Osteria

Demo application for Elixir.LDN's talk "GenStage in the Kitchen" slides here

Setup

mix deps.get iex -S mix

Then visit http://localhost:4001

Frontend

The frontend application is built with Elm, so it requires it to be installed.

Compiled js and css is shipped with the codebase, so you don't need to compile by hand after cloning. If you wish to make any changes you can:

• cd frontend
• make install
• make to compile
• make watch to start a watcher that recompiles on save

Some directions when reading code

• Start from lib/osteria.ex: here all processes are setup in single supervision tree.
• The Osteria.Status module is used to collect information about each component in the system, so that we can pipe that information to the frontend.
• You can then move to lib/osteria/table.ex and see how each table handles people sitting down and deciding dishes. Note that to keep track of tables we use a Osteria.TableRegistry Elixir 1.4 process Registry.
• The Waiter module is modeled after the EventManager example shown here: http://elixir-lang.org/blog/2016/07/14/announcing-genstage/.
• The Osteria.Chef module partitions orders using a Osteria.Menu module to figure out a dish type (grill, oven, etc.)
• If you open the Osteria.Log module you can enable logging (roughly commented out towards the end). That way you can see events happening in real time in the console.