package main import ( "context" "fmt" "time" "github.com/xgfone/gron" ) func jobRunner(name string) gron.Runner { return func(c context.Context, now time.Time) (result interface{}, err error) { fmt.Printf("Starting to run job '%s' at '%s'\n", name, now.Format(time.RFC3339Nano)) return	} } func jobResultHook(result gron.JobResult) { fmt.Printf("End to run job '%s', cost '%s'.\n", result.Job.Name(), result.Cost) } func main() { exe := gron.NewExecutor() exe.AppendResultHooks(jobResultHook) // Add the job result hook exe.Start() // Start the executor in the background goroutine. // Add jobs exe.Schedule("job1", gron.Every(time.Minute), jobRunner("job1")) exe.Schedule("job2", gron.MustParseWhen("@every 2m"), jobRunner("job2")) everyMinuteScheduler := gron.MustParseWhen("*/1 * * * *") exe.ScheduleJob(gron.NewJob("job3", everyMinuteScheduler, jobRunner("job3"))) go func() { time.Sleep(time.Minute * 4) // exe.CancelJobs("job1", "job2", "job3") exe.Stop()	}() // Wait until the executor is stopped. exe.Wait() }