DefaultMaxMessagesRecvByteBufAllocator.java — netty Source File

Source Code

/*
 * 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 compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/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 io.netty.channel;

import static io.netty.util.internal.ObjectUtil.checkPositive;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.util.UncheckedBooleanSupplier;

/**
 * Default implementation of {@link MaxMessagesRecvByteBufAllocator} which respects {@link ChannelConfig#isAutoRead()}
 * and also prevents overflow.
 */
public abstract class DefaultMaxMessagesRecvByteBufAllocator implements MaxMessagesRecvByteBufAllocator {
    private final boolean ignoreBytesRead;
    private volatile int maxMessagesPerRead;
    private volatile boolean respectMaybeMoreData = true;

    public DefaultMaxMessagesRecvByteBufAllocator() {
        this(1);
    }

    public DefaultMaxMessagesRecvByteBufAllocator(int maxMessagesPerRead) {
        this(maxMessagesPerRead, false);
    }

    DefaultMaxMessagesRecvByteBufAllocator(int maxMessagesPerRead, boolean ignoreBytesRead) {
        this.ignoreBytesRead = ignoreBytesRead;
        maxMessagesPerRead(maxMessagesPerRead);
    }

    @Override
    public int maxMessagesPerRead() {
        return maxMessagesPerRead;
    }

    @Override
    public MaxMessagesRecvByteBufAllocator maxMessagesPerRead(int maxMessagesPerRead) {
        checkPositive(maxMessagesPerRead, "maxMessagesPerRead");
        this.maxMessagesPerRead = maxMessagesPerRead;
        return this;
    }

    /**
     * Determine if future instances of {@link #newHandle()} will stop reading if we think there is no more data.
     * @param respectMaybeMoreData
// ... (112 more lines)