
515 |
p.submit(1); |
516 |
p.submit(2); |
517 |
s2.awaitNext(1); |
518 |
assertEquals(s1.nexts, 0); |
519 |
s1.sn.request(3); |
520 |
p.submit(3); |
521 |
p.close(); |
522 |
s2.awaitComplete(); |
523 |
assertEquals(s2.nexts, 3); |
524 |
assertEquals(s2.completes, 1); |
525 |
s1.awaitComplete(); |
526 |
assertTrue(s1.nexts > 0); |
527 |
assertEquals(s1.completes, 1); |
528 |
} |
529 |
|
530 |
/** |
531 |
* onNext is not issued when requests become zero |
532 |
*/ |
533 |
public void testRequest2() { |
534 |
SubmissionPublisher<Integer> p = basicPublisher(); |
535 |
TestSubscriber s1 = new TestSubscriber(); |
536 |
TestSubscriber s2 = new TestSubscriber(); |
537 |
p.subscribe(s1); |
538 |
p.subscribe(s2); |
539 |
s2.awaitSubscribe(); |
540 |
s1.awaitSubscribe(); |
541 |
s1.request = false; |
542 |
p.submit(1); |
543 |
p.submit(2); |
544 |
p.close(); |
545 |
s2.awaitComplete(); |
546 |
assertEquals(s2.nexts, 2); |
547 |
assertEquals(s2.completes, 1); |
548 |
s1.awaitNext(1); |
549 |
assertEquals(s1.nexts, 1); |
550 |
} |
551 |
|
552 |
/** |
553 |
* Negative request causes error |
554 |
*/ |
555 |
public void testRequest3() { |
556 |
SubmissionPublisher<Integer> p = basicPublisher(); |
557 |
TestSubscriber s1 = new TestSubscriber(); |
558 |
TestSubscriber s2 = new TestSubscriber(); |
559 |
p.subscribe(s1); |
560 |
p.subscribe(s2); |
561 |
s2.awaitSubscribe(); |
562 |
s1.awaitSubscribe(); |
563 |
s1.sn.request(-1L); |
564 |
p.submit(1); |
565 |
p.submit(2); |
566 |
p.close(); |
567 |
s2.awaitComplete(); |
568 |
assertEquals(s2.nexts, 2); |
569 |
assertEquals(s2.completes, 1); |
570 |
s1.awaitError(); |
571 |
assertEquals(s1.errors, 1); |
572 |
assertTrue(s1.lastError instanceof IllegalArgumentException); |
573 |
} |
574 |
|
575 |
/** |
576 |
* estimateMinimumDemand reports 0 until request, nonzero after |
577 |
* request, and zero again after delivery |
578 |
*/ |
579 |
public void testEstimateMinimumDemand() { |
580 |
TestSubscriber s = new TestSubscriber(); |
581 |
SubmissionPublisher<Integer> p = basicPublisher(); |
582 |
s.request = false; |
583 |
p.subscribe(s); |
584 |
s.awaitSubscribe(); |
585 |
assertEquals(p.estimateMinimumDemand(), 0); |
586 |
s.sn.request(1); |
587 |
assertEquals(p.estimateMinimumDemand(), 1); |
588 |
p.submit(1); |
589 |
s.awaitNext(1); |
590 |
assertEquals(p.estimateMinimumDemand(), 0); |
591 |
} |
592 |
|
593 |
/** |
594 |
* submit to a publisher with no subscribers returns lag 0 |
595 |
*/ |
596 |
public void testEmptySubmit() { |
597 |
SubmissionPublisher<Integer> p = basicPublisher(); |
598 |
assertEquals(p.submit(1), 0); |
599 |
} |
600 |
|
601 |
/** |
602 |
* submit(null) throws NPE |
603 |
*/ |
604 |
public void testNullSubmit() { |
605 |
SubmissionPublisher<Integer> p = basicPublisher(); |
606 |
try { |
607 |
p.submit(null); |
608 |
shouldThrow(); |
609 |
} catch (NullPointerException success) {} |
610 |
} |
611 |
|
612 |
/** |
613 |
* submit returns number of lagged items, compatible with result |
614 |
* of estimateMaximumLag. |
615 |
*/ |
616 |
public void testLaggedSubmit() { |
617 |
SubmissionPublisher<Integer> p = basicPublisher(); |
618 |
TestSubscriber s1 = new TestSubscriber(); |
619 |
s1.request = false; |
620 |
TestSubscriber s2 = new TestSubscriber(); |
621 |
s2.request = false; |
622 |
p.subscribe(s1); |
623 |
p.subscribe(s2); |
624 |
s2.awaitSubscribe(); |
625 |
s1.awaitSubscribe(); |
626 |
assertEquals(p.submit(1), 1); |
627 |
