Module: ScoutRails::Instruments::ActionControllerInstruments

Defined in:
lib/scout_rails/instruments/rails/action_controller_instruments.rb,
lib/scout_rails/instruments/rails3/action_controller_instruments.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(instrumented_class) ⇒ Object 



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# File 'lib/scout_rails/instruments/rails/action_controller_instruments.rb', line 3

def self.included(instrumented_class)
  ScoutRails::Agent.instance.logger.debug "Instrumenting #{instrumented_class.inspect}"
  instrumented_class.class_eval do
    unless instrumented_class.method_defined?(:perform_action_without_scout_instruments)
      alias_method :perform_action_without_scout_instruments, :perform_action
      alias_method :perform_action, :perform_action_with_scout_instruments
      private :perform_action
    end
  end
end

Instance Method Details

#perform_action_with_scout_instruments(*args, &block) ⇒ Object

In addition to instrumenting actions, this also sets the scope to the controller action name. The scope is later applied to metrics recorded during this transaction. This lets us associate ActiveRecord calls with specific controller actions.



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# File 'lib/scout_rails/instruments/rails/action_controller_instruments.rb', line 17

def perform_action_with_scout_instruments(*args, &block)
  scout_controller_action = "Controller/#{controller_path}/#{action_name}"
  self.class.trace(scout_controller_action, :uri => request.request_uri) do
    perform_action_without_scout_instruments(*args, &block)
  end
end

#process_action(*args) ⇒ Object

Instruments the action and tracks errors.



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# File 'lib/scout_rails/instruments/rails3/action_controller_instruments.rb', line 5

def process_action(*args)
  scout_controller_action = "Controller/#{controller_path}/#{action_name}"
  #ScoutRails::Agent.instance.logger.debug "Processing #{scout_controller_action}"
  self.class.trace(scout_controller_action, :uri => request.fullpath) do
    begin
      super
    rescue Exception => e
      ScoutRails::Agent.instance.store.track!("Errors/Request",1, :scope => nil)
      raise
    ensure
      Thread::current[:scout_scope_name] = nil
    end
  end
end