Orignally posted at Red Hat Developers
In an exciting development for Java developers, this September 19th marked the release of JDK 21. This release contains many new capabilities that benefit the Java ecosystem, including virtual threads, record patterns, and sequenced collections. There are also some interesting features in the preview for JDK 21, such as string templates, scoped values, and structured concurrency. This article highlights six new features in this release.
The Keycloak team announced that they were going to move to a new Operator framework that will effictevely manage Keycloak installatons on a Kubernetes cluster. So what is an Operator in the Kubernetes context. Simplyfying it a bit here… Its basically a component that takes over the operational aspects of your application. So rather then managing all of the lifecycle and state in scripts and in our minds in someways is coded into an operator. For us Keycloak Operator does exactly that and in this blog I will cover how to setup a very simple Keycloak installation and get ready for development. If you are interested in knowing more about Operators you will likely find some good info here.
The JDK 21 release is well underway likely to drop around September 19th, and its not GA yet. further more it provides preview features.
It was time for downloading one of the releases and giving it a try. Well I have given it a try some weeks ago so I already had it installed. e.g.
openjdk version "21-ea" 2023-09-19
OpenJDK Runtime Environment (build 21-ea+26-2328)
OpenJDK 64-Bit Server VM (build 21-ea+26-2328, mixed mode, sharing)
The fun thing though is that there are couple of very cool features that are still in preview. e.g. I tried to use the StringTemplates mentioned in the InfoQ blog
If you are into Computer vision, you probably are familiar with OpenCV. Its an amazing library that has almost everything one needs to do 2D and 3D processing and much more. Gesture recognition, face detection, Motion tracking, think of anything related to image processing and OpenCV can be your goto. Its based on the BSD license, so you can just download it and start using it.
OpenCV is written in C, and there are nice Java bindings for it too. If you are a Java developer like me and dont want to get into all the loading and building native bindings etc., then read on. In this article I will show how you can use OpenCV with the popular new framework Quarkus, without worrying about installing libraries or reloading the entire app.
