Gain insights into Quarkus, a modern Java framework. Learn about creating and configuring applications, REST endpoints, WebSockets, GraphQL, fault tolerance, and database connections for robust microservices.

quarkus.tar.gz

Quarkus run dev application

Quarkus test application

Quarkus run dev application + MongoDB

Quarkus run dev application + PostgreSQL

Quarkus is a modern Java framework that simplifies the creation of web applications. With the help of Quarkus, you can create modern applications and deploy them easily on the cloud.

You’ll begin the course with an introduction to Quarkus and the different features that make it a great Java framework. Next, you’ll explore the basics of Quarkus, such as creating and configuring an application, adding plugins, and testing your code. You’ll learn how to build modern web applications using Quarkus by creating and consuming REST endpoints and documenting them. You’ll also learn how to create a WebSocket server and a GraphQL endpoint and ensure fault tolerance for your application. Lastly,  you’ll add different kinds of database connections to your Quarkus application.

After completing this course, you’ll be equipped to create various applications and microservices using Quarkus, a must-have knowledge for any developer.

Developing Microservices with Quarkus

The **Jakarta Persistence API JPA** is a specification of Java. It is used to persist data in relational databases.

Hibernate is a popular implementation of the JPA specifications and it is the most popular Java #key# ORM: Object-relational mapping #key# used to fetch and update data in different databases.

# Adding the extensions

To use an SQL database, we need to add a couple of dependencies, the first being `quarkus-hibernate-orm`, the Hibernate extension for Quarkus. The second is the #key# JDBC: Java Database Connectivity (JDBC) is an API for the Java programming language, which defines how a client might access a database. #key# driver for the chosen database. Quarkus offers a list of extensions to handle different types of databases, which includes:

* `quarkus-jdbc-db2` used for IBM DB2.
* `quarkus-jdbc-derby` used for Apache Derby.
* `quarkus-jdbc-h2` used for H2.
* `quarkus-jdbc-mariadb` used for MariaDB.
* `quarkus-jdbc-mssql` used for Microsoft SQL Server.
* `quarkus-jdbc-mysql` used for MySQL.
* `quarkus-jdbc-oracle` used for Oracle Database.
* `quarkus-jdbc-postgresql` used for PostgreSQL.

> **Note:** In the rest of the course, we’ll use H2 as an SQL database.

After adding the dependencies, we should have the new lines in our `pom.xml` (or `build.gradle`) file.


Learn how to use a SQL database with Quarkus and Hibernate.

Introduction to Quarkus

Quarkus Basics

Quarkus Web

Quarkus Data

Epilogue

Appendix

Hibernate and JPA

Introduction

Adding the extensions