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    • com.github.brainlag.nsq.netty.NSQDecoder Maven / Gradle / Ivy

    The newest version!
    package com.github.brainlag.nsq.netty;

import com.github.brainlag.nsq.frames.NSQFrame;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;

import java.util.List;

public class NSQDecoder extends MessageToMessageDecoder {

    private int size;
    private NSQFrame frame;

    public NSQDecoder() {
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List out) throws Exception {
        size = in.readInt();
        int id = in.readInt();
        frame = NSQFrame.instance(id);
        if (frame == null) {
            //uhh, bad response from server..  what should we do?
            throw new Exception("Bad frame id from server (" + id + ").  disconnect!");
        }
        frame.setSize(size);
        ByteBuf bytes = in.readBytes(frame.getSize() - 4); //subtract 4 because the frame id is included
        if (bytes.hasArray()) {
            frame.setData(bytes.array());
        } else {
            byte[] array = new byte[bytes.readableBytes()];
            bytes.readBytes(array);
            frame.setData(array);
        }
        out.add(frame);
        bytes.release();
    }

}
    
    
    
    

    




    
    
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