36 lines
1.1 KiB
Markdown
36 lines
1.1 KiB
Markdown
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---
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title: "Cron Tasks"
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date: 2021-07-13T23:21:52+02:00
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draft: false
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menu:
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sidebar:
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parent: "development"
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---
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# How to add a cron job task
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Cron jobs are tasks which run on a predefined schedule.
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Vikunja uses these through a light wrapper package around the excellent [github.com/robfig/cron](https://github.com/robfig/cron) package.
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The package exposes a `cron.Schedule` method with two arguments: The first one to define the schedule when the cron task
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should run, and the second one with the actual function to run at the schedule.
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You would then create a new function to register your the actual cron task in your package.
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A basic function to register a cron task looks like this:
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{{< highlight golang >}}
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func RegisterSomeCronTask() {
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err := cron.Schedule("0 * * * *", func() {
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// Do something every hour
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}
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}
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{{< /highlight >}}
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Call the register method in the `FullInit()` method of the `init` package to actually register it.
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## Schedule Syntax
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The cron syntax uses the same on you may know from unix systems.
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It is described in detail [here](https://pkg.go.dev/github.com/robfig/cron#hdr-CRON_Expression_Format).
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