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dl |
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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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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import static java.util.concurrent.TimeUnit.SECONDS; |
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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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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class SubmissionPublisherTest extends JSR166TestCase { |
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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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// 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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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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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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static class SPException extends RuntimeException {} |
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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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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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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) { |
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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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* 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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* 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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* 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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* 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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SubmissionPublisher<Integer> p = 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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SubmissionPublisher<Integer> p = 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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} |
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catch(IllegalStateException success) { |
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} |
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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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* 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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} |
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catch(IllegalStateException success) { |
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} |
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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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* 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(); |
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assertNotNull(s2.sn); |
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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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/** |
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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); |
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assertEquals(s.completes, 1); |
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} |
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/** |
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* If closedExceptionally, upon subscription, the subscriber's |
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* onError method is invoked |
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*/ |
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public void testSubscribe3() { |
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TestSubscriber s = new TestSubscriber(); |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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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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p.subscribe(s); |
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s.awaitError(); |
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assertEquals(s.nexts, 0); |
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assertEquals(s.errors, 1); |
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} |
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/** |
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* Upon attempted resubscription, the subscriber's onError is |
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* called and the subscription is cancelled. |
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*/ |
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public void testSubscribe4() { |
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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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p.subscribe(s); |
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s.awaitError(); |
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assertEquals(s.nexts, 0); |
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assertEquals(s.errors, 1); |
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assertFalse(p.isSubscribed(s)); |
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} |
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/** |
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* An exception thrown in onSubscribe causes onError |
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*/ |
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public void testSubscribe5() { |
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TestSubscriber s = new TestSubscriber(); |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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s.throwOnCall = true; |
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try { |
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p.subscribe(s); |
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} catch(Exception ok) { |
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} |
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s.awaitError(); |
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assertEquals(s.nexts, 0); |
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assertEquals(s.errors, 1); |
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assertEquals(s.completes, 0); |
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} |
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/** |
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* subscribe(null) thows NPE |
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*/ |
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public void testSubscribe6() { |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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try { |
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p.subscribe(null); |
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} catch(NullPointerException success) { |
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} |
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checkInitialState(p); |
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} |
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/** |
382 |
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* Closing a publisher causes onComplete to subscribers |
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*/ |
384 |
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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(); |
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p.subscribe(s1); |
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p.subscribe(s2); |
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p.submit(1); |
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p.close(); |
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assertTrue(p.isClosed()); |
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assertNull(p.getClosedException()); |
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s1.awaitComplete(); |
