old ServerHandler code before rewrite to support large packets

ServerHandler.java

package de.geolykt.galimp.prototype.server;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import de.geolykt.galimp.prototype.Side;
import de.geolykt.galimp.prototype.common.PacketProccessor;
import de.geolykt.galimp.prototype.server.packets.processing.JoinPacketProcessor;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

public class ServerHandler extends ChannelInboundHandlerAdapter {

    protected final GalimulatorServer server;
    protected final PacketProccessor[] packetProccessors;

    public ServerHandler(GalimulatorServer galimulatorServer) {
        this.server = galimulatorServer;
        this.packetProccessors = new PacketProccessor[] {
                new JoinPacketProcessor(server)
        };
    }

    @Override
    public synchronized void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        server.getLogger().info("Read " + msg);
        ByteBuf rawData = (ByteBuf) msg;
        if (rawData.capacity() < 10) {
            // prevent Buffer underflow
            server.extension.getLogger().error("Unable to parse packet (buffer underflow): " + Arrays.toString(rawData.array()) + ". Packet ignored.");
            return;
        }
        ByteBuffer readData = rawData.nioBuffer();
        long sourceClient = readData.getLong();
        short packetId = readData.getShort();
        if (packetProccessors.length <= packetId || packetId < 0) {
            // prevent potential AIOBE
            server.extension.getLogger().warn("Ignoring packet from client " + sourceClient + " as it is using an unsupported packetId (" + packetId + ").");
            return;
        }
        packetProccessors[packetId].process(Side.CLIENT, sourceClient, readData);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        server.getLogger().error("Error in Server NIO. Closing channel", cause);
        ctx.close();
    }
}