🛠️ ProductUserRESTApi

A RESTful Spring Boot API to manage Users and their associated Products, with full CRUD functionality and secure role-based access. Built with Spring Boot 3.x, Spring Security, and Spring Data JPA, this application demonstrates clean architecture, layered separation of concerns, and practical in-memory authentication for role management.

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📌 Features

• 🔹 CRUD operations on User and Product entities
• 🔹 One-to-Many relationship: a User can own multiple Products
• 🔹 In-memory authentication using Spring Security
• 🔹 Role-based access to secure endpoints
• 🔹 Differentiated access for ADMIN and USER roles

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🔐 In-Memory User Roles

Username	Password	Role	Can Access
admin	admin123	ADMIN	/users/**, /products/**
user	user123	USER	/products/** only

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🔗 API Access Permissions

Endpoint	Method	Role(s) Allowed	Description
/products	GET	ADMIN, USER	List all products
/products	POST	ADMIN, USER	Create a product
/products/{id}	PUT	ADMIN	Update product by ID
/products/{id}	DELETE	ADMIN	Delete product by ID
/users	GET	ADMIN	List all users
/users	POST	ADMIN	Create a new user

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🧰 Technologies Used

• Java 17
• Spring Boot 3
• Spring Data JPA
• Spring Security
• MySQL / H2 (configurable)
• Maven

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📄 License

This project is licensed under the MIT License.