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Versions: 13
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Contents
# frozen_string_literal: true
module PrometheusExporter::Metric
class Gauge < Base
attr_reader :data
def initialize(name, help)
if name.end_with?("_total")
raise ArgumentError, "The metric name of gauge must not have _total suffix. Given: #{name}"
end
super
reset!
end
def type
"gauge"
end
def metric_text
@data.map do |labels, value|
"#{prefix(@name)}#{labels_text(labels)} #{value}"
end.join("\n")
end
def reset!
@data = {}
end
def to_h
@data.dup
end
def remove(labels)
@data.delete(labels)
end
def observe(value, labels = {})
if value.nil?
data.delete(labels)
else
if !(Numeric === value)
raise ArgumentError, 'value must be a number'
end
@data[labels] = value
end
end
alias_method :set, :observe
def increment(labels = {}, value = 1)
@data[labels] ||= 0
@data[labels] += value
end
def decrement(labels = {}, value = 1)
@data[labels] ||= 0
@data[labels] -= value
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems