Spree re-order and re-payment of products

I am working on subscription based products. Is it possible to re-order (re-purchase) the products and then manually detect the payment of that order from the back-end?

In the spree developer guide I found this link http://ift.tt/1IL94RC which shows something like this:

  payment = Spree::Order.find(:id).payments.first
  payment.send(:purchase)

Could this action fulfill my requirement?