assertTrue(p.estimateMaximumLag() >= 1); |
628 |
assertTrue(p.submit(2) >= 2); |
629 |
assertTrue(p.estimateMaximumLag() >= 2); |
630 |
s1.sn.request(4); |
631 |
assertTrue(p.submit(3) >= 3); |
632 |
assertTrue(p.estimateMaximumLag() >= 3); |
633 |
s2.sn.request(4); |
634 |
p.submit(4); |
635 |
p.close(); |
636 |
s2.awaitComplete(); |
637 |
assertEquals(s2.nexts, 4); |
638 |
s1.awaitComplete(); |
639 |
assertEquals(s2.nexts, 4); |
640 |
} |
641 |
|
642 |
/** |
643 |
* submit eventually issues requested items when buffer capacity is 1 |
644 |
*/ |
645 |
public void testCap1Submit() { |
646 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
647 |
basicExecutor, 1); |
648 |
TestSubscriber s1 = new TestSubscriber(); |
649 |
TestSubscriber s2 = new TestSubscriber(); |
650 |
p.subscribe(s1); |
651 |
p.subscribe(s2); |
652 |
for (int i = 1; i <= 20; ++i) { |
653 |
assertTrue(p.estimateMinimumDemand() <= 1); |
654 |
assertTrue(p.submit(i) >= 0); |
655 |
} |
656 |
p.close(); |
657 |
s2.awaitComplete(); |
658 |
s1.awaitComplete(); |
659 |
assertEquals(s2.nexts, 20); |
660 |
assertEquals(s2.completes, 1); |
661 |
assertEquals(s1.nexts, 20); |
662 |
assertEquals(s1.completes, 1); |
663 |
} |
664 |
|
665 |
static boolean noopHandle(AtomicInteger count) { |
666 |
count.getAndIncrement(); |
667 |
return false; |
668 |
} |
669 |
|
670 |
static boolean reqHandle(AtomicInteger count, Subscriber s) { |
671 |
count.getAndIncrement(); |
672 |
((TestSubscriber)s).sn.request(Long.MAX_VALUE); |
673 |
return true; |
674 |
} |
675 |
|
676 |
/** |
677 |
* offer to a publisher with no subscribers returns lag 0 |
678 |
*/ |
679 |
public void testEmptyOffer() { |
680 |
SubmissionPublisher<Integer> p = basicPublisher(); |
681 |
assertEquals(0, p.offer(1, null)); |
682 |
} |
683 |
|
684 |
/** |
685 |
* offer(null) throws NPE |
686 |
*/ |
687 |
public void testNullOffer() { |
688 |
SubmissionPublisher<Integer> p = basicPublisher(); |
689 |
try { |
690 |
p.offer(null, null); |
691 |
shouldThrow(); |
692 |
} catch (NullPointerException success) {} |
693 |
} |
694 |
|
695 |
/** |
696 |
* offer returns number of lagged items if not saturated |
697 |
*/ |
698 |
public void testLaggedOffer() { |
699 |
SubmissionPublisher<Integer> p = basicPublisher(); |
700 |
TestSubscriber s1 = new TestSubscriber(); |
701 |
s1.request = false; |
702 |
TestSubscriber s2 = new TestSubscriber(); |
703 |
s2.request = false; |
704 |
p.subscribe(s1); |
705 |
p.subscribe(s2); |
706 |
s2.awaitSubscribe(); |
707 |
s1.awaitSubscribe(); |
708 |
assertTrue(p.offer(1, null) >= 1); |
709 |
assertTrue(p.offer(2, null) >= 2); |
710 |
s1.sn.request(4); |
711 |
assertTrue(p.offer(3, null) >= 3); |
712 |
s2.sn.request(4); |
713 |
p.offer(4, null); |
714 |
p.close(); |
715 |
s2.awaitComplete(); |
716 |
assertEquals(s2.nexts, 4); |
717 |
s1.awaitComplete(); |
718 |
assertEquals(s2.nexts, 4); |
719 |
} |
720 |
|
721 |
/** |
722 |
* offer reports drops if saturated |
723 |
*/ |
724 |
public void testDroppedOffer() { |
725 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
726 |
basicExecutor, 4); |
727 |
TestSubscriber s1 = new TestSubscriber(); |
728 |
s1.request = false; |
729 |
TestSubscriber s2 = new TestSubscriber(); |
730 |
s2.request = false; |
731 |
p.subscribe(s1); |
732 |
p.subscribe(s2); |
733 |
s2.awaitSubscribe(); |
734 |
s1.awaitSubscribe(); |
735 |
for (int i = 1; i <= 4; ++i) |
736 |
assertTrue(p.offer(i, null) >= 0); |
737 |
p.offer(5, null); |
738 |
