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package com.zhehekeji.web.service;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
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import lombok.extern.slf4j.Slf4j;
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import java.nio.charset.Charset;
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import java.util.concurrent.ThreadPoolExecutor;
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@Slf4j
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public class MyProtocolDecoder extends LengthFieldBasedFrameDecoder {
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private ThreadPoolExecutor threadPoolExecutor;
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private OrderService orderService;
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/**
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*
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* @param maxFrameLength 帧的最大长度
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* @param lengthFieldOffset length字段偏移的地址
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* @param lengthFieldLength length字段所占的字节长
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* @param lengthAdjustment 修改帧数据长度字段中定义的值，可以为负数 因为有时候我们习惯把头部记入长度,若为负数,则说明要推后多少个字段
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* @param initialBytesToStrip 解析时候跳过多少个长度
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* @param failFast 为true，当frame长度超过maxFrameLength时立即报TooLongFrameException异常，为false，读取完整个帧再报异
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*/
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public MyProtocolDecoder(int maxFrameLength, int lengthFieldOffset, int lengthFieldLength, int lengthAdjustment, int initialBytesToStrip, boolean failFast, ThreadPoolExecutor threadPoolExecutor, OrderService orderService) {
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super(maxFrameLength, lengthFieldOffset, lengthFieldLength, lengthAdjustment, initialBytesToStrip, failFast);
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this.threadPoolExecutor = threadPoolExecutor;
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this.orderService = orderService;
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}
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@Override
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protected Object decode(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
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in = (ByteBuf) super.decode(ctx,in);
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if(in == null){
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return null;
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}
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//包头 `L` `P`
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char l = in.readChar();
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char p = in.readChar();
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if(l != 76 && p != 80){
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//不是包头 丢
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return null;
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}
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short length = in.readShort();
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log.debug("length:{}",length);
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CharSequence charSequence = in.readCharSequence(6, Charset.defaultCharset());
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String plcId = charSequence.toString();
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log.debug("plcId:{}",plcId);
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// OA=心跳 OB=工单 OC=任务 OD=告警
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CharSequence charSequence1 = in.readCharSequence(2,Charset.defaultCharset());
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String type = charSequence1.toString();
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log.debug("type:{}",type);
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CharSequence charSequence2 = in.readCharSequence(20,Charset.defaultCharset());
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String orderNum = charSequence2.toString();
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log.debug("订单号:{}",orderNum);
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char maohao = in.readChar();
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log.debug("冒号：{}",maohao);
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char leixing = in.readChar();
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log.debug("---{}",leixing);
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in.readBytes(8);
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// //读取type字段
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// byte header1 = in.readByte();
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// byte header2 = in.readByte();
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// byte header3 = in.readByte();
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// byte header4 = in.readByte();
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// byte header5 = in.readByte();
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// byte header6 = in.readByte();
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// if(header1 != 20 && header2 != 20 && header3 != 9 && header4 != 7 && header5 != 11 && header6 != 30){
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// //不是包头 直接丢弃
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// return null;
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// }
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// long length = in.readUnsignedInt();
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// if(in.readableBytes()!=length){
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// throw new Exception("标记的长度不符合实际长度");
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// }
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// //读取body
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// byte []bytes = new byte[in.readableBytes()];
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// in.readBytes(bytes);
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// String string = new String(bytes,"UTF-8");
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// String substring = string.substring(string.indexOf("{"), string.lastIndexOf("}") + 1);
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// JSONObject jsonObject = JSONObject.parseObject(substring);
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// String deviceId = jsonObject.getString("device_id");
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// log.debug("tcp deviceId:{}",deviceId);
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// String dataLength = jsonObject.getString("data_length");
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// Integer flawType = jsonObject.getInteger("msg");
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// String detectStatus = "";
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// if(flawType > 0){
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// detectStatus = "NG";
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// }else {
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// detectStatus = "OK";
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// }
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// String result = jsonObject.getString("result");
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// if(!StringUtils.isEmpty(result) && !"{}".equals(result)){
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// log.debug(result);
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// AdaptData adaptData = JSONObject.parseObject(result,AdaptData.class);
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// if(adaptData != null){
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// FlawRunnable flawRunnable = new FlawRunnable(jdbcTemplate,deviceId,"flaw",adaptData);
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// threadPoolExecutor.execute(flawRunnable);
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// }
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// }else {
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// log.warn("result为空：{}",result);
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// }
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// String s2 = string.substring(string.lastIndexOf("}") + 1, string.length());
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// WebSocketMapUtil.send(deviceId,s2,detectStatus);
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in.release();
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return null;
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}
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}
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王一鸣
5 years ago