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scheduler_agent.rb 3.0KB

    require 'rufus-scheduler' module Agents class SchedulerAgent < Agent include AgentControllerConcern cannot_be_scheduled! cannot_receive_events! cannot_create_events! @@second_precision_enabled = ENV['ENABLE_SECOND_PRECISION_SCHEDULE'] == 'true' cattr_reader :second_precision_enabled description <<-MD The Scheduler Agent periodically takes an action on target Agents according to a user-defined schedule. # Action types Set `action` to one of the action types below: * `run`: Target Agents are run at intervals, except for those disabled. * `disable`: Target Agents are disabled (if not) at intervals. * `enable`: Target Agents are enabled (if not) at intervals. # Targets Select Agents that you want to run periodically by this SchedulerAgent. # Schedule Set `schedule` to a schedule specification in the [cron](http://en.wikipedia.org/wiki/Cron) format. For example: * `0 22 * * 1-5`: every day of the week at 22:00 (10pm) * `*/10 8-11 * * *`: every 10 minutes from 8:00 to and not including 12:00 This variant has several extensions as explained below. ## Timezones You can optionally specify a timezone (default: `#{Time.zone.name}`) after the day-of-week field. * `0 22 * * 1-5 Europe/Paris`: every day of the week when it's 22:00 in Paris * `0 22 * * 1-5 Etc/GMT+2`: every day of the week when it's 22:00 in GMT+2 ## Seconds You can optionally specify seconds before the minute field. * `*/30 * * * * *`: every 30 seconds #{"Only multiples of fifteen are allowed as values for the seconds field, i.e. `*/15`, `*/30`, `15,45` etc." unless second_precision_enabled} ## Last day of month `L` signifies "last day of month" in `day-of-month`. * `0 22 L * *`: every month on the last day at 22:00 ## Weekday names You can use three letter names instead of numbers in the `weekdays` field. * `0 22 * * Sat,Sun`: every Saturday and Sunday, at 22:00 ## Nth weekday of the month You can specify "nth weekday of the month" like this. * `0 22 * * Sun#1,Sun#2`: every first and second Sunday of the month, at 22:00 * `0 22 * * Sun#L1`: every last Sunday of the month, at 22:00 MD def default_options super.update({ 'schedule' => '0 * * * *', }) end def working? true end def validate_options if (spec = options['schedule']).present? begin cron = Rufus::Scheduler::CronLine.new(spec) unless second_precision_enabled || (cron.seconds - [0, 15, 30, 45, 60]).empty? errors.add(:base, "second precision schedule is not allowed in this service") end rescue ArgumentError errors.add(:base, "invalid schedule") end else errors.add(:base, "schedule is missing") end end before_save do self.memory.delete('scheduled_at') if self.options_changed? end end end