gistfile1.rb

class Socket < Rack::WebSocket::Application

  def self.connections
    @connections ||= []
  end
  
  def self.send_to_all(message)
    @connections.each {|connection| connection.send_data(message)
  end
  
  def on_open(env)
    self.class.connections << self
  end
  
  def on_close(env)
    self.class.connection.delete(self)
  end
  
end