Key Architectural Patterns in Microservices – DDD, CQRS, and Event Sourcing

This chapter is all about appreciation of the backbone of microservices – the central patterns that make our software designs strong, scalable, and effective.

So first off, we’ll want to delve into the world of domain-driven design. It’s an approach to software that fits business concerns to any given software project. It’s akin to ensuring our software speaks the same lingo as the business challenges it’s working to answer.

Coming up is Command Query Responsibility Segregation. It’s a nice way to divide how we manipulate data in two – one for updating and another for retrieving. It divides our software duties in a cleaner, more efficient way.

Next, there is Event Sourcing. We record each change as a series of events here. It is like an itemized account of everything that has happened – one which can be very powerful for looking back at...