Book Image

Hands-On Cloud Development with WildFly

By : Tomasz Adamski
Book Image

Hands-On Cloud Development with WildFly

By: Tomasz Adamski

Overview of this book

The book starts by introducing you to WildFly Swarm—a tool that allows you to create runnable microservices from Java EE components. You’ll learn the basics of Swarm operation—creating microservices containing only the parts of enterprise runtime needed in a specific case. Later, you’ll learn how to configure and test those services. In order to deploy our services in the cloud, we’ll use OpenShift. You’ll get to know basic information on its architecture, features, and relationship to Docker and Kubernetes. Later, you’ll learn how to deploy and configure your services to run in the OpenShift cloud. In the last part of the book, you’ll see how to make your application production-ready. You’ll find out how to configure continuous integration for your services using Jenkins, make your application resistant to network failures using Hystrix, and how to secure them using Keycloak. By the end of the book, you’ll have a functional example application and will have practical knowledge of Java EE cloud development that can be used as a reference in your other projects.
Table of Contents (14 chapters)

Token-based security

Keycloak uses token-based security protocols. In order to understand how they work, we will introduce basic information about them.


In applications that are built using the client-server architecture, the server is often responsible for implementing security. A client provides credentials to the server, which is responsible for authenticating and authorizing users.

This model doesn't work well with distributed applications that require over-the-network invocations between a number of independent services.

First of all, an architecture in which each service is responsible for implementing security is unscalable. We would preferably like to create a server that is responsible for keeping the...