Quarkus

Using Kubernetes ConfigMaps to define your Quarkus application’s properties

Using Kubernetes ConfigMaps to define your Quarkus application’s properties

sblanc
By Sébastien Blanc

So, you wrote your Quarkus application, and now you want to deploy it to a Kubernetes cluster. Good news: Deploying a Quarkus application to a Kubernetes cluster is easy. Before you do this, though, you need to straighten out your application’s properties. After all, your app probably has to connect with a database, call other services, and so on. These settings are already defined in your application.properties file, but the values match the ones for your local environment and won’t work once deployed onto your cluster.

So, how do you easily solve this problem? Let’s walk through an example.

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See the magic behind Quarkus, the cloud-native Java framework

See the magic behind Quarkus, the cloud-native Java framework

editorial-teamyanaga
By Editorial Team and Edson Yanaga

Our first DevNation Live regional event was held in Bengaluru, India in July. This free technology event focused on open source innovations, with sessions presented by elite Red Hat technologists.

Quarkus is revolutionizing the way that we develop Java applications for the cloud-native era, and this tutorial, presented by Edson Yanaga, explains why. Yanaga looks at how Quarkus works and the techniques it uses to achieve its dramatic startup speed improvements. He also covers the Quarkus extension API, so you can see how to write your own extensions.

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How Quarkus brings imperative and reactive programming together

How Quarkus brings imperative and reactive programming together

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By Syed M Shaaf and Clement Escoffier

The supersonic subatomic Java singularity has expanded!

42 releases, 8 months of community participation, and 177 amazing contributors led up to the release of Quarkus 1.0.  This release is a significant milestone with a lot of cool features behind it. You can read more in the release announcement.

Building on that awesome news, we want to delve into how Quarkus unifies both imperative and reactive programming models and its reactive core. We’ll start with a brief history and then take a deep dive into what makes up this dual-faceted reactive core and how Java developers can take advantage of it.

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Quarkus: Modernize “helloworld” JBoss EAP quickstart, Part 2

Quarkus: Modernize “helloworld” JBoss EAP quickstart, Part 2

mrizzi
By Marco Rizzi

In part one of this series, we took a detailed look at Red Hat JBoss Enterprise Application Platform (JBoss EAP) quickstarts helloworld quickstart as a starting point for understanding how to modernize a Java application using technologies (CDI and Servlet 3) supported in Quarkus. In this part, we’ll continue our discussion of modernization with a look at memory consumption.

Measuring performances is a fundamental topic when dealing with a modernization process, and memory consumption reporting is part of performance analysis. It’s worth starting with these tools from the very beginning so that they can be used to evaluate the improvements achieved during the modernization process.

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Quarkus: Modernize “helloworld” JBoss EAP quickstart, Part 1

Quarkus: Modernize “helloworld” JBoss EAP quickstart, Part 1

mrizzi
By Marco Rizzi

Quarkus is, in its own words, “Supersonic subatomic Java” and a “Kubernetes native Java stack tailored for GraalVM & OpenJDK HotSpot, crafted from the best of breed Java libraries and standards.” For the purpose of illustrating how to modernize an existing Java application to Quarkus, I will use the Red Hat JBoss Enterprise Application Platform (JBoss EAP) quickstarts helloworld quickstart as sample of a Java application builds using technologies (CDI and Servlet 3) supported in Quarkus.

It’s important to note that both Quarkus and JBoss EAP rely on providing developers with tools based—as much as possible—on standards. If your application is not already running on JBoss EAP, there’s no problem. You can migrate it from your current application server to JBoss EAP using the Red Hat Application Migration Toolkit. After that, the final and working modernized version of the code is available in the https://github.com/mrizzi/jboss-eap-quickstarts/tree/quarkus repository inside the helloworld module.

This article is based on the guides Quarkus provides, mainly Creating Your First Application and Building a Native Executable.

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Bring joy to development with Quarkus, the cloud-native Java framework

Bring joy to development with Quarkus, the cloud-native Java framework

editorial-teamyanaga
By Editorial Team and Edson Yanaga

Our first DevNation Live regional event was held in Bengaluru, India in July. This free technology event focused on open source innovations, with sessions presented by elite Red Hat technologists.

Quarkus is revolutionizing the way that we develop Java applications for the cloud-native era, and in this presentation, Edson Yanaga explains why it also sparks joy.

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Autowire MicroProfile into Spring with Quarkus

Autowire MicroProfile into Spring with Quarkus

jclingan
By John Clingan

Eclipse MicroProfile and Spring Boot are often thought of as separate and distinct APIs when developing Java microservices. Developers default to their mental muscle memory by leveraging the APIs that they use on a daily basis. Learning new frameworks and runtimes can be a significant time investment. This article aims to ease the introduction to some popular MicroProfile APIs for Spring developers by enabling them to utilize the Spring APIs they already know while benefiting from significant new capabilities offered by Quarkus.

More specifically, this article covers the scope and details of the Spring APIs supported by Quarkus so Spring developers have a grasp of the foundation they can build on with MicroProfile APIs. The article then covers MicroProfile APIs that Spring developers will find helpful in the development of microservices. Only a subset of MicroProfile is covered.

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How the new Quarkus extension for Visual Studio Code improves the development experience

How the new Quarkus extension for Visual Studio Code improves the development experience

dkwon
By David Kwon

Earlier this year, we were introduced to Quarkus, the next-generation, container-first framework for Java applications. As expected, such new frameworks and technologies make way for new developer tools focused on making the development experience even better.

The recent Quarkus Tools for Visual Studio Code release aims to do just that, by bringing features specific to Quarkus project development within VS Code. The new VS Code extension is dependent on a couple of Java extensions for VS Code, so it is recommended that you have the Java Extension Pack installed. This article outlines what the Quarkus Tools for Visual Studio Code has to offer: convenient features for an already convenient Java framework.

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Event-driven business automation powered by cloud-native Java

Event-driven business automation powered by cloud-native Java

mswiderski
By Maciej Swiderski

Kogito is a new Java toolkit, based on Drools and jBPM, that’s made to bring rules and processes to the Quarkus world. The DevNation Live tech talk at the end of this article explains how Kogito can be used to build cloud-ready, event-driven business applications, and it includes a demo of implementing the business logic of a complex domain.

Kogito itself is defined as a cloud-native business automation toolkit that helps you to build intelligent applications. It’s way more than just a business process or a single business rule—it’s a bunch of business rules, and it’s based on battle-tested capabilities.

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