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/* |
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* Written by Doug Lea and Martin Buchholz with assistance from |
3 |
* 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 java.util.concurrent.CompletableFuture; |
9 |
import java.util.concurrent.Executor; |
10 |
import java.util.concurrent.Executors; |
11 |
import java.util.concurrent.Flow; |
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import java.util.concurrent.ForkJoinPool; |
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import java.util.concurrent.LinkedBlockingQueue; |
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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.BiFunction; |
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import java.util.function.BiPredicate; |
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import java.util.stream.Stream; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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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 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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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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final Executor basicExecutor = basicPublisher().getExecutor(); |
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|
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static SubmissionPublisher<Integer> basicPublisher() { |
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return new SubmissionPublisher<Integer>(); |
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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() { |
93 |
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) { |
114 |
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() { |
123 |
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(0, p.getNumberOfSubscribers()); |
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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(0, p.estimateMinimumDemand()); |
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assertEquals(0, p.estimateMaximumLag()); |
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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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* defaultExecutor |
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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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assertEquals(p.getMaxBufferCapacity(), Flow.defaultBufferSize()); |
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Executor e = p.getExecutor(), c = ForkJoinPool.commonPool(); |
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if (ForkJoinPool.getCommonPoolParallelism() > 1) |
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assertSame(e, c); |
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else |
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assertNotSame(e, c); |
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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(8, p.getMaxBufferCapacity()); |
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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(1, p.getNumberOfSubscribers()); |
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assertTrue(p.getSubscribers().contains(s)); |
259 |