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assertEquals(s1.nexts, 1); |
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assertEquals(s1.completes, 1); |
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s2.awaitComplete(); |
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assertEquals(s2.nexts, 1); |
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assertEquals(s2.completes, 1); |
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} |
401 |
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|
402 |
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/** |
403 |
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* Closing a publisher exceptionally causes onError to subscribers |
404 |
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*/ |
405 |
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public void testCloseExceptionallyError() { |
406 |
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SubmissionPublisher<Integer> p = basicPublisher(); |
407 |
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TestSubscriber s1 = new TestSubscriber(); |
408 |
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TestSubscriber s2 = new TestSubscriber(); |
409 |
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p.subscribe(s1); |
410 |
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p.subscribe(s2); |
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p.submit(1); |
412 |
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p.closeExceptionally(new SPException()); |
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assertTrue(p.isClosed()); |
414 |
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s1.awaitError(); |
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assertTrue(s1.nexts <= 1); |
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assertEquals(s1.errors, 1); |
417 |
|
|
s2.awaitError(); |
418 |
|
|
assertTrue(s2.nexts <= 1); |
419 |
|
|
assertEquals(s2.errors, 1); |
420 |
|
|
} |
421 |
|
|
|
422 |
|
|
/** |
423 |
|
|
* Cancelling a subscription eventually causes no more onNexts to be issued |
424 |
|
|
*/ |
425 |
|
|
public void testCancel() { |
426 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
427 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
428 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
429 |
|
|
p.subscribe(s1); |
430 |
|
|
p.subscribe(s2); |
431 |
|
|
s1.awaitSubscribe(); |
432 |
|
|
p.submit(1); |
433 |
|
|
s1.sn.cancel(); |
434 |
|
|
for (int i = 2; i <= 20; ++i) |
435 |
|
|
p.submit(i); |
436 |
|
|
p.close(); |
437 |
|
|
s2.awaitComplete(); |
438 |
|
|
assertEquals(s2.nexts, 20); |
439 |
|
|
assertEquals(s2.completes, 1); |
440 |
|
|
assertTrue(s1.nexts < 20); |
441 |
|
|
assertFalse(p.isSubscribed(s1)); |
442 |
|
|
} |
443 |
|
|
|
444 |
|
|
/** |
445 |
|
|
* Throwing an exception in onNext causes onError |
446 |
|
|
*/ |
447 |
|
|
public void testThrowOnNext() { |
448 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
449 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
450 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
451 |
|
|
p.subscribe(s1); |
452 |
|
|
p.subscribe(s2); |
453 |
|
|
s1.awaitSubscribe(); |
454 |
|
|
p.submit(1); |
455 |
|
|
s1.throwOnCall = true; |
456 |
|
|
p.submit(2); |
457 |
|
|
p.close(); |
458 |
|
|
s2.awaitComplete(); |
459 |
|
|
assertEquals(s2.nexts, 2); |
460 |
|
|
s1.awaitComplete(); |
461 |
|
|
assertEquals(s1.errors, 1); |
462 |
|
|
} |
463 |
|
|
|
464 |
|
|
/** |
465 |
|
|
* If a handler is supplied in conctructor, it is invoked when |
466 |
|
|
* subscriber throws an exception in onNext |
467 |
|
|
*/ |
468 |
|
|
public void testThrowOnNextHandler() { |
469 |
|
|
AtomicInteger calls = new AtomicInteger(); |
470 |
|
|
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer> |
471 |
|
|
(basicExecutor, 8, |
472 |
|
|
(s, e) -> calls.getAndIncrement()); |
473 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
474 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
475 |
|
|
p.subscribe(s1); |
476 |
|
|
p.subscribe(s2); |
477 |
|
|
s1.awaitSubscribe(); |
478 |
|
|
p.submit(1); |
479 |
|
|
s1.throwOnCall = true; |
480 |
|
|
p.submit(2); |
481 |
|
|
p.close(); |
482 |
|
|
s2.awaitComplete(); |
483 |
|
|
