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Markus Karg

Born in 1973, Markus Karg graduated from German information technology
college in business informatics with specialisation on systems and networks
in 1997. He is talking Java since the same year and contributes to several
open source projects. Following his focus of interest, distributed systems,
he is employed as the design and implementation lead of a medium-sized ISV.
From time to time he is publishing about software technology, like in this
blog or German magazines. In his rare sparetime, he enjoys to have breakfast
out in a cafe with the love of his life, which he married in 2001.

 

Weblogs

JAXB Singletons Made Easy

You want JAXB to unmarshal singletons? You already spent lots of time coding rather complex workarounds applying XmlAdapters and afterUnmarshal callbacks? The solution is astonishingly simple...

JAX-RS 2.0: A first interim report

JAX-RS 2.0: A first interim report

It's been a few months already that the expert group of JSR 339 started discussion about the details of JAX-RS 2.0. The target defined by spec lead Oracle...

Dead Technology Everywhere I Go

Sometimes I wonder why rather good technology suddenly dies. Does anybody remember InfoBus? JavaBeans? Swing? Java?

All of those had been brilliant technologies, enabling programmers doing...

Generic Range Class

Often code has a bad smell, then it gets time to replace custom lines by common patterns. Sometimes it even makes sense to even...

Release late, release rarely

Meanwhile I am looking back to more than 25 years of programming, and more than a decade I spent in a very sensible area where quality (in the sense of zero failures) plays a big role. ...

Making Windows find JARs like it finds EXEs and CMDs

After more than a decade in the Java universe, today I had just enough of remembering where my executable JARs are located and typing all the lengthy path names, so I finally taught Windows to...

Excited about cite

There are times in career when you get excited about having an experience for the first time. I well remember how I got excited about seeing my first self-coded shell node popping up in the...

Apple finally permits Java on the iPhone - When will Oracle deliver?

When the iPhone came to market, Sun Microsystems announced that there soon will be Java for the iPhone. They got...

Using Enumerations in for-each statements - five times faster than the JRE, without RAM limitations

I was such happy when years back the JRE was extended by the Collections Framework. It's just so intuitive to use it, and provides virtually anything the average programmer needs. Compared to the...

JDBC batch mode support in SQL Anywhere 11.0.1: Better late than never!

In my opinion, SQL Anyhwere is the best RDBMS I can think of. I can remember when we started distributing it in Germany back in the early 1990ies, as one of the first early adopters in this...

Web 3.0: Enter the matrix

When I attended college decades back in the early 1990ies, for students of information technology the future looked bright and safe. The cold war was over, the web was growing fastly, and ...

What the heck is going on at former Sun Microsystems?

Mergers and Acquisitions became part of the business model of every mid size to global enterprise: If you're grown big enough, you'll have to either acquire and merge, or you will...

Impact of JDBC use on transaction performance

If you wonder whether the style of use with JDBC API has an impact of performance, you might like to read...

Pimp Your GlassFish: Replacing XSL transformer in GF v2ur2

There are times when things hurt so much that you feel urged to blog about them once solved. This is one of them.

Database Schema Viewer: What do you like to see added?

For meanwhile more than 25 years I am writing computer programs. More than a decade I spent with programs accessing databases, virtually always relational ones. I soon learned that this is...

How RESTful is your RESTful application?

What it means to speak German fluently and to be able of C++

Several years ago one of our key coders moved from the south of Germany (where our HQ is located at the...

What HATEOAS actually means

RESTless about RESTful

These days there is much discussion about REST and HATEOAS, and many people feel urged to reinterpret what HATEOAS means or what Roy Fielding's often-cited...

Unicode™: Write Once, Read Nowhere.

Back in the early 80ies "of the past millenium" (As journalists call it these days - don't you feel as old as I do when...

Welcome back to the computing stone age at java.net

So we're back in the stone age of computing where people have to save their work every other minute to not lose everything.

Like to use XSLT 2.0? Move to Saxon!

For many years I am using XSLT now for a lot of tasks in both, development and runtime environments: Source generation, creating HTML from XML data, or even rendering SVG vector graphics from XML...

Finished my new web site

So finally, after endless nights, my new web site Head Crashing Informatics is finished. Learned a lot on XHTML and CSS by coding it completely by hand (yes, really, did not use any...

Next Generation Performance Benchmark

On last saturday I have run a few experimental benchmarks on the typical new generation technology stack (or part of it). What I exactly did was running iAnywhere 10.0.1 database and Sun...

More on JPA Performance

I used my free day to do some more performance benchmarking using EJB 3.0 and WebServices.

Playing default system sounds in Java

It took me several sleepless nights to find out, but finally I got it - and was astonished how easy it is. Ever wanted to play the default system sound for a specific operation? Well, in fact...

Multithreaded JNI Issues

Blue sky, 25°C, the ideal weather to solve strange JNI problems. So I spent another valueable free day to solve on of the mysteries of mankind: Why is my ShellExtension crashing? (For...

JPA is great but damned slow

I did some experiments with JPA, which is a really cool and simple API for entity persistence. In fact, writing an entity bean is as simple as writing a pojo plus adding some single annotations...

Fullscreen mode is cool

Just found out how easy it is to use the full screen mode in Swing and certainly immediately must write down this blog entry. Using the full screen mode is just as easy as the sample shows:

Did you know that SwingWorker can send progress status?

Java 6 comes with SwingWorker as an integral part of the JRE (yes, you no more need to download it). And THAT version of SwingWorker can send progress status while the background work still is in...

Triggers Done The JPA Way

JPA comes with a way of doing triggers, which is pretty cool: EntityListeners. It is a simple POJO that is annotated as EntityListener, and that gets linked to the triggering event by some outside...

The Missing Link

Attaching a GUI to a domain model object (a.k.a. "Entity") is a boring job. You need to write lots of synchronization code or models to change the UI when the entity changes and vice...