assertTrue(p.offer(6, null) < 0); |
739 |
s1.sn.request(64); |
740 |
assertTrue(p.offer(7, null) < 0); |
741 |
s2.sn.request(64); |
742 |
p.close(); |
743 |
s2.awaitComplete(); |
744 |
assertTrue(s2.nexts >= 4); |
745 |
s1.awaitComplete(); |
746 |
assertTrue(s1.nexts >= 4); |
747 |
} |
748 |
|
749 |
/** |
750 |
* offer invokes drop handler if saturated |
751 |
*/ |
752 |
public void testHandledDroppedOffer() { |
753 |
AtomicInteger calls = new AtomicInteger(); |
754 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
755 |
basicExecutor, 4); |
756 |
TestSubscriber s1 = new TestSubscriber(); |
757 |
s1.request = false; |
758 |
TestSubscriber s2 = new TestSubscriber(); |
759 |
s2.request = false; |
760 |
p.subscribe(s1); |
761 |
p.subscribe(s2); |
762 |
s2.awaitSubscribe(); |
763 |
s1.awaitSubscribe(); |
764 |
for (int i = 1; i <= 4; ++i) |
765 |
assertTrue(p.offer(i, (s, x) -> noopHandle(calls)) >= 0); |
766 |
p.offer(4, (s, x) -> noopHandle(calls)); |
767 |
assertTrue(p.offer(6, (s, x) -> noopHandle(calls)) < 0); |
768 |
s1.sn.request(64); |
769 |
assertTrue(p.offer(7, (s, x) -> noopHandle(calls)) < 0); |
770 |
s2.sn.request(64); |
771 |
p.close(); |
772 |
s2.awaitComplete(); |
773 |
s1.awaitComplete(); |
774 |
assertTrue(calls.get() >= 4); |
775 |
} |
776 |
|
777 |
|
778 |
/** |
779 |
* offer succeeds if drop handler forces request |
780 |
*/ |
781 |
public void testRecoveredHandledDroppedOffer() { |
782 |
AtomicInteger calls = new AtomicInteger(); |
783 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
784 |
basicExecutor, 4); |
785 |
TestSubscriber s1 = new TestSubscriber(); |
786 |
s1.request = false; |
787 |
TestSubscriber s2 = new TestSubscriber(); |
788 |
s2.request = false; |
789 |
p.subscribe(s1); |
790 |
p.subscribe(s2); |
791 |
s2.awaitSubscribe(); |
792 |
s1.awaitSubscribe(); |
793 |
int n = 0; |
794 |
for (int i = 1; i <= 8; ++i) { |
795 |
int d = p.offer(i, (s, x) -> reqHandle(calls, s)); |
796 |
n = n + 2 + (d < 0 ? d : 0); |
797 |
} |
798 |
p.close(); |
799 |
s2.awaitComplete(); |
800 |
s1.awaitComplete(); |
801 |
assertEquals(s1.nexts + s2.nexts, n); |
802 |
assertTrue(calls.get() >= 2); |
803 |
} |
804 |
|
805 |
|
806 |
/** |
807 |
* Timed offer to a publisher with no subscribers returns lag 0 |
808 |
*/ |
809 |
public void testEmptyTimedOffer() { |
810 |
SubmissionPublisher<Integer> p = basicPublisher(); |
811 |
assertEquals(0, p.offer(1, LONG_DELAY_MS, MILLISECONDS, null)); |
812 |
} |
813 |
|
814 |
/** |
815 |
* Timed offer with null item or TimeUnit throws NPE |
816 |
*/ |
817 |
public void testNullTimedOffer() { |
818 |
SubmissionPublisher<Integer> p = basicPublisher(); |
819 |
try { |
820 |
p.offer(null, SHORT_DELAY_MS, MILLISECONDS, null); |
821 |
shouldThrow(); |
822 |
} catch (NullPointerException success) {} |
823 |
try { |
824 |
p.offer(1, SHORT_DELAY_MS, null, null); |
825 |
shouldThrow(); |
826 |
} catch (NullPointerException success) {} |
827 |
} |
828 |
|
829 |
/** |
830 |
* Timed offer returns number of lagged items if not saturated |
831 |
*/ |
832 |
public void testLaggedTimedOffer() { |
833 |
SubmissionPublisher<Integer> p = basicPublisher(); |
834 |
TestSubscriber s1 = new TestSubscriber(); |
835 |
s1.request = false; |
836 |
TestSubscriber s2 = new TestSubscriber(); |
837 |
s2.request = false; |
838 |
p.subscribe(s1); |
839 |
p.subscribe(s2); |
840 |
s2.awaitSubscribe(); |
841 |
s1.awaitSubscribe(); |
842 |
assertTrue(p.offer(1, SHORT_DELAY_MS, MILLISECONDS, null) >= 1); |
