JavaPolis: Great conference!

I am back again from JavaPolis 2006. It has been a great conference. Belgium is always worth a visit if you like good food, chocolate and beer but JavaPolis is definitely also worth a visit.

The contents of this year's conference was really good (although I have already complained about the lack of Eclipse content :-) ).

The JavaPolis team had improved a lot on the practical matters:

• Short breaks had been scheduled between the conference sessions so that it was actually possible to get from one room to the other in time


• The speakers were kept on a tight schedule - they weren't allowed to exceed their time slot


• The food was a lot better and in adequate supply


• There was wireless internet (although the quality was questionable - they already know this...)


• There were tables with power outlets where you could use your laptop in the breaks

I have a few suggestions for next year's conference:

• Set up LAN cables at the tables. This might lower the load on the wireless network


• Clearly state in the conference program whether a speaker represents a product. I attended (at least in part) several sessions which were in fact product presentations in disguise (the talks were not on the Partner track where this is to be expected). This is quite annoying! It is OK when you know in advance what you are in for (I saw an excellent presentation on Adobe Flex).

Thanks a lot to the JavaPolis team for a great job!

JavaPolis: Where is Eclipse?

I'm a bit amazed to see the number of sessions on Eclipse on this year's JavaPolis.

A search through the conference guide shows three sessions which include the word Eclipse in the description. Of these, two are product presentations on JBuilder 2007 and the Adobe Flex 2.0 development tool (which are both built on Eclipse). The third is on a framework based on Eclipse RCP. Erich Gamma might be expected to mention Eclipse in his keynote on Thursday.

Apart from these sessions there is nothing on Eclipse. I know that there are conferences specifically on Eclipse (EclipseCon, EclipseWorld, both in the U.S., and Eclipse Forum Europe), but still I would have expected to see more Eclipse related content on a general Java conference.

Considering the amount of work taking place in the Eclipse community and the number of projects (a quick count shows ten top-level projects), I wouldn't say that everything has been said on the subject. OK, maybe I'm just a bit disappointed...

JavaPolis: Dynamic Languages Are A Hot Topic

Apparently, dynamic languages in Java are a hot topic. At least if you judge by the size of the audience in the JSR223 - Dynamic Languages on the Java Platform University talk at JavaPolis today. The room was quite packed with people.

The talk was quite interesting. Geert Bevin did the first part on scripting features in Java (he claimed that he was just a stand in for someone else who had made the slides - he did a good job anyway.) Charles Nutter and Thomas Enebo presented their work with JRuby and presented a short demo with JRuby on Rails which is pretty much up and running. Finally, Dierk König presented some of the features in Groovy which is finally approaching its 1.0 release in the end of December - this year :-).

It is interesting to see the movements in dynamic languages on the Java platform. With JDK 6 just released, scripting (in the shape of Javascript) has been integrated into and comes bundled with the JDK itself. More scripting support is coming in future versions of the JDK. It is clear that Sun is putting some focus on the matter by hiring the JRuby guys. As they mentioned, currently they're working on JRuby but in the future they might on scripting support in general.

The ability to actually run Rails in a JVM is also quite interesting. This might make Rails more acceptable for some organizations which would never allow something like Rails on its production environments. When deployed on a Java application server it is basically just Java. Furthermore, JRuby comes with a database adapter for JDBC which adds database support for even more databases than Rails itself. As Thomas and Charles mentioned, you can now run Rails on a mainframe - quite an interesting thought :-)

Groovy is also an interesting language. I have used Groovy in small scale for some time now and have been quite happy with it (apart from the many changes since its inception). Groovy has the advantage over JRuby (and most other scripting for Java) that it is much more Java-like. Also, the Groovy scripts can be compiled into Java classes which allow them to be used from Java code without you noticing it. JRuby doesn't have this ability yet (although the feature is planned.)

There is a talk on Grails on Thursday that I consider seeing. I could hope that Groovy will get the same momentum with its companion web framework, Grails, as Ruby has had with Rails (although I doubt it.)