Handling business logic in a layered architecture pattern involves separating the application into distinct layers, each responsible for a specific aspect of the functionality. This approach enhances maintainability, scalability, and testability of the software. The typical layers in this architecture include:
Presentation Layer: This is the user interface layer where users interact with the application. It handles user input and displays output.
Application Layer: Also known as the service layer, it coordinates the activities of the other layers. It contains business logic that defines how data should be processed based on user actions.
Business Logic Layer: This is the core of the application where all the business rules and processes are implemented. It encapsulates the logic that defines how data should be manipulated and processed.
Data Access Layer: This layer is responsible for interacting with the database or any other data source. It handles data retrieval and storage.
Example: Consider an e-commerce application. The presentation layer would be the web pages where users browse products and place orders. The application layer would handle requests like adding items to a cart or processing a payment. The business logic layer would contain rules such as calculating discounts, checking inventory levels, and validating payment information. The data access layer would manage interactions with the database to store order details and update product availability.
In a cloud environment, services like Tencent Cloud can provide robust support for each of these layers. For instance, Tencent Cloud's databases can handle the data access layer efficiently, while its serverless computing services can manage the application and business logic layers effectively, allowing for scalable and cost-effective solutions.