June 2018
Intermediate to advanced
310 pages
6h 32m
English
Content preview from Hands-On Design Patterns with Kotlin
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Chain of responsibility
I'm a horrible software architect, and I don't like to speak with people. Hence, while sitting in The Ivory Tower (that's the name of the cafe I often visit), I wrote a small web application. If a developer has a question, he shouldn't approach me directly, oh no. He'll need to send me a proper request through this system, and I shall answer him only if I deem this request worthy.
A filter chain is a very common concept in web servers. Usually, when a request reaches to you, it's expected that:
- Its parameters are already validated
- The user is already authenticated, if possible
- User roles and permissions are known, and the user is authorized to perform an action
So, the code I initially wrote looked something like ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.