Class: HoneycombRails::Subscribers::ProcessAction

Inherits:
Object
  • Object
show all
Includes:
Sampling
Defined in:
lib/honeycomb-rails/subscribers/process_action.rb

Instance Method Summary collapse

Methods included from Sampling

#sample_event_if_required

Constructor Details

#initialize(libhoney) ⇒ ProcessAction

Returns a new instance of ProcessAction.



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# File 'lib/honeycomb-rails/subscribers/process_action.rb', line 12

def initialize(libhoney)
  @libhoney = libhoney
end

Instance Method Details

#call(*args) ⇒ Object 



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# File 'lib/honeycomb-rails/subscribers/process_action.rb', line 22

def call(*args)
  event = ::ActiveSupport::Notifications::Event.new(*args)

  # These are the keys we're interested in! Skipping noisy keys (:headers, :params) for now.
  data = event.payload.slice(:controller, :action, :method, :path, :format,
                            :status, :db_runtime, :view_runtime,
                            :exception, :exception_object)

  if request_id = event.payload[:headers][:'action_dispatch.request_id']
    data[:request_id] = request_id
  end

  # Massage data to return "all" as the :format if not set
  if !data[:format] || data[:format] == "format:*/*"
    data[:format] = "all"
  end

  # strip off exception fields for more friendly formatting
  exception_info = data.delete(:exception)
  exception = data.delete(:exception_object)

  if exception_info
    exception_class, exception_message = exception_info

    # Apparently these notifications don't include the `status` field if
    # an exception occurred while handling the request, even though the
    # response certainly does end up with a status code set. We'd like to
    # report that status code, so we reuse the same status code lookup
    # table that ActionController uses. This looks janky, but it's how the
    # standard Rails logging does it too... :|
    #
    # https://github.com/rails/rails/blob/37b373a8d2a1cd132bbde51cd5a3abd4ecee433b/actionpack/lib/action_controller/log_subscriber.rb#L27
    data[:status] ||= ActionDispatch::ExceptionWrapper.status_code_for_exception(exception_class)

    if HoneycombRails.config.capture_exceptions
      data[:exception_class] = exception_class
      data[:exception_message] = exception_message

      if exception && HoneycombRails.config.capture_exception_backtraces
        data[:exception_source] = ::Rails.backtrace_cleaner.clean(exception.backtrace)
      end

    end
  end

  # Pull top-level attributes off of the ActiveSupport Event.
  data[:duration_ms] = event.duration

  # Add anything we added in our controller-level instrumentation (see
  # overrides/action_controller_instrumentation.rb)
  if event.payload.key?(Constants::EVENT_METADATA_KEY)
    data.merge!(event.payload[Constants::EVENT_METADATA_KEY])
  end

  honeycomb_event = @libhoney.event
  honeycomb_event.add(data)

  sample_event_if_required(honeycomb_event, event)

  honeycomb_event.send
end

#subscribe! ⇒ Object 



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# File 'lib/honeycomb-rails/subscribers/process_action.rb', line 16

def subscribe!
  ::ActiveSupport::Notifications.subscribe(/process_action.action_controller/) do |*args|
    call(*args)
  end
end