Welcome back, Sujit Kumar Mishra

End-to-End Flow

- Can you explain the complete end-to-end request flow in a Spring Boot application?

- How does a request travel from the client to the database and back, including all intermediate components?

End-to-End Request Flow in Spring Boot

1: Client Sends Request

The client (browser, mobile app, etc.) sends an HTTP request to the server.

2: Controller Receives Request

Spring Boot’s controller catches the request and decides what to do.

3: Service Layer Processes Logic

The controller calls the service layer, which handles business logic (calculations, rules, etc.).

4: Repository Accesses Database

The service calls the repository layer, which interacts with the database to fetch or save data.

5: Database Returns Data

The database sends the requested data back to the repository.

6: Service Layer Handles Data

The repository passes the data to the service layer, which may process it further.

7: Controller Sends Response

The service returns the final data to the controller, which sends an HTTP response back to the client.

In summary:

Client → Controller → Service → Repository → Database → Repository → Service → Controller → Client