software.amazon.cloudformation.scheduler

Class CronHelper

java.lang.Object

software.amazon.cloudformation.scheduler.CronHelper

public class CronHelper
extends Object

Constructor Summary

Constructors

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

Method Summary

Modifier and Type

Method and 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

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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