Author Archives: Markus Karg

About Markus Karg

Java Guru with +30 years of experience in professional software development. I travelled the whole world of IT, starting from Sinclair's great ZX Spectrum 48K, Commodore's 4040, over S/370, PCs since legendary XT, CP/M, VM/ESA, DOS, Windows (remember 3.1?), OS/2 WARP, Linux to Android and iOS... and still coding is my passion, and Java is my favourite drug!

Coding Microservice From Scratch (Part 16) | JAX-RS Done Right! | Head Crashing Informatics 83

Posted on 19. November 2023 by Markus Karg

Write a pure-Java microservice from scratch, without an application server nor any third party frameworks, tools, or IDE plugins — Just using JDK, Maven and JAX-RS aka Jakarta REST 3.1. This video series shows you the essential steps! You asked, … Continue reading →

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Jersey Performance Improvement (Step One) | Code Review | Head Crashing Informatics 82

Posted on 4. November 2023 by Markus Karg

Let’s take a deep dive into the source code of #Jersey (the heart of GlassFish, Payara and Helidon) to learn how we can make our own I/O code run faster on modern Java. In this first step, we apply NIO … Continue reading →

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Jersey powered by NIO | The Two Minutes Tuesday 041 | Open Source

Posted on 24. October 2023 by Markus Karg

Thanks to my latest contribution, #Jersey now runs on #NIO – and is considerably more efficent. 🚀 #performance #java If you like this video, please give it a thumbs up, share it, subscribe to my channel, or become my patreon … Continue reading →

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Now I am JCommander committer | The Two Minutes Tuesday 040 | Open Source

Posted on 10. October 2023 by Markus Karg

Since few weeks I am committer and release manager of JCommander. 🚀 If you like this video, please give it a thumbs up, share it, subscribe to my channel, or become my patreon https://www.patreon.com/mkarg. Thanks! 🙂

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Contributing to OpenJDK | The Two Minutes Tuesday 039 | Open Source

Posted on 26. September 2023 by Markus Karg

I really adore to be part of #OpenJDK! 😃 If you like this video, please give it a thumbs up, share it, subscribe to my channel, or become my patreon https://www.patreon.com/mkarg. Thanks! 🙂

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Welcome to the Liquibase Community | The Two Minutes Tuesday 038 | Open Source

Posted on 12. September 2023 by Markus Karg

I have fixed a lot of bugs in Liquibase, but it was worth it! If you like this video, please give it a thumbs up, share it, subscribe to my channel, or become my patreon https://www.patreon.com/mkarg. Thanks! 🙂

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No videos for long time! | The Two Minutes Tuesday 037 | Announcement

Posted on 29. August 2023 by Markus Karg

I feel very bad for letting you wait so long for new videos. But more open source stuff is in the queue! If you like this video, please give it a thumbs up, share it, subscribe to my channel, or … Continue reading →

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JCommander 1.83

Posted on 24. August 2023 by Markus Karg

Some weeks ago Cédric BEUST (the founder of JCommander, TestNG and GMail on Android) granted committer status to me, and appointed me as the release manager of JCommander. The first means, I can push commits into the Github repo. The … Continue reading →

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Coding Microservice From Scratch (Part 15) | JAX-RS Done Right! | Head Crashing Informatics 81

Posted on 8. July 2023 by Markus Karg

Write a pure-Java microservice from scratch, without an application server nor any third party frameworks, tools, or IDE plugins — Just using JDK, Maven and JAX-RS aka Jakarta REST 3.1. This video series shows you the essential steps! In this … Continue reading →

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Coding Microservice From Scratch (Part 14) | JAX-RS Done Right! | Head Crashing Informatics 80

Posted on 24. June 2023 by Markus Karg

Write a pure-Java microservice from scratch, without an application server nor any third party frameworks, tools, or IDE plugins — Just using JDK, Maven and JAX-RS aka Jakarta REST 3.1. This video series shows you the essential steps! Watch this … Continue reading →

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