The Use Case Pattern is a way of organizing the business logic of an application into a set of use cases. Each use case represents a specific action that a user can perform within the system. For example, in an e-commerce application, a use case might be “Place an Order” or “View Order History”.
The Use Case Pattern consists of three main components:
Entities: These are the objects that represent the data in the system. They are usually implemented as classes or structs in the code.
Use Cases: These are the actions that a user can perform within the system. They are implemented as methods or functions that take input from the user and manipulate the entities.
Controllers: These are the objects that coordinate the use cases and entities. They are responsible for handling the input from the user, invoking the appropriate use case, and updating the entities.
By organizing the business logic of an application into a set of use cases, developers can create software systems that are easy to understand, test, and maintain. The Use Case Pattern helps to decouple the business logic from the user interface and the data storage, which makes it easier to change any of these components without affecting the others.
In conclusion, the Use Case Pattern is a powerful design pattern that can help developers to create software systems that are easy to understand, test, and maintain. By organizing the business logic of an application into a set of use cases, developers can create software systems that are flexible and adaptable to changing requirements.
Happy architecture.