How do you I get a batch job running in 2009 and upgrade it to 2012.

I have batch Job running in AX 2009 and my company decided to upgrade to AX 2012. So now i need to move this batch job as well. It basically deals with communicating with a website (an intermediate) to take orders placed in amazon and then send back shipment confirmation to amazon through this website.

It has a class and several methods in DAX which i created associated with it which helps its accomplish this task.