assertEquals(s2.nexts, 2); |
484 |
|
|
assertEquals(s2.completes, 1); |
485 |
|
|
s1.awaitError(); |
486 |
|
|
assertEquals(s1.errors, 1); |
487 |
|
|
assertEquals(calls.get(), 1); |
488 |
|
|
} |
489 |
|
|
|
490 |
|
|
/** |
491 |
|
|
* onNext items are issued in the same order to each subscriber |
492 |
|
|
*/ |
493 |
|
|
public void testOrder() { |
494 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
495 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
496 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
497 |
|
|
p.subscribe(s1); |
498 |
|
|
p.subscribe(s2); |
499 |
|
|
for (int i = 1; i <= 20; ++i) |
500 |
|
|
p.submit(i); |
501 |
|
|
p.close(); |
502 |
|
|
s2.awaitComplete(); |
503 |
|
|
s1.awaitComplete(); |
504 |
|
|
assertEquals(s2.nexts, 20); |
505 |
|
|
assertEquals(s2.completes, 1); |
506 |
|
|
assertEquals(s1.nexts, 20); |
507 |
|
|
assertEquals(s1.completes, 1); |
508 |
|
|
} |
509 |
|
|
|
510 |
|
|
/** |
511 |
|
|
* onNext is issued only if requested |
512 |
|
|
*/ |
513 |
|
|
public void testRequest1() { |
514 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
515 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
516 |
|
|
s1.request = false; |
517 |
|
|
p.subscribe(s1); |
518 |
|
|
s1.awaitSubscribe(); |
519 |
|
|
assertTrue(p.estimateMinimumDemand() == 0); |
520 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
521 |
|
|
p.subscribe(s2); |
522 |
|
|
p.submit(1); |
523 |
|
|
p.submit(2); |
524 |
|
|
s2.awaitNext(1); |
525 |
|
|
assertEquals(s1.nexts, 0); |
526 |
|
|
s1.sn.request(3); |
527 |
|
|
p.submit(3); |
528 |
|
|
p.close(); |
529 |
|
|
s2.awaitComplete(); |
530 |
|
|
assertEquals(s2.nexts, 3); |
531 |
|
|
assertEquals(s2.completes, 1); |
532 |
|
|
s1.awaitComplete(); |
533 |
|
|
assertTrue(s1.nexts > 0); |
534 |
|
|
assertEquals(s1.completes, 1); |
535 |
|
|
} |
536 |
|
|
|
537 |
|
|
/** |
538 |
|
|
* onNext is not issued when requests become zero |
539 |
|
|
*/ |
540 |
|
|
public void testRequest2() { |
541 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
542 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
543 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
544 |
|
|
p.subscribe(s1); |
545 |
|
|
p.subscribe(s2); |
546 |
|
|
s2.awaitSubscribe(); |
547 |
|
|
s1.awaitSubscribe(); |
548 |
|
|
s1.request = false; |
549 |
|
|
p.submit(1); |
550 |
|
|
p.submit(2); |
551 |
|
|
p.close(); |
552 |
|
|
s2.awaitComplete(); |
553 |
|
|
assertEquals(s2.nexts, 2); |
554 |
|
|
assertEquals(s2.completes, 1); |
555 |
|
|
s1.awaitNext(1); |
556 |
|
|
assertEquals(s1.nexts, 1); |
557 |
|
|
} |
558 |
|
|
|
559 |
|
|
/** |
560 |
|
|
* Negative request causes error |
561 |
|
|
*/ |
562 |
|
|
public void testRequest3() { |
563 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
564 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
565 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
566 |
|
|
p.subscribe(s1); |
567 |
|
|
p.subscribe(s2); |
568 |
|
|
s2.awaitSubscribe(); |
569 |
|
|
s1.awaitSubscribe(); |
570 |
|
|
s1.sn.request(-1L); |
571 |
|
|
p.submit(1); |
572 |
|
|
p.submit(2); |
573 |
|
|
p.close(); |
574 |
|
|
s2.awaitComplete(); |
575 |
|
|
assertEquals(s2.nexts, 2); |
576 |
|
|
assertEquals(s2.completes, 1); |
577 |
|
|
s1.awaitError(); |
578 |
|
|
assertEquals(s1.errors, 1); |
579 |
|
|
assertTrue(s1.lastError instanceof IllegalArgumentException); |
580 |
|
|
} |
581 |
|
|
|
582 |
|
|
/** |
583 |
|
|
* estimateMinimumDemand reports 0 until request, nonzero after |
584 |
|
|
* request, and zero again after delivery |
585 |
|
|
*/ |
586 |
|
|
public void testEstimateMinimumDemand() { |
587 |
|
|
TestSubscriber s = new TestSubscriber(); |
588 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
589 |
|
|
s.request = false; |
590 |
|
|
p.subscribe(s); |
591 |
|
|
s.awaitSubscribe(); |
592 |
|
|
assertEquals(p.estimateMinimumDemand(), 0); |
593 |
|
|
s.sn.request(1); |
594 |
|
|
assertEquals(p.estimateMinimumDemand(), 1); |
595 |
|
|
p.submit(1); |
596 |
|
|
s.awaitNext(1); |
597 |
|
|
assertEquals(p.estimateMinimumDemand(), 0); |
598 |
|
|
} |
599 |
|
|
|
600 |
|
|
/** |
601 |
|
|
* Submit to a publisher with no subscribers returns lag 0 |
602 |
|
|
*/ |
603 |
|
|
public void testEmptySubmit() { |
