Cron exception
Replace names of dows and doms in expression
Struct containing parsed cron expression
NOTES: - If both the 'Day-of-month' and 'Day-of-week' fields are restricted (aren't '*'), next correct time will be when both(!) fields match the conditions. For example: * * * 13 * FRI expression will be satisfied only on friday 13th. - Ranges can be overflowing, it means range 'NOV-FEB' (NOV > FEB) will expand in NOV,DEC,JAN,FEB
Copyright (c) 2018, Maxim Tyapkin.
This software is licensed under the terms of the BSD 3-clause license. The full terms of the license can be found in the LICENSE.md file.
This framework provides parser of cron expressions and evaluator of next date and time of triggering parsed cron expressions.
Cron expression consists of 6 required fields separated by white space
Supported fields:
Field Allowed values Special charachters
Seconds 0-59 , - * / Minutes 0-59 , - * / Hours 0-23 , - * / Day-of-month 1-31 , - * / ? Month 1-12 or JAN-DEC , - * / Day-of-week 1-7 or MON-SUN , - * / ?
Months names: JAN,FEB,MAR,APR,MAY,JUN,JUL,AUG,SEP,OCT,NOV,DEC Day-of-weeks names: MON,TUE,WED,THU,FRI,SAT,SUN
Charachters:
Asterisk (*): is used for specify all values (eg. 'every minute' in minute field)
Comma (,): is used for to separate items of a list (eg. using "MON,WED,FRI" in the 6th field (day of week) means Mondays, Wednesdays, Fridays)
Hyphen (-): is used for define ranges (eg. 10-30 in 1st field means every second between 10 and 30 inclusive)
Slash (/): is used for define step values, a/x = a, a+x, a+2x, a+3x, ... (eg. 2/4 in hours means list of 2,6,10,14,18,22) '*' mean minimal allowed value (eg. 0 for hours, 1 for months etc)
Question mark (?): is a synonym of '*' for day-of-week and day-of-month fields used to explicitly indicate that days are set with other field