Clean Apex Code: Software Design for Salesforce Developers

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2025

P. GonzalezClean Apex Codehttps://doi.org/10.1007/979-8-8688-1411-2_10

10. Modularity, Coupling, and Cohesion

Pablo Gonzalez¹  

(1)

Dublin, Ireland

 

One of the most important elements of software design is determining who needs to know what, and when.

—John Ousterhout

In the preceding chapter, we spoke about several software design principles. The one which I didn’t cover is modularity because as you are about to see, it’s a complex and nuanced topic that deserves a whole chapter.

10.1 Modularity

Note

Throughout this chapter, I will use the word “module” to refer to a unit of logic that satisfies a particular requirement. This can be a method, a class, a library, ...