openHAB规则中的变量cron

Question

为了从GUI设置警报，我想将一个变量作为参数传递给cron。

这项工作：

rule "Wake up"
when
  Time cron "00 00 06 * * ?"
then
  // ...
end

这不起作用：

var morning = "00 00 06 * * ?"
rule "Wake up"
when
  Time cron morning
then
  // ...
end

这样做可能吗？

Answer 1

Cron字符串不能更改，但我使用以下代码来绕过它：

import org.joda.time.Duration
import org.quartz.CronExpression
var Timer wateringtimer = null
// Start watering at 03:00 AM, all days except Saturday (5)                               
val wateringCronString = "0 0 3 ? * 1,2,3,4,5,6"
...
rule "Set Cron" 
...
var cronExpression = new CronExpression(wateringCronString)
var triggerTime = cronExpression.getNextValidTimeAfter(now.plusMinutes(1).toDate)
Seconds::secondsBetween(now,new DateTime(triggerTime)).getSeconds()
if (watertimer !== null) 
  watertimer.cancel()
wateringtimer = createTimer(now.plusSeconds(diff),
    [
        ...Do something... 
    ])