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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 |
4 |
* 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; |
12 |
import java.util.concurrent.ForkJoinPool; |
13 |
import java.util.concurrent.SubmissionPublisher; |
14 |
import java.util.concurrent.atomic.AtomicInteger; |
15 |
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.Subscriber; |
19 |
import static java.util.concurrent.Flow.Subscription; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
21 |
|
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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); |
26 |
} |
27 |
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() { |
34 |
return new SubmissionPublisher<Integer>(); |
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} |
36 |
|
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static class SPException extends RuntimeException {} |
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|
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class TestSubscriber implements Subscriber<Integer> { |
40 |
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(); |
55 |
if (request) |
56 |
sn.request(1L); |
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} |
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public synchronized void onNext(Integer t) { |
59 |
++nexts; |
60 |
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) |
65 |
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) { |
70 |
threadAssertTrue(completes == 0); |
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threadAssertTrue(errors == 0); |
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lastError = t; |
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++errors; |
74 |
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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} |
81 |
|
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synchronized void awaitSubscribe() { |
83 |
while (sn == null) { |
84 |
try { |
85 |
wait(); |
86 |
} catch (Exception ex) { |
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threadUnexpectedException(ex); |
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break; |
89 |
} |
90 |
} |
91 |
} |
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synchronized void awaitNext(int n) { |
93 |
while (nexts < n) { |
94 |
try { |
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wait(); |
96 |
} catch (Exception ex) { |
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threadUnexpectedException(ex); |
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break; |
99 |
} |
100 |
} |
101 |
} |
102 |
synchronized void awaitComplete() { |
103 |
while (completes == 0 && errors == 0) { |
104 |
try { |
105 |
wait(); |
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} catch (Exception ex) { |
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threadUnexpectedException(ex); |
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break; |
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} |
110 |
} |
111 |
} |
112 |
synchronized void awaitError() { |
113 |
while (errors == 0) { |
114 |
try { |
115 |
wait(); |
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} catch (Exception ex) { |
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threadUnexpectedException(ex); |
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break; |
119 |
} |
120 |
} |
121 |
} |
122 |
|
123 |
} |
124 |
|
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/** |
126 |
* A new SubmissionPublisher has no subscribers, a non-null |
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* executor, a power-of-two capacity, is not closed, and reports |
128 |
* zero demand and lag |
129 |
*/ |
