ChunkedNioStream.java — netty Source File

Source Code

/*
 * Copyright 2012 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.handler.stream;

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

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.channel.ChannelHandlerContext;

import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;

/**
 * A {@link ChunkedInput} that fetches data from a {@link ReadableByteChannel}
 * chunk by chunk.  Please note that the {@link ReadableByteChannel} must
 * operate in blocking mode.  Non-blocking mode channels are not supported.
 */
public class ChunkedNioStream implements ChunkedInput<ByteBuf> {

    private final ReadableByteChannel in;

    private final int chunkSize;
    private long offset;

    /**
     * Associated ByteBuffer
     */
    private final ByteBuffer byteBuffer;

    /**
     * Creates a new instance that fetches data from the specified channel.
     */
    public ChunkedNioStream(ReadableByteChannel in) {
        this(in, ChunkedStream.DEFAULT_CHUNK_SIZE);
    }

    /**
     * Creates a new instance that fetches data from the specified channel.
     *
     * @param chunkSize the number of bytes to fetch on each
     *                  {@link #readChunk(ChannelHandlerContext)} call
     */
    public ChunkedNioStream(ReadableByteChannel in, int chunkSize) {
        this.in = checkNotNull(in, "in");
        this.chunkSize = checkPositive(chunkSize, "chunkSize");
// ... (84 more lines)