REST APIs using Spring Data REST

Download and install the MySQL community server on Windows, selecting the server component and setting a root password, noting visual C++ prerequisites, port 3306, and password encryption.

Install Postman, launch the app, and use its rest client to test your microservices' api. Learn to send get, post, put, patch requests with headers, json bodies, and basic authentication.

Explore how micro services are small, autonomous, and focused, contrasting them with monolithic apps like hospital management; learn how services expose APIs and communicate via network calls for independent deployment.

Explore how microservices extend SOA to address the monolithic application by splitting it into tiny services, while noting the end-to-end business functionality goal and implementation across vendors.

Learn how rest provides a uniform interface with http methods to create, read, update, and delete resources, and how collection versus item endpoints support multiple data formats via mime types.

Spring data rest simplifies creating restful APIs by exposing CRUD operations on a JPA entity through a repository, with HAL/HATEOAS support, eliminating boilerplate code.

Create an employee table, expose it as a restful web service with Spring Data REST in four steps, configure datasource, and perform CRUD via Postman.

Launch spring tool suite, create a spring boot project named employee-api with rest repositories, jpa, and mysql dependencies, configure pom.xml and application properties to finish a spring data rest project.

Configure the data source by adding spring.datasource properties in application.properties to define the JDBC URL, username, and password for the local MySQL database.

Launch a Spring Data REST application, run on embedded Tomcat at localhost:8080, and explore the employee REST resource with HAL/HATEOAS links and the optional profile meta information.

Complete the crud cycle by deleting the first employee via localhost:8080/employees/1, verify with a 404 on subsequent get, and confirm only the remaining record (id 2) exists.

Mark the abstract entity with id and creation timestamp using JPA annotations, and define event relationships to organizer, participants, and venue with fetch, cascade, and orphan removal settings.

Create repositories for all entities to expose them as RESTful resources and enable CRUD operations via Spring Data REST, including event, organizer, participant, and venue repositories.

Configure the data source to connect to the events database by updating application.properties and mapping the context to the Event Management API.

Test event management API with Postman by creating an organizer and then an event with embedded venue data, using Spring Data REST. Learn to customize link exposure in one step.

Explore paging and sorting in Spring Data REST by extending a paging and sorting repository, and navigate links like first, next, last, with page size, total elements, and total pages.

Enable paging for repository finders by returning a page and accepting a pageable parameter, so Spring Data REST adds paging links and page size control.