Hello all, I am new to Kotlin.. I have a rest API ...

# server

[seldomcoder]

Hello all,
I am new to Kotlin..
I have a rest API built on Javalin..I want to add a feature which takes customer details from DB and charges them fees on first of every month..but it shouldn't be a endpoint to be triggered by a cron job from someplace else..it should be internal to the app (should be in another thread, I guess since rest endpoints will be maintained by one thread??) How do I go about this?

[Yevgeni Liskovich]

you probably need a job-scheduler. it will be triggered internally. try to put the scheduler code in the main func, before starting the server.
you can do it with plain java classes:
https://stackoverflow.com/questions/22163662/how-to-create-a-java-cron-job
or using quartz library http://www.quartz-scheduler.org/documentation/quartz-2.3.0/quick-start.html

[seldomcoder]

@Yevgeni Liskovich thank you for this information..
Could you please let me know how do I add quartz dependency in build.gradle.kts file..I have tried multiple things and still getting errors (sorry for such a dumb question..I am new to the whole Java vertical as such..coming from python)

[Yevgeni Liskovich]

you need to add:
implementation(“org.quartz-schedulerquartz2.3.2”)
under dependencies scope:

dependencies {
implementation(“org.quartz-schedulerquartz2.3.2")
}

[asad.awadia]

If your use case is not too intense - you maybe able to get by with a scheduleAtFixedRateTimer thing directly in main (at startup of app) that scans your DB and does the work