org.testifyproject.netty.channel.epoll.EpollRecvByteAllocatorStreamingHandle Maven / Gradle / Ivy

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/*
 * Copyright 2015 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in org.testifyproject.testifyprojectpliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org.testifyproject/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package org.testifyproject.testifyproject.netty.channel.epoll;

import org.testifyproject.testifyproject.netty.channel.RecvByteBufAllocator;

/**
 * EPOLL must read until no more data is available while in edge triggered mode. This class will always continue reading
 * unless the last read did not fill up the available buffer space.
 */
final class EpollRecvByteAllocatorStreamingHandle extends EpollRecvByteAllocatorHandle {
    public EpollRecvByteAllocatorStreamingHandle(RecvByteBufAllocator.Handle handle, boolean isEdgeTriggered) {
        super(handle, isEdgeTriggered);
    }

    @Override
    public boolean continueReading() {
        /**
         * if edgeTriggered is used we need to read all bytes/messages as we are not notified again otherwise.
         * For stream oriented org.testifyproject.testifyprojectscriptors we can assume we are done reading if the last read attempt didn't produce
         * a full buffer (see Q9 in epoll man).
         *
         * If EPOLLRDHUP has been received we must read until we get a read error.
         */
        return isRdHup() ? true :
                           isEdgeTriggered() ? lastBytesRead() == attemptedBytesRead() : super.continueReading();
    }
}