Video: Is My Profiler Telling The Truth?

Optimizing iText performance using AppDynamics and YourKit

The following example shows how easy it is to combine a performance monitoring solution with a profiler. On a regular patrol through our AppDynamics monitoring on our continuously integrated projects, I found this interesting HotSpot in iText. iText...

• Java

Phantom java logger causing major performance problems

Recently at a customer, I saw massive amounts of garbage generated, causing many garbage collections, as well as a huge slowdown inside Hibernate code. I browsed through the slow transactions recorded in production by AppDynamics, and was wondering why...

Easy Performance Analysis with AppDynamics Lite

AppDynamics is the rising star in the Application Performance Management sky. Mirko gives a really good description why AppDynamics delivers the right solutions for todays distributed architectures in his Post “Troubleshoot Java in production – introducing...

• Java

A Different Take on Sprint Retrospectives

There are many ways to do a good sprint retrospective, so we decided to try a new one every now and then. This time we took the role of a painter, painting out impression of the last sprint into a formidable piece of art. It might look strange at the...

• Agile methods

WordPress WPML Comments Filter Plugin

I admit, this post is a bit “off-topic”. Recently we migrated this blog from using qTranslate to WPML for publishing in German and English. Main reasons were much better updates and a cleaner separation. But one feature was missing because of that: ...

Style Tests using Selenium and Robotframework

In projects facing end customers style matters, often more than less. While in internal apps it doesn’t matter if the UI changes after each release, there might be customers that want their app to follow a very strict style guide to integrate with their...

• Java
• Testing

codecentric playing at german board game championship

“Dr. codecentric und seine kranken Pfleger”, (codecentric, M.D. and his sick attendants) the codecentric board game team, Andreas Ebbert-Karroum, Torsten Rodemann, Marc Clemens and Fabian Lange (left to right) competed in Dinslakenhighly motivated for...

Hot Coffee and Green Builds

Automated builds and tests already have a long tradition at codecentric, but we never managed to put up build radiators in our new offices. Till today. Developers could have looked up the status in the past, but getting it pushed to you while enjoying...

• Software development
• CI/CD

Meet The Experts Architecture – Open Space: Managing the JAR Chaos

This post shall sum up the results from our fruitful discussion on friday evenig. The idea for the open space discussion was sparked by Stefan Zörner who talked about modularity and what happens when you have no control over modularity. This post will...

• Java
• Community

#devoxx 09: map&reduce and closures

A hot topic here at the Devoxx were the upcoming Java editions with their features and changes in the language syntax. While it is nice that you will be able to switch() on Strings, have a modularized platform and other cool stuff, one thing is a bit...

• Framework
• Java

codecentric Crew visiting #Devoxx 2009

As every year, codecentric Developers are attending the Devoxx. Devoxx in Antwerp is among the top conferences for Java in Europe, known for its hand picked Speakers and excellent topics. No surprise that the depicted 7 gents in codecentric Shirts did...

• Java

JUG Cologne – 5th October – Slides on Eclipse RAP

Having a presentation slot at a Java User Group is always special. Its an audience who cares, or is there just for the buffet. No kidding, todays evening was great. Besides my talk on RAP for which i attach the slides, there were new insights on what...

• API
• Java
• Community
• Frontend

Neal Ford at RheinJUG: Emergent Design & Evolutionary Architecture

Back after having a great evening at todays RheinJUG talk held by Neal Ford. It was almost a perfect fit for our upcoming Meet the Experts – Architecture . Because Neal has the slides on his github , I just want to briefly summarize my personal takeaways...

• Software architecture
• Agile
• Community

Commit every day, or revert – Be agile, every day

One of the biggest problems in agile development teams is “effort”. Of course it is always about effort, because effort is money and we all like our money. In planning we can cope with effort quite easily: “oh that’s a week effort”, but when it comes...

• Agile
• Agile methods
• Agile

JSP Tag Pooling Memory Leaks

JSP custom tags were once widely used, but even still nowadays they find their way into projects. Not to mention the masses of production code using them. And almost all projects I have looked at using custom tags had the same issue. When writing JSP...

• Java
• IT-Security
• Frontend
• Webdevelopment

Convert InputStream to String

Because searching for “Convert InputStream to String” still brings up solutions involving StringBuffer, byte[] or something like that, developers still produce large amounts of different implementations of the same conversion in their projects. In an...

• Java
• Frontend
• Search

codecentric coding night – facts & figures

Hier einige interessante Statistiken zur coding night . Da die coding night ein „Projekt im Zeitraffer“ war, sind die von Hudson bei den automatischen Builds erstellten Statistiken ganz interessant. JUnit Test Ausführung Das erste was auffällt ist,...

• JavaScript
• Java
• Agile Methoden
• Spring

Eclipse Galileo and SVN

To prove that I can do short posts as well, here a quick guide to SVN in latest Eclipse release. This was not that easy in previous releases, but now it works like a charm: Help Install New Software… Galileo – http://download.eclipse.org/releases/galileo...

• Java

Can I change this Code?

“Can I change this code?” sounds like a normal question, but in my opinion it expresses a problem in agile development that needs addressing. Foremost: This is a very good question, because it shows a noble intent: Make code you found better. Following...

• Software architecture
• Agile methods

Data Validation Alongside Agile Development

I would like to discuss an issue one can likely experience with agile development processes and systems which data needs to be maintened during upgrades: A customer care application for a PC retailer was developed so far and the software is running pretty...

• Software development
• Frontend
• Validation
• Webdevelopment

Ajax World Conference in San Jose, CA

From the 20th to 22nd of October the 6th Ajax World Conference took place in the sunny San Jose, CA. I was there those 3 days as delegate of codecentric to catch up with the newest trends and developments in Ajax and RIA. I tried to collect and write...

• API
• Framework
• Java
• JavaScript
• Community
• Frontend
• Webdevelopment