Module: Metrics::Instrumentable::ClassMethods

Defined in:
lib/metrics/instrumentable.rb

Instance Method Summary collapse

Instance Method Details

#instrument(*methods) ⇒ Object

Public: Wraps the method with a call to instrument the duration of the method. Fancy!

Example

def some_method
  do_something_taxing
end

instrument :some_method
# => 'source=app measure.some_method=10s'

Returns nothing.



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# File 'lib/metrics/instrumentable.rb', line 57

def instrument(*methods)
  methods.each do |name|
    visibility = %w[public private protected].find { |visibility| send :"#{visibility}_method_defined?", name }
    method = instance_method(name)
    define_method name do |*args, &block|
      bound_method = method.bind(self)
      instrument [self.class.metric_namespace, name].join('.') do
        bound_method.call(*args, &block)
      end
    end
    send visibility, name
  end
end

#metric_namespace ⇒ Object

Internal: Used internally to specify the namespace for method instrumentation.

Override this in your class if you need it to be something different.

Example

module Some

class Namespace
  include Metrics::Instrumentable

  def long_method; end
  instrument :long_method
end

end

Some::Namespace.metric_namespace # => ‘some.namespace’

Some::Namespace.new.long_method # => ‘source=app measure.some.namespace.long_method=10s’

Returns a String namespace for the metric.



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# File 'lib/metrics/instrumentable.rb', line 40

def metric_namespace
  to_s.gsub(/::/, '.').underscore
end