Tag Archives: conzilla

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.

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.

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.

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.

Conzilla and Collaborilla go REST

I just released Conzilla 2.2.2 together with Collaborilla 1.1. The biggest improvement of these versions is the switch to RESTful web services, which makes it finally possible to access Collaborilla even in very restrictive networks – the new services use standard HTTP port 80 which shouldn’t be a problem anymore. To make the picture complete, I also added support for HTTP proxies, so there is no excuse anymore for not being able to use Conzilla.

The noteworthy changes since version 2.2.1:

  • Support for Collaborilla 1.1 and the new RESTful web services
  • Support for connections through HTTP proxies
  • Possibility to conditionally empty the disk caches
  • Fix for problem on MacOS which prevented to open URLs in web browsers
  • Fixed some NullPointerExceptions

Go and get it. Or if you already have an older version: just launch it via Java Web Start, the upgrade should then take place automatically.

Conzilla 2.2 released

The Conzilla team is proud to announce the release of Conzilla 2.2.

This is a usability release for improving the user experience and making it easier to perform collaborative conceptual modeling.

The major improvements since version 2.1 are:

  • Undo/redo functionality in edit mode.
  • Advanced logging for improved user feedback.
  • Improved “Offline mode”.
  • Keyboard shortcuts for most important editing actions.
  • Various improvements for editing single concepts and their relations to context-maps and sessions.
  • Context-Map metadata files (.ccm) and associated mime-type for easy opening of context-maps.
  • Support for importing collaboration settings from files, makes initial installation easier.
  • Announcements to the Sindice semantic indexer when publishing context-maps or contributions.
  • “Source view” for viewing a context-map in RDF.
  • Multi-threaded loading of context-maps resulting in smoother surfing.
  • Various improvements in the session manager.
  • New status bar with information on context-maps.
  • Splash screen with progress bar when starting Conzilla.

… and many more bugfixes and new features, see the automatically generated change log of our bugtracker for details!

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.

AJAX, the Web and Everything

Today our research group had, together with some people from Uppsala Learning Lab and IML at Umeå University, a very giving all-day workshop on AJAX and the toolkit Dojo in particular. My colleague Matthias Palmér was talking first about existing approaches for realizing modern web-based applications in general and focused later on the architectures ReST and AJAX. The whole day culminated in doing some hands-on stuff, which means hacking together small applications using Dojo, just for the sake of getting a feeling for how it works or at least how it is supposed to work.

For me it was pretty new terrain. Having done some decent JavaScripts before, the “AJAX using Dojo approach” opened up a load of new possibilities on “how to do things differently” [tm]. Dojo is a powerful toolkit for simplifying such advanced web programming, and I guess I will be using it in a number of applications and prototypes. One of the first (and an important one as well) will be a web-based lightweight version of the concept browser Conzilla. Lightweight means that it will not have any editing support as we know it from the fully-featured Java application. At least not from the beginning. The main purpose will be easy and embeddable presentation of context-maps in different kinds of web documents.

Matthias already developed a prototype which is able to render context-maps directly in the browser. I’m working right now on a Restlet which supports dynamic creation of JSON-data which will be fed into the AJAX client. This will be the foundation of the web-based Conzilla client. Watch out for news on this topic!

Conzilla 2.1.3 is out

This is a bugfix release of the stable branch, which updates also the Collaborilla client library and fixes some unicode issues with published metadata. If you downloaded and installed Conzilla via Java Web Start, then your installation probably has been updated already.

While maintaining the 2.1.x branch, development continues on Conzilla 2.2 which we plan to release during October. The next release will significantly improve usability.

Conzilla 2.1 released

We just released our concept browser Conzilla in version 2.1 together with our collaboration server Collaborilla 1.0. Both applications are open source and have been licensed under the GPL.

The biggest changes from the last version (2.0) are:

  • Support for collaborative conceptual modeling (publication of and contribution to context-maps), supported by the collaboration server Collaborilla.
  • Support for Dialogue Mapping.
  • Java Web Start support for easy installation and maintenance.
  • Refurbished user interface and usability improvements.
  • Export of context-maps to the formats SVG, PNG and JPEG.
  • Bookmarking functionality.
  • Improved layer management.
  • Color theme support.

Conzilla 2.1 requires a Java Runtime Environment in version 1.4.2 or newer.