Chain of Responsibility Design Pattern
Learn how to apply the Chain of Responsibility design pattern in Kotlin to structure request handling into modular steps, using interfaces or functional programming techniques. This lesson helps you manage complex logic through composable handlers, improving code clarity and enabling scalable solution architecture.
We'll cover the following...
Let’s imagine that there’s a horrible software architect who doesn’t particularly appreciate speaking with people. Hence, while sitting in The Ivory Tower (that’s the name of the cafe they often visit), they wrote a small web application.
If a developer has a question, they shouldn’t approach the software architect directly, oh no! They’ll need to send them a proper request through this system and they shall only answer it if they deem the request worthy.
A filter chain is a ubiquitous concept in web servers. Usually, when a request reaches us, it’s expected that the following is true:
- Its parameters have already been validated.
- The user has already been authenticated, if possible.
- User