75 lines
2.3 KiB
Ruby
75 lines
2.3 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
# rubocop:disable Style/ClassVars
|
|
|
|
module Gitlab
|
|
module Metrics
|
|
module Methods
|
|
extend ActiveSupport::Concern
|
|
|
|
included do
|
|
@@_metric_provider_mutex ||= Mutex.new
|
|
@@_metrics_provider_cache = {}
|
|
end
|
|
|
|
class_methods do
|
|
def reload_metric!(name)
|
|
@@_metrics_provider_cache.delete(name)
|
|
end
|
|
|
|
private
|
|
|
|
def define_metric(type, name, opts = {}, &block)
|
|
if respond_to?(name)
|
|
raise ArgumentError, "method #{name} already exists"
|
|
end
|
|
|
|
define_singleton_method(name) do
|
|
# inlining fetch_metric method to avoid method call overhead when instrumenting hot spots
|
|
@@_metrics_provider_cache[name] || init_metric(type, name, opts, &block)
|
|
end
|
|
end
|
|
|
|
def fetch_metric(type, name, opts = {}, &block)
|
|
@@_metrics_provider_cache[name] || init_metric(type, name, opts, &block)
|
|
end
|
|
|
|
def init_metric(type, name, opts = {}, &block)
|
|
options = ::Gitlab::Metrics::Methods::MetricOptions.new(opts)
|
|
options.evaluate(&block)
|
|
|
|
if disabled_by_feature(options)
|
|
synchronized_cache_fill(name) { NullMetric.instance }
|
|
else
|
|
synchronized_cache_fill(name) { build_metric!(type, name, options) }
|
|
end
|
|
end
|
|
|
|
def synchronized_cache_fill(key)
|
|
@@_metric_provider_mutex.synchronize do
|
|
@@_metrics_provider_cache[key] ||= yield
|
|
end
|
|
end
|
|
|
|
def disabled_by_feature(options)
|
|
options.with_feature && !::Feature.enabled?(options.with_feature, type: :ops)
|
|
end
|
|
|
|
def build_metric!(type, name, options)
|
|
case type
|
|
when :gauge
|
|
::Gitlab::Metrics.gauge(name, options.docstring, options.base_labels, options.multiprocess_mode)
|
|
when :counter
|
|
::Gitlab::Metrics.counter(name, options.docstring, options.base_labels)
|
|
when :histogram
|
|
::Gitlab::Metrics.histogram(name, options.docstring, options.base_labels, options.buckets)
|
|
when :summary
|
|
raise NotImplementedError, "summary metrics are not currently supported"
|
|
else
|
|
raise ArgumentError, "uknown metric type #{type}"
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|