The CenterDevice Cloud Architecture Revisited
About 2 years ago, I introduced you to the architecture of CenterDevice, and it is now time for an update.... Read more
Posts by Fabian Lange
Video: Is My Profiler Telling The Truth?
My talk about profilers and their inner workings from JavaOne is now viewable for free in its entire length on... Read more
Does My Profiler Tell The Truth? #javaone
On Monday 29th at the JavaOne conference I was proudly presenting my talk about profilers and how they work for... Read more
JCrete – A Java Unconference on Cretan Beaches
(Photo by Stephen Chin) From the 24th to the 29th of August the JCrete took place on the greek mediterranean... Read more
String Deduplication – A new feature in Java 8 Update 20
Strings consume a lot of memory in any application. Especially the char[] containing the individual UTF-16 characters is contributing to... Read more
Using Weld CDI with Vaadin and Push
At codecentric we like to use the Java and GWT framework Vaadin for creation of web applications following the MVP... Read more
Fixing Garbage Collection Issues Easily
What do you do when your Garbage Collection runs all the time? Well usually you would try to introduce some... Read more
Faster and Cleaner Code since Java 7
Every Java developer with more than a few months of coding experience has written code like this before: try {... Read more
Writing better Caches in Action: Improving Joda Time
Working with time and date in any programming language is a mess. To get an idea how much of an... Read more
TableTopDay 2014 at codecentric
codecentric participated this year again at the international TableTopDay, where we celebrate geekdom by playing board games all day. As... Read more
Why 35GB Heap is Less Than 32GB – Java JVM Memory Oddities
When I run the following Java program, which consumes all free memory with artificial data structures, something interesting happens. Something... Read more
Finally – Mission Control and Flight Recorder for HotSpot
There have been plenty of talks on JavaOne 2013 about the release of Mission Control and Flight Recorder with Java... Read more
International #TableTopDay at codecentric
All the geeks at codecentric were pretty excited about TableTopDay, a table top board gaming holiday invented by the fine... Read more
The CenterDevice Cloud Architecture
In this post I want to give you an insight into the architecture of CenterDevice, a document management and collaboration... Read more
Save Memory by Using String Intern in Java
During Attila Szegedis talk about “lessons learned about the JVM“, I was surprised that he emphasized the importance of knowing... Read more
Analyzing Production Outage Caused by Weblogic Compiler Threads
I was at a customer recently to further improve their application monitoring for which they were using AppDynammics. When I... Read more
Find Memory Leaks at Runtime – Addendum
In Act 5 of our OutOfMemoryError series, I talked about the lack of tool support for finding memory leaks at... Read more
Find Java Memory Leaks at Runtime (Act 5)
Act 4 of our series on OutOfMemoryError closed with the promise of better approaches to find memory leaks. We explained... Read more
Web Performance Conference Velocity Europe in Berlin
On November 8th and 9th, the first Velocity Europe conference took place in Berlin. About 500 people from the Web... Read more
Apache Harmony is Dead – Long live Open JDK
The voting is over: Apache Harmony, an open Java implementation, will be discontinued. After IBM stopped supporting Harmony and moving... Read more
Creating a High Performance Cloud Hosted Homepage
When we began thinking about a relaunch of our homepage 3 months ago, we already knew a few key facts... Read more
WordPress and Mod_Pagespeed – why combine_css does not work
In a recent talk about Web Performance Optimization during the Web Tech Conference I recommended mod_pagespeed as a cool automatic... Read more
Measure Java Performance – Sampling or Instrumentation?
