Concurrent Data Processing in Elixir

Starting with a Basic GenServer

We are going to continue working on the sender project from the previous chapter. If you decided to skip that part, please see ​Creating Our Playground​ and follow the steps to create a new Elixir project and make the required change in sender.ex. We are going to create a GenServer process from scratch and see how it compares to Task processes.

First, we’re going to create a new file in the lib directory. Let’s name it send_server.ex. In that file, we’ll define our SendServer module like so:

defmodule SendServer do
  use GenServer

end

The use macro for the GenServer module does two things for us. First, it automatically injects the line @behaviour GenServer in our SendServer module. If you’re not ...