604 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
605 |
|
|
assertEquals(p.submit(1), 0); |
606 |
|
|
} |
607 |
|
|
|
608 |
|
|
/** |
609 |
|
|
* Submit(null) throws NPE |
610 |
|
|
*/ |
611 |
|
|
public void testNullSubmit() { |
612 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
613 |
|
|
try { |
614 |
|
|
p.submit(null); |
615 |
|
|
} catch (NullPointerException success) { |
616 |
|
|
} |
617 |
|
|
} |
618 |
|
|
|
619 |
|
|
/** |
620 |
|
|
* Submit returns number of lagged items, compatible with result |
621 |
|
|
* of estimateMaximumLag. |
622 |
|
|
*/ |
623 |
|
|
public void testLaggedSubmit() { |
624 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
625 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
626 |
|
|
s1.request = false; |
627 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
628 |
|
|
s2.request = false; |
629 |
|
|
p.subscribe(s1); |
630 |
|
|
p.subscribe(s2); |
631 |
|
|
s2.awaitSubscribe(); |
632 |
|
|
s1.awaitSubscribe(); |
633 |
|
|
assertEquals(p.submit(1), 1); |
634 |
|
|
assertTrue(p.estimateMaximumLag() >= 1); |
635 |
|
|
assertTrue(p.submit(2) >= 2); |
636 |
|
|
assertTrue(p.estimateMaximumLag() >= 2); |
637 |
|
|
s1.sn.request(4); |
638 |
|
|
assertTrue(p.submit(3) >= 3); |
639 |
|
|
assertTrue(p.estimateMaximumLag() >= 3); |
640 |
|
|
s2.sn.request(4); |
641 |
|
|
p.submit(4); |
642 |
|
|
p.close(); |
643 |
|
|
s2.awaitComplete(); |
644 |
|
|
assertEquals(s2.nexts, 4); |
645 |
|
|
s1.awaitComplete(); |
646 |
|
|
assertEquals(s2.nexts, 4); |
647 |
|
|
} |
648 |
|
|
|
649 |
|
|
/** |
650 |
|
|
* submit eventually issues requested items when buffer capacity is 1 |
651 |
|
|
*/ |
652 |
|
|
public void testCap1Submit() { |
653 |
|
|
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
654 |
|
|
basicExecutor, 1); |
655 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
656 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
657 |
|
|
p.subscribe(s1); |
658 |
|
|
p.subscribe(s2); |
659 |
|
|
for (int i = 1; i <= 20; ++i) { |
660 |
|
|
assertTrue(p.estimateMinimumDemand() <= 1); |
661 |
|
|
assertTrue(p.submit(i) >= 0); |
662 |
|
|
} |
663 |
|
|
p.close(); |
664 |
|
|
s2.awaitComplete(); |
665 |
|
|
s1.awaitComplete(); |
666 |
|
|
assertEquals(s2.nexts, 20); |
667 |
|
|
assertEquals(s2.completes, 1); |
668 |
|
|
assertEquals(s1.nexts, 20); |
669 |
|
|
assertEquals(s1.completes, 1); |
670 |
|
|
} |
671 |
|
|
|
672 |
|
|
static boolean noopHandle(AtomicInteger count) { |
673 |
|
|
count.getAndIncrement(); |
674 |
|
|
return false; |
675 |
|
|
} |
676 |
|
|
|
677 |
|
|
static boolean reqHandle(AtomicInteger count, Subscriber s) { |
678 |
|
|
count.getAndIncrement(); |
679 |
|
|
((TestSubscriber)s).sn.request(Long.MAX_VALUE); |
680 |
|
|
return true; |
681 |
|
|
} |
682 |
|
|
|
683 |
|
|
/** |
684 |
|
|
* Offer to a publisher with no subscribers returns lag 0 |
685 |
|
|
*/ |
686 |
|
|
public void testEmptyOffer() { |
687 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
688 |
|
|
assertEquals(p.offer(1, null), 0); |
689 |
|
|
} |
690 |
|
|
|
691 |
|
|
/** |
692 |
|
|
* Offer(null) throws NPE |
693 |
|
|
*/ |
694 |
|
|
public void testNullOffer() { |
695 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
696 |
|
|
try { |
697 |
|
|
p.offer(null, null); |
698 |
|
|
} catch (NullPointerException success) { |
699 |
|
|
} |
700 |
|
|
} |
701 |
|
|
|
702 |
|
|
/** |
703 |
|
|
* Offer returns number of lagged items if not saturated |
704 |
|
|
*/ |
705 |
|
|
public void testLaggedOffer() { |
706 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
707 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
708 |
|
|
s1.request = false; |
709 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
710 |
|
|
s2.request = false; |
711 |
|
|
p.subscribe(s1); |
712 |
|
|
p.subscribe(s2); |
713 |
|
|
s2.awaitSubscribe(); |
714 |
|
|
s1.awaitSubscribe(); |
715 |
|
|
assertTrue(p.offer(1, null) >= 1); |
716 |
|
|
assertTrue(p.offer(2, null) >= 2); |
717 |
|
|
s1.sn.request(4); |
718 |
|
|
assertTrue(p.offer(3, null) >= 3); |
719 |
|
|
s2.sn.request(4); |
720 |
|
|
p.offer(4, null); |
721 |
|
|
p.close(); |
722 |
|
|
s2.awaitComplete(); |
723 |
|
|
assertEquals(s2.nexts, 4); |
724 |
|
|
