Archive for Software

Host Networking with VirtualBox 2.1

Finally. The new version of Sun’s VirtualBox makes the fiddling with tunnels obsolete. It basically works the same way as in VMware now.

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New release of Java 1.5

Sun released Java 1.5.0_17 today. This release fixes (among other things) the regression bug of Java 1.5.0_16 which made it impossible to view and edit metadata in Conzilla. I wrote about this in a previous blog post.

Generally I recommend to use Java 1.6, but if you have to use 1.5 for some reason you can get the new version directly from Sun.

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WOD-PD 2008 | Web of Data Practitioners Days

On Wednesday and Thursday I attended the Web of Data Practitioners Days (WOD-PD 2008) at “Altes AKH” in Vienna. AFAIK it was the first event of such a kind, it was something in between academic presentations and hands-on sessions, everything about Semantic Web and its related technologies.

I liked this format of a workshop very much, especially the “hacking session” in the evening of the first day with its “lightning talks”, and of course the socializing in between the talks. I finally had the chance to talk to some guys I already knew from various blogs and publications, but never have met in real life.

The Semantic Web Company (an austrian company who is pushing the Semantic Web topic really hard forward) was represented by Jana Herwig and published a few blog posts summarizing the talks of the event:

The proceedings are online with almost all presentations and links to the web sites which were used for the hands-on sessions.

Oh yes, of course there are pictures online on Flickr tagged with wodpd2008.

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Recent problems with launching Conzilla

I got several emails these days from people who were not able to launch Conzilla anymore. The reason was an exception (“java.net.MalformedURLException: no !/ in spec”) during start up.

I investigated the problem (which is caused by a regression bug of Sun’s most recent Java 5.0, i.e. 1.5.0_16) and tried to work around it, but came to the conclusion – as many other developers who tried to solve the very same problem – that it is best to wait for a fix from Sun.

The reason is that it would require too many changes in the code and even some major refactoring. Apart from that, even third-party libraries as e.g. log4j are affected. Conzilla is not the only application which has been broken, basically all applications making use of Java Web Start are affected.

Bugs have been reported to Sun:

http://bugs.sun.com/view_bug.do?bug_id=6746185
http://bugs.sun.com/view_bug.do?bug_id=6753651

Let’s hope that Sun fixes this bug very soon, until then my recommendation is: Do not use JRE/JDK 1.5.0_16, and if you happen to use it, downgrade to an earlier release, or upgrade to 6.0/1.6.

I will keep you informed regarding this issue.

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Conzilla 2.2.5 released

Two bug fixes:

  • Corrected SHAME ULM formlets. because of a typo some URIs were invalid upon automatic generation.
  • Fixed an error related to serialization to RDF/XML. in some rare cases just N-TRIPLE worked. Saving to RDF/XML and RDF/XML-ABBREV works again.

Conzilla should update itself through Java Web Start when you start it next time.

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Conzilla 2.2.4 released

Two bug fixes:

  • Non-ASCII URIs could not be properly published to Collaborilla (this bug made this quick bug fix release necessary)
  • The reload button did not take the threaded/unthreaded setting into consideration

As usual, Conzilla should update itself through Java Web Start. Have fun.

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Conzilla 2.2.3 released

This is a maintenance release, fixing the following bugs:

  • “Contexts” context menu was disabled when clicking for the first time
  • Shortcut and menu for closing a tab/context-map did not work
  • “Window”-view could not be closed via X-button in the window frame
  • “Save” button was always enabled
  • HTTP implementation of RemoteStorage did not timeout properly
  • Multithreaded loading of maps caused problems; it is optional now and deactivated it by default
  • Sindice client did not time out
  • Metadata popup sometimes showed up beneath map elements
  • Added menu to manually clear the container and metadata caches
  • Content URLs did not open in a browser on newer MacOS systems

Conzilla 2.2 requires a Java Runtime Environment in version 1.5 or newer and can be installed via the download page. If you already have an installation of Conzilla 2.1 it should be sufficient to launch Conzilla via the shortcuts. Java Web Start will then take care of the upgrade.

If you have comments or suggestions you can send them directly to the Conzilla mailing lists.

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