Section 4: Designing at Application Scale

In this section, we enter the realm of application design. Instead of focusing on a smaller part of an application, we look at how we want to design the application itself. We start by looking into layering, which exposes the bases of application design, where we focus on the three most common layers used in layered applications before moving toward the evolution of layering. We explore two ways of modeling the domain model. We then explore a way to encapsulate and lower the burden of layering and model copy before moving on to newer architectural styles, such as vertical slice and microservices.

Each of these chapters could make a book by themselves, so we explore them at a higher level, helping you make more informed decisions when the time to choose an architectural style will arrive. This section is a starting point to further reading, while still filled with useful content, patterns, tips, and technologies to use straight away in your...