The line where I sync the code (in the 1st code excerpt below) it returns a null error.

 

Attach Event:

@SubscribeEvent
public void attachCapabilities(AttachCapabilitiesEvent.Entity e) {
	net.minecraft.entity.Entity et = e.getEntity();

	if(!et.worldObj.isRemote && et instanceof EntityPlayer) {
		e.addCapability(new ResourceLocation(Scalae.MODID, "IScalaeCapability"), new ICapabilitySerializable<NBTTagCompound>() {
			IScalaeCapability instance = Scalae.CAPABILITY.getDefaultInstance();

			@Override
			public boolean hasCapability(Capability<?> capability, EnumFacing facing) {
				return capability == Scalae.CAPABILITY;
			}

			@Override
			public <T> T getCapability(Capability<T> capability, EnumFacing facing) {
				return capability == Scalae.CAPABILITY ? Scalae.CAPABILITY.<T> cast(instance) : null;
			}

			@Override
			public NBTTagCompound serializeNBT() {
				return (NBTTagCompound) Scalae.CAPABILITY.getStorage().writeNBT(Scalae.CAPABILITY, instance, null);
			}

			@Override
			public void deserializeNBT(NBTTagCompound nbt) {
				Scalae.CAPABILITY.getStorage().readNBT(Scalae.CAPABILITY, instance, null, nbt);
			}
		});

		ScalaeCapabilities.getStats((EntityPlayerMP) et).sync();
	}
}

 

Here's the get method:

public static PlayerStats getStats(EntityPlayer p) {
	if(!p.worldObj.isRemote) {
		final IScalaeCapability cap = p.getCapability(Scalae.CAPABILITY, null);

		if(cap != null) {
			return cap.getStats().setPlayer(p);
		}
	}

	return null;
}

 

And the sync method:

public void sync() { //Located in PlayerStats.class, has a player field
	if(player != null) {
		Scalae.network.sendTo(new MessageSync(this), (EntityPlayerMP) player);
	}
}

 

I have a message class that can be sent from the client to the server for a request to sync data, but I can't find a good event to place it in client-side.

AttachCapabilitiesEvent.Entity is fired directly after EntityConstructingEvent which bascially means - there is NOTHING to sync (example: entity can be constructed with "new", but that doesn't mean it is spawned to world or has its equivalent on client).

 

Syncing should happen from EntityJoinedWorldEvent. (Attach event is ONLY for attaching, not getting/modifying/syncing).