Introduction

APIs build programmatic interactions between applications, people, and businesses. They are designed around sharing data and executing pre-defined processes. Spring Boot and Spring Data JPA reduce time for development; developers implement POJOs and JPA access layers; Spring hanldes the rest.

An API allows you to request and receive data from the system. A POJO is the foundation for making an Entity that is turned into a Database. The Java Persistent API (JPA) allows the database to be queried and updated.

The subject of this article is Jokes, likes (haha) and dislike (boohoo). User clicks haha or boohoo and updates counters.

Runtime

Back-end Java Spring Files

  • Jokes.java - contains POJO which defines Model
  • JokesApiControler.java - contains APIs and Control, which respond to View actions
  • JokesJpaRepository.java - contains CRUD and data acess queries

Visual Overview

  
Spring API and ORM