AbstractPushPublisher.java

/*
 * Copyright (c) 2016, 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.
 *
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package jdk.incubator.http;

import java.util.Optional;
import java.util.concurrent.CompletionException;
import java.util.concurrent.Flow;
import java.util.function.Consumer;

/**
 * A super class for PushPublisher implementation.
 */
abstract class AbstractPushPublisher<T> implements Flow.Publisher<T> {

    static enum SubscriptionState { OPENED, DONE, CANCELLED };

    public abstract void acceptData(Optional<T> item)
        throws InterruptedException;

    public abstract void acceptError(Throwable t);

    public Consumer<Optional<T>> asDataConsumer() {
        return this::consume;
    }

    void consume(Optional<T> item) {
        try {
            acceptData(item);
        } catch (InterruptedException x) {
            throw new CompletionException(x);
        }
    }

        }