com.github.linshenkx.rpcnettycommon.codec.decode.RemotingTransporterDecoder Maven / Gradle / Ivy

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package com.github.linshenkx.rpcnettycommon.codec.decode;

import com.github.linshenkx.rpcnettycommon.bean.BodyContent;
import com.github.linshenkx.rpcnettycommon.bean.RpcRequest;
import com.github.linshenkx.rpcnettycommon.bean.RpcResponse;
import com.github.linshenkx.rpcnettycommon.exception.remoting.RemotingContextException;
import com.github.linshenkx.rpcnettycommon.protocal.xuan.RemotingTransporter;
import com.github.linshenkx.rpcnettycommon.serialization.SerializeTypeEnum;
import com.github.linshenkx.rpcnettycommon.serialization.SerializerEngine;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ReplayingDecoder;
import lombok.extern.log4j.Log4j2;

import java.util.List;

/**
 * @version V1.0
 * @author: lin_shen
 * @date: 18-11-12
 * @Description: TODO
 */
@Log4j2
public class RemotingTransporterDecoder extends ReplayingDecoder {

    private static final int MAX_BODY_SIZE = 1024 * 1024 * 5;

    /**
     * 用于暂存解码RemotingTransporter信息,一个就够了
     */
    private static RemotingTransporter remotingTransporter=RemotingTransporter.builder().build();

    /**
     * 用于ReplayingDecoder的状态管理
     */
    enum State {
        HEADER_MAGIC, HEADER_FLAG, HEADER_INVOKE_ID, HEADER_BODY_LENGTH, BODY
    }

    public RemotingTransporterDecoder( ){
        //设置 state() 的初始值,以便进入switch
        super(State.HEADER_MAGIC);
    }

    @Override
    protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List