module Scheduler class ScheduleInfo attr_accessor :next_run, :prev_run, :prev_duration, :prev_result, :current_owner def initialize(klass, manager) @klass = klass @manager = manager data = nil if data = $redis.get(key) data = JSON.parse(data) end if data @next_run = data["next_run"] @prev_run = data["prev_run"] @prev_result = data["prev_result"] @prev_duration = data["prev_duration"] @current_owner = data["current_owner"] end rescue # corrupt redis @next_run = @prev_run = @prev_result = @prev_duration = @current_owner = nil end def valid? return false unless @next_run (!@prev_run && @next_run < Time.now.to_i + 5.minutes) || valid_every? || valid_daily? end def valid_every? return false unless @klass.every !!@prev_run && @prev_run <= Time.now.to_i && @next_run < @prev_run + @klass.every * (1 + @manager.random_ratio) end def valid_daily? return false unless @klass.daily !!@prev_run && @prev_run <= Time.now.to_i && @next_run < @prev_run + 1.day end def schedule_every! if !valid? && @prev_run mixup = @klass.every * @manager.random_ratio mixup = (mixup * Random.rand - mixup / 2).to_i @next_run = @prev_run + mixup + @klass.every end if !valid? @next_run = Time.now.to_i + 5.minutes * Random.rand end end def schedule_daily! return if valid? at = @klass.daily[:at] || 0 today_begin = Time.now.midnight.to_i today_offset = DateTime.now.seconds_since_midnight # If it's later today if at > today_offset @next_run = today_begin + at else # Otherwise do it tomorrow @next_run = today_begin + 1.day + at end end def schedule! if @klass.every schedule_every! elsif @klass.daily schedule_daily! end write! end def write! clear! redis.set key, { next_run: @next_run, prev_run: @prev_run, prev_duration: @prev_duration, prev_result: @prev_result, current_owner: @current_owner }.to_json redis.zadd Manager.queue_key, @next_run , @klass end def del! clear! @next_run = @prev_run = @prev_result = @prev_duration = @current_owner = nil end def key Manager.schedule_key(@klass) end def redis @manager.redis end private def clear! redis.del key redis.zrem Manager.queue_key, @klass end end end