Module: Promenade::Prometheus

Extended by:
ActiveSupport::Concern
Defined in:
lib/promenade/prometheus.rb

Defined Under Namespace

Classes: Options

Constant Summary collapse

REGISTRY_MUTEX = 
Mutex.new
METRICS_MUTEX = 
Mutex.new

Class Method Summary collapse

Class Method Details

.define_metric(type, name, &block) ⇒ Object 



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# File 'lib/promenade/prometheus.rb', line 19

def self.define_metric(type, name, &block)
  METRICS_MUTEX.synchronize do
    return if registry.get(name)

    options = Options.new
    options.evaluate(&block)
    registry.method(type).call(name, *options.args(type))
  end
end

.metric(name) ⇒ Object 



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# File 'lib/promenade/prometheus.rb', line 12

def self.metric(name)
  METRICS_MUTEX.synchronize do
    registry.get(name) ||
      fail("No metric defined for: #{name}, you must define a metric before using it")
  end
end

.registry ⇒ Object 



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# File 'lib/promenade/prometheus.rb', line 29

def self.registry
  REGISTRY_MUTEX.synchronize do
    @_registry ||= ::Prometheus::Client.registry
  end
end