assertTrue(p.isSubscribed(s)); |
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s.awaitSubscribe(); |
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assertNotNull(s.sn); |
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assertEquals(0, s.nexts); |
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assertEquals(0, s.errors); |
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assertEquals(0, s.completes); |
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TestSubscriber s2 = new TestSubscriber(); |
266 |
p.subscribe(s2); |
267 |
assertTrue(p.hasSubscribers()); |
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assertEquals(2, p.getNumberOfSubscribers()); |
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assertTrue(p.getSubscribers().contains(s)); |
270 |
assertTrue(p.getSubscribers().contains(s2)); |
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assertTrue(p.isSubscribed(s)); |
272 |
assertTrue(p.isSubscribed(s2)); |
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s2.awaitSubscribe(); |
274 |
assertNotNull(s2.sn); |
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assertEquals(0, s2.nexts); |
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assertEquals(0, s2.errors); |
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assertEquals(0, s2.completes); |
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p.close(); |
279 |
} |
280 |
|
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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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*/ |
285 |
public void testSubscribe2() { |
286 |
TestSubscriber s = new TestSubscriber(); |
287 |
SubmissionPublisher<Integer> p = basicPublisher(); |
288 |
p.close(); |
289 |
p.subscribe(s); |
290 |
s.awaitComplete(); |
291 |
assertEquals(0, s.nexts); |
292 |
assertEquals(0, s.errors); |
293 |
assertEquals(1, s.completes, 1); |
294 |
} |
295 |
|
296 |
/** |
297 |
* If closedExceptionally, upon subscription, the subscriber's |
298 |
* onError method is invoked |
299 |
*/ |
300 |
public void testSubscribe3() { |
301 |
TestSubscriber s = new TestSubscriber(); |
302 |
SubmissionPublisher<Integer> p = basicPublisher(); |
303 |
Throwable ex = new SPException(); |
304 |
p.closeExceptionally(ex); |
305 |
assertTrue(p.isClosed()); |
306 |
assertSame(p.getClosedException(), ex); |
307 |
p.subscribe(s); |
308 |
s.awaitError(); |
309 |
assertEquals(0, s.nexts); |
310 |
assertEquals(1, s.errors); |
311 |
} |
312 |
|
313 |
/** |
314 |
* Upon attempted resubscription, the subscriber's onError is |
315 |
* called and the subscription is cancelled. |
316 |
*/ |
317 |
public void testSubscribe4() { |
318 |
TestSubscriber s = new TestSubscriber(); |
319 |
SubmissionPublisher<Integer> p = basicPublisher(); |
320 |
p.subscribe(s); |
321 |
assertTrue(p.hasSubscribers()); |
322 |
assertEquals(1, p.getNumberOfSubscribers()); |
323 |
assertTrue(p.getSubscribers().contains(s)); |
324 |
assertTrue(p.isSubscribed(s)); |
325 |
s.awaitSubscribe(); |
326 |
assertNotNull(s.sn); |
327 |
assertEquals(0, s.nexts); |
328 |
assertEquals(0, s.errors); |
329 |
assertEquals(0, s.completes); |
330 |
p.subscribe(s); |
331 |
s.awaitError(); |
332 |
assertEquals(0, s.nexts); |
333 |
assertEquals(1, s.errors); |
334 |
assertFalse(p.isSubscribed(s)); |
335 |
} |
336 |
|
337 |
/** |
338 |
* An exception thrown in onSubscribe causes onError |
339 |
*/ |
