# cron

**Repository Path**: yashan_tech/cron

## Basic Information

- **Project Name**: cron
- **Description**: https://github.com/robfig/cron
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: yasdb-3.0.2
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 1
- **Created**: 2025-01-03
- **Last Updated**: 2025-01-15

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# yascron

To download the specific tagged release, run:

	go get git.yasdb.com/yascron

Import it in your program as:

	import "git.yasdb.com/yascron"

It requires Go 1.19 or later due to usage of Go Modules.

Usage

Callers may register Tasks to be invoked on a given schedule.  yascron will run
them in their own goroutines.

	c := New(WithLogger(...))
    t1 := NewCronTask("hour", "30 * * * *", func() { fmt.Println("Every hour on the half hour") })
    t2 := NewCronTask("range", "30 3-6,20-23 * * *", func() { fmt.Println(".. in the range 3-6am, 8-11pm") })
    t3 := NewCronTask("day", "CRON_TZ=Asia/Tokyo 30 04 * * * *", func() { fmt.Println("Runs at 04:30 Tokyo time every day") })
    c.AddTask(t1)
    c.AddTask(t2)
    c.AddTask(t3)
	c.Start()
	...
	c.Stop()  // Stop the scheduler (does not stop any jobs already running).

CRON Expression Format

A cron expression represents a set of times, using 5 space-separated fields.

	Field name   | Mandatory? | Allowed values  | Allowed special characters
	----------   | ---------- | --------------  | --------------------------
	Minutes      | Yes        | 0-59            | * / , -
	Hours        | Yes        | 0-23            | * / , -
	Day of month | Yes        | 1-31            | * / , - ?
	Month        | Yes        | 1-12 or JAN-DEC | * / , -
	Day of week  | Yes        | 0-6 or SUN-SAT  | * / , - ?

Month and Day-of-week field values are case insensitive.  "SUN", "Sun", and
"sun" are equally accepted.

The specific interpretation of the format is based on the Cron Wikipedia page:
https://en.wikipedia.org/wiki/Cron

Thanks for github.com/robfig/cron!