Module: Legion::Metrics

Defined in:
lib/legion/metrics.rb

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.registry ⇒ Object (readonly)

Returns the value of attribute registry.



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# File 'lib/legion/metrics.rb', line 18

def registry
  @registry
end

Class Method Details

.available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/legion/metrics.rb', line 6

def available?
  defined?(Prometheus::Client) ? true : false
end

.refresh_gauges ⇒ Object 



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# File 'lib/legion/metrics.rb', line 26

def refresh_gauges
  return unless available?

  @metrics[:uptime].set(::Process.clock_gettime(::Process::CLOCK_MONOTONIC))
  refresh_active_workers
  refresh_rolling_window
end

.render ⇒ Object 



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# File 'lib/legion/metrics.rb', line 20

def render
  return '' unless available?

  Prometheus::Client::Formats::Text.marshal(@registry)
end

.reset! ⇒ Object 



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# File 'lib/legion/metrics.rb', line 34

def reset!
  @registry = nil
  @metrics  = nil
  @listeners&.each { |name, block| Legion::Events.off(name, block) if defined?(Legion::Events) }
  @listeners = {}
end

.setup ⇒ Object 



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# File 'lib/legion/metrics.rb', line 10

def setup
  return unless available?

  init_registry
  init_metrics
  register_event_listeners
end