130 |
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 |
173 |
*/ |
174 |
public void testConstructor3() { |
175 |
try { |
176 |
new SubmissionPublisher<Integer>(null, 8); |
177 |
shouldThrow(); |
178 |
} catch (NullPointerException success) {} |
179 |
} |
180 |
|
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/** |
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* A negative capacity argument to SubmissionPublisher constructor |
183 |
* throws IAE |
184 |
*/ |
185 |
public void testConstructor4() { |
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Executor e = Executors.newFixedThreadPool(1); |
187 |
try { |
188 |
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(); |
207 |
} catch (IllegalStateException success) {} |
208 |
Throwable ex = new SPException(); |
209 |
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() { |
221 |
SubmissionPublisher<Integer> p = basicPublisher(); |
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checkInitialState(p); |
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Throwable ex = new SPException(); |
224 |
p.closeExceptionally(ex); |
225 |
assertTrue(p.isClosed()); |
226 |
assertSame(p.getClosedException(), ex); |
227 |
try { |
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p.submit(1); |
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shouldThrow(); |
230 |
} catch (IllegalStateException success) {} |
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p.close(); |
232 |
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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*/ |
242 |
public void testSubscribe1() { |
243 |
TestSubscriber s = new TestSubscriber(); |
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SubmissionPublisher<Integer> p = basicPublisher(); |
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p.subscribe(s); |
246 |
assertTrue(p.hasSubscribers()); |
247 |
assertEquals(1, p.getNumberOfSubscribers()); |
248 |
assertTrue(p.getSubscribers().contains(s)); |
249 |
assertTrue(p.isSubscribed(s)); |
250 |
s.awaitSubscribe(); |
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assertNotNull(s.sn); |
252 |
assertEquals(0, s.nexts); |
253 |
assertEquals(0, s.errors); |
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assertEquals(0, s.completes); |
255 |
TestSubscriber s2 = new TestSubscriber(); |
256 |
p.subscribe(s2); |
257 |
assertTrue(p.hasSubscribers()); |
258 |
assertEquals(2, p.getNumberOfSubscribers()); |
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assertTrue(p.getSubscribers().contains(s)); |
260 |
assertTrue(p.getSubscribers().contains(s2)); |
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assertTrue(p.isSubscribed(s)); |
262 |
assertTrue(p.isSubscribed(s2)); |
263 |
s2.awaitSubscribe(); |
264 |
assertNotNull(s2.sn); |
265 |
assertEquals(0, s2.nexts); |
266 |
assertEquals(0, s2.errors); |
267 |
assertEquals(0, s2.completes); |
268 |
p.close(); |
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} |
270 |
|
271 |
/** |
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* If closed, upon subscription, the subscriber's onComplete |
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* method is invoked |
274 |
*/ |
275 |
public void testSubscribe2() { |
276 |
TestSubscriber s = new TestSubscriber(); |
277 |
SubmissionPublisher<Integer> p = basicPublisher(); |
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p.close(); |
279 |
p.subscribe(s); |
280 |
s.awaitComplete(); |
281 |
assertEquals(0, s.nexts); |
282 |
assertEquals(0, s.errors); |
283 |
assertEquals(1, s.completes, 1); |
284 |
} |
285 |
|
286 |
/** |
287 |
* If closedExceptionally, upon subscription, the subscriber's |
288 |
* onError method is invoked |
289 |
*/ |
290 |
