December 2019
Intermediate to advanced
200 pages
5h 4m
English
Content preview from Real-World Software Development
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Chapter 5. The Business Rules Engine
The Challenge
Your business is now doing really well. In fact, you’ve now scaled to an organization with thousands of employees. This mean you’ve hired many people for different business functions: marketing, sales, operations, admin, accounting, and so on. You realize that all the business functions have requirements for creating rules that trigger actions depending on some conditions; for example, “notify sales team if prospect’s job title is ‘CEO’.” You could be asking your tech team to implement each new requirement with bespoke software, but your developers are quite busy working on other products. In order to encourage collaboration between the business team and the tech team, you’ve decided that you will develop a Business Rules Engine that will enable developers and the business team to write code together. This will allow you to increase productivity and reduce the time it takes to implement new rules because your business team will be able to contribute directly.
The Goal
In this chapter you’ll first learn about how to approach a new design problem using test-driven development. You will get an overview about a technique called mocking, which will help specify unit tests. You will then learn about a couple of modern features in Java: local variable type inference and switch expressions. Finally, you’ll learn how to develop a friendly API using the Builder pattern and the Interface Segregation Principle.
Note
If at any point you ...
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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.