How to run background jobs? (lemmy.world)

submitted 2 years ago* (last edited 2 years ago) by [email protected] to c/[email protected]

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Is there any library for the queueing mechanism?

What's used by the most - Cron? But a task or rather script executed by Cron won't access to the context of an application. Meaning, a task will have be an independent unit. Whereas I want is a library to use inside a project such that it'll have access to everything.

Anything similar to Sidekiq exist in Rust?

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[-] [email protected] 2 points 2 years ago

std::thread::spawn(|| {
    loop {
        std::thread::sleep(std::time::Duration::from_secs(30*60));
        do_job();
    }
});

Works pretty well. Maybe add a bit of code to crash the whole process on panic or some other logging. Wastes a few KiB of memory per loop but probably not a major issue. Doing this with async will waste only the tiniest amount of memory.

[-] [email protected] 0 points 2 years ago* (last edited 2 years ago)

what if one of the calls crashes? how would you re-run it?

[-] [email protected] 1 points 2 years ago

Best option is probably to add a wrapper around the thread that re-spawns it. But you can also just catch panics in the loop.

[-] [email protected] 0 points 2 years ago* (last edited 2 years ago)

How would you re-run it multiple times then? An internal should be progressively greater. How would you terminate it if it continues to produce an exception?

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this post was submitted on 18 Sep 2023

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