Working with the CQRS Pattern

We now know that microservices require some foresight during the planning phase and that we must employ the best patterns and technology to support our decisions. In this chapter, we will explore another pattern that has gained much acclaim for helping us write clean and maintainable code: the Command Query Responsibility Segregation (CQRS) pattern, which is an extension of the CQS pattern.

The CQRS pattern is a fundamental architectural principle that plays a pivotal role in the design and implementation of modern microservices. At its core, CQRS divides the responsibilities of reading and writing data into two distinct paths, enabling developers to optimize each independently. This segregation allows for better scalability, maintainability, and performance in applications where complex business logic and high-throughput requirements are paramount.

In a traditional monolithic or layered architecture, the same data model is often used for retrieving...