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prometheus.rb
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prometheus.rb
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require "prometheus/dsl"
require "prometheus/checks"
require "prometheus/core_ext"
module Prometheus
class CheckList < Array
def sort_by_next_tick
sort! {|a,b| a.next_tick <=> b.next_tick }
end
def insert(check)
self << check.tick
sort_by_next_tick
end
end
class Reactor
include Prometheus::DSL
attr_reader :processes
def initialize(&block)
$start = Time.now.to_i
@checks = CheckList.new
instance_eval(&block)
end
def start
@processes.each do |process|
process.checks.each {|c| @checks.insert(c) }
end
checks, start = @checks, $start
loop do
GC.start
check = checks.shift
check.run
checks.insert(check)
sleep_time = checks.first.next_tick - (Time.now.to_i - start)
sleep sleep_time if sleep_time > 0
end
end
end
end