com.ibm.crail.namenode.rpc.netty.common.RequestDecoder.java Source code

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Here is the source code for com.ibm.crail.namenode.rpc.netty.common.RequestDecoder.java

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/*
 * Crail-Netty: An implementation of Crail DataNode and RPC interfaces
 *              to run on netty/TCP transport.
 *
 * Author: Animesh Trivedi <atr@zurich.ibm.com>
 *
 * Copyright (C) 2016, IBM Corporation
 *
 * Licensed 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 com.ibm.crail.namenode.rpc.netty.common;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;

import java.util.List;

public class RequestDecoder extends ByteToMessageDecoder {
    @Override
    protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List<Object> list)
            throws Exception {
        /* here we have to do the same exercise */
        if (NettyRequest.CSIZE > byteBuf.readableBytes()) {
            return;
        }
        /* otherwise decode */
        NettyRequest newReq = new NettyRequest();
        newReq.update(byteBuf);
        list.add(newReq);
    }
}