org.apache.reef.wake.remote.transport.netty.NettyChannelInitializer.java Source code

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Here is the source code for org.apache.reef.wake.remote.transport.netty.NettyChannelInitializer.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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
 *
 *   http://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 org.apache.reef.wake.remote.transport.netty;

import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import io.netty.handler.codec.LengthFieldPrepender;
import io.netty.handler.codec.bytes.ByteArrayDecoder;
import io.netty.handler.codec.bytes.ByteArrayEncoder;

/**
 * Netty channel initializer for Transport
 * <p/>
 * MAXFRAMELENGTH : the buffer size of the frame decoder
 */
class NettyChannelInitializer extends ChannelInitializer<SocketChannel> {

    public static final int MAXFRAMELENGTH = 10 * 1024 * 1024;
    private final NettyChannelHandlerFactory handlerFactory;

    public NettyChannelInitializer(final NettyChannelHandlerFactory handlerFactory) {
        this.handlerFactory = handlerFactory;
    }

    @Override
    protected void initChannel(SocketChannel ch) throws Exception {
        ch.pipeline().addLast("frameDecoder", new LengthFieldBasedFrameDecoder(MAXFRAMELENGTH, 0, 4, 0, 4))
                .addLast("bytesDecoder", new ByteArrayDecoder())
                .addLast("frameEncoder", new LengthFieldPrepender(4))
                .addLast("bytesEncoder", new ByteArrayEncoder()).addLast("chunker", new ChunkedReadWriteHandler())
                .addLast("handler", handlerFactory.createChannelInboundHandler());
    }
}