843 |
assertTrue(p.offer(2, SHORT_DELAY_MS, MILLISECONDS, null) >= 2); |
844 |
s1.sn.request(4); |
845 |
assertTrue(p.offer(3, SHORT_DELAY_MS, MILLISECONDS, null) >= 3); |
846 |
s2.sn.request(4); |
847 |
p.offer(4, SHORT_DELAY_MS, MILLISECONDS, null); |
848 |
p.close(); |
849 |
s2.awaitComplete(); |
850 |
assertEquals(s2.nexts, 4); |
851 |
s1.awaitComplete(); |
852 |
assertEquals(s2.nexts, 4); |
853 |
} |
854 |
|
855 |
/** |
856 |
* Timed offer reports drops if saturated |
857 |
*/ |
858 |
public void testDroppedTimedOffer() { |
859 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
860 |
basicExecutor, 4); |
861 |
TestSubscriber s1 = new TestSubscriber(); |
862 |
s1.request = false; |
863 |
TestSubscriber s2 = new TestSubscriber(); |
864 |
s2.request = false; |
865 |
p.subscribe(s1); |
866 |
p.subscribe(s2); |
867 |
s2.awaitSubscribe(); |
868 |
s1.awaitSubscribe(); |
869 |
for (int i = 1; i <= 4; ++i) |
870 |
assertTrue(p.offer(i, SHORT_DELAY_MS, MILLISECONDS, null) >= 0); |
871 |
p.offer(5, SHORT_DELAY_MS, MILLISECONDS, null); |
872 |
assertTrue(p.offer(6, SHORT_DELAY_MS, MILLISECONDS, null) < 0); |
873 |
s1.sn.request(64); |
874 |
assertTrue(p.offer(7, SHORT_DELAY_MS, MILLISECONDS, null) < 0); |
875 |
s2.sn.request(64); |
876 |
p.close(); |
877 |
s2.awaitComplete(); |
878 |
assertTrue(s2.nexts >= 2); |
879 |
s1.awaitComplete(); |
880 |
assertTrue(s1.nexts >= 2); |
881 |
} |
882 |
|
883 |
/** |
884 |
* Timed offer invokes drop handler if saturated |
885 |
*/ |
886 |
public void testHandledDroppedTimedOffer() { |
887 |
AtomicInteger calls = new AtomicInteger(); |
888 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
889 |
basicExecutor, 4); |
890 |
TestSubscriber s1 = new TestSubscriber(); |
891 |
s1.request = false; |
892 |
TestSubscriber s2 = new TestSubscriber(); |
893 |
s2.request = false; |
894 |
p.subscribe(s1); |
895 |
p.subscribe(s2); |
896 |
s2.awaitSubscribe(); |
897 |
s1.awaitSubscribe(); |
898 |
for (int i = 1; i <= 4; ++i) |
899 |
assertTrue(p.offer(i, SHORT_DELAY_MS, MILLISECONDS, (s, x) -> noopHandle(calls)) >= 0); |
900 |
p.offer(5, (s, x) -> noopHandle(calls)); |
901 |
assertTrue(p.offer(6, SHORT_DELAY_MS, MILLISECONDS, (s, x) -> noopHandle(calls)) < 0); |
902 |
s1.sn.request(64); |
903 |
assertTrue(p.offer(7, SHORT_DELAY_MS, MILLISECONDS, (s, x) -> noopHandle(calls)) < 0); |
904 |
s2.sn.request(64); |
905 |
p.close(); |
906 |
s2.awaitComplete(); |
907 |
s1.awaitComplete(); |
908 |
assertTrue(calls.get() >= 2); |
909 |
} |
910 |
|
911 |
/** |
912 |
* Timed offer succeeds if drop handler forces request |
913 |
*/ |
914 |
public void testRecoveredHandledDroppedTimedOffer() { |
915 |
AtomicInteger calls = new AtomicInteger(); |
916 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
917 |
basicExecutor, 4); |
918 |
TestSubscriber s1 = new TestSubscriber(); |
919 |
s1.request = false; |
920 |
TestSubscriber s2 = new TestSubscriber(); |
921 |
s2.request = false; |
922 |
p.subscribe(s1); |
923 |
p.subscribe(s2); |
924 |
s2.awaitSubscribe(); |
925 |
s1.awaitSubscribe(); |
926 |
int n = 0; |
927 |
for (int i = 1; i <= 8; ++i) { |
928 |
int d = p.offer(i, SHORT_DELAY_MS, MILLISECONDS, (s, x) -> reqHandle(calls, s)); |
929 |
n = n + 2 + (d < 0 ? d : 0); |
930 |
} |
931 |
p.close(); |
932 |
s2.awaitComplete(); |
933 |
s1.awaitComplete(); |
934 |
assertEquals(s1.nexts + s2.nexts, n); |
935 |
assertTrue(calls.get() >= 2); |
936 |
} |
937 |
|
938 |
|
939 |
} |