Generic FSMs in Erlang

Good stuff. Compared to the more "popular" generic behaviours like gen_server, gen_fsm doesn't get a lot of attention. It's nice to see it added to your tutorial with this level of detail.

Author, here. I hope you enjoy.

I prefer name-brand flying spaghetti monsters actually.

Too bad the new "Erlang and OTP in Action" book leaves gen_fsm out of scope.<p>Anyway gen_fsm behavior is pretty weak comparing to FSM frameworks I used in C++: no on_entry / on_exit callbacks.<p>Also, I'm not sure you can use gen_fsm sequentially by itself (i.e. without Erlang process).

Great stuff. I was just arguing on the ErlangCamp mailing list that the gen_fsm behaviour is great! I just sent this out to everyone.