340 |
public void testSubscribe5() { |
341 |
TestSubscriber s = new TestSubscriber(); |
342 |
SubmissionPublisher<Integer> p = basicPublisher(); |
343 |
s.throwOnCall = true; |
344 |
try { |
345 |
p.subscribe(s); |
346 |
} catch (Exception ok) {} |
347 |
s.awaitError(); |
348 |
assertEquals(0, s.nexts); |
349 |
assertEquals(1, s.errors); |
350 |
assertEquals(0, s.completes); |
351 |
} |
352 |
|
353 |
/** |
354 |
* subscribe(null) throws NPE |
355 |
*/ |
356 |
public void testSubscribe6() { |
357 |
SubmissionPublisher<Integer> p = basicPublisher(); |
358 |
try { |
359 |
p.subscribe(null); |
360 |
shouldThrow(); |
361 |
} catch (NullPointerException success) {} |
362 |
checkInitialState(p); |
363 |
} |
364 |
|
365 |
/** |
366 |
* Closing a publisher causes onComplete to subscribers |
367 |
*/ |
368 |
public void testCloseCompletes() { |
369 |
SubmissionPublisher<Integer> p = basicPublisher(); |
370 |
TestSubscriber s1 = new TestSubscriber(); |
371 |
TestSubscriber s2 = new TestSubscriber(); |
372 |
p.subscribe(s1); |
373 |
p.subscribe(s2); |
374 |
p.submit(1); |
375 |
p.close(); |
376 |
assertTrue(p.isClosed()); |
377 |
assertNull(p.getClosedException()); |
378 |
s1.awaitComplete(); |
379 |
assertEquals(1, s1.nexts); |
380 |
assertEquals(1, s1.completes); |
381 |
s2.awaitComplete(); |
382 |
assertEquals(1, s2.nexts); |
383 |
assertEquals(1, s2.completes); |
384 |
} |
385 |
|
386 |
/** |
387 |
* Closing a publisher exceptionally causes onError to subscribers |
388 |
*/ |
389 |
public void testCloseExceptionallyError() { |
390 |
SubmissionPublisher<Integer> p = basicPublisher(); |
391 |
TestSubscriber s1 = new TestSubscriber(); |
392 |
TestSubscriber s2 = new TestSubscriber(); |
393 |
p.subscribe(s1); |
394 |
p.subscribe(s2); |
395 |
p.submit(1); |
396 |
p.closeExceptionally(new SPException()); |
397 |
assertTrue(p.isClosed()); |
398 |
s1.awaitError(); |
399 |
assertTrue(s1.nexts <= 1); |
400 |
assertEquals(1, s1.errors); |
401 |
s2.awaitError(); |
402 |
assertTrue(s2.nexts <= 1); |
403 |
assertEquals(1, s2.errors); |
404 |
} |
405 |
|
406 |
/** |
407 |
* Cancelling a subscription eventually causes no more onNexts to be issued |
408 |
*/ |
409 |
public void testCancel() { |
410 |
SubmissionPublisher<Integer> p = basicPublisher(); |
411 |
TestSubscriber s1 = new TestSubscriber(); |
412 |
TestSubscriber s2 = new TestSubscriber(); |
413 |
p.subscribe(s1); |
414 |
p.subscribe(s2); |
415 |
s1.awaitSubscribe(); |
416 |
p.submit(1); |
417 |
s1.sn.cancel(); |
418 |
for (int i = 2; i <= 20; ++i) |
419 |
p.submit(i); |
420 |
p.close(); |
421 |
s2.awaitComplete(); |
422 |
assertEquals(20, s2.nexts); |
423 |
assertEquals(1, s2.completes); |
424 |
assertTrue(s1.nexts < 20); |
425 |
assertFalse(p.isSubscribed(s1)); |
426 |
} |
427 |
|
428 |
/** |
429 |
* Throwing an exception in onNext causes onError |
430 |
*/ |
431 |
public void testThrowOnNext() { |
432 |
SubmissionPublisher<Integer> p = basicPublisher(); |
433 |
TestSubscriber s1 = new TestSubscriber(); |
434 |
TestSubscriber s2 = new TestSubscriber(); |
435 |
p.subscribe(s1); |
436 |
p.subscribe(s2); |
437 |
s1.awaitSubscribe(); |
438 |
p.submit(1); |
439 |
s1.throwOnCall = true; |
440 |
p.submit(2); |
441 |
p.close(); |
442 |
s2.awaitComplete(); |
443 |
assertEquals(2, s2.nexts); |
444 |
s1.awaitComplete(); |
445 |
assertEquals(1, s1.errors); |
446 |
} |
447 |
|
448 |
/** |
449 |
