lib/bluepill/condition_watch.rb
module Bluepill
HistoryValue = Struct.new(:value, :critical)
class ConditionWatch
attr_accessor :logger, :name
EMPTY_ARRAY = [].freeze # no need to recreate one every tick
def initialize(name, options = {})
@name = name
@logger = options.delete(:logger)
@fires = options.key?(:fires) ? Array(options.delete(:fires)) : [:restart]
@every = options.delete(:every)
@times = options.delete(:times) || [1, 1]
@times = [@times, @times] unless @times.is_a?(Array) # handles times: 5
@include_children = options.delete(:include_children) || false
clear_history!
@process_condition = ProcessConditions[@name].new(options)
end
def run(pid, tick_number = Time.now.to_i)
if @last_ran_at.nil? || (@last_ran_at + @every) <= tick_number
@last_ran_at = tick_number
begin
value = @process_condition.run(pid, @include_children)
rescue => e
logger.err(e.backtrace)
raise e
end
@history << HistoryValue.new(@process_condition.format_value(value), @process_condition.check(value))
logger.info(to_s)
return @fires if fired?
end
EMPTY_ARRAY
end
def clear_history!
@history = Util::RotationalArray.new(@times.last)
end
def fired?
@history.count { |v| !v.critical } >= @times.first
end
def to_s
data = @history.collect { |v| "#{v.value}#{'*' unless v.critical}" }.join(', ')
"#{@name}: [#{data}]\n"
end
end
end