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Since a few days it is official: The Subversion project has submitted to become an Apache project. It seems that the incubation phase will start soon. Now my question: Subversion is conceptually dead, so what difference does that make? Ok, let's discuss this a little more in detail:The thing is: most developers (even myself) meanwhile understand the concept of DSCM systems and all available

On August 13th, more than 50 other people, interested in open source software, attended the 8th Google Open Source Jam in Zurich, which is an informal (bar-camp like) meet-up at Zurich office (also available in other parts of the world) and a perfect opportunity to meet other open source developers as well as Google engineers in a relaxed atmosphere. As it is open to everyone, people held

I am using Mercurial a lot recently (and love it); I really do wonder, why I struggled so long with Subversion. When I first heard the GIT presentation from Linus Torvalds (which is, hm, very entertaining) the whole distributed SCM thing sounded very esotheric for me. However I decided to give it a try, also motivated by the great Chaosradio Express 130 Podcast (German). Yet, I decided to go with

Following up a question I received via Twitter, and the fact, that a significant part of the developer-community is using Macs, I thought this might be a good opportunity to discuss some "UML Options" for the Mac. Now, this article is not meant as a definitive answer, I would hope for some follow-ups by readers in the comments.Ok lets start: First there is heavy weight stuff, most notable Visual

At thte last Maven Meetup Jason van Zyl talked about the future of Maven and important milestones of Maven 3, including:Support of incremental buildingsChanges about the Plugin-APIBetter Multilanguage supportand moreThe video and slides about the presentation are available here.

Now it finally happened: Oracle bought Sun for 7,4 billion dollar. It sure is a little bit surprising, as the deal with IBM seemed to be settled already. From a developers point of view, the Oracle deal might be better for the community, allthough it also has certain risks.For IBM Java is strategically very important, insofar Java would have been "save" with IBM. Additionally IBM has developed (

In this blog of sonatype there is a useful list of best practices with Maven, including:Why putting repositories in your pom is a bad ideaBest Practices for releasing with 3rd party snapshot dependenciesMaven Continuous Integration Best PracticesHow to detect if you have a snapshot versionOptimal Maven Plugin configurationAdding additional source folders to your maven buildMisused maven terms

In a current ZDNet Blog Posting, Sam Diaz analyses the recent technical issues Twitter has (again). Twitter is growing dramatically in the last months and apparently the Twitter backbone is increasingly in trouble. The same happened already about a year ago.The analysis of Sam Diaz is of course correct, but in my opinion he still completely misses the point in discussing technical issues why

As I nagged yesterday about the fact, that AppEngine has no proper Maven-build system, already today the guys at Sonatype reacted ;-)They describe preliminary attempts in how to "Mavenize" AppEngine projects; hope they will be able to fix also the last issues!

AppEngine is a rather recent new service from Google. It is probably Google's answer to Amazon's cloud-computing platform, yet targets a very different market. Where Amazon offers a a broad range of services and high flexibility (with the disadvantage of higher administration effort) Google targets web-developers that want to publish web-applications. AppEngine started with a Python environment,

Finally hsqldb 1.9 (alpha, though) is released. This release was announced for, I believe, nearly one year. It seemed to me already that hsqldb is a rather dead projects. I am glad they made the next round, because in a way I still like that system a lot. Sure, Apache Derby is most likely the superior system, and H2 looks very promising too (but is still, as I understand it, a "one man show"

XML processing is an important part in present software systems, especially when communicate with other software components in the IT infrastructure. Pretty often you must provide your object data as XML. The Open Source market provides a wide range of XML tools, above all XML mapping tools, like Castor, JAXB and others. A very intersting and compact tool, existing since 2004 is XStream hosted on

I published a german on article on JAXCenter about data transformation in Service Oriented Architecture. When different applications talk to each other, you must find a suitable data format which all applications can interpret. For the most cases XML is the first choice, because there is a wide range of tool support and additional standards, like Schema Editors, XPath and the like.In this article

I published an article about the new Mule IDE in the current issue of the Eclipse Magazin. In the article I give an overview about Mule and how the IDE supports developers to model their Mule applications. The IDE provides the following features:Mule project wizardMule runtime configuration (you can define different Mule runtimes)Graphical Mule Configuration EditorStart your Mule Server from your

I recently informed myself about the (Sun) Glassfish J2EE server. I never took it as a serious competitor in the field, as I had the impression it is just a reference implementation that is from Sun... However, I had to change my opinion. In the recent years it seems, that the Glassfish community worked hard on their baby and currently it seems to be a solid competitor in the field.The Glassfish

There is now a new blog which takes his focus only on Mule, by providing technical tips, comments and breaking news around the Mule product line (ESB, Mule Galaxy,..). Blogger from this blog are only developers from Mule Source and members of the Mule Service Team, which means that you get the information from first hand. There are already posts, e.g. how to write custom transformers in Mule or

The architectural style REST has gained some popularity and is often brought up against SOAP for interoperable web services. REST stands for Representational State Transfer and has some characteristics that distinct itself from other architectural styles:Resources such as a person, an order, or a collection of the ten most recent stock quotes are identified by a (not necessary unique)

For anybody who doesn't know the Open Source ESB Mule, I can recommend the presentation from Ross Mason hold on the Java Polis conference. In this presentation Ross gives an overview about Mule, including the component architecture and new features in Mule 2. Other relevant topics are:Develop services in MuleDealing with web services in MuleException strategiesTransaction

Last week I joined the CEE-SET conference in Brno. On the conference I presented a paper written by Robert Thullner, Josef Schiefer and myself: We analyse the application of Open Source frameworks in implementing enterprise integration patterns. For that matter a series of scenarios was implemented with (combinations) of different frameworks like Apache Active MQ, Apache Camel, Apache Service Mix

The last couple of years major Open Source ESBs, including MuleSource and ServiceMix, have been expanded and are used in critical business solutions. Tijs Rademakers and Jos Dirksen offer a book which gives an overview about Open Source ESBs and which combination of Open Source technologies with ESBs are used. The main open source solutions covered in this book are Mule and ServiceMix. Therefore