public void testSubscribe3() { |
291 |
TestSubscriber s = new TestSubscriber(); |
292 |
SubmissionPublisher<Integer> p = basicPublisher(); |
293 |
Throwable ex = new SPException(); |
294 |
p.closeExceptionally(ex); |
295 |
assertTrue(p.isClosed()); |
296 |
assertSame(p.getClosedException(), ex); |
297 |
p.subscribe(s); |
298 |
s.awaitError(); |
299 |
assertEquals(0, s.nexts); |
300 |
assertEquals(1, s.errors); |
301 |
} |
302 |
|
303 |
/** |
304 |
* Upon attempted resubscription, the subscriber's onError is |
305 |
* called and the subscription is cancelled. |
306 |
*/ |
307 |
public void testSubscribe4() { |
308 |
TestSubscriber s = new TestSubscriber(); |
309 |
SubmissionPublisher<Integer> p = basicPublisher(); |
310 |
p.subscribe(s); |
311 |
assertTrue(p.hasSubscribers()); |
312 |
assertEquals(1, p.getNumberOfSubscribers()); |
313 |
assertTrue(p.getSubscribers().contains(s)); |
314 |
assertTrue(p.isSubscribed(s)); |
315 |
s.awaitSubscribe(); |
316 |
assertNotNull(s.sn); |
317 |
assertEquals(0, s.nexts); |
318 |
assertEquals(0, s.errors); |
319 |
assertEquals(0, s.completes); |
320 |
p.subscribe(s); |
321 |
s.awaitError(); |
322 |
assertEquals(0, s.nexts); |
323 |
assertEquals(1, s.errors); |
324 |
assertFalse(p.isSubscribed(s)); |
325 |
} |
326 |
|
327 |
/** |
328 |
* An exception thrown in onSubscribe causes onError |
329 |
*/ |
330 |
public void testSubscribe5() { |
331 |
TestSubscriber s = new TestSubscriber(); |
332 |
SubmissionPublisher<Integer> p = basicPublisher(); |
333 |
s.throwOnCall = true; |
334 |
try { |
335 |
p.subscribe(s); |
336 |
} catch (Exception ok) {} |
337 |
s.awaitError(); |
338 |
assertEquals(0, s.nexts); |
339 |
assertEquals(1, s.errors); |
340 |
assertEquals(0, s.completes); |
341 |
} |
342 |
|
343 |
/** |
344 |
* subscribe(null) throws NPE |
345 |
*/ |
346 |
public void testSubscribe6() { |
347 |
SubmissionPublisher<Integer> p = basicPublisher(); |
348 |
try { |
349 |
p.subscribe(null); |
350 |
shouldThrow(); |
351 |
} catch (NullPointerException success) {} |
352 |
checkInitialState(p); |
353 |
} |
354 |
|
355 |
/** |
356 |
* Closing a publisher causes onComplete to subscribers |
357 |
*/ |
358 |
public void testCloseCompletes() { |
359 |
SubmissionPublisher<Integer> p = basicPublisher(); |
360 |
TestSubscriber s1 = new TestSubscriber(); |
361 |
TestSubscriber s2 = new TestSubscriber(); |
362 |
p.subscribe(s1); |
363 |
p.subscribe(s2); |
364 |
p.submit(1); |
365 |
p.close(); |
366 |
assertTrue(p.isClosed()); |
367 |
assertNull(p.getClosedException()); |
368 |
s1.awaitComplete(); |
369 |
assertEquals(1, s1.nexts); |
370 |
assertEquals(1, s1.completes); |
371 |
s2.awaitComplete(); |
372 |
assertEquals(1, s2.nexts); |
373 |
assertEquals(1, s2.completes); |
374 |
} |
375 |
|
376 |
/** |
377 |
* Closing a publisher exceptionally causes onError to subscribers |
378 |
*/ |
379 |
public void testCloseExceptionallyError() { |
380 |
SubmissionPublisher<Integer> p = basicPublisher(); |
381 |
TestSubscriber s1 = new TestSubscriber(); |
382 |
TestSubscriber s2 = new TestSubscriber(); |
383 |
p.subscribe(s1); |
384 |
p.subscribe(s2); |
385 |
p.submit(1); |
386 |
p.closeExceptionally(new SPException()); |
387 |
assertTrue(p.isClosed()); |
388 |
s1.awaitError(); |
389 |
assertTrue(s1.nexts <= 1); |
390 |
assertEquals(1, s1.errors); |
391 |
s2.awaitError(); |
392 |
assertTrue(s2.nexts <= 1); |
393 |
assertEquals(1, s2.errors); |
394 |
} |
395 |
|
396 |
/** |
397 |
* Cancelling a subscription eventually causes no more onNexts to be issued |
398 |
*/ |
399 |
public void testCancel() { |
400 |
SubmissionPublisher<Integer> p = basicPublisher(); |
401 |
TestSubscriber s1 = new TestSubscriber(); |
402 |
TestSubscriber s2 = new TestSubscriber(); |
403 |
p.subscribe(s1); |
404 |
