Cron/Scheduler support? about loco HOT 6 OPEN

Hey @exzachlyvv
We are not supporting Cron or the scheduler. you can trigger the a task with your preferred operation

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@exzachlyvv with rails, historically, there were 3 ways to run scheduled jobs:

1. always-on daemon, that keeps a schedule as well. usually there was special care for expressing a schedule in plain english.

schedule "every 2 weeks" do 
  # some code
end

2. Creating a watchdog / task that "wakes up", checks if there are tasks to run, and runs all pending tasks per schedule. Usually this "watchdog" task was run every 5 minutes with Cron. This also means maintaining state ("what are the tasks that should run next?") persisted somewhere
3. Having a queue with delayed job, where the delayed job worker is run periodically like (2) every constant time window.

Which technique would you be referring to?

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Any of these would work :)

My use case is simply that I need to run some code every X minutes. There are no requirements for a specific API.

Is this functionally Loco is interested in supporting (happy to help with it)? If yes, we can continue to discuss the ideal design for loco.

Simple idea: expose some endpoint /run-my-task and have an external service ping it every X minutes.

But ideally Loco can solve this problem :)

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Loco depends on sidekiq-rs which support Periodic Jobs. Maybe loco can expose the worker process in hooks(something like after_boot?) to support this?

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@ShallmentMo that's a great idea. I'm wondering how to integrate that seamlessly. On the face of it it looks like a "forever-running" await and so it needs a dedicated thread or process. So, if we create a Loco task and tell the user: "run this task in any way you like, it will hang and run the periodic jobs" it might work. On the other hand it will be 1 more extra process.
I'd welcome more ideas to satisfy: minimum user friction, and minimum resources neeed

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I don't know wether it might help or not. But I use sidekiq-cron to support cron job when using Rails and Sidekiq

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