response_writer.rb

class ResponseWriter

  def write(customer, serialize, write)
    write.call(serialize.call(customer))
  end

end

customer = Customer.new("Mr", "Jason", "Gorman")
writer = ResponseWriter.new
writer.write(customer, method(:to_html), lambda {|o| ConsoleWriter.new().write(o)})
writer.write(customer, method(:to_xml), lambda {|o| LogFileWriter.new("C:\test\testlog.txt").write(o)})
writer.write(customer, method(:to_string), lambda {|o| NoSqlWriter.new(
    "mongodb",
    "localhost",
    "admin",
    "password123").write(o)})