p.subscribe(s2); |
405 |
s1.awaitSubscribe(); |
406 |
p.submit(1); |
407 |
s1.sn.cancel(); |
408 |
for (int i = 2; i <= 20; ++i) |
409 |
p.submit(i); |
410 |
p.close(); |
411 |
s2.awaitComplete(); |
412 |
assertEquals(20, s2.nexts); |
413 |
assertEquals(1, s2.completes); |
414 |
assertTrue(s1.nexts < 20); |
415 |
assertFalse(p.isSubscribed(s1)); |
416 |
} |
417 |
|
418 |
/** |
419 |
* Throwing an exception in onNext causes onError |
420 |
*/ |
421 |
public void testThrowOnNext() { |
422 |
SubmissionPublisher<Integer> p = basicPublisher(); |
423 |
TestSubscriber s1 = new TestSubscriber(); |
424 |
TestSubscriber s2 = new TestSubscriber(); |
425 |
p.subscribe(s1); |
426 |
p.subscribe(s2); |
427 |
s1.awaitSubscribe(); |
428 |
p.submit(1); |
429 |
s1.throwOnCall = true; |
430 |
p.submit(2); |
431 |
p.close(); |
432 |
s2.awaitComplete(); |
433 |
assertEquals(2, s2.nexts); |
434 |
s1.awaitComplete(); |
435 |
assertEquals(1, s1.errors); |
436 |
} |
437 |
|
438 |
/** |
439 |
* If a handler is supplied in constructor, it is invoked when |
440 |
* subscriber throws an exception in onNext |
441 |
*/ |
442 |
public void testThrowOnNextHandler() { |
443 |
AtomicInteger calls = new AtomicInteger(); |
444 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer> |
445 |
(basicExecutor, 8, |
446 |
(s, e) -> calls.getAndIncrement()); |
447 |
TestSubscriber s1 = new TestSubscriber(); |
448 |
TestSubscriber s2 = new TestSubscriber(); |
449 |
p.subscribe(s1); |
450 |
p.subscribe(s2); |
451 |
s1.awaitSubscribe(); |
452 |
p.submit(1); |
453 |
s1.throwOnCall = true; |
454 |
p.submit(2); |
455 |
p.close(); |
456 |
s2.awaitComplete(); |
457 |
assertEquals(2, s2.nexts); |
458 |
assertEquals(1, s2.completes); |
459 |
s1.awaitError(); |
460 |
assertEquals(1, s1.errors); |
461 |
assertEquals(1, calls.get()); |
462 |
} |
463 |
|
464 |
/** |
465 |
* onNext items are issued in the same order to each subscriber |
466 |
*/ |
467 |
public void testOrder() { |
468 |
SubmissionPublisher<Integer> p = basicPublisher(); |
469 |
TestSubscriber s1 = new TestSubscriber(); |
470 |
TestSubscriber s2 = new TestSubscriber(); |
471 |
p.subscribe(s1); |
472 |
p.subscribe(s2); |
473 |
for (int i = 1; i <= 20; ++i) |
474 |
p.submit(i); |
475 |
p.close(); |
476 |
s2.awaitComplete(); |
477 |
s1.awaitComplete(); |
478 |
assertEquals(20, s2.nexts); |
479 |
assertEquals(1, s2.completes); |
480 |
assertEquals(20, s1.nexts); |
481 |
assertEquals(1, s1.completes); |
482 |
} |
483 |
|
484 |
/** |
485 |
* onNext is issued only if requested |
486 |
*/ |
487 |
public void testRequest1() { |
488 |
SubmissionPublisher<Integer> p = basicPublisher(); |
489 |
TestSubscriber s1 = new TestSubscriber(); |
490 |
s1.request = false; |
491 |
p.subscribe(s1); |
492 |
s1.awaitSubscribe(); |
493 |
assertTrue(p.estimateMinimumDemand() == 0); |
494 |
TestSubscriber s2 = new TestSubscriber(); |
495 |
p.subscribe(s2); |
496 |
p.submit(1); |
497 |
p.submit(2); |
498 |
s2.awaitNext(1); |
499 |
assertEquals(0, s1.nexts); |
500 |
s1.sn.request(3); |
501 |
p.submit(3); |
502 |
p.close(); |
503 |
s2.awaitComplete(); |
504 |
assertEquals(3, s2.nexts); |
505 |
assertEquals(1, s2.completes); |
506 |
s1.awaitComplete(); |
507 |
assertTrue(s1.nexts > 0); |
508 |
assertEquals(1, s1.completes); |
509 |
} |
510 |
|
511 |
/** |
512 |
* onNext is not issued when requests become zero |
513 |
*/ |
514 |
public void testRequest2() { |
515 |
SubmissionPublisher<Integer> p = basicPublisher(); |
516 |
TestSubscriber s1 = new TestSubscriber(); |
517 |
TestSubscriber s2 = new TestSubscriber(); |
518 |
p.subscribe(s1); |
519 |
p.subscribe(s2); |
520 |
s2.awaitSubscribe(); |
521 |
s1.awaitSubscribe(); |
522 |
s1.request = false; |
523 |
p.submit(1); |
524 |
p.submit(2); |
525 |
