external_notification_processor.rb

# Decides how to further process an external notification once we become aware of it.
#
# Translates a notification to a type, decides what to do, and dispatches further down the chain.
#
# @see ExternalNotification
# @see OrderProcessor
class ExternalNotificationProcessor
end

new_order_processor.rb

# Decides how to further process an order once we become aware of it.
#
# Translates order details into our domain and dispatches to a more specialised processor.
#
# @see OrderInitializer
class NewOrderProcessor
end

order_processor.rb

# Deals with external order notifications and delegates processing to the appropriate dispatcher.
#
# @see NewOrderProcessor
class OrderProcessor
end