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Project Architecture

The project file structure is organized into directories:

• controller handles incoming HTTP requests
• service contains the business logic
• repository implements CRUD operations for data persistence
• entity creates objects representing persisted data
• exception defines specific Java exceptions that are thrown by the service layer and caught by the controller

The MVC architecture maps onto the directories as follows:

• Model => repository, entity
• View => controller
• Controller => controller, service

Note: Since there are only JSON HTTP responses, the view is within the controller classes.