parsers.rb

class FirstParser
  def self.parse(url)
    parser = Inner.new(url)
    parser.parse
  end
  
  class Inner  
    def initialize(url)
      @url = url
    end
    
    def parse
      // do your parsing with @url
    end
  end
end


class SecondParser
  def self.parse(url)
    parser = Inner.new(url)
    parser.parse
  end
  
  class Inner  
    def initialize(url)
      @url = url
    end
    
    def parse
      // A different kind of parsing
    end
  end
end