Visualizing Smog Sensor Data with the help of Vert.x, Prometheus, and Grafana

Air pollution is a major problem in many cities around the globe. Some people in Stuttgart, Germany have developed cheap smog sensors that people can install on their balconies and other convenient places and then report data to a central site. I have written about that on OpenSource.com. The data is sent to a central server, from where it is visualized on a map. At the time of writing the above article, there was no way of seeing how the value has changed over time. Meanwhile, there is a visualization of the last 24 hours available on the map.

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Technical Cheat Sheets for Developers

Over the past few months, we’ve been building and releasing a variety of technical cheat sheets and we’ve been getting many requests for more.  We are working on new cheat sheets every day, ok maybe not weekends, but almost every day. Here are the cheat sheets available today: Linux Commands Cheat SheetAdvanced Linux Commands Cheat SheetWildfly Swarm Cheat SheetContainers Cheat SheetMongoDB Cheat SheetKubernetes Cheat Sheet and the Eclipse Vert.x Cheat Sheet.

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Continuously Building a Book

I’m thrilled to announce the availability of a mini-book about Eclipse Vert.x. This book focuses on the development of reactive microservices in Java and covers reactive systems and reactive programming.

Writing a book, even for a mini-book is a tough task. While writing code and writing a book are very different experiences, you can apply the same process and good practice. I would like to list a couple of tips I’ve used to make the writing a bit easier.

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Eclipse Vert.x Core Cheat Sheet

Eclipse Vert.x is a toolkit used to build reactive and distributed systems on the Java Virtual Machine. Vert.x supports a variety of languages letting you choose which one you’d prefer. The Vert.x Core cheat sheet covers the creation of a project using Apache Maven, Gradle or the Vert.x CLI, and references most common Vert.x Core APIs, in 3 different languages (Java, JavaScript, and Groovy). Forgot how to create an HTTP server, use the HTTP client, implement a request-response on the event bus?  Just check the cheat sheet. Together with the Red Hat Developer Team, I’ve put together this handy cheat sheet – hopefully, you’ll find it useful too!

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13 Red Hat sessions at Devoxx Belgium

For any of you planning to attend Devoxx Belgium during the week of 7 November, Red Hatters will be delivering 13 sessions, labs and BoFs and so you’ll definitely want to attend one or more of them when you’re there. Here’s the list in chronological order. Enjoy!

(By the way – if you’re, I’ll be there too so please stop by the Red Hat booth to say “hello”.)

Monday:

Managing Cloud Native Applications with Kubernetes – End-to-End – University

  • Monday from 13:30 – 16:30
  • Speakers:  James Strachan, w/ Ray Tsang and Amanda Waite of Google

Elasticsearch + Hibernate: from artisanal to industrial integration – Tools-in-Action

  • Monday from 16:45 – 17:15
  • Speaker:   Emmanuel Bernard

Easily secure your Front and back applications with KeyCloak – Tools-in-Action

  • Monday from 17:25 – 17:55
  • Speaker:  Sebastien Blanc

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