jfacoustic
We’re trying to implement a user onboarding path that needs to be able to reverse to the last state on failure.
We’ve found a few libraries that could be potential solutions, however they seem relatively inactive. We considered using Sage, which implements the saga pattern, as well as a few state machine libraries: fsmx and machinery. Fsmx seems to be the most active library as of now.
Do you normally use one of these (or a similar) library, or do you implement it using gen_statem or gen_fsm?
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jfacoustic
Fsmx is pretty awesome. I think we’ll go with that.
mpope
I personally would reach for gen_statem, if the steps are relatively simple. Its a matter of returning
next_stateorkeep_stateand replying to acallwith an appropriate error if validation fails.gen_fsmis deprecated.