Summary
What we have essentially done in this chapter is build a program that accepts some command-line inputs, interacts with a file, and edits it depending on the command and data from that file. The data is simple: a title and a status. We could have done this all in the main function with multiple match statements and if, else if, and else blocks. However, this is not scalable. Instead, we built structs that inherited other structs, which then implemented traits.
We also defined the structure of our to-do service with workspaces. Here, we enabled our service to have multiple layers so we can swap approaches to storage easily. We also explored how to structure a basic service with a main and data access layer.
In chapter 5, we will build out our service on how to handle HTTP requests using a web framework. However, before we handle HTTP requests, we will explore async in detail, as we use async rust to handle incoming HTTP requests. Chapter 4 is an isolated chapter, meaning that you...
