Timer trigger

To create a serverless function that executes on a specific schedule, we need to use the timer trigger. A timer trigger is an event, which triggers the function execution periodically, based on a specific schedule. To demonstrate a scheduled function, we will create a new function to run every minute and average our scoring results.

Note

There are certainly easier ways to average scoring results, however, we are using averaging to showcase a scheduled process.

Prior to creating the function, let us explain how to define the function's schedule.

CRON expression

In Azure Functions, a binding for a timer trigger will look like the following, where the schedule is defined by a CRON expression:

    {
        "name": "name of the trigger parameter in function signature",
        "type": "timerTrigger",
        "direction": "in",
        "schedule": "CRON Expression"
    }

A CRON expression is a string, typically, used to define a schedule for a routine in job schedulers on Unix-like systems...