Service Layer Pattern
The Service Layer Pattern is a software design pattern that defines an application's boundary with a layer of services that establishes a set of available operations and coordinates the application's response in each operation. It encapsulates business logic, separating it from presentation and data access layers, and acts as an intermediary between the user interface and the domain model or data sources. This pattern promotes a clean architecture by centralizing business rules and transaction management.
Developers should use the Service Layer Pattern when building complex applications, especially in enterprise or web contexts, to manage business logic cohesively and avoid scattering it across controllers or data access objects. It is particularly useful for applications requiring transaction management, security enforcement, or integration with multiple data sources, as it provides a single point of control. This pattern enhances maintainability, testability, and scalability by decoupling core operations from other layers.