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    • org.fisco.bcos.channel.handler.Decoder Maven / Gradle / Ivy

    package org.fisco.bcos.channel.handler;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Decoder extends ByteToMessageDecoder {
  private static Logger logger = LoggerFactory.getLogger(Decoder.class);

  private Integer dataLength = 0;

  @Override
  protected void decode(ChannelHandlerContext ctx, ByteBuf in, List out) throws Exception {
    logger.debug("decode:" + in.readableBytes());

    while (true) {
      if (dataLength > 0) {
        if (in.readableBytes() < dataLength - 4) {
          return;
        }

        Short type = in.readShort();
        ByteBuf data = in.readBytes(dataLength - 6);

        Message message = new Message();
        message.setLength(dataLength);
        message.setType(type);
        message.setData(data.array());

        logger.debug(
            "new message: "
                + String.valueOf(message.getLength())
                + ","
                + String.valueOf(message.getType()));
        out.add(message);
        dataLength = 0;
      } else {
        if (in.readableBytes() < 4) {
          return;
        }

        dataLength = in.readInt();
        logger.debug("dataLength " + String.valueOf(dataLength));
      }
    }
  }
}
    
    
    
    

    




    
    
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