s1.awaitComplete(); |
725 |
|
|
assertEquals(s2.nexts, 4); |
726 |
|
|
} |
727 |
|
|
|
728 |
|
|
/** |
729 |
|
|
* Offer reports drops if saturated |
730 |
|
|
*/ |
731 |
|
|
public void testDroppedOffer() { |
732 |
|
|
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
733 |
|
|
basicExecutor, 4); |
734 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
735 |
|
|
s1.request = false; |
736 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
737 |
|
|
s2.request = false; |
738 |
|
|
p.subscribe(s1); |
739 |
|
|
p.subscribe(s2); |
740 |
|
|
s2.awaitSubscribe(); |
741 |
|
|
s1.awaitSubscribe(); |
742 |
|
|
for (int i = 1; i <= 4; ++i) |
743 |
|
|
assertTrue(p.offer(i, null) >= 0); |
744 |
|
|
p.offer(5, null); |
745 |
|
|
assertTrue(p.offer(6, null) < 0); |
746 |
|
|
s1.sn.request(64); |
747 |
|
|
assertTrue(p.offer(7, null) < 0); |
748 |
|
|
s2.sn.request(64); |
749 |
|
|
p.close(); |
750 |
|
|
s2.awaitComplete(); |
751 |
|
|
assertTrue(s2.nexts >= 4); |
752 |
|
|
s1.awaitComplete(); |
753 |
|
|
assertTrue(s1.nexts >= 4); |
754 |
|
|
} |
755 |
|
|
|
756 |
|
|
/** |
757 |
|
|
* Offer invokes drop handler if saturated |
758 |
|
|
*/ |
759 |
|
|
public void testHandledDroppedOffer() { |
760 |
|
|
AtomicInteger calls = new AtomicInteger(); |
761 |
|
|
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
762 |
|
|
basicExecutor, 4); |
763 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
764 |
|
|
s1.request = false; |
765 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
766 |
|
|
s2.request = false; |
767 |
|
|
p.subscribe(s1); |
768 |
|
|
p.subscribe(s2); |
769 |
|
|
s2.awaitSubscribe(); |
770 |
|
|
s1.awaitSubscribe(); |
771 |
|
|
for (int i = 1; i <= 4; ++i) |
772 |
|
|
assertTrue(p.offer(i, (s, x) -> noopHandle(calls)) >= 0); |
773 |
|
|
p.offer(4, (s, x) -> noopHandle(calls)); |
774 |
|
|
assertTrue(p.offer(6, (s, x) -> noopHandle(calls)) < 0); |
775 |
|
|
s1.sn.request(64); |
776 |
|
|
assertTrue(p.offer(7, (s, x) -> noopHandle(calls)) < 0); |
777 |
|
|
s2.sn.request(64); |
778 |
|
|
p.close(); |
779 |
|
|
s2.awaitComplete(); |
780 |
|
|
s1.awaitComplete(); |
781 |
|
|
assertTrue(calls.get() >= 4); |
782 |
|
|
} |
783 |
|
|
|
784 |
|
|
|
785 |
|
|
/** |
786 |
|
|
* Offer succeeds if drop handler forces request |
787 |
|
|
*/ |
788 |
|
|
public void testRecoveredHandledDroppedOffer() { |
789 |
|
|
AtomicInteger calls = new AtomicInteger(); |
790 |
|
|
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
791 |
|
|
basicExecutor, 4); |
792 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
793 |
|
|
s1.request = false; |
794 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
795 |
|
|
s2.request = false; |
796 |
|
|
p.subscribe(s1); |
797 |
|
|
p.subscribe(s2); |
798 |
|
|
s2.awaitSubscribe(); |
799 |
|
|
s1.awaitSubscribe(); |
800 |
|
|
int n = 0; |
801 |
|
|
for (int i = 1; i <= 8; ++i) { |
802 |
|
|
int d = p.offer(i, (s, x) -> reqHandle(calls, s)); |
803 |
|
|
n = n + 2 + (d < 0 ? d : 0); |
804 |
|
|
} |
805 |
|
|
p.close(); |
806 |
|
|
s2.awaitComplete(); |
807 |
|
|
s1.awaitComplete(); |
808 |
|
|
assertEquals(s1.nexts + s2.nexts, n); |
809 |
|
|
assertTrue(calls.get() >= 2); |
810 |
|
|
} |
811 |
|
|
|
812 |
|
|
|
813 |
|
|
/** |
814 |
|
|
* TimedOffer to a publisher with no subscribers returns lag 0 |
815 |
|
|
*/ |
816 |
|
|
public void testEmptyTimedOffer() { |
817 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
818 |
|
|
assertEquals(p.offer(1, null), 0); |
819 |
|
|
} |
820 |
|
|
|
821 |
|
|
/** |
822 |
|
|
* Timed Offer with null item or TimeUnit throws NPE |
823 |
|
|
*/ |
824 |
|
|
public void testNullTimedOffer() { |
825 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
826 |
|
|
try { |
827 |
|
|
p.offer(null, SHORT_DELAY_MS, MILLISECONDS, null); |
828 |
|
|
} catch (NullPointerException success) { |
829 |
|
|
} |
830 |
|
|
try { |
831 |
|
|
p.offer(1, SHORT_DELAY_MS, null, null); |
832 |
|
|
} catch (NullPointerException success) { |
833 |
|
|
} |
834 |
|
|
} |
835 |
|
|
|
836 |
|
|
/** |
837 |
|
|
* Timed Offer returns number of lagged items if not saturated |
838 |
|
|
*/ |
839 |
|
|
public void testLaggedTimedOffer() { |
840 |
|
|
SubmissionPublisher<Integer> p = basicPublisher(); |
