This project is created to compare JPA vs Reactive to work with a relational database (PostgreSQL) on a standard task of managing a cart with products for renting.
The project uses Spring Boot, Spring Framework (Web MVC, WebFlux), Spring Data (JPA,R2DBC).
Let’s describe the main entities of the model.
Product is what is rented.
Item is an product instance that can be rented.
Contractor is the one who rents the product.
Order (a cart) is created by a client to added products for renting. Each product may have its own rental period. While the order is not completed the client can add or remove products. As soon as the order is completed, the client starts using these products. Once all products have been returned, the order will be closed.
Below is a diagram of the main entities.
The project uses Spring Framework and maven.
The project contains 3 modules.
Module jpa implements JPA approach and uses Spring Boot,Spring Web MVC,
Spring Data JPA.
Module react implements React approach and uses Spring Boot, Spring WebFlux,
Spring Data R2DBC.
Module common contains common classes.
The database is PostgreSQL 14.3. The script for creating the database and objects is
common\src\main\resources\create_postgres_db.sql