Class: Fluent::Plugin::Prometheus::Summary

Inherits:
Metric
  • Object
show all
Defined in:
lib/fluent/plugin/prometheus.rb

Instance Attribute Summary

Attributes inherited from Metric

#desc, #key, #name, #retention, #retention_check_interval, #type

Instance Method Summary collapse

Methods inherited from Metric

get, #has_retention?, #instrument, #labels, #remove_expired_metrics, #set_value?

Constructor Details

#initialize(element, registry, labels) ⇒ Summary

Returns a new instance of Summary.



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# File 'lib/fluent/plugin/prometheus.rb', line 357

def initialize(element, registry, labels)
  super
  if @key.nil?
    raise ConfigError, "summary metric requires 'key' option"
  end

  begin
    @summary = registry.summary(element['name'].to_sym, docstring: element['desc'], labels: @base_labels.keys)
  rescue ::Prometheus::Client::Registry::AlreadyRegisteredError
    @summary = Fluent::Plugin::Prometheus::Metric.get(registry, element['name'].to_sym, :summary, element['desc'])
  end
end

Instance Method Details

#set_value(value, labels) ⇒ Object 



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# File 'lib/fluent/plugin/prometheus.rb', line 378

def set_value(value, labels)
  @summary.observe(value, labels: labels)
end

#value(record) ⇒ Object 



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# File 'lib/fluent/plugin/prometheus.rb', line 370

def value(record)
  if @key.is_a?(String)
    record[@key]
  else
    @key.call(record)
  end
end