Class: MeterBox::Configuration

Inherits:
Object
  • Object
show all
Defined in:
lib/meter_box/configuration.rb

Overview

Mutation methods (meter, freeze!, reset!) require the caller to hold MeterBox’s Mutex. fetch is lock-free — @meters is never mutated after freeze!.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Configuration

Returns a new instance of Configuration.



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# File 'lib/meter_box/configuration.rb', line 7

def initialize
  reset!
end

Instance Method Details

#fetch(name) ⇒ Object 



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# File 'lib/meter_box/configuration.rb', line 16

def fetch(name)
  @meters.fetch(name.to_sym) do
    raise UnknownMeter, "no meter registered as '#{name}'"
  end
end

#freeze ⇒ Object

Raises:

  • (NoMethodError) 


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# File 'lib/meter_box/configuration.rb', line 26

def freeze
  raise NoMethodError, "use MeterBox::Configuration#freeze! to lock the registry"
end

#freeze! ⇒ Object 



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# File 'lib/meter_box/configuration.rb', line 22

def freeze!
  @frozen = true
end

#meter(name, dimensions: {}, aggregation: :sum) ⇒ Object

Raises:



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# File 'lib/meter_box/configuration.rb', line 11

def meter(name, dimensions: {}, aggregation: :sum)
  raise ConfigurationFrozen, "MeterBox configuration is frozen" if @frozen
  @meters[name.to_sym] = Meter.new(name: name, dimensions: dimensions, aggregation: aggregation)
end

#reset! ⇒ Object 



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# File 'lib/meter_box/configuration.rb', line 30

def reset!
  @meters = {}
  @frozen = false
end