How to display player count with MessagingService

[MrGamingZB]

Hello, I am creating a system in my Roblox game that displays a player count for a specific private server based on the target PrivateServerId. From my knowledge, I don’t think it’s possible to “invoke” another server using MessagingService, so I tried out a system that bounces back data (MessagingService Async) and validates it through the parameters of the Data. This is messy and also doesn’t work too well.

What is another way I can accomplish this using MessagingService? Is there an easier way to “invoke” a specific server and be able to return the player count?

Thanks.

[legs_v (legs)]

You can’t invoke specific servers due to their limitted hardware meaning basically all transmissions go to every server. So you’d have to go with this

@MrGamingZB

validates it through the parameters of the Data

[SOTR654]

Maybe something like that?

Script that will return the amount:

local MS = game:GetService("MessagingService")
local PS = game.PrivateServerId
MS:SubscribeAsync("Order_"..PS, function()
	MS:PublishAsync("Response_"..PS, #game:GetService("Players"):GetPlayers())
end)

Script that asks for the information:

local MS = game:GetService("MessagingService")
local function GetNumberOfPlayers(PrivateServerId: number): number?
	local Players = nil
	local RBX = MS:SubscribeAsync("Response_"..PrivateServerId, function(Amount)
		Players = Amount
	end)
	MS:PublishAsync("Order_"..PrivateServerId, "")
	
	--			Wait			--
	local MaxWait = 10
	while not Players and MaxWait > 0 do  MaxWait -= game:GetService("RunService").Heartbeat:Wait()  end
	RBX:Disconnect()
	return Players
end

you can change 10, keep in mind that it can wait infinitely if the server is not activated.