--- a/src/java.net.http/share/classes/java/net/http/internal/common/FlowTube.java Wed Feb 07 15:46:30 2018 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,185 +0,0 @@
-/*
- * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package java.net.http.internal.common;
-
-import java.nio.ByteBuffer;
-import java.util.List;
-import java.util.concurrent.Flow;
-
-/**
- * FlowTube is an I/O abstraction that allows reading from and writing to a
- * destination asynchronously.
- * This is not a {@link Flow.Processor
- * Flow.Processor<List<ByteBuffer>, List<ByteBuffer>>},
- * but rather models a publisher source and a subscriber sink in a bidirectional flow.
- * <p>
- * The {@code connectFlows} method should be called to connect the bidirectional
- * flow. A FlowTube supports handing over the same read subscription to different
- * sequential read subscribers over time. When {@code connectFlows(writePublisher,
- * readSubscriber} is called, the FlowTube will call {@code dropSubscription} on
- * its former readSubscriber, and {@code onSubscribe} on its new readSubscriber.
- */
-public interface FlowTube extends
- Flow.Publisher<List<ByteBuffer>>,
- Flow.Subscriber<List<ByteBuffer>> {
-
- /**
- * A subscriber for reading from the bidirectional flow.
- * A TubeSubscriber is a {@code Flow.Subscriber} that can be canceled
- * by calling {@code dropSubscription()}.
- * Once {@code dropSubscription()} is called, the {@code TubeSubscriber}
- * should stop calling any method on its subscription.
- */
- static interface TubeSubscriber extends Flow.Subscriber<List<ByteBuffer>> {
-
- /**
- * Called when the flow is connected again, and the subscription
- * is handed over to a new subscriber.
- * Once {@code dropSubscription()} is called, the {@code TubeSubscriber}
- * should stop calling any method on its subscription.
- */
- default void dropSubscription() { }
-
- }
-
- /**
- * A publisher for writing to the bidirectional flow.
- */
- static interface TubePublisher extends Flow.Publisher<List<ByteBuffer>> {
-
- }
-
- /**
- * Connects the bidirectional flows to a write {@code Publisher} and a
- * read {@code Subscriber}. This method can be called sequentially
- * several times to switch existing publishers and subscribers to a new
- * pair of write subscriber and read publisher.
- * @param writePublisher A new publisher for writing to the bidirectional flow.
- * @param readSubscriber A new subscriber for reading from the bidirectional
- * flow.
- */
- default void connectFlows(TubePublisher writePublisher,
- TubeSubscriber readSubscriber) {
-
- this.subscribe(readSubscriber);
- writePublisher.subscribe(this);
- }
-
- /**
- * Returns true if this flow was completed, either exceptionally
- * or normally (EOF reached).
- * @return true if the flow is finished
- */
- boolean isFinished();
-
-
- /**
- * Returns {@code s} if {@code s} is a {@code TubeSubscriber}, otherwise
- * wraps it in a {@code TubeSubscriber}.
- * Using the wrapper is only appropriate in the case where
- * {@code dropSubscription} doesn't need to be implemented, and the
- * {@code TubeSubscriber} is subscribed only once.
- *
- * @param s a subscriber for reading.
- * @return a {@code TubeSubscriber}: either {@code s} if {@code s} is a
- * {@code TubeSubscriber}, otherwise a {@code TubeSubscriber}
- * wrapper that delegates to {@code s}
- */
- static TubeSubscriber asTubeSubscriber(Flow.Subscriber<? super List<ByteBuffer>> s) {
- if (s instanceof TubeSubscriber) {
- return (TubeSubscriber) s;
- }
- return new AbstractTubeSubscriber.TubeSubscriberWrapper(s);
- }
-
- /**
- * Returns {@code s} if {@code s} is a {@code TubePublisher}, otherwise
- * wraps it in a {@code TubePublisher}.
- *
- * @param p a publisher for writing.
- * @return a {@code TubePublisher}: either {@code s} if {@code s} is a
- * {@code TubePublisher}, otherwise a {@code TubePublisher}
- * wrapper that delegates to {@code s}
- */
- static TubePublisher asTubePublisher(Flow.Publisher<List<ByteBuffer>> p) {
- if (p instanceof TubePublisher) {
- return (TubePublisher) p;
- }
- return new AbstractTubePublisher.TubePublisherWrapper(p);
- }
-
- /**
- * Convenience abstract class for {@code TubePublisher} implementations.
- * It is not required that a {@code TubePublisher} implementation extends
- * this class.
- */
- static abstract class AbstractTubePublisher implements TubePublisher {
- static final class TubePublisherWrapper extends AbstractTubePublisher {
- final Flow.Publisher<List<ByteBuffer>> delegate;
- public TubePublisherWrapper(Flow.Publisher<List<ByteBuffer>> delegate) {
- this.delegate = delegate;
- }
- @Override
- public void subscribe(Flow.Subscriber<? super List<ByteBuffer>> subscriber) {
- delegate.subscribe(subscriber);
- }
- }
- }
-
- /**
- * Convenience abstract class for {@code TubeSubscriber} implementations.
- * It is not required that a {@code TubeSubscriber} implementation extends
- * this class.
- */
- static abstract class AbstractTubeSubscriber implements TubeSubscriber {
- static final class TubeSubscriberWrapper extends AbstractTubeSubscriber {
- final Flow.Subscriber<? super List<ByteBuffer>> delegate;
- TubeSubscriberWrapper(Flow.Subscriber<? super List<ByteBuffer>> delegate) {
- this.delegate = delegate;
- }
- @Override
- public void dropSubscription() {}
- @Override
- public void onSubscribe(Flow.Subscription subscription) {
- delegate.onSubscribe(subscription);
- }
- @Override
- public void onNext(List<ByteBuffer> item) {
- delegate.onNext(item);
- }
- @Override
- public void onError(Throwable throwable) {
- delegate.onError(throwable);
- }
- @Override
- public void onComplete() {
- delegate.onComplete();
- }
- }
-
- }
-
-}