p.close(); |
526 |
s2.awaitComplete(); |
527 |
assertEquals(2, s2.nexts); |
528 |
assertEquals(1, s2.completes); |
529 |
s1.awaitNext(1); |
530 |
assertEquals(1, s1.nexts); |
531 |
} |
532 |
|
533 |
/** |
534 |
* Negative request causes error |
535 |
*/ |
536 |
public void testRequest3() { |
537 |
SubmissionPublisher<Integer> p = basicPublisher(); |
538 |
TestSubscriber s1 = new TestSubscriber(); |
539 |
TestSubscriber s2 = new TestSubscriber(); |
540 |
p.subscribe(s1); |
541 |
p.subscribe(s2); |
542 |
s2.awaitSubscribe(); |
543 |
s1.awaitSubscribe(); |
544 |
s1.sn.request(-1L); |
545 |
p.submit(1); |
546 |
p.submit(2); |
547 |
p.close(); |
548 |
s2.awaitComplete(); |
549 |
assertEquals(2, s2.nexts); |
550 |
assertEquals(1, s2.completes); |
551 |
s1.awaitError(); |
552 |
assertEquals(1, s1.errors); |
553 |
assertTrue(s1.lastError instanceof IllegalArgumentException); |
554 |
} |
555 |
|
556 |
/** |
557 |
* estimateMinimumDemand reports 0 until request, nonzero after |
558 |
* request, and zero again after delivery |
559 |
*/ |
560 |
public void testEstimateMinimumDemand() { |
561 |
TestSubscriber s = new TestSubscriber(); |
562 |
SubmissionPublisher<Integer> p = basicPublisher(); |
563 |
s.request = false; |
564 |
p.subscribe(s); |
565 |
s.awaitSubscribe(); |
566 |
assertEquals(0, p.estimateMinimumDemand()); |
567 |
s.sn.request(1); |
568 |
assertEquals(1, p.estimateMinimumDemand()); |
569 |
p.submit(1); |
570 |
s.awaitNext(1); |
571 |
assertEquals(0, p.estimateMinimumDemand()); |
572 |
} |
573 |
|
574 |
/** |
575 |
* submit to a publisher with no subscribers returns lag 0 |
576 |
*/ |
577 |
public void testEmptySubmit() { |
578 |
SubmissionPublisher<Integer> p = basicPublisher(); |
579 |
assertEquals(0, p.submit(1)); |
580 |
} |
581 |
|
582 |
/** |
583 |
* submit(null) throws NPE |
584 |
*/ |
585 |
public void testNullSubmit() { |
586 |
SubmissionPublisher<Integer> p = basicPublisher(); |
587 |
try { |
588 |
p.submit(null); |
589 |
shouldThrow(); |
590 |
} catch (NullPointerException success) {} |
591 |
} |
592 |
|
593 |
/** |
594 |
* submit returns number of lagged items, compatible with result |
595 |
* of estimateMaximumLag. |
596 |
*/ |
597 |
public void testLaggedSubmit() { |
598 |
SubmissionPublisher<Integer> p = basicPublisher(); |
599 |
TestSubscriber s1 = new TestSubscriber(); |
600 |
s1.request = false; |
601 |
TestSubscriber s2 = new TestSubscriber(); |
602 |
s2.request = false; |
603 |
p.subscribe(s1); |
604 |
p.subscribe(s2); |
605 |
s2.awaitSubscribe(); |
606 |
s1.awaitSubscribe(); |
607 |
assertEquals(1, p.submit(1)); |
608 |
assertTrue(p.estimateMaximumLag() >= 1); |
609 |
assertTrue(p.submit(2) >= 2); |
610 |
assertTrue(p.estimateMaximumLag() >= 2); |
611 |
s1.sn.request(4); |
612 |
assertTrue(p.submit(3) >= 3); |
613 |
assertTrue(p.estimateMaximumLag() >= 3); |
614 |
s2.sn.request(4); |
615 |
p.submit(4); |
616 |
p.close(); |
617 |
s2.awaitComplete(); |
618 |
assertEquals(4, s2.nexts); |
619 |
s1.awaitComplete(); |
620 |
assertEquals(4, s2.nexts); |
621 |
} |
622 |
|
623 |
/** |
624 |
* submit eventually issues requested items when buffer capacity is 1 |
625 |
*/ |
626 |
public void testCap1Submit() { |
627 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
628 |
basicExecutor, 1); |
629 |
TestSubscriber s1 = new TestSubscriber(); |
630 |
TestSubscriber s2 = new TestSubscriber(); |
631 |
p.subscribe(s1); |
632 |
p.subscribe(s2); |
633 |
for (int i = 1; i <= 20; ++i) { |
634 |
assertTrue(p.estimateMinimumDemand() <= 1); |
635 |
assertTrue(p.submit(i) >= 0); |
636 |
} |
637 |
p.close(); |
638 |
s2.awaitComplete(); |
639 |
s1.awaitComplete(); |
640 |
assertEquals(20, s2.nexts); |
641 |
assertEquals(1, s2.completes); |
642 |
assertEquals(20, s1.nexts); |
643 |
