BOOKS REACTIVE REPOSITORY WITH JPA-H2, REST AND GUI

Spring Boot application that implements a book's repository using CRUD (Create, Read, Update, Delete) operations to create and recover objects (books) stored in a H2 data base using Spring Data JPA. The CRUD operations are made via RESTful. The GUI is made using the framework Vaadin.

Modules:

• Spring Boot
• Spring Data JPA
• Spring Boot - HATEOAS for RESTful Services
• Spring Boot Web
• Vaadin - Java web framework - https://vaadin.com
• H2 In-Memory Database
• RxJava2

Build the jar:

./gradlew build

Run the jar:

java -jar build/libs/rxjava-jpa-h2-rest-gui-0.0.1-SNAPSHOT.jar

Test the application:

You can work with CRUD operations in two ways:

1. Connect to the server via http://localhost:8080/books using for example a Restful API tester, like Postman, and check the CRUD operations.

Note: the json input for PUT or POST should be like:

{ "author" : "book´s author", "title" : "book´s title" }

2. Connect to the server http://localhost:8080 and use the GUI to check the CRUD operations.

You can see that the application is reactive, opening more than one connection to the server http://localhost:8080 and, check that any time you made a CRUD operation with one client (web browser or postman) the others clients are automatically updated.