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/*
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.nio.ByteBuffer;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.CompletionStage;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.CyclicBarrier;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.Flow.Subscription;
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import java.util.concurrent.Phaser;
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import java.util.concurrent.SubmissionPublisher;
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import java.util.function.IntSupplier;
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import java.util.stream.IntStream;
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import jdk.incubator.http.HttpResponse.BodySubscriber;
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import org.testng.annotations.DataProvider;
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import org.testng.annotations.Test;
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import static java.lang.Long.MAX_VALUE;
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import static java.lang.Long.MIN_VALUE;
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import static java.lang.System.out;
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import static java.nio.ByteBuffer.wrap;
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import static java.util.concurrent.TimeUnit.SECONDS;
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import static jdk.incubator.http.HttpResponse.BodySubscriber.buffering;
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import static org.testng.Assert.*;
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/*
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* @test
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* @summary Test for HttpResponse.BodySubscriber.buffering() onError/onComplete
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* @run testng/othervm BufferingSubscriberErrorCompleteTest
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*/
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public class BufferingSubscriberErrorCompleteTest {
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@DataProvider(name = "illegalDemand")
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public Object[][] illegalDemand() {
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return new Object[][]{
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{0L}, {-1L}, {-5L}, {-100L}, {-101L}, {-100_001L}, {MIN_VALUE}
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};
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}
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@Test(dataProvider = "illegalDemand")
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public void illegalRequest(long demand) throws Exception {
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ExecutorService executor = Executors.newFixedThreadPool(1);
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SubmissionPublisher<List<ByteBuffer>> publisher =
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new SubmissionPublisher<>(executor, 1);
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Phaser gate = new Phaser(2); // single onSubscribe and onError
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ExposingSubscriber exposingSubscriber = new ExposingSubscriber(gate);
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BodySubscriber subscriber = buffering(exposingSubscriber, 1);
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publisher.subscribe(subscriber);
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gate.arriveAndAwaitAdvance();
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Subscription s = exposingSubscriber.subscription;
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int previous = exposingSubscriber.onErrorInvocations;
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s.request(demand);
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gate.arriveAndAwaitAdvance();
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assertEquals(previous + 1, exposingSubscriber.onErrorInvocations);
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assertTrue(exposingSubscriber.throwable instanceof IllegalArgumentException,
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"Expected IAE, got:" + exposingSubscriber.throwable);
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furtherCancelsRequestsShouldBeNoOp(s);
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assertEquals(exposingSubscriber.onErrorInvocations, 1);
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executor.shutdown();
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}
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@DataProvider(name = "bufferAndItemSizes")
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public Object[][] bufferAndItemSizes() {
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List<Object[]> values = new ArrayList<>();
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for (int bufferSize : new int[] { 1, 5, 10, 100, 1000 })
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for (int items : new int[] { 0, 1, 2, 5, 9, 10, 11, 15, 29, 99 })
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values.add(new Object[] { bufferSize, items });
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return values.stream().toArray(Object[][]::new);
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}
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@Test(dataProvider = "bufferAndItemSizes")
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public void onErrorFromPublisher(int bufferSize,
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int numberOfItems)
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throws Exception
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{
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ExecutorService executor = Executors.newFixedThreadPool(1);
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SubmissionPublisher<List<ByteBuffer>> publisher =
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new SubmissionPublisher<>(executor, 1);
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// onSubscribe + onError + this thread
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Phaser gate = new Phaser(3);
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ExposingSubscriber exposingSubscriber = new ExposingSubscriber(gate);
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BodySubscriber subscriber = buffering(exposingSubscriber, bufferSize);
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publisher.subscribe(subscriber);
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List<ByteBuffer> item = List.of(wrap(new byte[] { 1 }));
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IntStream.range(0, numberOfItems).forEach(x -> publisher.submit(item));
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Throwable t = new Throwable("a message from me to me");
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publisher.closeExceptionally(t);
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gate.arriveAndAwaitAdvance();
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Subscription s = exposingSubscriber.subscription;
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assertEquals(exposingSubscriber.onErrorInvocations, 1);
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assertEquals(exposingSubscriber.onCompleteInvocations, 0);
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assertEquals(exposingSubscriber.throwable, t);
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assertEquals(exposingSubscriber.throwable.getMessage(),
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"a message from me to me");
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furtherCancelsRequestsShouldBeNoOp(s);
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assertEquals(exposingSubscriber.onErrorInvocations, 1);
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assertEquals(exposingSubscriber.onCompleteInvocations, 0);
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executor.shutdown();
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}
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@Test(dataProvider = "bufferAndItemSizes")
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public void onCompleteFromPublisher(int bufferSize,
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int numberOfItems)
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throws Exception
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{
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ExecutorService executor = Executors.newFixedThreadPool(1);
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SubmissionPublisher<List<ByteBuffer>> publisher =
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new SubmissionPublisher<>(executor, 1);
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// onSubscribe + onComplete + this thread
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Phaser gate = new Phaser(3);
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ExposingSubscriber exposingSubscriber = new ExposingSubscriber(gate);
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BodySubscriber subscriber = buffering(exposingSubscriber, bufferSize);
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publisher.subscribe(subscriber);
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List<ByteBuffer> item = List.of(wrap(new byte[] { 1 }));
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IntStream.range(0, numberOfItems).forEach(x -> publisher.submit(item));
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publisher.close();
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gate.arriveAndAwaitAdvance();
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Subscription s = exposingSubscriber.subscription;
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assertEquals(exposingSubscriber.onErrorInvocations, 0);
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assertEquals(exposingSubscriber.onCompleteInvocations, 1);
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assertEquals(exposingSubscriber.throwable, null);
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furtherCancelsRequestsShouldBeNoOp(s);
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assertEquals(exposingSubscriber.onErrorInvocations, 0);
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assertEquals(exposingSubscriber.onCompleteInvocations, 1);
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assertEquals(exposingSubscriber.throwable, null);
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executor.shutdown();
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}
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static class ExposingSubscriber implements BodySubscriber<Void> {
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final Phaser gate;
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volatile Subscription subscription;
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volatile int onNextInvocations;
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volatile int onErrorInvocations;
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volatile int onCompleteInvocations;
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volatile Throwable throwable;
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ExposingSubscriber(Phaser gate) {
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this.gate = gate;
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}
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@Override
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public void onSubscribe(Subscription subscription) {
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//out.println("onSubscribe " + subscription);
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this.subscription = subscription;
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subscription.request(MAX_VALUE);
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gate.arrive();
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}
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@Override
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public void onNext(List<ByteBuffer> item) {
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//out.println("onNext " + item);
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onNextInvocations++;
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}
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@Override
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public void onError(Throwable throwable) {
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//out.println("onError " + throwable);
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this.throwable = throwable;
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onErrorInvocations++;
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gate.arrive();
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}
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@Override
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public void onComplete() {
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//out.println("onComplete ");
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onCompleteInvocations++;
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gate.arrive();
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}
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@Override
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public CompletionStage<Void> getBody() {
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throw new UnsupportedOperationException("getBody is unsupported");
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}
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}
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static void furtherCancelsRequestsShouldBeNoOp(Subscription s) {
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s.cancel(); s.request(1);
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s.cancel(); s.request(100); s.cancel();
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s.cancel(); s.request(MAX_VALUE); s.cancel(); s.cancel();
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s.cancel(); s.cancel(); s.cancel(); s.cancel();
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s.request(MAX_VALUE); s.request(MAX_VALUE); s.request(MAX_VALUE);
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s.request(-1); s.request(-100); s.request(MIN_VALUE);
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}
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}
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