Module: MetrixWire::Instrument::RackBuilder::Patch

Defined in:
lib/metrixwire/instrument/rack_builder.rb

Instance Method Summary collapse

Instance Method Details

#to_app ⇒ Object 



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# File 'lib/metrixwire/instrument/rack_builder.rb', line 25

def to_app
  app = super
  return app if app.nil?
  return app if defined?(::Rails) && ::Rails.respond_to?(:application) && ::Rails.application

  # Wrap once. Marking the built app prevents re-wrapping if to_app runs
  # more than once (e.g. nested builders).
  return app if app.instance_variable_get(:@__metrixwire_wrapped)

  wrapped = MetrixWire::Rack.new(app)
  wrapped.instance_variable_set(:@__metrixwire_wrapped, true)
  wrapped
rescue StandardError
  super
end