* If a handler is supplied in constructor, it is invoked when |
450 |
* subscriber throws an exception in onNext |
451 |
*/ |
452 |
public void testThrowOnNextHandler() { |
453 |
AtomicInteger calls = new AtomicInteger(); |
454 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer> |
455 |
(basicExecutor, 8, |
456 |
(s, e) -> calls.getAndIncrement()); |
457 |
TestSubscriber s1 = new TestSubscriber(); |
458 |
TestSubscriber s2 = new TestSubscriber(); |
459 |
p.subscribe(s1); |
460 |
p.subscribe(s2); |
461 |
s1.awaitSubscribe(); |
462 |
p.submit(1); |
463 |
s1.throwOnCall = true; |
464 |
p.submit(2); |
465 |
p.close(); |
466 |
s2.awaitComplete(); |
467 |
assertEquals(2, s2.nexts); |
468 |
assertEquals(1, s2.completes); |
469 |
s1.awaitError(); |
470 |
assertEquals(1, s1.errors); |
471 |
assertEquals(1, calls.get()); |
472 |
} |
473 |
|
474 |
/** |
475 |
* onNext items are issued in the same order to each subscriber |
476 |
*/ |
477 |
public void testOrder() { |
478 |
SubmissionPublisher<Integer> p = basicPublisher(); |
479 |
TestSubscriber s1 = new TestSubscriber(); |
480 |
TestSubscriber s2 = new TestSubscriber(); |
481 |
p.subscribe(s1); |
482 |
p.subscribe(s2); |
483 |
for (int i = 1; i <= 20; ++i) |
484 |
p.submit(i); |
485 |
p.close(); |
486 |
s2.awaitComplete(); |
487 |
s1.awaitComplete(); |
488 |
assertEquals(20, s2.nexts); |
489 |
assertEquals(1, s2.completes); |
490 |
assertEquals(20, s1.nexts); |
491 |
assertEquals(1, s1.completes); |
492 |
} |
493 |
|
494 |
/** |
495 |
* onNext is issued only if requested |
496 |
*/ |
497 |
public void testRequest1() { |
498 |
SubmissionPublisher<Integer> p = basicPublisher(); |
499 |
TestSubscriber s1 = new TestSubscriber(); |
500 |
s1.request = false; |
501 |
p.subscribe(s1); |
502 |
s1.awaitSubscribe(); |
503 |
assertTrue(p.estimateMinimumDemand() == 0); |
504 |
TestSubscriber s2 = new TestSubscriber(); |
505 |
p.subscribe(s2); |
506 |
p.submit(1); |
507 |
p.submit(2); |
508 |
s2.awaitNext(1); |
509 |
assertEquals(0, s1.nexts); |
510 |
s1.sn.request(3); |
511 |
p.submit(3); |
512 |
p.close(); |
513 |
s2.awaitComplete(); |
514 |
assertEquals(3, s2.nexts); |
515 |
assertEquals(1, s2.completes); |
516 |
s1.awaitComplete(); |
517 |
assertTrue(s1.nexts > 0); |
518 |
assertEquals(1, s1.completes); |
519 |
} |
520 |
|
521 |
/** |
522 |
* onNext is not issued when requests become zero |
523 |
*/ |
524 |
public void testRequest2() { |
525 |
SubmissionPublisher<Integer> p = basicPublisher(); |
526 |
TestSubscriber s1 = new TestSubscriber(); |
527 |
TestSubscriber s2 = new TestSubscriber(); |
528 |
p.subscribe(s1); |
529 |
p.subscribe(s2); |
530 |
s2.awaitSubscribe(); |
531 |
s1.awaitSubscribe(); |
532 |
s1.request = false; |
533 |
p.submit(1); |
534 |
p.submit(2); |
535 |
p.close(); |
536 |
s2.awaitComplete(); |
537 |
assertEquals(2, s2.nexts); |
538 |
assertEquals(1, s2.completes); |
539 |
s1.awaitNext(1); |
540 |
assertEquals(1, s1.nexts); |
541 |
} |
542 |
|
543 |
/** |
544 |
* Negative request causes error |
545 |
*/ |
546 |
public void testRequest3() { |
547 |
SubmissionPublisher<Integer> p = basicPublisher(); |
548 |
TestSubscriber s1 = new TestSubscriber(); |
549 |
TestSubscriber s2 = new TestSubscriber(); |
550 |
p.subscribe(s1); |
551 |
p.subscribe(s2); |
552 |
s2.awaitSubscribe(); |
553 |
s1.awaitSubscribe(); |
554 |
s1.sn.request(-1L); |
555 |
p.submit(1); |
556 |
p.submit(2); |
557 |
p.close(); |
558 |
s2.awaitComplete(); |
