Class: Appsignal::Hooks::ActiveSupportNotificationsHook Private

Inherits:
Hook
  • Object
show all
Defined in:
lib/appsignal/hooks/active_support_notifications.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Constant Summary collapse

BANG =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

"!".freeze

Instance Method Summary collapse

Methods inherited from Hook

#initialize, #installed?, register, #try_to_install

Constructor Details

This class inherits a constructor from Appsignal::Hooks::Hook

Instance Method Details

#dependencies_present? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/appsignal/hooks/active_support_notifications.rb', line 11

def dependencies_present?
  defined?(::ActiveSupport::Notifications::Instrumenter)
end

#install ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/appsignal/hooks/active_support_notifications.rb', line 15

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

      if instrument_this
        transaction = Appsignal::Transaction.current
        transaction.start_event
      end

      instrument_without_appsignal(name, payload, &block)
    ensure
      if instrument_this
        title, body, body_format = Appsignal::EventFormatter.format(name, payload)
        transaction.finish_event(
          name.to_s,
          title,
          body,
          body_format
        )
      end
    end
  end
end