Service Layer

Definitions

1. An architectural layer that sits between controllers (or API handlers) and the data access layer, encapsulating business logic, orchestrating transactions, and enforcing domain rules — keeping controllers thin and models persistence-focused.

   In plain English: A middle layer in an application that holds the business rules, keeping them separate from the web request handling and database code.

   Example: "Move the discount calculation out of the controller and into the service layer so both the API and the admin panel use the same logic."

Related Terms

• Loose Coupling
• Model-View-Controller
• Model-View-Presenter
• Model-View-ViewModel
• MVC
• MVP Pattern
• Onion Architecture
• Plugin Architecture
• Presenter
• Specification Pattern
• Tight Coupling