WeatherExercise

A starting point for learning about OTP in Elixir.

Exercise details found in Chapter 12 of Études for Elixir

Usage

In an iex -S mix session, verify that the HTTP requesting / parsing is working as expected:

iex(1)> Weather.init
{:ok, %{}}
iex(2)> Weather.fetch_and_parse("KAHN")
{:ok,
 [location: 'Athens, Athens Airport, GA',
  observation_time_rfc822: 'Wed, 19 Jul 2017 14:51:00 -0400',
  weather: 'Partly Cloudy', temperature_string: '93.0 F (33.9 C)']}

Directions

1. Read and understand the intended API (using GenServer) for Étude 12-1 (see link above - there are 2 separate example REPL sessions to ensure are working). Complete the rest of this one, including setting up a supervisor to restart the server upon crashes.

• You'll want to make sure you really understand how handle_call and handle_cast manage state in order to get all the pieces put together.

2. Provide the wrapper API requested by Étude 12-2.

Bonus

• Pull the server and client apart, as directed by Étude 12-3.