servicechecker/pkg/scheduler/scheduler.go
Vasiliy Tolstov f610dd4e47 add scheduler
Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
2024-11-16 19:13:06 +03:00

94 lines
1.6 KiB
Go

package scheduler
import (
"time"
cron "github.com/go-co-op/gocron/v2"
)
type Task func()
type Scheduler interface {
Start() error
Stop() error
Jobs() []Job
NewJob(td time.Duration, fn any, args ...any) (Job, error)
}
type Job interface {
ID() string
LastRun() (time.Time, error)
Name() string
NextRun() (time.Time, error)
NextRuns(int) ([]time.Time, error)
}
type Options struct{}
type Option func(*Options) error
type scheduler struct {
scheduler cron.Scheduler
}
func NewScheduler(opts ...Option) (Scheduler, error) {
s, err := cron.NewScheduler()
if err != nil {
return nil, err
}
return &scheduler{scheduler: s}, nil
}
func (s *scheduler) Start() error {
s.scheduler.Start()
return nil
}
func (s *scheduler) Stop() error {
if err := s.scheduler.Shutdown(); err != nil {
return err
}
return nil
}
func (s *scheduler) NewJob(td time.Duration, fn any, args ...any) (Job, error) {
j, err := s.scheduler.NewJob(cron.DurationJob(td), cron.NewTask(fn, args...))
if err != nil {
return nil, err
}
return &job{job: j}, nil
}
func (s *scheduler) Jobs() []Job {
jobs := s.scheduler.Jobs()
ret := make([]Job, len(jobs))
for idx := range jobs {
ret[idx] = &job{job: jobs[idx]}
}
return ret
}
type job struct {
job cron.Job
}
func (j *job) ID() string {
return j.job.ID().String()
}
func (j *job) LastRun() (time.Time, error) {
return j.job.LastRun()
}
func (j *job) Name() string {
return j.job.Name()
}
func (j *job) NextRun() (time.Time, error) {
return j.job.NextRun()
}
func (j *job) NextRuns(n int) ([]time.Time, error) {
return j.job.NextRuns(n)
}