Is there a way to run Cron Jobs with Ktor? My end ...

# ktor

[Adam Hurwitz]

Is there a way to run Cron Jobs with Ktor? My end objective is to host a Cron Job written with Kotlin for the Coinverse Android app's backend service to populate data.

Much appreciated! 🙏

https://stackoverflow.com/questions/59516599/how-to-run-cron-jobs-in-kotlin-ktor

Also, Google has an interesting alpha outside of Ktor that could be a good alternative for running timed tasks to populate data, Using Kotlin with Google Cloud Functions: https://github.com/GoogleCloudPlatform/kotlin-samples/tree/master/functions

[cy]

Simply launch a coroutine on the application scope with a loop with delay

[TanVD]

For AWS we have pretty much same — @Scheduled in #kotless. It will also support cloud-based Cron jobs for Ktor starting with 1.3.0

[Adam Hurwitz]

Thanks @cy and @TanVD!

@cy, I'm not looking to build any endpoints to make requests with Ktor. The goal is to run the Coroutine inside the Application.main method to populate data on a given time frequency.

Would this implementation work?

import io.ktor.application.Application
fun Application.main() {
    // Coroutine with a loop and delay here.
}

[cy]

You need to launch it

[cy]

fun Application.main() {
    launch {
        // polling loop goes here
    }
}

[Adam Hurwitz]

Awesome. Can I use GlobalScope or Application scope?

[Adam Hurwitz]

Then last step is deploying Ktor: https://cloud.google.com/community/tutorials/kotlin-ktor-app-engine-java8#deploy_your_application

[Adam Hurwitz]

The loop inside launch could be something as simple as while(true) { ... }