Class: DatashiftJourney::Journey::MachineBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/datashift_journey/journey/machine_builder.rb

Overview

N.B This gem is based on the AR integration which uses the Machine name for the Column storing the state in The default name and column is :state

Class Method Summary collapse

Class Method Details

.create_journey_plan(args = {}, &block) ⇒ Object

The available API is defined in : ../state_machines/planner.rb

DatashiftJourney::Journey::MachineBuilder.create_journey_plan(initial: :deployment) do
    sequence [:deployment,
              :default_predicator,
              :version,
              :launch]
end

Args

:machine_name => :something_different     # Requires Class has a string column also called something_different
:initial => :first_state



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# File 'lib/datashift_journey/journey/machine_builder.rb', line 22

def self.create_journey_plan(args = {}, &block)
  DatashiftJourney.journey_plan_class.send :include, DatashiftJourney::StateMachines::Extensions
  DatashiftJourney.journey_plan_class.send :extend,  DatashiftJourney::StateMachines::Extensions

  create_journey_plan_for(DatashiftJourney.journey_plan_class, args, &block)
end

.create_journey_plan_for(klass, args = {}, &block) ⇒ Object

Args

:machine_name => :something_different     # Requires Class has a column called something_different
:initial => :first_state



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# File 'lib/datashift_journey/journey/machine_builder.rb', line 33

def self.create_journey_plan_for(klass, args = {}, &block)
  machine_name = args.key?(:machine_name) ? args.delete(:machine_name) : :state

  puts "Building journey plan State Machine [#{machine_name}] for [#{klass}]"

  machine = if block_given?
              klass.class_eval do
                state_machine machine_name, args do

                  init_plan

                  instance_eval(&block) # sets the context to be StateMachine class'

                  # Journey has been pre parsed, we have the states, - now build navigation events and transitions
                  instance_eval('build_journey_plan')
                end
              end
            else
              ::StateMachines::Machine.new(klass, machine_name, args)
            end
  machine
end