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 and/or the Vaadin framework. When a CRUD operation is made, the application sends a message to the Log Server via RabbitMQ, to log the operation. Note: the Server Log is located in my repository "Log Server"

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

./gradlew build

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

In order to receive the sended log messages when a CRUD operation is made, you need:

1. download RabbitMQ, install and start the service
2. download the Server Log (receives the log messages) and start the service Note: the Server Log is located in my repository "Log Server"
3. Start this application.

The project consists of two Http Serves:

1. http://localhost:8080/books - Restful web Service
2. http://localhost:8090 Log Server RabbitMQ sends the messages between these two servers.

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.

To check the logs sended to the Log server connect to http://localhost:8090 using a web browser.

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