Job pattern to demonstrate how to de-couple a potentially long-running action from the user requesting that action.
In our example, let's use a trivial example of translating a text phrase. The user submits a phrase and receives a Job id. She can use that id to see the status of her job (Pending/Complete/Failed) and get the results.
In the real world, this job may do some complicated/time-consuming OCR, file manipulation, data aggregation, etc.