package com.zy.acs.gateway.handler.coder;
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import com.zy.acs.framework.common.RadixTools;
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import com.zy.acs.common.utils.Utils;
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import com.zy.acs.gateway.config.SystemProperties;
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import com.zy.acs.gateway.constant.PackagePart;
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import com.zy.acs.gateway.domain.AgvPackage;
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import com.zy.acs.gateway.utils.ValidUtil;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufUtil;
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import io.netty.channel.ChannelHandler;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.handler.codec.MessageToByteEncoder;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Component;
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/**
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* 编码器
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* 此解码器将会生成校验码
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* 处理方式: 异或和
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* Created by vincent on 2019-04-02
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*/
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@Component
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@ChannelHandler.Sharable
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public class ProtocolEncoder extends MessageToByteEncoder<Object> {
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private static final Logger log = LoggerFactory.getLogger(ProtocolEncoder.class);
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@Autowired
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private SystemProperties systemProperties;
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@Override
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protected void encode(ChannelHandlerContext ctx, Object obj, ByteBuf out) {
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if (obj instanceof ByteBuf){
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out.writeBytes((ByteBuf) obj);
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} else if (obj instanceof byte[]){
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out.writeBytes((byte[]) obj);
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} else if (obj instanceof AgvPackage){
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AgvPackage pac = (AgvPackage)obj;
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byte[] bodyBytes = pac.getBody().getMessageBody().writeToBytes(); // body
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String uniqueNo = pac.getHeader().getUniqueNo();
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byte[] uniquenoBytes = RadixTools.intToBytes(Integer.parseInt(pac.getHeader().getUniqueNo())); // uniqueno
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int len = PackagePart.UNIQUENO.getLen() // len
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+ PackagePart.TIMESTAMP.getLen()
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+ PackagePart.COMMAND_MARK.getLen()
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+ bodyBytes.length;
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out.writeByte(pac.getHeader().getStartSymbol()) // symbol
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.writeShortLE(len)
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.writeBytes(Utils.reverse(uniquenoBytes)) // uniqueno
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.writeIntLE((int) (System.currentTimeMillis() / 1000)) // timestamp
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.writeByte(pac.getHeader().getProtocolType().getCode()) // type
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.writeBytes(bodyBytes) // body
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.writeShort(pac.getValidCode()) // valid
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;
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pac.setValidCode(ValidUtil.calculateValidByteFromBuff(out));
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out.resetReaderIndex();
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out.writerIndex(out.readableBytes() - 2);
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out.writeShortLE(pac.getValidCode());
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if (systemProperties.isPrintPacLog()){
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log.info("Agv [{}] 下行 [{}] >>> {}", uniqueNo, pac.getHeader().getProtocolType().getDes(), ByteBufUtil.hexDump(out).toUpperCase());
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}
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}
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}
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// EE | 11 00 | 01 00 00 00 | 0C AB 12 64 | F0 | 01 00 | 01 01 | 00 00 00 00 | 4C F7
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// # | len | uniqueno | timestamp | cmd | content | crc
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}
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