class Nifty::Event::Converter

Converts appliances into events

@author Michal Kimle

Public Class Methods

convert_appliance(appliance, backend, transfer_method, parameters) click to toggle source

Converts appliance into event

@param [Cloud::Appliance::Descriptor::Appliance] appliance @param [Nifty::Backend] backend @param [Nifty::TransferMethod] transfer_method @param [Hash] parameters @raise [Nifty::Errors::Event::ConverterError] when something goes wrong while conversion @return [Nifty::Event] description of returned object

# File lib/nifty/event/converter.rb, line 13
def self.convert_appliance(appliance, backend, transfer_method, parameters)
  events_module = "Nifty::Events::#{backend.name.demodulize}".constantize

  logger.debug "Converting appliance #{appliance.inspect}"
  event_type = "#{appliance.action}_event".camelize

  fail Nifty::Errors::Event::ConverterError, "No such event type for action #{appliance.action.inspect}" unless events_module.constants.include?(event_type.to_sym)
  event_class = events_module.const_get(event_type)

  fail Nifty::Errors::Event::ConverterError, "Class #{event_class.inspect} doesn't represent an event" unless (event_class.respond_to?('event?') && event_class.event? && event_class.public_instance_methods.include?(:run))

  event = backend.create_event(event_class, appliance, transfer_method, parameters)
  logger.debug "Converted event: #{event.inspect}"

  event
end