cron VS gronx

Features - Supports Slack Apps using Socket Mode - Easy definitions of commands and their input - Built-in help command - Bot responds to mentions and direct messages - Simple parsing of String, Integer, Float and Boolean parameters - Customizable, intuitive and with many examples to follow - Replies can be new messages or in threads - Replies can be ephemeral, scheduled, updated or deleted - Supports Slash Commands and Interactive Messages - Supports context.Context - Supports middlewares & grouping of commands - Supports Cron Jobs using https://github.com/robfig/cron - Handlers run concurrently via goroutines - Full access to the Slack API github.com/slack-go/slack

You could this https://github.com/robfig/cron

This will print "Valid cron expression: */20 * * * *" to the console. You can find more information about this library, including installation instructions, on its GitHub page: https://github.com/robfig/cron

I used robfig/cron on each of the workers. I only had on the order of ~10 workers so polling was not an issue.

There are many excellent open-source projects on GitHub, where the code is transparent and available to everyone. As software developer, we can learn a lot from them including software engineering, unit testing, coding style standardization, etc. We can even find issues by looking into their code, and submit pull requests to contribute to tech communities. Today we are going to dig into the source code of a popular Golang open-source project on GitHub, robfig/cron, which is small and with clear annotations, and is very suitable for new developers to learn how to read and analyze source code.

Now let's implement the core of task scheduler, cron job. We will be using robfig/cron, a reputable cron library written in Go.

# Hello Everyone! Ive built this cronjob library after the trusted: https://github.com/robfig/cron.

I suggest this library.

You can take inspiration on cron lib, create a Job i's a function that you give a channel for quit action, and a probably cancel function (from background.WithCancel) for cancel running asynchronous task. You can have a scheduling worker if you decouple a great task to multiple job that listen to a channel that emit event.

maybe use gronx https://github.com/adhocore/gronx

Check https://github.com/adhocore/gronx, there are more cron libraries, check if they have something like IsValid or MustParse.

personally, i would have used gronx/tasker as a task daemon that runs tasks on specific time as defined by Cron expression

for standalone use that supports crontab format file: https://github.com/adhocore/gronx#task-daemon

View on GitHub

also how do you use Next time? just being able to know next time is of no use as well. IsDue is meant to be used as if IsDue(...) { /* run something */ } it will be supported natively as task scheduler in long run: https://github.com/adhocore/gronx/issues/1