Dynamically set schedule in Azure Function

Question

I have following function.json for my Azure function whose schedule is set to run at 9.30 daily. What I want is to dynamically set the schedule attribute of this json. This scenario arises when a client who is using my application enters date, on that date-scheduler should run.

   {
  "bindings": [
    {
      "name": "myTimer",
      "type": "timerTrigger",
      "direction": "in",
      "schedule": "0 30 9 * * *" //Want to set dynamically
    }
  ],
  "disabled": false
}

Is this possible?

(Also note, I don't want to use Azure Scheduler due to budgeting reasons)

Answer 1

Its an old question but still relevant. I recently came across a similar issue. Azure function has a built in functionality that you can use. Its called Eternal orchestrations in Durable Functions (Azure Functions). You can do something like

[FunctionName("Periodic_Cleanup_Loop")]
public static async Task Run([OrchestrationTrigger] IDurableOrchestrationContext 
context)
{

await context.CallActivityAsync("DoCleanup", null);

// sleep for one hour between cleanups
DateTime nextCleanup = context.CurrentUtcDateTime.AddHours(1);
await context.CreateTimer(nextCleanup, CancellationToken.None);

context.ContinueAsNew(null);
}

More lnfo can be found at https://docs.microsoft.com/en-us/azure/azure-functions/durable/durable-functions-eternal-orchestrations?tabs=csharp