From: "Artūras Šlajus" <x11@...>
Date: 2009-05-18T06:52:17+09:00
Subject: EventMachine or GServer?

I wrote my nifty server in GServer, but just stumbled on EventMachine.
Is EM better than my GServer implementation (i guess it is :))

class GameServer < GServer
  def initialize(*args)
    super(*args)
  end

  def serve(io)
    log "Registering #{io} to Dispatcher."
    dispatcher = Dispatcher.singleton
    dispatcher.register io

    loop do
      begin
        log "Reading from #{io}"
        str = nil
        Timeout.timeout(CONFIG['read_timeout']) { str = io.gets }
        until str.nil?
          str.strip!
          dispatcher.receive io, JSON.load(str)

          Timeout.timeout(CONFIG['read_timeout']) { str = io.gets }
        end
      rescue Timeout::Error
      end

      log "Dispatching outgoing messages..."
      dispatcher.each_outgoing_for(io) do |message|
        io.write JSON.dump(message)
        io.write "\n"
        io.flush
      end

      log "Sleeping..."
      sleep CONFIG['sleep_timeout']
    end
  rescue JSON::ParserError
    io.write "Unknown protocol, aborting.\n"
  rescue Exception => e
    log "Exception for #{io}: #{e.inspect}"
  end
end
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