Some of the exercises and example code from Dave Thomas's Programming Elixir >= 1.6
Server exercises (Chapter 17)
- sequence-old and seqnumbers implement the simple number counter. sequence implments the counter with supervisors. sequence-otp implements the OTP application and the deployment sequence.
- sequence-old contains the API code and server implmentation in a single file (server.ex). Since it contains the orginal implementation (not using private functions) it can be called directly with pid (
GenServer.call(pid, :next)orGenServer.cast(pid, {:increment_number, 200})) or using the external API (Sequence.Server.next_numberorSequence.Server.increment_number(200)). - seqnumbers contains the three-layer implemention: API in seqnumbers.ex, business logic in seqnumbers/impl.ex, and server interface to the logic in seqnumbers/server.ex. It uses the API (
Seqnumbers.next_numberorSeqnumbers.increment_number 200), but the implementation can be called directly during development/testing, as well as through the server. - stack-old implements the client API and server callbacks in the lib/stack/erver.ex file. stack uses supervisors.
- sequence-otp implements the initial OTP application and the different versions of the deployment sequence. Each deployment version is on a git branch:
- main: the original OTP server
- v0: the first release
- v1: the second release (change output message - no change in server state)
- v2: the third release (sequence increment - change in server state)