What happened
A common trend in software projects is the automatic creation of separate layers for each entity, like UserService and UserRepository. This practice is called the layer-per-entity approach. While layering can be beneficial, there’s a concern that these layers often do not serve their intended purpose effectively.
Why this matters
The primary role of a Service is to encapsulate application behavior, including interactions with external systems like payment gateways or email services. Repositories, on the other hand, should manage complex data access scenarios. However, many developers end up implementing Services that merely delegate tasks to Repositories, which often function as simple wrappers around Object-Relational Mapping (ORM) tools. This can lead to confusion rather than clarity, as the additional layers do not add meaningful abstraction.
Context
Historically, the separation of concerns in software architecture has advocated for clear distinctions between service logic and data access. This separation is meant to promote maintainability and scalability. However, as projects evolve, many teams default to creating layers for every entity, sometimes without considering whether these layers genuinely enhance the design or just add unnecessary complexity.
What this means
The default approach of creating generic Services and Repositories may not yield the intended benefits. Instead of organizing code around generic layers, focusing on specific use cases can lead to a more intuitive structure. By designing code around the system's intent, developers can create a clearer and more efficient architecture that reflects actual functionality rather than mere structural templates. This shift could help reduce the noise in codebases, making them easier to understand and maintain.
