package com.manning.nettyinaction.chapter13;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.socket.DatagramPacket;
import io.netty.handler.codec.MessageToMessageDecoder;
import io.netty.util.CharsetUtil;
import java.util.List;
/**
* @author <a href="mailto:nmaurer@redhat.com">Norman Maurer</a>
*/
public class LogEventDecoder extends MessageToMessageDecoder<DatagramPacket> {
@Override
protected void decode(ChannelHandlerContext ctx, DatagramPacket datagramPacket, List<Object> out) throws Exception {
ByteBuf data = datagramPacket.content();
int i = data.indexOf(0, data.readableBytes(), LogEvent.SEPARATOR);
String filename = data.slice(0, i).toString(CharsetUtil.UTF_8);
String logMsg = data.slice(i + 1, data.readableBytes()).toString(CharsetUtil.UTF_8);
LogEvent event = new LogEvent(datagramPacket.recipient(), System.currentTimeMillis(),
filename,logMsg);
out.add(event);
}
}