559 |
assertEquals(2, s2.nexts); |
560 |
assertEquals(1, s2.completes); |
561 |
s1.awaitError(); |
562 |
assertEquals(1, s1.errors); |
563 |
assertTrue(s1.lastError instanceof IllegalArgumentException); |
564 |
} |
565 |
|
566 |
/** |
567 |
* estimateMinimumDemand reports 0 until request, nonzero after |
568 |
* request, and zero again after delivery |
569 |
*/ |
570 |
public void testEstimateMinimumDemand() { |
571 |
TestSubscriber s = new TestSubscriber(); |
572 |
SubmissionPublisher<Integer> p = basicPublisher(); |
573 |
s.request = false; |
574 |
p.subscribe(s); |
575 |
s.awaitSubscribe(); |
576 |
assertEquals(0, p.estimateMinimumDemand()); |
577 |
s.sn.request(1); |
578 |
assertEquals(1, p.estimateMinimumDemand()); |
579 |
p.submit(1); |
580 |
s.awaitNext(1); |
581 |
assertEquals(0, p.estimateMinimumDemand()); |
582 |
} |
583 |
|
584 |
/** |
585 |
* submit to a publisher with no subscribers returns lag 0 |
586 |
*/ |
587 |
public void testEmptySubmit() { |
588 |
SubmissionPublisher<Integer> p = basicPublisher(); |
589 |
assertEquals(0, p.submit(1)); |
590 |
} |
591 |
|
592 |
/** |
593 |
* submit(null) throws NPE |
594 |
*/ |
595 |
public void testNullSubmit() { |
596 |
SubmissionPublisher<Integer> p = basicPublisher(); |
597 |
try { |
598 |
p.submit(null); |
599 |
shouldThrow(); |
600 |
} catch (NullPointerException success) {} |
601 |
} |
602 |
|
603 |
/** |
604 |
* submit returns number of lagged items, compatible with result |
605 |
* of estimateMaximumLag. |
606 |
*/ |
607 |
public void testLaggedSubmit() { |
608 |
SubmissionPublisher<Integer> p = basicPublisher(); |
609 |
TestSubscriber s1 = new TestSubscriber(); |
610 |
s1.request = false; |
611 |
TestSubscriber s2 = new TestSubscriber(); |
612 |
s2.request = false; |
613 |
p.subscribe(s1); |
614 |
p.subscribe(s2); |
615 |
s2.awaitSubscribe(); |
616 |
s1.awaitSubscribe(); |
617 |
assertEquals(1, p.submit(1)); |
618 |
assertTrue(p.estimateMaximumLag() >= 1); |
619 |
assertTrue(p.submit(2) >= 2); |
620 |
assertTrue(p.estimateMaximumLag() >= 2); |
621 |
s1.sn.request(4); |
622 |
assertTrue(p.submit(3) >= 3); |
623 |
assertTrue(p.estimateMaximumLag() >= 3); |
624 |
s2.sn.request(4); |
625 |
p.submit(4); |
626 |
p.close(); |
627 |
s2.awaitComplete(); |
628 |
assertEquals(4, s2.nexts); |
629 |
s1.awaitComplete(); |
630 |
assertEquals(4, s2.nexts); |
631 |
} |
632 |
|
633 |
/** |
634 |
* submit eventually issues requested items when buffer capacity is 1 |
635 |
*/ |
636 |
public void testCap1Submit() { |
637 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
638 |
basicExecutor, 1); |
639 |
TestSubscriber s1 = new TestSubscriber(); |
640 |
TestSubscriber s2 = new TestSubscriber(); |
641 |
p.subscribe(s1); |
642 |
p.subscribe(s2); |
643 |
for (int i = 1; i <= 20; ++i) { |
644 |
assertTrue(p.estimateMinimumDemand() <= 1); |
645 |
assertTrue(p.submit(i) >= 0); |
646 |
} |
647 |
p.close(); |
648 |
s2.awaitComplete(); |
649 |
s1.awaitComplete(); |
650 |
assertEquals(20, s2.nexts); |
651 |
assertEquals(1, s2.completes); |
652 |
assertEquals(20, s1.nexts); |
653 |
assertEquals(1, s1.completes); |
654 |
} |
655 |
|
656 |
static boolean noopHandle(AtomicInteger count) { |
657 |
count.getAndIncrement(); |
658 |
return false; |
659 |
} |
660 |
|
661 |
static boolean reqHandle(AtomicInteger count, Subscriber s) { |
662 |
count.getAndIncrement(); |
663 |
((TestSubscriber)s).sn.request(Long.MAX_VALUE); |
