F# class in Azure isolated process function. No job functions found

Question

I could not create an Azure isolated process function if I use F# class semantics, it works with the native F# function semantic. Could someone please take a look? Thank you!

The error is: No job functions found. Try making your job classes and methods public. If you're using binding extensions [...more...]

`module Functions`

open Domain

open Microsoft.Azure.Functions.Worker

open Microsoft.Extensions.Configuration

open Microsoft.Extensions.Logging

// this works, but could not use dependency registered in Host

[<Function("TimerTriggerFunction")>]

let TimeIntervalFunction ([<TimerTrigger("*/10 * * * * *")>] myTimer: TimerInfo) (context: FunctionContext) =

let logger = context.GetLogger("functionlogger")

logger.LogInformation("function is triggered!")

// I need dependency injection but this doesn't work

type public TimeIntervalFunctionClass() =

[<Function("TimerTriggerFunctionInClass")>]

member _.Run ([<TimerTrigger("*/5 * * * * *")>] myTimer: TimerInfo) (context: FunctionContext) =

let logger = context.GetLogger("classlogger")

logger.LogInformation("timer trigger in class")

Answer 1

Hello @Tri Nguyen

The error message you mentioned here suggests that you should make your job classes and methods public. In your code, you have defined a public class TimeIntervalFunctionClass, but the Run method is not public.

You should make the Run method public so that it can be discovered by the Azure Functions runtime. Here's an updated version of your code with the Run method made public:

module Functions

open Domain

open Microsoft.Azure.Functions.Worker

open Microsoft.Extensions.Configuration

open Microsoft.Extensions.Logging

// I need dependency injection but this doesn't work

type public TimeIntervalFunctionClass() = [] member public _.Run ([] myTimer: TimerInfo) (context: FunctionContext) =

let logger = context.GetLogger(classlogger)

logger.LogInformation("timer trigger in class")

Note that I also added quotes around the log message in the Run method.

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