Quarkus Archives - Red Hat Developer

Generate automated Grafana metrics dashboards for MicroProfile apps

By James Falkner July 10, 2020July 13, 2020

Grafana is an awesome visualization tool for seeing real-time metrics from your applications, and you can combine it with MicroProfile and similar tools to create one dashboard for multiple projects. Different projects use different names for metrics, however, so it is often necessary (and tedious) to handcraft the metrics for each project. Moreover, each project can expose its own custom metrics, and each MicroProfile vendor can also produce custom metrics, so there are many manual steps involved if you want to see all of your metrics in one place.

What if you could simply examine a running app and generate a dashboard with all of its exposed metrics? That is exactly what you can do with the MicroProfile Metrics Generator, a new open source tool that I created to dynamically generate Grafana dashboards for any MicroProfile project by capturing and monitoring all of your project metrics. Once you’ve created a dashboard, you can use it with Grafana, customize it to suit specific needs, and save it as a JSON file. You can also periodically regenerate your dashboards to bring in new metrics that you’ve exposed in your application.

In this article, you will learn how to do just that: Use the MicroProfile Metrics Generator to create a unified dashboard for all of your project’s metrics.

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Automate workshop setup with Ansible playbooks and CodeReady Workspaces

By James Falkner July 3, 2020July 7, 2020

At Red Hat, we do many in-person and virtual workshops for customers, partners, and other open source developers. In most cases, the workshops are of the “bring your own device” variety, so we face a range of hardware and software setups and corporate endpoint-protection schemes, as well as different levels of system knowledge.

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Debugging GraalVM-native images using gdb

By Andrew Dinn June 25, 2020June 25, 2020

The GraalVM project includes, amongst other capabilities, a component called GraalVM Native Image. GraalVM Native Image supports the delivery of Java applications as shrink-wrapped, self-contained, standalone executables, commonly referred to as Java-native images. Native images often have a smaller footprint and faster startup time compared to running the same application in the traditional way on the JVM. This is often a win for short-running applications or small, container-based services. The trade-off is usually lower peak performance for long-running programs, and higher garbage collection overheads and latencies for programs with large amounts of resident data.

We are especially interested in GraalVM-native images as an alternative back-end delivery option for applications based on Quarkus. The Java team has worked hard to ensure that Quarkus is well integrated with GraalVM Native Images. In the process, they have found that one important usability issue is the ability to debug the delivered native image.

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Develop and test a Quarkus client on Red Hat CodeReady Containers with Red Hat Data Grid 8.0

By Durgesh Anaokar June 19, 2020June 25, 2020

This article is about my experience installing Red Hat Data Grid (RHDG) on Red Hat CodeReady Containers (CRC) so that I could set up a local environment to develop and test a Quarkus Infinispan client. I started by installing CodeReady Containers and then installed Red Hat Data Grid. I am also on a learning path for Quarkus, so my last step was to integrate the Quarkus Infinispan client into my new development environment.

Initially, I tried connecting the Quarkus client to my locally running instance of Data Grid. Later, I decided I wanted to create an environment where I could test and debug Data Grid on Red Hat OpenShift 4. I tried installing Data Grid on OpenShift 4 in a shared environment, but maintaining that environment was challenging. Through trial-and-error, I found that it was better to install Red Hat Data Grid on CodeReady Containers and use that for my local development and testing environment.

In this quick tutorial, I guide you through setting up a local environment to develop and test a Quarkus client—in this case, Quarkus Infinispan. The process consists of three steps:

Install and run CodeReady Containers.
Install Data Grid on CodeReady Containers.
Integrate the Quarkus Infinispan client into the new development environment.

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Tracking COVID-19 using Quarkus, AMQ Streams, and Camel K on OpenShift

By Grant McCarthy June 15, 2020June 25, 2020

In just a matter of weeks, the world that we knew changed forever. The COVID-19 pandemic came swiftly and caused massive disruption to our healthcare systems and local businesses, throwing the world’s economies into chaos. The coronavirus quickly became a crisis that affected everyone. As researchers and scientists rushed to make sense of it, and find ways to eliminate or slow the rate of infection, countries started gathering statistics such as the number of confirmed cases, reported deaths, and so on. Johns Hopkins University researchers have since aggregated the statistics from many countries and made them available.

In this article, we demonstrate how to build a website that shows a series of COVID-19 graphs. These graphs reflect the accumulated number of cases and deaths over a given time period for each country. We use the Red Hat build of Quarkus, Apache Camel K, and Red Hat AMQ Streams to get the Johns Hopkins University data and populate a MongoDB database with it. The deployment is built on the Red Hat OpenShift Container Platform (OCP).

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AI vs COVID-19: How Java helps nurses and doctors in this fight

By Geoffrey De Smet and Edson Yanaga June 9, 2020June 25, 2020

DevNation Tech Talks are hosted by the Red Hat technologists who create our products. These sessions include real solutions plus code and sample projects to help you get started. In this talk, you’ll learn how OptaPlanner has helped keep medical staff and patients safer with advanced planning algorithms, from Geoffrey De Smet and Edson Yanaga.

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Mandrel: A community distribution of GraalVM for the Red Hat build of Quarkus

By Mark Little June 5, 2020June 25, 2020

The Java community has demonstrated time and time again its ability to evolve, improve, and adapt to meet the needs of its developers and users. Even after 25 years of language and framework choices, Java has consistently ranked in the top languages in use today due to its strong track record and capabilities in enterprise use cases. Red Hat has long been a strong leader in Java and open source software development and remains committed to being at the forefront of Java as it continues to evolve.

Today, Red Hat and the GraalVM community jointly established a new downstream distribution of GraalVM, called Mandrel. This distribution will power the Red Hat build of Quarkus, a recently announced addition to Red Hat Runtimes. This article explains what Mandrel is and why it is necessary.

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The road to Quarkus GA: Completing the first supported Kubernetes-native Java stack

By Mark Little June 4, 2020June 25, 2020

I’ve had many proud moments in my role here at Red Hat over the years. Examples include when we released the first version of WildFly, when we acquired the Camel team, when we worked with other vendors to create Eclipse MicroProfile, the great work the Strimzi team did to get into the Cloud Native Computing Foundation, our entire Red Hat Managed Integration effort, Kogito, and the list goes on. I feel like I add to this list of examples on an almost weekly basis.

Well, I can now update this list with the first product release of Quarkus, formally called the Red Hat build of Quarkus. (You can also find more support options on the Quarkus project site.) It should come as no surprise that Quarkus is on this list. I suppose what might surprise some people is that Quarkus is only just a product now. Given all of the activities since we officially launched the Quarkus project in 2019, you could be forgiven for thinking it was already a product.

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Quarkus, a Kubernetes-native Java runtime, now fully supported by Red Hat

By Jeff Beck May 28, 2020June 26, 2020

Java was introduced 25 years ago, and to this day, remains one of the most popular programming languages among developers. However, Java has developed a reputation for not being a good fit for cloud-native applications. Developers look for (and often choose) alternative frameworks such as Go and Node.js to support their cloud-native development requirements.

Why learn another language when you can use your existing skills? Quarkus allows Java developers to leverage their expertise to develop cloud-native, event-driven, reactive, and serverless applications. Quarkus provides a cohesive Java platform that feels familiar but new at the same time. Not only does it leverage existing Java standards, but it also provides a number of features that optimize developer joy, including live coding, unified configuration, IDE plugins, and more.

Recently, Red Hat announced support for Quarkus. With Quarkus, Red Hat advances Java on Kubernetes and bridges the gap between traditional Java applications and cloud-native environments.

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