664 |
return true; |
665 |
} |
666 |
|
667 |
/** |
668 |
* offer to a publisher with no subscribers returns lag 0 |
669 |
*/ |
670 |
public void testEmptyOffer() { |
671 |
SubmissionPublisher<Integer> p = basicPublisher(); |
672 |
assertEquals(0, p.offer(1, null)); |
673 |
} |
674 |
|
675 |
/** |
676 |
* offer(null) throws NPE |
677 |
*/ |
678 |
public void testNullOffer() { |
679 |
SubmissionPublisher<Integer> p = basicPublisher(); |
680 |
try { |
681 |
p.offer(null, null); |
682 |
shouldThrow(); |
683 |
} catch (NullPointerException success) {} |
684 |
} |
685 |
|
686 |
/** |
687 |
* offer returns number of lagged items if not saturated |
688 |
*/ |
689 |
public void testLaggedOffer() { |
690 |
SubmissionPublisher<Integer> p = basicPublisher(); |
691 |
TestSubscriber s1 = new TestSubscriber(); |
692 |
s1.request = false; |
693 |
TestSubscriber s2 = new TestSubscriber(); |
694 |
s2.request = false; |
695 |
p.subscribe(s1); |
696 |
p.subscribe(s2); |
697 |
s2.awaitSubscribe(); |
698 |
s1.awaitSubscribe(); |
699 |
assertTrue(p.offer(1, null) >= 1); |
700 |
assertTrue(p.offer(2, null) >= 2); |
701 |
s1.sn.request(4); |
702 |
assertTrue(p.offer(3, null) >= 3); |
703 |
s2.sn.request(4); |
704 |
p.offer(4, null); |
705 |
p.close(); |
706 |
s2.awaitComplete(); |
707 |
assertEquals(4, s2.nexts); |
708 |
s1.awaitComplete(); |
709 |
assertEquals(4, s2.nexts); |
710 |
} |
711 |
|
712 |
/** |
713 |
* offer reports drops if saturated |
714 |
*/ |
715 |
public void testDroppedOffer() { |
716 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
717 |
basicExecutor, 4); |
718 |
TestSubscriber s1 = new TestSubscriber(); |
719 |
s1.request = false; |
720 |
TestSubscriber s2 = new TestSubscriber(); |
721 |
s2.request = false; |
722 |
p.subscribe(s1); |
723 |
p.subscribe(s2); |
724 |
s2.awaitSubscribe(); |
725 |
s1.awaitSubscribe(); |
726 |
for (int i = 1; i <= 4; ++i) |
727 |
assertTrue(p.offer(i, null) >= 0); |
728 |
p.offer(5, null); |
729 |
assertTrue(p.offer(6, null) < 0); |
730 |
s1.sn.request(64); |
731 |
assertTrue(p.offer(7, null) < 0); |
732 |
s2.sn.request(64); |
733 |
p.close(); |
734 |
s2.awaitComplete(); |
735 |
assertTrue(s2.nexts >= 4); |
736 |
s1.awaitComplete(); |
737 |
assertTrue(s1.nexts >= 4); |
738 |
} |
739 |
|
740 |
/** |
741 |
* offer invokes drop handler if saturated |
742 |
*/ |
743 |
public void testHandledDroppedOffer() { |
744 |
AtomicInteger calls = new AtomicInteger(); |
745 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
746 |
basicExecutor, 4); |
747 |
TestSubscriber s1 = new TestSubscriber(); |
748 |
s1.request = false; |
749 |
TestSubscriber s2 = new TestSubscriber(); |
750 |
s2.request = false; |
751 |
p.subscribe(s1); |
752 |
p.subscribe(s2); |
753 |
s2.awaitSubscribe(); |
754 |
s1.awaitSubscribe(); |
755 |
for (int i = 1; i <= 4; ++i) |
756 |
assertTrue(p.offer(i, (s, x) -> noopHandle(calls)) >= 0); |
757 |
p.offer(4, (s, x) -> noopHandle(calls)); |
758 |
assertTrue(p.offer(6, (s, x) -> noopHandle(calls)) < 0); |
759 |
s1.sn.request(64); |
760 |
assertTrue(p.offer(7, (s, x) -> noopHandle(calls)) < 0); |
761 |
s2.sn.request(64); |
762 |
p.close(); |
763 |
s2.awaitComplete(); |
764 |
s1.awaitComplete(); |
765 |
assertTrue(calls.get() >= 4); |
766 |
} |
767 |
|
768 |
/** |
769 |
* offer succeeds if drop handler forces request |
770 |
*/ |
771 |
public void testRecoveredHandledDroppedOffer() { |
772 |
