Develop Microservices Using Spring Boot

In this project, we'll build a microservices architecture application using Spring Boot and Thymeleaf to create an inventory and shopping cart system with OAuth authentication. Microservices allow independent development and deployment of loosely coupled services, making applications more scalable and maintainable. We'll implement a complete full-stack Java application with Spring Boot handling the backend REST APIs and Thymeleaf templates rendering the server-side frontend in a multi-page application architecture.

We'll start by creating JPA entities for items, users, and cart items, then build Spring Data repositories for database operations using the repository pattern. Next, we'll develop an inventory service with business logic for adding items to inventory, managing the shopping cart, and removing items. We'll implement Spring controllers to handle navigation and HTTP requests, mapping POST and DELETE operations for cart functionality. Then we'll configure OAuth 2.0 authentication with secure credentials and integrate OAuth login flows into the controller layer for user authorization.

Finally, we'll create Thymeleaf HTML templates for the frontend interface, build the application into an executable JAR file, and launch the complete microservice. By the end, you'll have a working e-commerce system demonstrating Spring Boot microservices, OAuth security, JPA entity mapping, Spring Data repositories, Thymeleaf server-side rendering, and RESTful API design applicable to any enterprise Java application.