112 lines
2.7 KiB
Ruby
112 lines
2.7 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Metrics
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module Sli
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COUNTER_PREFIX = 'gitlab_sli'
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module ClassMethods
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INITIALIZATION_MUTEX = Mutex.new
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def [](name)
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known_slis[name] || initialize_sli(name, [])
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end
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def initialize_sli(name, possible_label_combinations)
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INITIALIZATION_MUTEX.synchronize do
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next known_slis[name] if initialized?(name)
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sli = new(name)
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sli.initialize_counters(possible_label_combinations)
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known_slis[name] = sli
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end
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end
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def initialized?(name)
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known_slis.key?(name) && known_slis[name].initialized?
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end
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private
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def known_slis
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@known_slis ||= {}
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end
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end
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def self.included(mod)
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mod.extend(ClassMethods)
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end
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attr_reader :name
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def initialize(name)
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@name = name
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@initialized_with_combinations = false
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end
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def initialize_counters(possible_label_combinations)
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# This module is effectively an abstract class
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@initialized_with_combinations = possible_label_combinations.any? # rubocop:disable Gitlab/ModuleWithInstanceVariables
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possible_label_combinations.each do |label_combination|
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total_counter.get(label_combination)
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numerator_counter.get(label_combination)
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end
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end
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def increment(labels:, increment_numerator:)
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total_counter.increment(labels)
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numerator_counter.increment(labels) if increment_numerator
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end
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def initialized?
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@initialized_with_combinations
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end
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private
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def total_counter
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prometheus.counter(counter_name('total'), "Total number of measurements for #{name}")
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end
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def prometheus
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Gitlab::Metrics
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end
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class Apdex
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include Sli
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def increment(labels:, success:)
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super(labels: labels, increment_numerator: success)
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end
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private
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def counter_name(suffix)
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:"#{COUNTER_PREFIX}:#{name}_apdex:#{suffix}"
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end
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def numerator_counter
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prometheus.counter(counter_name('success_total'), "Number of successful measurements for #{name}")
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end
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end
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class ErrorRate
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include Sli
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def increment(labels:, error:)
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super(labels: labels, increment_numerator: error)
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end
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private
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def counter_name(suffix)
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:"#{COUNTER_PREFIX}:#{name}:#{suffix}"
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end
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def numerator_counter
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prometheus.counter(counter_name('error_total'), "Number of error measurements for #{name}")
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end
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end
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end
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end
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end
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