AtomicInteger calls = new AtomicInteger(); |
773 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
774 |
basicExecutor, 4); |
775 |
TestSubscriber s1 = new TestSubscriber(); |
776 |
s1.request = false; |
777 |
TestSubscriber s2 = new TestSubscriber(); |
778 |
s2.request = false; |
779 |
p.subscribe(s1); |
780 |
p.subscribe(s2); |
781 |
s2.awaitSubscribe(); |
782 |
s1.awaitSubscribe(); |
783 |
int n = 0; |
784 |
for (int i = 1; i <= 8; ++i) { |
785 |
int d = p.offer(i, (s, x) -> reqHandle(calls, s)); |
786 |
n = n + 2 + (d < 0 ? d : 0); |
787 |
} |
788 |
p.close(); |
789 |
s2.awaitComplete(); |
790 |
s1.awaitComplete(); |
791 |
assertEquals(n, s1.nexts + s2.nexts); |
792 |
assertTrue(calls.get() >= 2); |
793 |
} |
794 |
|
795 |
/** |
796 |
* Timed offer to a publisher with no subscribers returns lag 0 |
797 |
*/ |
798 |
public void testEmptyTimedOffer() { |
799 |
SubmissionPublisher<Integer> p = basicPublisher(); |
800 |
long startTime = System.nanoTime(); |
801 |
assertEquals(0, p.offer(1, LONG_DELAY_MS, MILLISECONDS, null)); |
802 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2); |
803 |
} |
804 |
|
805 |
/** |
806 |
* Timed offer with null item or TimeUnit throws NPE |
807 |
*/ |
808 |
public void testNullTimedOffer() { |
809 |
SubmissionPublisher<Integer> p = basicPublisher(); |
810 |
long startTime = System.nanoTime(); |
811 |
try { |
812 |
p.offer(null, LONG_DELAY_MS, MILLISECONDS, null); |
813 |
shouldThrow(); |
814 |
} catch (NullPointerException success) {} |
815 |
try { |
816 |
p.offer(1, LONG_DELAY_MS, null, null); |
817 |
shouldThrow(); |
818 |
} catch (NullPointerException success) {} |
819 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2); |
820 |
} |
821 |
|
822 |
/** |
823 |
* Timed offer returns number of lagged items if not saturated |
824 |
*/ |
825 |
public void testLaggedTimedOffer() { |
826 |
SubmissionPublisher<Integer> p = basicPublisher(); |
827 |
TestSubscriber s1 = new TestSubscriber(); |
828 |
s1.request = false; |
829 |
TestSubscriber s2 = new TestSubscriber(); |
830 |
s2.request = false; |
831 |
p.subscribe(s1); |
832 |
p.subscribe(s2); |
833 |
s2.awaitSubscribe(); |
834 |
s1.awaitSubscribe(); |
835 |
long startTime = System.nanoTime(); |
836 |
assertTrue(p.offer(1, LONG_DELAY_MS, MILLISECONDS, null) >= 1); |
837 |
assertTrue(p.offer(2, LONG_DELAY_MS, MILLISECONDS, null) >= 2); |
838 |
s1.sn.request(4); |
839 |
assertTrue(p.offer(3, LONG_DELAY_MS, MILLISECONDS, null) >= 3); |
840 |
s2.sn.request(4); |
841 |
p.offer(4, LONG_DELAY_MS, MILLISECONDS, null); |
842 |
p.close(); |
843 |
s2.awaitComplete(); |
844 |
assertEquals(4, s2.nexts); |
845 |
s1.awaitComplete(); |
846 |
assertEquals(4, s2.nexts); |
847 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2); |
848 |
} |
849 |
|
850 |
/** |
851 |
* Timed offer reports drops if saturated |
852 |
*/ |
853 |
public void testDroppedTimedOffer() { |
854 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
855 |
basicExecutor, 4); |
856 |
TestSubscriber s1 = new TestSubscriber(); |
857 |
s1.request = false; |
858 |
TestSubscriber s2 = new TestSubscriber(); |
859 |
s2.request = false; |
860 |
p.subscribe(s1); |
861 |
p.subscribe(s2); |
862 |
s2.awaitSubscribe(); |
863 |
s1.awaitSubscribe(); |
864 |
long delay = timeoutMillis(); |
865 |
for (int i = 1; i <= 4; ++i) |
866 |
assertTrue(p.offer(i, delay, MILLISECONDS, null) >= 0); |
867 |
long startTime = System.nanoTime(); |
