State Transitions
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Articles about State Transitions
Implementing State Design Pattern in ASP.NET Core Web API with 3-Tier Architecture
In this ASP.NET Core Web API project utilizing a 3-Tier Architecture with the State Design Pattern, we've created a News management system that encapsulates the state of news items, allowing for a clear and structured way to handle state transitions. The architecture consists of three distinct layers: Presentation, Business Logic, and Data Access. The Business Logic layer is where the State Design Pattern is applied, with different states such as Draft, Published, and Archived, each represented by concrete state classes. The NewsService class is responsible for managing these states and their transitions. Controllers in the Presentation layer handle HTTP requests and delegate the state-related operations to the NewsService, enabling CRUD functionality for news items. By setting the appropriate state and invoking state-specific methods, such as Publish and Archive, we control the state transitions. While this example focuses on the pattern's core implementation, in a real-world scenario, you would integrate a data access layer to persist and retrieve news items from a database, making it a robust and maintainable system.