assertEquals(1, s1.completes); |
644 |
} |
645 |
|
646 |
static boolean noopHandle(AtomicInteger count) { |
647 |
count.getAndIncrement(); |
648 |
return false; |
649 |
} |
650 |
|
651 |
static boolean reqHandle(AtomicInteger count, Subscriber s) { |
652 |
count.getAndIncrement(); |
653 |
((TestSubscriber)s).sn.request(Long.MAX_VALUE); |
654 |
return true; |
655 |
} |
656 |
|
657 |
/** |
658 |
* offer to a publisher with no subscribers returns lag 0 |
659 |
*/ |
660 |
public void testEmptyOffer() { |
661 |
SubmissionPublisher<Integer> p = basicPublisher(); |
662 |
assertEquals(0, p.offer(1, null)); |
663 |
} |
664 |
|
665 |
/** |
666 |
* offer(null) throws NPE |
667 |
*/ |
668 |
public void testNullOffer() { |
669 |
SubmissionPublisher<Integer> p = basicPublisher(); |
670 |
try { |
671 |
p.offer(null, null); |
672 |
shouldThrow(); |
673 |
} catch (NullPointerException success) {} |
674 |
} |
675 |
|
676 |
/** |
677 |
* offer returns number of lagged items if not saturated |
678 |
*/ |
679 |
public void testLaggedOffer() { |
680 |
SubmissionPublisher<Integer> p = basicPublisher(); |
681 |
TestSubscriber s1 = new TestSubscriber(); |
682 |
s1.request = false; |
683 |
TestSubscriber s2 = new TestSubscriber(); |
684 |
s2.request = false; |
685 |
p.subscribe(s1); |
686 |
p.subscribe(s2); |
687 |
s2.awaitSubscribe(); |
688 |
s1.awaitSubscribe(); |
689 |
assertTrue(p.offer(1, null) >= 1); |
690 |
assertTrue(p.offer(2, null) >= 2); |
691 |
s1.sn.request(4); |
692 |
assertTrue(p.offer(3, null) >= 3); |
693 |
s2.sn.request(4); |
694 |
p.offer(4, null); |
695 |
p.close(); |
696 |
s2.awaitComplete(); |
697 |
assertEquals(4, s2.nexts); |
698 |
s1.awaitComplete(); |
699 |
assertEquals(4, s2.nexts); |
700 |
} |
701 |
|
702 |
/** |
703 |
* offer reports drops if saturated |
704 |
*/ |
705 |
public void testDroppedOffer() { |
706 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
707 |
basicExecutor, 4); |
708 |
TestSubscriber s1 = new TestSubscriber(); |
709 |
s1.request = false; |
710 |
TestSubscriber s2 = new TestSubscriber(); |
711 |
s2.request = false; |
712 |
p.subscribe(s1); |
713 |
p.subscribe(s2); |
714 |
s2.awaitSubscribe(); |
715 |
s1.awaitSubscribe(); |
716 |
for (int i = 1; i <= 4; ++i) |
717 |
assertTrue(p.offer(i, null) >= 0); |
718 |
p.offer(5, null); |
719 |
assertTrue(p.offer(6, null) < 0); |
720 |
s1.sn.request(64); |
721 |
assertTrue(p.offer(7, null) < 0); |
722 |
s2.sn.request(64); |
723 |
p.close(); |
724 |
s2.awaitComplete(); |
725 |
assertTrue(s2.nexts >= 4); |
726 |
s1.awaitComplete(); |
727 |
assertTrue(s1.nexts >= 4); |
728 |
} |
729 |
|
730 |
/** |
731 |
* offer invokes drop handler if saturated |
732 |
*/ |
733 |
public void testHandledDroppedOffer() { |
734 |
AtomicInteger calls = new AtomicInteger(); |
735 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
736 |
basicExecutor, 4); |
737 |
TestSubscriber s1 = new TestSubscriber(); |
738 |
s1.request = false; |
739 |
TestSubscriber s2 = new TestSubscriber(); |
740 |
s2.request = false; |
741 |
p.subscribe(s1); |
742 |
p.subscribe(s2); |
743 |
s2.awaitSubscribe(); |
744 |
s1.awaitSubscribe(); |
745 |
for (int i = 1; i <= 4; ++i) |
746 |
assertTrue(p.offer(i, (s, x) -> noopHandle(calls)) >= 0); |
747 |
p.offer(4, (s, x) -> noopHandle(calls)); |
748 |
assertTrue(p.offer(6, (s, x) -> noopHandle(calls)) < 0); |
749 |
s1.sn.request(64); |
750 |
assertTrue(p.offer(7, (s, x) -> noopHandle(calls)) < 0); |
751 |
s2.sn.request(64); |
752 |
p.close(); |
753 |
s2.awaitComplete(); |
754 |
s1.awaitComplete(); |
755 |
assertTrue(calls.get() >= 4); |
756 |
} |
757 |
|
758 |
/** |
759 |
* offer succeeds if drop handler forces request |
760 |
*/ |
761 |
public void testRecoveredHandledDroppedOffer() { |
762 |
