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module God
module Conditions
# This condition degrades its interval by a factor of two for 3 tries before failing
class DegradingLambda < PollCondition
attr_accessor :lambda
def initialize
super
@tries = 0
end
def valid?
valid = true
valid &= complain("Attribute 'lambda' must be specified", self) if self.lambda.nil?
valid
end
def test
puts "Calling test. Interval at #{self.interval}"
@original_interval ||= self.interval
unless pass?
if @tries == 2
self.info = "lambda condition was satisfied"
return true
end
self.interval = self.interval / 2.0
@tries += 1
else
@tries = 0
self.interval = @original_interval
end
self.info = "lambda condition was not satisfied"
false
end
private
def pass?
begin
Timeout::timeout(@interval) {
self.lambda.call()
}
rescue Timeout::Error
false
end
end
end
end
end
|
