I’m trying to wrap my head around this, and looking for suggestions:
In ordinary operation, our system calls upon several external web
services to gather info – these steps can take a while and we want to
give our users feedback on what’s happening.
My hunch is that a state-driven model, using AASM or equivalent, is a
good start. What I’d like is a general mechanism that notifies the user
(“preheating the oven”, “beating the eggs”, “folding in the dry
Aside from the fact that I’ve never written a line of AJAX in my life,
I’m not sure how to partition the functionality. Perhaps I should
create a callback-style hook in the model so a view can express interest
in being notified? (But then what happens when the view isn’t actually
Mostly, it I suspect this is a common problem many others have solved
already. I’d welcome suggestions or pointers.