Rps
GenServer under the microscope
Intro
The aim of this tutorial is to show some day to day techniques that can be used when working with generic servers. The codebase we will be working on is written in Elixir, but techniques can be applied to other BEAM languages as well.
The project requires Elixir >= 1.6.0.
After cloning the repository, we can checkout the starter branch and run:
mix do deps.get, compile
A basic integration test is included, which can be run with mix test.
Example application
The application represents the core engine for a game of rock, paper, scissors. If you've never played this game, please refer to the relevant Wikipedia page.
Features
- Create game sessions
- Players can join a session
- After playing, the winner takes 1 point
- Score is recorded in-memory for ephemeral glory
- Playable via an IEx console
Structure
- Each game session is represented by a process, implemented as a GenServer. See Rps.Game.Session.
- Games are managed via a DynamicSupervisor. See Rps.Game.Supervisor.
- Score is recorded in a ETS table. See Rps.Score.