Class | Rufus::Scheduler::CronLine |
In: |
lib/rufus/scheduler/cronline.rb
|
Parent: | Object |
A ‘cron line’ is a line in the sense of a crontab (man 5 crontab) file line.
NEXT_TIME_MAX_YEARS | = | 14 | The max number of years in the future or the past before giving up searching for next_time or previous_time respectively | |
WEEKDAYS | = | %w[ sun mon tue wed thu fri sat ] | ||
DAY_S | = | 24 * 3600 | ||
RANGE_REGEX | = | /\A(\*|-?\d{1,2})(?:-(-?\d{1,2}))?(?:\/(\d{1,2}))?\z/ |
cache | [R] | |
days | [R] | |
hours | [R] | |
minutes | [R] | |
months | [R] | |
original | [R] | The string used for creating this cronline instance. |
original_timezone | [R] | |
seconds | [R] | |
timezone | [R] | |
weekdays | [R] | attr_reader :monthdays # reader defined below |
Returns the shortest delta between two potential occurences of the schedule described by this cronline.
.
For a simple cronline like "*/5 * * * *", obviously the frequency is five minutes. Why does this method look at a whole year of next_time ?
Consider "* * * * sun#2,sun#3", the computed frequency is 1 week (the shortest delta is the one between the second sunday and the third sunday). This method takes no chance and runs next_time for the span of a whole year and keeps the shortest.
Of course, this method can get VERY slow if you call on it a second- based cronline…
Returns a quickly computed approximation of the frequency for this cron line.
brute_frequency, on the other hand, will compute the frequency by examining a whole year, that can take more than seconds for a seconds level cron…
Returns the next time that this cron line is supposed to ‘fire‘
This is raw, 3 secs to iterate over 1 year on my macbook :( brutal. (Well, I was wrong, takes 0.001 sec on 1.8.7 and 1.9.1)
This method accepts an optional Time parameter. It‘s the starting point for the ‘search’. By default, it‘s Time.now
Note that the time instance returned will be in the same time zone that the given start point Time (thus a result in the local time zone will be passed if no start time is specified (search start time set to Time.now))
Rufus::Scheduler::CronLine.new('30 7 * * *').next_time( Time.mktime(2008, 10, 24, 7, 29)) #=> Fri Oct 24 07:30:00 -0500 2008 Rufus::Scheduler::CronLine.new('30 7 * * *').next_time( Time.utc(2008, 10, 24, 7, 29)) #=> Fri Oct 24 07:30:00 UTC 2008 Rufus::Scheduler::CronLine.new('30 7 * * *').next_time( Time.utc(2008, 10, 24, 7, 29)).localtime #=> Fri Oct 24 02:30:00 -0500 2008
(Thanks to K Liu for the note and the examples)
Returns the previous time the cronline matched. It‘s like next_time, but for the past.
Returns an array of 6 arrays (seconds, minutes, hours, days, months, weekdays). This method is mostly used by the cronline specs.
def monthday_match?(zt, values)
return true if values.nil? today_values = monthdays(zt) (today_values & values).any?
end