868 |
assertTrue(p.offer(5, delay, MILLISECONDS, null) < 0); |
869 |
s1.sn.request(64); |
870 |
assertTrue(p.offer(6, delay, MILLISECONDS, null) < 0); |
871 |
// 2 * delay should elapse but check only 1 * delay to allow timer slop |
872 |
assertTrue(millisElapsedSince(startTime) >= delay); |
873 |
s2.sn.request(64); |
874 |
p.close(); |
875 |
s2.awaitComplete(); |
876 |
assertTrue(s2.nexts >= 2); |
877 |
s1.awaitComplete(); |
878 |
assertTrue(s1.nexts >= 2); |
879 |
} |
880 |
|
881 |
/** |
882 |
* Timed offer invokes drop handler if saturated |
883 |
*/ |
884 |
public void testHandledDroppedTimedOffer() { |
885 |
AtomicInteger calls = new AtomicInteger(); |
886 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
887 |
basicExecutor, 4); |
888 |
TestSubscriber s1 = new TestSubscriber(); |
889 |
s1.request = false; |
890 |
TestSubscriber s2 = new TestSubscriber(); |
891 |
s2.request = false; |
892 |
p.subscribe(s1); |
893 |
p.subscribe(s2); |
894 |
s2.awaitSubscribe(); |
895 |
s1.awaitSubscribe(); |
896 |
long delay = timeoutMillis(); |
897 |
for (int i = 1; i <= 4; ++i) |
898 |
assertTrue(p.offer(i, delay, MILLISECONDS, (s, x) -> noopHandle(calls)) >= 0); |
899 |
long startTime = System.nanoTime(); |
900 |
assertTrue(p.offer(5, delay, MILLISECONDS, (s, x) -> noopHandle(calls)) < 0); |
901 |
s1.sn.request(64); |
902 |
assertTrue(p.offer(6, delay, MILLISECONDS, (s, x) -> noopHandle(calls)) < 0); |
903 |
assertTrue(millisElapsedSince(startTime) >= delay); |
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 |
long delay = timeoutMillis(); |
928 |
long startTime = System.nanoTime(); |
929 |
for (int i = 1; i <= 6; ++i) { |
930 |
int d = p.offer(i, delay, MILLISECONDS, (s, x) -> reqHandle(calls, s)); |
931 |
n = n + 2 + (d < 0 ? d : 0); |
932 |
} |
933 |
assertTrue(millisElapsedSince(startTime) >= delay); |
934 |
p.close(); |
935 |
s2.awaitComplete(); |
936 |
s1.awaitComplete(); |
937 |
assertEquals(n, s1.nexts + s2.nexts); |
938 |
assertTrue(calls.get() >= 2); |
939 |
} |
940 |
|
941 |
/** |
942 |
* consume returns a CompletableFuture that is done when |
943 |
* publisher completes |
944 |
*/ |
945 |
public void testConsume() { |
946 |
AtomicInteger sum = new AtomicInteger(); |
947 |
SubmissionPublisher<Integer> p = basicPublisher(); |
948 |
CompletableFuture<Void> f = |
949 |
p.consume((Integer x) -> { sum.getAndAdd(x.intValue()); }); |
950 |
int n = 20; |
951 |
for (int i = 1; i <= n; ++i) |
952 |
p.submit(i); |
953 |
p.close(); |
954 |
f.join(); |
955 |
assertEquals((n * (n + 1)) / 2, sum.get()); |
956 |
} |
957 |
|
958 |
/** |
959 |
* consume(null) throws NPE |
960 |
*/ |
961 |
public void testConsumeNPE() { |
962 |
SubmissionPublisher<Integer> p = basicPublisher(); |
963 |
try { |
964 |
CompletableFuture<Void> f = p.consume(null); |
965 |
shouldThrow(); |
966 |
} catch (NullPointerException success) {} |
967 |
} |
968 |
|
969 |
/** |
970 |
* consume eventually stops processing published items if cancelled |
971 |
*/ |
972 |
public void testCancelledConsume() { |
973 |
AtomicInteger count = new AtomicInteger(); |
974 |
SubmissionPublisher<Integer> p = basicPublisher(); |
975 |
CompletableFuture<Void> f = p.consume(x -> count.getAndIncrement()); |
976 |
f.cancel(true); |
977 |
int n = 1000000; // arbitrary limit |
978 |
for (int i = 1; i <= n; ++i) |
979 |
p.submit(i); |
980 |
assertTrue(count.get() < n); |
981 |
} |
982 |
|
983 |
} |