Book Image

Hands-On Cloud-Native Applications with Java and Quarkus

By : Francesco Marchioni
Book Image

Hands-On Cloud-Native Applications with Java and Quarkus

By: Francesco Marchioni

Overview of this book

Quarkus is a new Kubernetes-native framework that allows Java developers to combine the power of containers, microservices, and cloud-native to build reliable applications. The book is a development guide that will teach you how to build Java-native applications using Quarkus and GraalVM. We start by learning about the basic concepts of a cloud-native application and its advantages over standard enterprise applications. Then we will quickly move on to application development, by installing the tooling required to build our first application on Quarkus. Next, we’ll learn how to create a container-native image of our application and execute it in a Platform-as-a-Service environment such as Minishift. Later, we will build a complete real-world application that will use REST and the Contexts and Dependency injection stack with a web frontend. We will also learn how to add database persistence to our application using PostgreSQL. We will learn how to work with various APIs available to?Quarkus?such as Camel, Eclipse MicroProfile, and Spring DI. Towards the end, we will learn advanced development techniques such as securing applications, application configuration, and working with non-blocking programming models using Vert.x. By the end of this book, you will be proficient with all the components of Quarkus and develop-blazing fast applications leveraging modern technology infrastructure.
Table of Contents (15 chapters)
Free Chapter
Section 1: Getting Started with Quarkus
Section 2: Building Applications with Quarkus
Section 3: Advanced Development Tactics

Securing Quarkus services with Keycloak

Keycloak ( is an open source access management solution that builds on top of the WildFly application server. You can adopt it in your architecture to leverage a wide variety of features, such as the following:

  • Client adapters
  • Single Sign-On (SSO)
  • Identity management and social login
  • Standard protocols (OpenID Connect or SAML)
  • A rich admin console
  • A user account management console

Thanks to these features and the ability to connect to existing identity standards, Keycloak has become a de facto standard for many large organizations. A supported version of it, known as Red Hat Single Sign-On (RH-SSO:, is also available for enterprise customers.

Once installed, Keycloak acts as the main security endpoint for the applications in your network. Therefore...