Package software.amazon.cloudformation.scheduler

Class CronHelper

  • public class CronHelper
extends Object

    • Constructor Summary

      Constructors 
      Constructor Description
      CronHelper()  
      CronHelper​(Clock clock)
      This .ctor provided for testing

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      String generateOneTimeCronExpression​(int minutesFromNow)
      Schedule a re-invocation of the executing handler no less than 1 minute from now /** Creates a cron(..) expression for a single instance at Now+minutesFromNow NOTE: CloudWatchEvents only support a 1minute granularity for re-invoke Anything less should be handled inside the original handler request Expression is of form cron(minutes, hours, day-of-month, month, day-of-year, year) where day-of-year is not necessary when the day-of-month and month-of-year fields are supplied

    • Constructor Detail

      • CronHelper

        public CronHelper()

      • CronHelper

        public CronHelper​(Clock clock)
        This .ctor provided for testing
        Parameters:
        clock - current clock system usually Clock.systemUTC()

    • Method Detail

      • generateOneTimeCronExpression

        public String generateOneTimeCronExpression​(int minutesFromNow)
        Schedule a re-invocation of the executing handler no less than 1 minute from now /** Creates a cron(..) expression for a single instance at Now+minutesFromNow NOTE: CloudWatchEvents only support a 1minute granularity for re-invoke Anything less should be handled inside the original handler request Expression is of form cron(minutes, hours, day-of-month, month, day-of-year, year) where day-of-year is not necessary when the day-of-month and month-of-year fields are supplied
        Parameters:
        minutesFromNow - The number of minutes from now for building the cron expression
        Returns:
        A cron expression for use with CloudWatchEvents putRule(..) API