wheeltimer

Linux
*    *    *    *    *    *
-    -    -    -    -    -
|    |    |    |    |    |
|    |    |    |    |    + year [optional]
|    |    |    |    +----- day of week (0 - 7) (Sunday=0 or 7)
|    |    |    +---------- month (1 - 12)
|    |    +--------------- day of month (1 - 31)
|    +-------------------- hour (0 - 23)
+------------------------- min (0 - 59)

Java(Spring) AND GO(wheeltimer)
*    *    *    *    *    *    *
-    -    -    -    -    -    -
|    |    |    |    |    |    |
|    |    |    |    |    |    + year [optional]
|    |    |    |    |    +----- day of week (0 - 7) (Sunday=0 or 7)
|    |    |    |    +---------- month (1 - 12)
|    |    |    +--------------- day of month (1 - 31)
|    |    +-------------------- hour (0 - 23)
|    +------------------------- min (0 - 59)
+------------------------------ second (0 - 59)

crontab规则表达式验证网址

很实用的工具，推广一下： crontab表达式验证网址

wheeltimer: Use github.com/farmerx/wheeltimer

wg := &sync.WaitGroup{}

wheel := NewTimingWheel(context.TODO())
timeout := NewOnTimeOut(func() {
    fmt.Println(`hahahah `)
})
timerID := wheel.AddTimer(`1 7/13 * * * *`, timeout)
fmt.Printf("Add timer %d\n", timerID)
c := time.After(9 * time.Minute)
wg.Add(1)
go func() {
    for {
        select {
        case timeout := <-wheel.TimeOutChannel():
            timeout.Callback()
        case <-c:
            wg.Done()
        }
    }
}()
wg.Wait()
wheel.Stop()