AtomicInteger calls = new AtomicInteger(); |
763 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
764 |
basicExecutor, 4); |
765 |
TestSubscriber s1 = new TestSubscriber(); |
766 |
s1.request = false; |
767 |
TestSubscriber s2 = new TestSubscriber(); |
768 |
s2.request = false; |
769 |
p.subscribe(s1); |
770 |
p.subscribe(s2); |
771 |
s2.awaitSubscribe(); |
772 |
s1.awaitSubscribe(); |
773 |
int n = 0; |
774 |
for (int i = 1; i <= 8; ++i) { |
775 |
int d = p.offer(i, (s, x) -> reqHandle(calls, s)); |
776 |
n = n + 2 + (d < 0 ? d : 0); |
777 |
} |
778 |
p.close(); |
779 |
s2.awaitComplete(); |
780 |
s1.awaitComplete(); |
781 |
assertEquals(n, s1.nexts + s2.nexts); |
782 |
assertTrue(calls.get() >= 2); |
783 |
} |
784 |
|
785 |
/** |
786 |
* Timed offer to a publisher with no subscribers returns lag 0 |
787 |
*/ |
788 |
public void testEmptyTimedOffer() { |
789 |
SubmissionPublisher<Integer> p = basicPublisher(); |
790 |
long startTime = System.nanoTime(); |
791 |
assertEquals(0, p.offer(1, LONG_DELAY_MS, MILLISECONDS, null)); |
792 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2); |
793 |
} |
794 |
|
795 |
/** |
796 |
* Timed offer with null item or TimeUnit throws NPE |
797 |
*/ |
798 |
public void testNullTimedOffer() { |
799 |
SubmissionPublisher<Integer> p = basicPublisher(); |
800 |
long startTime = System.nanoTime(); |
801 |
try { |
802 |
p.offer(null, LONG_DELAY_MS, MILLISECONDS, null); |
803 |
shouldThrow(); |
804 |
} catch (NullPointerException success) {} |
805 |
try { |
806 |
p.offer(1, LONG_DELAY_MS, null, null); |
807 |
shouldThrow(); |
808 |
} catch (NullPointerException success) {} |
809 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2); |
810 |
} |
811 |
|
812 |
/** |
813 |
* Timed offer returns number of lagged items if not saturated |
814 |
*/ |
815 |
public void testLaggedTimedOffer() { |
816 |
SubmissionPublisher<Integer> p = basicPublisher(); |
817 |
TestSubscriber s1 = new TestSubscriber(); |
818 |
s1.request = false; |
819 |
TestSubscriber s2 = new TestSubscriber(); |
820 |
s2.request = false; |
821 |
p.subscribe(s1); |
822 |
p.subscribe(s2); |
823 |
s2.awaitSubscribe(); |
824 |
s1.awaitSubscribe(); |
825 |
long startTime = System.nanoTime(); |
826 |
assertTrue(p.offer(1, LONG_DELAY_MS, MILLISECONDS, null) >= 1); |
827 |
assertTrue(p.offer(2, LONG_DELAY_MS, MILLISECONDS, null) >= 2); |
828 |
s1.sn.request(4); |
829 |
assertTrue(p.offer(3, LONG_DELAY_MS, MILLISECONDS, null) >= 3); |
830 |
s2.sn.request(4); |
831 |
p.offer(4, LONG_DELAY_MS, MILLISECONDS, null); |
832 |
p.close(); |
833 |
s2.awaitComplete(); |
834 |
assertEquals(4, s2.nexts); |
835 |
s1.awaitComplete(); |
836 |
assertEquals(4, s2.nexts); |
837 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS / 2); |
838 |
} |
839 |
|
840 |
/** |
841 |
* Timed offer reports drops if saturated |
842 |
*/ |
843 |
public void testDroppedTimedOffer() { |
844 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
845 |
basicExecutor, 4); |
846 |
TestSubscriber s1 = new TestSubscriber(); |
847 |
s1.request = false; |
848 |
TestSubscriber s2 = new TestSubscriber(); |
849 |
s2.request = false; |
850 |
p.subscribe(s1); |
851 |
p.subscribe(s2); |
852 |
s2.awaitSubscribe(); |
853 |
s1.awaitSubscribe(); |
854 |
long delay = timeoutMillis(); |
855 |
for (int i = 1; i <= 4; ++i) |
856 |
assertTrue(p.offer(i, delay, MILLISECONDS, null) >= 0); |
857 |
long startTime = System.nanoTime(); |
858 |
assertTrue(p.offer(5, delay, MILLISECONDS, null) < 0); |
859 |
s1.sn.request(64); |
860 |
assertTrue(p.offer(6, delay, MILLISECONDS, null) < 0); |
861 |
// 2 * delay should elapse but check only 1 * delay to allow timer slop |
862 |
assertTrue(millisElapsedSince(startTime) >= delay); |
863 |
s2.sn.request(64); |
864 |
p.close(); |
