Class: TwemproxyExporter::Counter

Inherits:
Object
  • Object
show all
Defined in:
lib/twemproxy_exporter/counter.rb

Instance Method Summary collapse

Constructor Details

#initialize(registry, name, desc) ⇒ Counter

Returns a new instance of Counter.



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# File 'lib/twemproxy_exporter/counter.rb', line 3

def initialize(registry, name, desc)
  @counter = Prometheus::Client::Counter.new(name, desc)
  registry.register(@counter)
  @last_values = {}
end

Instance Method Details

#count(value, labels = {}) ⇒ Object 



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# File 'lib/twemproxy_exporter/counter.rb', line 9

def count(value, labels = {})
  last = @last_values[labels] || 0
  if value >= last
    @counter.increment(labels, value - last)
  else
    @counter.increment(labels, value)
  end
  @last_values[labels] = value
end

#value(labels = {}) ⇒ Object 



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# File 'lib/twemproxy_exporter/counter.rb', line 19

def value(labels = {})
  @counter.get(labels)
end