Java tutorial
/** * This file is part of Ogar. * * Ogar is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Ogar is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Ogar. If not, see <http://www.gnu.org/licenses/>. */ package com.ogarproject.ogar.server.net; import com.ogarproject.ogar.server.OgarServer; import com.ogarproject.ogar.server.net.packet.Packet; import com.ogarproject.ogar.server.net.packet.PacketRegistry; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelHandlerContext; import io.netty.handler.codec.MessageToMessageEncoder; import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame; import java.nio.ByteOrder; import java.util.List; public class PacketEncoder extends MessageToMessageEncoder<Packet> { @Override protected void encode(ChannelHandlerContext ctx, Packet packet, List out) throws Exception { ByteBuf buf = ctx.alloc().buffer().order(ByteOrder.LITTLE_ENDIAN); int packetId = PacketRegistry.CLIENTBOUND.getPacketId(packet.getClass()); if (packetId == -1) { throw new IllegalArgumentException("Provided packet is not registered as a clientbound packet!"); } buf.writeByte(packetId); packet.writeData(buf); out.add(new BinaryWebSocketFrame(buf)); OgarServer.log.finest("Sent packet ID " + packetId + " (" + packet.getClass().getSimpleName() + ") to " + ctx.channel().remoteAddress()); } }