841 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
842 |
|
|
s1.request = false; |
843 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
844 |
|
|
s2.request = false; |
845 |
|
|
p.subscribe(s1); |
846 |
|
|
p.subscribe(s2); |
847 |
|
|
s2.awaitSubscribe(); |
848 |
|
|
s1.awaitSubscribe(); |
849 |
|
|
assertTrue(p.offer(1, SHORT_DELAY_MS, MILLISECONDS, null) >= 1); |
850 |
|
|
assertTrue(p.offer(2, SHORT_DELAY_MS, MILLISECONDS, null) >= 2); |
851 |
|
|
s1.sn.request(4); |
852 |
|
|
assertTrue(p.offer(3, SHORT_DELAY_MS, MILLISECONDS, null) >= 3); |
853 |
|
|
s2.sn.request(4); |
854 |
|
|
p.offer(4, SHORT_DELAY_MS, MILLISECONDS, null); |
855 |
|
|
p.close(); |
856 |
|
|
s2.awaitComplete(); |
857 |
|
|
assertEquals(s2.nexts, 4); |
858 |
|
|
s1.awaitComplete(); |
859 |
|
|
assertEquals(s2.nexts, 4); |
860 |
|
|
} |
861 |
|
|
|
862 |
|
|
/** |
863 |
|
|
* Timed Offer reports drops if saturated |
864 |
|
|
*/ |
865 |
|
|
public void testDroppedTimedOffer() { |
866 |
|
|
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
867 |
|
|
basicExecutor, 4); |
868 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
869 |
|
|
s1.request = false; |
870 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
871 |
|
|
s2.request = false; |
872 |
|
|
p.subscribe(s1); |
873 |
|
|
p.subscribe(s2); |
874 |
|
|
s2.awaitSubscribe(); |
875 |
|
|
s1.awaitSubscribe(); |
876 |
|
|
for (int i = 1; i <= 4; ++i) |
877 |
|
|
assertTrue(p.offer(i, SHORT_DELAY_MS, MILLISECONDS, null) >= 0); |
878 |
|
|
p.offer(5, SHORT_DELAY_MS, MILLISECONDS, null); |
879 |
|
|
assertTrue(p.offer(6, SHORT_DELAY_MS, MILLISECONDS, null) < 0); |
880 |
|
|
s1.sn.request(64); |
881 |
|
|
assertTrue(p.offer(7, SHORT_DELAY_MS, MILLISECONDS, null) < 0); |
882 |
|
|
s2.sn.request(64); |
883 |
|
|
p.close(); |
884 |
|
|
s2.awaitComplete(); |
885 |
|
|
assertTrue(s2.nexts >= 2); |
886 |
|
|
s1.awaitComplete(); |
887 |
|
|
assertTrue(s1.nexts >= 2); |
888 |
|
|
} |
889 |
|
|
|
890 |
|
|
/** |
891 |
|
|
* Timed Offer invokes drop handler if saturated |
892 |
|
|
*/ |
893 |
|
|
public void testHandledDroppedTimedOffer() { |
894 |
|
|
AtomicInteger calls = new AtomicInteger(); |
895 |
|
|
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
896 |
|
|
basicExecutor, 4); |
897 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
898 |
|
|
s1.request = false; |
899 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
900 |
|
|
s2.request = false; |
901 |
|
|
p.subscribe(s1); |
902 |
|
|
p.subscribe(s2); |
903 |
|
|
s2.awaitSubscribe(); |
904 |
|
|
s1.awaitSubscribe(); |
905 |
|
|
for (int i = 1; i <= 4; ++i) |
906 |
|
|
assertTrue(p.offer(i, SHORT_DELAY_MS, MILLISECONDS, (s, x) -> noopHandle(calls)) >= 0); |
907 |
|
|
p.offer(5, (s, x) -> noopHandle(calls)); |
908 |
|
|
assertTrue(p.offer(6, SHORT_DELAY_MS, MILLISECONDS, (s, x) -> noopHandle(calls)) < 0); |
909 |
|
|
s1.sn.request(64); |
910 |
|
|
assertTrue(p.offer(7, SHORT_DELAY_MS, MILLISECONDS, (s, x) -> noopHandle(calls)) < 0); |
911 |
|
|
s2.sn.request(64); |
912 |
|
|
p.close(); |
913 |
|
|
s2.awaitComplete(); |
914 |
|
|
s1.awaitComplete(); |
915 |
|
|
assertTrue(calls.get() >= 2); |
916 |
|
|
} |
917 |
|
|
|
918 |
|
|
/** |
919 |
|
|
* Timed Offer succeeds if drop handler forces request |
920 |
|
|
*/ |
921 |
|
|
public void testRecoveredHandledDroppedTimedOffer() { |
922 |
|
|
AtomicInteger calls = new AtomicInteger(); |
923 |
|
|
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
924 |
|
|
basicExecutor, 4); |
925 |
|
|
TestSubscriber s1 = new TestSubscriber(); |
926 |
|
|
s1.request = false; |
927 |
|
|
TestSubscriber s2 = new TestSubscriber(); |
928 |
|
|
s2.request = false; |
929 |
|
|
p.subscribe(s1); |
930 |
|
|
p.subscribe(s2); |
931 |
|
|
s2.awaitSubscribe(); |
932 |
|
|
s1.awaitSubscribe(); |
933 |
|
|
int n = 0; |
934 |
|
|
for (int i = 1; i <= 8; ++i) { |
935 |
|
|
int d = p.offer(i, SHORT_DELAY_MS, MILLISECONDS, (s, x) -> reqHandle(calls, s)); |
936 |
|
|
n = n + 2 + (d < 0 ? d : 0); |
937 |
|
|
} |
938 |
|
|
p.close(); |
939 |
|
|
s2.awaitComplete(); |
940 |
|
|
s1.awaitComplete(); |
941 |
|
|
assertEquals(s1.nexts + s2.nexts, n); |
942 |
|
|
assertTrue(calls.get() >= 2); |
943 |
|
|
} |
944 |
|
|
|
945 |
|
|
|
946 |
|
|
} |