Java with Spring DataJPA-based test project for my GIT Repo

DB: H2 SQL CRUD based

I'd be happy to describe the miniature project you've created to showcase the architecture layers for a Java backend implementation using Spring Data JPA for CRUD operations and H2 SQL as the database, with REST API endpoints tested using Postman.

Project Overview:

This miniature project is a demonstration of a microservice application built using Java with Spring Boot, showcasing the following architecture layers:

1. Presentation Layer:

   • This layer handles HTTP requests and responses.
   • It includes REST API endpoints implemented using Spring MVC.
   • Endpoints are responsible for processing incoming requests, executing business logic, and returning appropriate responses.

2. Service Layer:

   • The service layer encapsulates business logic.
   • It contains service classes that orchestrate interactions between controllers and repositories.
   • Service classes manage transactions, validations, and other business operations.

3. Persistence Layer:

   • This layer deals with data storage and retrieval.
   • Spring Data JPA is used for seamless interaction with the database.
   • Entities represent domain objects and are mapped to database tables.
   • Repositories provide CRUD operations for interacting with entities.

4. Database:

   • H2 SQL database is utilized for data storage.
   • H2 is an in-memory database, convenient for development and testing purposes.
   • It provides SQL support compatible with other relational databases.

5. Testing:

   • Postman is used to test the REST API endpoints.
   • Tests cover CRUD operations (Create, Read, Update, Delete) to ensure the functionality of the API.
   • Integration tests may also be implemented to validate interactions between layers.

Technologies Used:

• Java: The primary programming language for backend development.
• Spring Boot: Provides a framework for building microservices with minimal configuration.
• Spring Data JPA: Simplifies data access using the JPA specification.
• H2 SQL Database: Lightweight and fast in-memory database.
• Postman: A popular API client for testing and debugging HTTP APIs.