Persistence about finite_machine HOT 3 CLOSED

class Engine < FiniteMachine::Definition

GSM class is FiniteMachine::StateMachine
GSM current state is red
.gems/gems/finite_machine-0.10.1/lib/finite_machine/state_machine.rb:259:in `valid_state?': inappropriate current state 'red' (FiniteMachine::InvalidStateError)

require 'finite_machine'

class GenericStateMachine < FiniteMachine::Definition
  initial :red

  def initialize(light)
    puts "INITIALIZER WITH #{light}"
    super
    restore! light.state
    target light
  end

  events {
    event :start, :red => :green
    event :stop, :green => :red
  }

  callbacks {
    on_enter { |event| target.state = event.to }
  }
end

class Light
  attr_accessor :state
  def initialize
    state = 'green'
  end
  def to_s
    "Light in state #{state}"
  end
end

light = Light.new
gsm = GenericStateMachine.new(light)
puts "GSM class is #{gsm.class.to_s}"
puts "GSM current state is #{gsm.current}"
gsm.stop
puts "GSM state after stop is #{gsm.current}"
puts "Light state after stop is #{light.state}"

CREATING MACHINE with Light in state green
GSM class is FiniteMachine::StateMachine
GSM current state is green
GSM state after stop is red
Light state after stop is red

require 'finite_machine'

class LightMachineFactory
  def self.create_machine(light)
    FiniteMachine.define do
      puts "CREATING MACHINE with #{light}"
      initial light.state
      target light

      events {
        event :start, :red => :green
        event :stop, :green => :red
      }

      callbacks {
        on_enter { |event| target.state = event.to }
      }
    end
  end
end

class Light
  attr_accessor :state
  def initialize
    @state = 'green'
  end
  def to_s
    "Light in state #{state}"
  end
  def state
    @state.to_sym
  end
end

light = Light.new
gsm = LightMachineFactory.create_machine(light)
puts "GSM class is #{gsm.class.to_s}"
puts "GSM current state is #{gsm.current}"
gsm.stop
puts "GSM state after stop is #{gsm.current}"
puts "Light state after stop is #{light.state}"