mirror of https://github.com/portainer/portainer
74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
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package scheduler
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import (
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"context"
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"log"
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"strconv"
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"time"
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"github.com/pkg/errors"
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"github.com/robfig/cron/v3"
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)
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type Scheduler struct {
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crontab *cron.Cron
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shutdownCtx context.Context
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}
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func NewScheduler(ctx context.Context) *Scheduler {
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crontab := cron.New(cron.WithChain(cron.Recover(cron.DefaultLogger)))
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crontab.Start()
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s := &Scheduler{
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crontab: crontab,
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}
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if ctx != nil {
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go func() {
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<-ctx.Done()
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s.Shutdown()
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}()
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}
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return s
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}
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// Shutdown stops the scheduler and waits for it to stop if it is running; otherwise does nothing.
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func (s *Scheduler) Shutdown() error {
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if s.crontab == nil {
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return nil
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}
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log.Println("[DEBUG] Stopping scheduler")
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ctx := s.crontab.Stop()
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<-ctx.Done()
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for _, j := range s.crontab.Entries() {
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s.crontab.Remove(j.ID)
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}
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err := ctx.Err()
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if err == context.Canceled {
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return nil
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}
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return err
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}
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// StopJob stops the job from being run in the future
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func (s *Scheduler) StopJob(jobID string) error {
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id, err := strconv.Atoi(jobID)
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if err != nil {
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return errors.Wrapf(err, "failed convert jobID %q to int", jobID)
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}
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s.crontab.Remove(cron.EntryID(id))
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return nil
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}
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// StartJobEvery schedules a new periodic job with a given duration.
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// Returns job id that could be used to stop the given job
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func (s *Scheduler) StartJobEvery(duration time.Duration, job func()) string {
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entryId := s.crontab.Schedule(cron.Every(duration), cron.FuncJob(job))
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return strconv.Itoa(int(entryId))
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}
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