Our server implementation lacks a few things. How to stop it gracefully and how to upgrade its code?
Our current implementation (right below the
## Callbacks (Server API) comment) has three of the six callbacks that form the GenServer base skeleton. The ones missing are
We will be implementing all of these functions in this recipe.
The GenServer provides default implementations for all
:gen_server callbacks. This is the reason we can get away without having to define all of them explicitly, like we did in Erlang.
To start, we need to load the
connection_tracker.ex module in a code editor.
We will follow these steps to implement the functions and make our ...