In recent discussions, I noticed a confusion about the differences between measuring with Sampling and Instrumentation. I hear about which... Read more
Automatic Java Deadlock Detection
Deadlocks are a nasty thing for programmers. They usually occur never in development environments, but only in production. Also, because... Read more
Create and Understand Java Heapdumps (Act 4)
During the second act of this series we explained Java Memory Leaks. We elaborated how Memory Leaks can occur in... Read more
Java Performance: Drools 5.2 with Decisiontables – Part I
I usually encourage to upgrade early. For me it keeps the overall upgrade effort lower than big bang upgrades. It... Read more
Java Memory Configuration and Monitoring (3rd Act)
In the previous act, we learned about java memory leaks and how memory is consumed. From the first act we... Read more
Pragmatic DSL in Practice, with Java and Drools
When I listened to Martin Fowlers Talk last week at Java User Group Cologne, I felt the urge to talk... Read more
Freemarker Template Caching – Analyzing a Struts2 Performance Problem
During the load tests of a project I noticed the overall response time going down rapidly when more and more... Read more
A Retrospective on 2010
While TV stations record and broadcast their review of the year’s events already in November or December, we follow the... Read more
Web Performance Optimization: Client Side
The last area I want to examine in my series on WPO is the client side. Currently many people look... Read more
Web Performance Optimization: Serverside Software
This part of my series covers the most traditional part of WPO: The (custom written) software that runs on the... Read more
Web Performance Optimization: The Infrastructure
In my previous blog I described three key areas for WPO, one of them being infrastructure with all topics around... Read more
Web Performance Optimization is the new SEO
What is Web Performance optimization? SEO is the way to make your website successful? Not anymore. Search Engine Optimization was... Read more
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... Read more
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... Read more
Report from the GearConf – Good Tools matter
The GearConf is a growing german speaking conference for professional software development. While it is focused on tools, the usual... Read more
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... Read more
Richfaces Sessions Eating Memory – Analysis of a Memory Leak
When developing a site in JSF many people like to use the Richfaces Framework. It is a pretty solid framework... Read more
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... Read more
Invoking System.gc() can have serious impact
Not taking JavaDoc seriously can easily happen to any developer. Or maybe you haven’t read that specific part of it,... Read more
Top Excuses Why Automatic Builds Suddenly Fail
We at codecentric have hundreds of automatic builds run every day, sometimes they … fail. This post is not about... Read more
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... Read more
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... Read more
Automatic Proxy Selection for Mule ESB Webservices
When configuring mule, you might find out that some of your services need to call external parties. Depending on your... Read more
Simple and Fast Webservices with Mule ESB and Apache CXF
In this blog post, I want to show you how we at codecentric are using Mule ESB and Apache CXF... Read more
Java Specialist Master Course Field Report
Last week I had the pleasure attended Heinz Kabutz Java Specialists Master course to sharpen my Java skills. Java Champion... Read more
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... Read more
Looking forward to the Java Specialist Master Course
I will be attending the course by Dr. Heinz Kabutz next week from 2nd-5th of March in Düsseldorf. I have... Read more
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... Read more
A Retrospective on 2009
2009 has passed a few days by now, so I think it would be appropriate to look back on what... Read more
#scrumday in düsseldorf
scrumdays are local smaller sized events where SCRUM communities can meet and exchange their experience. As we are also very... Read more
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... Read more
Mule+CXF struggle with quoted encodings
After upgrading Java to version 1.6.0.17 our CXF based webservices running on Mule ESB did not work anymore.
#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... Read more
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... Read more
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... Read more
Project Lombok – Cool, but too much Magic?
Andreas pointed me at a nice library, lombok. It enhances Java compilation so that classes need less clutter to work.... Read more
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... Read more
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... Read more
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... Read more
Convert InputStream to String
Because searching for “Convert InputStream to String” still brings up solutions involving StringBuffer, byte[] or something like that, developers still... Read more
Eclipse Galileo and SVN
To prove that I can do short posts as well, here a quick guide to SVN in latest Eclipse release.... Read more
Java Framework Marketing
First impression is important, because it sets many of our expectations. When looking for a certain framework or technology to... Read more
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... Read more
Pragmatic Domain Specific Languages in Java
On Tuesday I attended Neal Fords session on DSLs and what they do for us. He showed that Java language... Read more
The End of MySQL?
InnoDB has been the most popular MySQL Storage Engine as the MyISAM Engine was not usable for most use cases... Read more
StringUtils.camelize(String);
Today I noticed that the Apache Commons libs are lacking a method to camelize Strings. Because I needed to convert... Read more
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... Read more
Profiling PHP Applications
We at codecentric are not only leaders in Java performance, but support our clients on a variety of software development... Read more
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.... Read more
Struts2 Interface and EJB issues
Today I want to write about an issue that occurred to me with Struts2, but it is also valid for... Read more
Peter Roßbachs Tomcat 6 Talk at RheinJUG
Peter Roßbach, core developer at the Tomcat project, held a talk at RheinJUG in Düsseldorf on Thursday. It was very... Read more
Connection Sharing Sideeffects
Today Christian and I fought hard with a misterious connection problem. As a part of a longer process a web... Read more
Comparison of Java and PHP for Web Applications
No other language has been causing controversial discussions for a long time as PHP. The codecentric GmbH has specialized in... Read more