865 |
s2.awaitComplete(); |
866 |
assertTrue(s2.nexts >= 2); |
867 |
s1.awaitComplete(); |
868 |
assertTrue(s1.nexts >= 2); |
869 |
} |
870 |
|
871 |
/** |
872 |
* Timed offer invokes drop handler if saturated |
873 |
*/ |
874 |
public void testHandledDroppedTimedOffer() { |
875 |
AtomicInteger calls = new AtomicInteger(); |
876 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
877 |
basicExecutor, 4); |
878 |
TestSubscriber s1 = new TestSubscriber(); |
879 |
s1.request = false; |
880 |
TestSubscriber s2 = new TestSubscriber(); |
881 |
s2.request = false; |
882 |
p.subscribe(s1); |
883 |
p.subscribe(s2); |
884 |
s2.awaitSubscribe(); |
885 |
s1.awaitSubscribe(); |
886 |
long delay = timeoutMillis(); |
887 |
for (int i = 1; i <= 4; ++i) |
888 |
assertTrue(p.offer(i, delay, MILLISECONDS, (s, x) -> noopHandle(calls)) >= 0); |
889 |
long startTime = System.nanoTime(); |
890 |
assertTrue(p.offer(5, delay, MILLISECONDS, (s, x) -> noopHandle(calls)) < 0); |
891 |
s1.sn.request(64); |
892 |
assertTrue(p.offer(6, delay, MILLISECONDS, (s, x) -> noopHandle(calls)) < 0); |
893 |
assertTrue(millisElapsedSince(startTime) >= delay); |
894 |
s2.sn.request(64); |
895 |
p.close(); |
896 |
s2.awaitComplete(); |
897 |
s1.awaitComplete(); |
898 |
assertTrue(calls.get() >= 2); |
899 |
} |
900 |
|
901 |
/** |
902 |
* Timed offer succeeds if drop handler forces request |
903 |
*/ |
904 |
public void testRecoveredHandledDroppedTimedOffer() { |
905 |
AtomicInteger calls = new AtomicInteger(); |
906 |
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>( |
907 |
basicExecutor, 4); |
908 |
TestSubscriber s1 = new TestSubscriber(); |
909 |
s1.request = false; |
910 |
TestSubscriber s2 = new TestSubscriber(); |
911 |
s2.request = false; |
912 |
p.subscribe(s1); |
913 |
p.subscribe(s2); |
914 |
s2.awaitSubscribe(); |
915 |
s1.awaitSubscribe(); |
916 |
int n = 0; |
917 |
long delay = timeoutMillis(); |
918 |
long startTime = System.nanoTime(); |
919 |
for (int i = 1; i <= 6; ++i) { |
920 |
int d = p.offer(i, delay, MILLISECONDS, (s, x) -> reqHandle(calls, s)); |
921 |
n = n + 2 + (d < 0 ? d : 0); |
922 |
} |
923 |
assertTrue(millisElapsedSince(startTime) >= delay); |
924 |
p.close(); |
925 |
s2.awaitComplete(); |
926 |
s1.awaitComplete(); |
927 |
assertEquals(n, s1.nexts + s2.nexts); |
928 |
assertTrue(calls.get() >= 2); |
929 |
} |
930 |
|
931 |
/** |
932 |
* consume returns a CompletableFuture that is done when |
933 |
* publisher completes |
934 |
*/ |
935 |
public void testConsume() { |
936 |
AtomicInteger sum = new AtomicInteger(); |
937 |
SubmissionPublisher<Integer> p = basicPublisher(); |
938 |
CompletableFuture<Void> f = |
939 |
p.consume((Integer x) -> { sum.getAndAdd(x.intValue()); }); |
940 |
int n = 20; |
941 |
for (int i = 1; i <= n; ++i) |
942 |
p.submit(i); |
943 |
p.close(); |
944 |
f.join(); |
945 |
assertEquals((n * (n + 1)) / 2, sum.get()); |
946 |
} |
947 |
|
948 |
/** |
949 |
* consume(null) throws NPE |
950 |
*/ |
951 |
public void testConsumeNPE() { |
952 |
SubmissionPublisher<Integer> p = basicPublisher(); |
953 |
try { |
954 |
CompletableFuture<Void> f = p.consume(null); |
955 |
shouldThrow(); |
956 |
} catch (NullPointerException success) {} |
957 |
} |
958 |
|
959 |
/** |
960 |
* consume eventually stops processing published items if cancelled |
961 |
*/ |
962 |
public void testCancelledConsume() { |
963 |
AtomicInteger count = new AtomicInteger(); |
964 |
SubmissionPublisher<Integer> p = basicPublisher(); |
965 |
CompletableFuture<Void> f = p.consume(x -> count.getAndIncrement()); |
966 |
f.cancel(true); |
967 |
int n = 1000000; // arbitrary limit |
968 |
for (int i = 1; i <= n; ++i) |
969 |
p.submit(i); |
970 |
assertTrue(count.get() < n); |
971 |
} |
972 |
|
973 |
} |