Custom async classes

[Gavin Joyce]

What is the best approach for execution a number of custom classes in parellel? If API1..3 are custom classes that HTTP GET or POST and parse the response, what should they inherit from?

EM::MultiRequest.new

   API1.new.execute()

   API2.new.execute()

   API3.new.execute()

   multi.callback do

      #process all API responses here

   end

end

[Oskar Szrajer]

Celluloid?

[Gavin Joyce]

I've got it working with EM:Deferrable. Is this the correct approach for goliath or is another technique preferred?

require 'goliath'

require 'em-synchrony/em-http'

class GetLength

  include EM::Deferrable

  attr_accessor :data

  def execute(url)

    req = EM::HttpRequest.new(url).aget

    req.callback do

      @data = req.response.length.to_s

      succeed()

    end

    req.errback { fail }

    self

  end

  

end

class Hello < Goliath::API

  def response(env)

    multi = EventMachine::Synchrony::Multi.new

    multi.add :google, GetLength.new.execute('http://www.google.ie/')

    multi.add :yahoo, GetLength.new.execute('http://www.yahoo.com/')

    

    response = multi.perform.responses[:callback]

    [200, {}, {

      :google =>  response[:google].data,

      :yahoo =>  response[:yahoo].data

    }]

  end

end

[Ilya Grigorik]

Yep, looks good.