August 2018
Intermediate to advanced
372 pages
9h 29m
English
Content preview from Software Architecture with Spring 5.0
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The Liskov substitution principle
The Liskov substitution principle (LSP) has a fancy definition:
Module A can be replaced by module B as long as B is a subtype of A.
Well-defined contracts heavily support this definition and help us reduce the coupling between modules. The following questions can help you figure out how well this principle is achieved:
- Are the modules interacting using abstractions or concrete implementations?
Here, the answer should be that the modules should not be interacting with either option. There is no reason to establish interactions among modules by using their concrete implementations instead of their interfaces.
- Should I be casting objects in order to use them?
I hope not. If so, it's because the interface ...
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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.