pl.tcs.btppllib.CustomHandlers.java Source code

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Here is the source code for pl.tcs.btppllib.CustomHandlers.java

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/*
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package pl.tcs.btppllib;

import static pl.tcs.btppllib.DeviceGetTimeTest.MAX_FRAME_LENGTH;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import java.util.List;

/**
 *
 * @author tomek
 */
public class CustomHandlers {

    public static OcitPacketAssembler getPacketAssemblerDecoder() {
        return new OcitPacketAssembler();
    }

    public static LengthFieldBasedFrameDecoder getLengthFieldShortenDecoder() {
        return new LengthFieldBasedFrameDecoder(MAX_FRAME_LENGTH, 3, 1, 0, 4);
    }

    public static class OcitPacketAssembler extends ByteToMessageDecoder {

        @Override
        protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
            final int readBytes = in.readableBytes();
            if (readBytes < 4) {
                return;
            }

            final int msgLen = in.getByte(3);
            if (readBytes < msgLen + 4) {
                return;
            }

            out.add(in.readBytes(msgLen + 4));
        }
    }
}