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Contents
# encoding: UTF-8
require 'prometheus/client/metric'
module Prometheus
module Client
# Summary is an accumulator for samples. It captures Numeric data and
# provides the total count and sum of observations.
class Summary < Metric
def type
:summary
end
# Records a given value.
def observe(value, labels: {})
base_label_set = label_set_for(labels)
@store.synchronize do
@store.increment(labels: base_label_set.merge(quantile: "count"), by: 1)
@store.increment(labels: base_label_set.merge(quantile: "sum"), by: value)
end
end
# Returns a hash with "sum" and "count" as keys
def get(labels: {})
base_label_set = label_set_for(labels)
internal_counters = ["count", "sum"]
@store.synchronize do
internal_counters.each_with_object({}) do |counter, acc|
acc[counter] = @store.get(labels: base_label_set.merge(quantile: counter))
end
end
end
# Returns all label sets with their values expressed as hashes with their sum/count
def values
v = @store.all_values
v.each_with_object({}) do |(label_set, v), acc|
actual_label_set = label_set.reject{|l| l == :quantile }
acc[actual_label_set] ||= { "count" => 0.0, "sum" => 0.0 }
acc[actual_label_set][label_set[:quantile]] = v
end
end
private
def reserved_labels
[:quantile]
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems