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cron.go
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cron.go
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package _cronUtils
import (
"fmt"
"github.com/robfig/cron/v3"
"sync"
)
var cronInst *cron.Cron
var taskFuncMap = sync.Map{}
func GetCrontabInstance() *cron.Cron {
if cronInst != nil {
return cronInst
}
cronInst = cron.New()
cronInst.Start()
return cronInst
}
func AddTask(name string, schedule string, f func()) (entryID cron.EntryID, err error) {
if _, ok := getTaskFuncFromMap(name); !ok {
fmt.Println("Add a new task:", name)
cInstance := GetCrontabInstance()
entryID, err = cInstance.AddFunc(schedule, f)
if err == nil {
taskFuncMap.Store(name, entryID)
}
} else {
fmt.Println("Don't add same task `" + name + "` repeatedly!")
}
return
}
func RemoveTask(name string) {
if entryID, ok := getTaskFuncFromMap(name); ok {
fmt.Println("remove task:", name)
cInstance := GetCrontabInstance()
cInstance.Remove(entryID)
deleteTaskFuncFromMap(name)
}
}
func Stop() {
cronInst.Stop()
}
func getTaskFuncFromMap(key string) (ret cron.EntryID, ok bool) {
obj, ok := taskFuncMap.Load(key)
if ok {
ret = obj.(cron.EntryID)
}
return
}
func deleteTaskFuncFromMap(key string) {
taskFuncMap.Delete(key)
return
}