class Appsignal::Hooks::ActiveSupportNotificationsHook

def install
  ::ActiveSupport::Notifications.class_eval do
    def self.instrument(name, payload = {})
      # Don't check the notifier if any subscriber is listening:
      # AppSignal is listening
      instrumenter.instrument(name, payload) do
        yield payload if block_given?
      end
    end
  end
  ::ActiveSupport::Notifications::Instrumenter.class_eval do
    alias instrument_without_appsignal instrument
    def instrument(name, payload = {}, &block)
      # Events that start with a bang are internal to Rails
      instrument_this = name[0] != BANG
      Appsignal::Transaction.current.start_event if instrument_this
      instrument_without_appsignal(name, payload, &block)
    ensure
      if instrument_this
        title, body, body_format = Appsignal::EventFormatter.format(name, payload)
        Appsignal::Transaction.current.finish_event(
          name.to_s,
          title,
          body,
          body_format
        )
      end
    end
  end
end