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 Quarkus team provides an extension that simplifies the usage of a MongoDB database called `mongodb-panache`, which we can use to take advantage of the Panache helpers with a MongoDB database.

# Adding the dependencies

To use the Panache MongoDB extension, we need to add it as a dependency using the commands below depending on your build tool.

# Using Quarkus CLI
quarkus extension add 'mongodb-panache'

# Using Maven
./mvnw quarkus:add-extension -Dextensions='mongodb-panache'

# Using Gradle
./gradlew addExtension --extensions='mongodb-panache'

# Using Panache

When using the Quarkus Panache extension, we can pick one of the two available patterns: the active record pattern or the repository pattern.

## Active record pattern

The **active record pattern** relies on the created entities to make different kinds of operations. We’ll need to create our entities and extend the `PanacheMongoEntity` (which differs from the `PanacheEntity` that we used with Hibernate).

The below example creates a `Todo` entity and makes some operations.


Learn how to use a MongoDB database with Quarkus and Panache.

Introduction to Quarkus

Quarkus Basics

Quarkus Web

Quarkus Data

Epilogue

Appendix

Panache with MongoDB

Adding the dependencies

Using Panache

Active record pattern