This is an implementation of the exercise described here
Assuming you have elixir/mix/postgres installed, you can create and seed the
database with the following command. This will provide you with 1_000_000 users
with their points value initialized to 0.
mix ecto.setup
NOTE: Due to limits with postgres, we batch up the inserts into groups of 25_000 users
You can reset the database and re-seed the database with:
mix ecto.reset
To start the server, make sure you have setup the database above, then run:
mix phx.server
With that running the server exposes a single endpoint at http://localhost:4000
The core set of functions for operating on a PointState are located in
RemoteExercise.PointState. The Boundary relies on this core but the separation
allows us to easily test each piece individually.
The PointManager is a GenServer that starts when the server starts. Every
minute this GenServer will spawn a task to update all 1_000_000 users point
values in the background. This task's result will be monitored and logged within
the GenServer. A task is used so that the API doesn't lockup while an update
occurs.
NOTE: On my machine the update occurs usually in 2-4 seconds. There is a configureable postgres query timeout that may need increased on your machine (default 15 seconds).
The test suite is located in the test folder and can be run with:
mix test