sample_em_connection.rb

require "eventmachine"
require "net/http"

clients = 100
HOST = "localhost"
PORT = 4567

class Client < EM::Connection
  attr_accessor :client_id

  def initialize(args)
    super
    @client_id = args[:client_id].to_s
  end

  def post_init
    Net::HTTP.start(HOST, PORT) do |http|
      http.get("/login.json?id=#{client_id}")
    end

    EM.add_periodic_timer(1) do
      Net::HTTP.start("localhost", 4567) do |http|
        http.get("/update.json?id=#{client_id}")
      end
    end
  end
end

EM.run do
  clients.times do |i|
    EM::connect(HOST, PORT, Client, :client_id => i)
  end
end