Class: Contrast::Framework::Rails::Patch::ActionControllerLiveBuffer

Inherits:
Object
  • Object
show all
Defined in:
lib/contrast/framework/rails/patch/action_controller_live_buffer.rb

Overview

This class acts as our patch into the ActionController::Live::Buffer class, allowing us to track the close event on streamed responses.

Class Method Summary collapse

Class Method Details

.instrument ⇒ Object 



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# File 'lib/contrast/framework/rails/patch/action_controller_live_buffer.rb', line 20

def instrument
  @_instrument ||= begin
    ::ActionController::Live::Buffer.class_eval do
      # normally pre->in->post filters are applied however, in a streamed response
      # we can run into a case where it's pre -> in -> post -> more infilters
      # in order to submit anything found during the infilters after the response has
      # been written we need to explicitly send them
      alias_method :cs__close, :close
      def close
        Contrast::Framework::Rails::Patch::ActionControllerLiveBuffer.send_messages
        cs__close
      end
    end
    true
  end
end

.send_messages ⇒ Object 



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# File 'lib/contrast/framework/rails/patch/action_controller_live_buffer.rb', line 12

def send_messages
  return unless (context = Contrast::Agent::REQUEST_TRACKER.current)

  [context.server_activity, context.activity, context.observed_route].each do |msg|
    Contrast::Agent.messaging_queue.send_event_immediately(msg)
  end
end