Issue I'm having with celluloid and FSM

01_script_output

jruby-1.6.7 :002 > require './person'
 => true 
jruby-1.6.7 :003 > p=Person.new 'Kristen'
 => <Person @name=Kristen @age=0> 
jruby-1.6.7 :004 > p.machine
 => #<Person::Machine:0x1f48b272 @state=:living, @actor=<Person @name=Kristen @age=0>> 
jruby-1.6.7 :005 > p.machine.transition(:aging)
 => nil 
jruby-1.6.7 :006 > p.machine
 => #<Person::Machine:0x1f48b272> 

02_complaint.md

See how the machine lacks any state or actor info after the transition?

03_person.rb

require 'rubygems'
require 'bundler/setup'
require 'celluloid'

class Person
  include Celluloid

  def self.max_age
    15
  end

  # State machine to manage lifecycle
  class Machine
    include Celluloid::FSM

    default_state :living

    state :aging, :to => [:living, :dead] do
      actor.get_older
      if actor.too_old?
        transition :dead
      else
        transition :living
      end
    end

    state :dead do
      puts "oops I'm dead"
    end
  end

  def initialize name
    @name = name
    @age  = 0

    @machine = Machine.new
  end

  attr_reader   :name
  attr_accessor :age
  attr_reader   :machine

  def to_s
    "#{name}: #{age} years old"
  end

  def get_older(years=1)
    @age += years
  end

  def too_old?
    @age > Person.max_age
  end

  def inspect
    "<Person @name=#{@name} @age=#{@age}>"
  end
end

if __FILE__ == $0
  puts 'making josh'
  p = Person.new "Josh Adams"
  puts p
  puts p.machine
  p.machine.transition(:aging)
  puts p
  puts p.machine
end