Java tutorial
package buildcraftAdditions.networking; import io.netty.buffer.ByteBuf; import net.minecraft.tileentity.TileEntity; import cpw.mods.fml.common.network.simpleimpl.IMessage; import cpw.mods.fml.common.network.simpleimpl.IMessageHandler; import cpw.mods.fml.common.network.simpleimpl.MessageContext; import buildcraftAdditions.api.configurableOutput.IConfigurableOutput; import buildcraftAdditions.api.configurableOutput.SideConfiguration; /** * Copyright (c) 2014-2015, AEnterprise * http://buildcraftadditions.wordpress.com/ * Buildcraft Additions is distributed under the terms of GNU GPL v3.0 * Please check the contents of the license located in * http://buildcraftadditions.wordpress.com/wiki/licensing-stuff/ */ public class MessageConfiguration implements IMessage, IMessageHandler<MessageConfiguration, IMessage> { private final SideConfiguration configuration; private int x, y, z; public MessageConfiguration() { configuration = new SideConfiguration(); } public MessageConfiguration(IConfigurableOutput configurableOutput) { this(); x = configurableOutput.getX(); y = configurableOutput.getY(); z = configurableOutput.getZ(); configuration.load(configurableOutput); } @Override public void fromBytes(ByteBuf buf) { x = buf.readInt(); y = buf.readInt(); z = buf.readInt(); configuration.readFromByteBuff(buf); } @Override public void toBytes(ByteBuf buf) { buf.writeInt(x); buf.writeInt(y); buf.writeInt(z); configuration.writeToByteBuff(buf); } @Override public IMessage onMessage(MessageConfiguration message, MessageContext ctx) { TileEntity tile = ctx.getServerHandler().playerEntity.worldObj.getTileEntity(message.x, message.y, message.z); if (tile != null && tile instanceof IConfigurableOutput) { ((IConfigurableOutput) tile).setSideConfiguration(message.configuration); ctx.getServerHandler().playerEntity.worldObj.notifyBlocksOfNeighborChange(message.x, message.y, message.z, ctx.getServerHandler().playerEntity.worldObj.getBlock(message.x, message.y, message.z)); } return null; } }