87 lines
1.9 KiB
Ruby
87 lines
1.9 KiB
Ruby
module Scheduler
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class ScheduleInfo
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attr_accessor :next_run,
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:prev_run,
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:prev_duration,
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:prev_result
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def initialize(klass, manager)
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@klass = klass
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@manager = manager
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key = Manager.schedule_key(klass)
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data = nil
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if data = $redis.get(key)
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data = JSON.parse(data)
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end
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if data
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@next_run = data["next_run"]
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@prev_run = data["prev_run"]
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@prev_result = data["prev_result"]
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@prev_duration = data["prev_duration"]
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end
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rescue
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# corrupt redis
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@next_run = @prev_run = @prev_result = @prev_duration = nil
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end
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def valid?
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return false unless @next_run
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(!@prev_run && @next_run < Time.now.to_i + 5.minutes) ||
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( @prev_run &&
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@prev_run <= Time.now.to_i &&
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@next_run < @prev_run + @klass.every * (1 + @manager.random_ratio)
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)
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end
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def schedule!
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if !valid? && @prev_run
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mixup = @klass.every * @manager.random_ratio
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mixup = (mixup * Random.rand - mixup / 2).to_i
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@next_run = @prev_run + mixup + @klass.every
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end
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if !valid?
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@next_run = Time.now.to_i + 5.minutes * Random.rand
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end
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write!
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end
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def write!
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key = Manager.schedule_key(@klass)
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clear!
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redis.set key, {
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next_run: @next_run,
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prev_run: @prev_run,
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prev_duration: @prev_duration,
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prev_result: @prev_result
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}.to_json
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redis.zadd Manager.queue_key, @next_run , @klass
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end
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def del!
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clear!
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@next_run = @prev_run = @prev_result = @prev_duration = nil
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end
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def key
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Manager.schedule_key(@klass)
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end
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def redis
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@manager.redis
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end
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private
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def clear!
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key = Manager.schedule_key(@klass)
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redis.del key
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redis.zrem Manager.queue_key, key
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end
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end
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end
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