Integration with web apps

[DejanMilicic]

I am in the early learning phase, and I am attempting to produce minimal working example of small counter app, which is integrating Akka.net, Akkling and Falco

open Falco
open Falco.Routing
open Falco.HostBuilder
open Akkling
open Akka.Actor
open Akka

let system: ActorSystem = System.create "basic-sys" <| Configuration.defaultConfig()

type Message = 
    | IncreaseCounter
    | GetCounter

let greeter (m:Actor<Message>) =
    let rec loop state = actor {
        let! msg = m.Receive ()
        match msg with
        | IncreaseCounter -> return! loop (state + 1)
        | GetCounter -> m.Sender() <! state.ToString()

        return! loop state
    }
    loop 0

let greeterRef = spawnAnonymous system (props greeter)

webHost [||] {
    endpoints [
        get "/counter" (
            let counter = greeterRef <? GetCounter |> Async.RunSynchronously
            Response.ofPlainText counter
        )

        put "/counter" (
            greeterRef <! IncreaseCounter
            Response.ofEmpty
        )
    ]
}

I am experiencing the "get counter" always returning 0.
It is almost like the actor gets re-created repeatedly instead of sleeping and awaiting a message.

When I take this very same code outside of Falco and go with something like this

let greeterRef = spawnAnonymous system (props greeter)
greeterRef <! IncreaseCounter
let counter = greeterRef <? GetCounter |> Async.RunSynchronously

it works as expected.
So it is clear that the integration part is wrong.

Apologies for creating this as an issue - if we had Discussions here I would post it there.
Thanx!

[kerams]

Without knowing Falco, it would seem to me you're partially applying the GET handler, so the counter value 0 is embedded in it. Similarly, the counter is increased once during startup, not on every PUT.