问带有EventMachine模块的实例变量

EN

require 'ruby-mpd'
require 'eventmachine'

class RB3Jay < EM::Connection
  def initialize(mpd)
    @mpd = mpd
  end

  def receive_data
    # do stuff with @mpd
  end

  def self.start
    mpd = MPD.new
    mpd.connect

    EventMachine.run do
      EventMachine.start_server("127.0.0.1", 7331, RB3Jay, mpd)
    end
  end
end

RB3Jay.start

require 'ruby-mpd'
require 'singleton'

class Mdp
  include Singleton
  attr_reader :mpd

  def start_mpd
    @mpd = MPD.new
    @mpd.connect
  end
end

module RB3Jay
  def self.start
    Mdp.instance.start_mdp
    EventMachine.run{ EventMachine.start_server '127.0.0.1', 7331, self }
  end
end

class Klass
  extend RB3Jay

  def receive_data
    Mdp.instance.mpd
  end
end