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Contents
# encoding: UTF-8
require 'quantile'
require 'prometheus/client/metric'
module Prometheus
module Client
# Summary is an accumulator for samples. It captures Numeric data and
# provides an efficient quantile calculation mechanism.
class Summary < Metric
extend Gem::Deprecate
# Value represents the state of a Summary at a given point.
class Value < Hash
attr_accessor :sum, :total
def initialize(estimator)
@sum = estimator.sum
@total = estimator.observations
estimator.invariants.each do |invariant|
self[invariant.quantile] = estimator.query(invariant.quantile)
end
end
end
def type
:summary
end
# Records a given value.
def observe(labels, value)
label_set = label_set_for(labels)
synchronize { @values[label_set].observe(value) }
end
alias add observe
deprecate :add, :observe, 2016, 10
# Returns the value for the given label set
def get(labels = {})
@validator.valid?(labels)
synchronize do
Value.new(@values[labels])
end
end
# Returns all label sets with their values
def values
synchronize do
@values.each_with_object({}) do |(labels, value), memo|
memo[labels] = Value.new(value)
end
end
end
private
def default
Quantile::Estimator.new
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems