cron

type Cron interface {
	AddJob(id string, spec string, job func() error) (err error)
	RemoveJob(id string) error
	HasJob(id string) bool
	ClearJobs() error
	AddSecondlyJob(id string, cmd func() error) (err error)
	AddMinutelyJob(id string, cmd func() error) (err error)
	AddHourlyJob(id string, cmd func() error) (err error)
	AddDailyJob(id string, cmd func() error) (err error)
	AddWeeklyJob(id string, cmd func() error) (err error)
	AddMonthlyJob(id string, cmd func() error) (err error)
	AddYearlyJob(id string, cmd func() error) (err error)
}