I have a laser block that can shoot lasers using energy. The laser has the option to be always active or only active if a redstone signal is sent (like the command block). If the player clicks in the GUI on the button it should update it on the server. So I read https://mcforge.readthedocs.io/en/latest/networking/simpleimpl/ and tried to implement it for my case. To send the data I use SimpleChanel.sendToServer. But somehow it sends the data to the client. My code:

PacketHandler:

    private static final String PROTOCOL_VERSION = "1";
    public static final SimpleChannel LASER_CHANNEL = NetworkRegistry.newSimpleChannel(
            new ModResourceLocation("laser_transmitter"),
            () -> PROTOCOL_VERSION,
            PROTOCOL_VERSION::equals,
            PROTOCOL_VERSION::equals);

    private static int id = 0;

    public static class LaserPacket {

        BlockPos pos;
        boolean alwaysActive;

        public LaserPacket(PacketBuffer buffer) {
            this(buffer.readBlockPos(), buffer.readBoolean());
        }

        public LaserPacket(BlockPos pos, boolean alwaysActive) {
            this.pos = pos;
            this.alwaysActive = alwaysActive;
        }

        public void encode(PacketBuffer packetBuffer) {
            packetBuffer.writeBlockPos(pos);
            packetBuffer.writeBoolean(alwaysActive);
        }

        public void handle(Supplier<NetworkEvent.Context> ctx) {
            ctx.get().enqueueWork(() -> {
                World world = Minecraft.getInstance().world;
                if (!world.isRemote()) {
                    LaserTransmitterTileEntity tileEntity = (LaserTransmitterTileEntity)world.getTileEntity(pos);
                    tileEntity.setAlwaysActive(alwaysActive);
                }
            });
            ctx.get().setPacketHandled(true);
        }
    }

    public static void register() {
        LASER_CHANNEL.registerMessage(id++, LaserPacket.class, LaserPacket::encode, LaserPacket::new, LaserPacket::handle);
    }

TileEntity:

    public void setAlwaysActive(boolean alwaysActive) {
        this.alwaysActive = alwaysActive;

        if (world.isRemote()) {
            PacketHandler.LASER_CHANNEL.sendToServer(new TatPacketHandler.LaserPacket(pos, alwaysActive));
        } else {
            markDirty();
        }
    }

 

The methode PacketHandler.register is called in the constructor of my Main class.

But when i debug in LaserPacket.handle the world is always a ClientWorld. What have I done wrong?

Thank you! It works now.