An Update Center module can be an addon module or an archive module. For an archive type module, the addons.* interfaces need not be implemented. Let's take a closer look at the addon module.
Take a look at my earlier blogs on creating and
testing UC addon modules for starters...
For addon modules, you need to look at the Configurator and Installer APIs.... Here's the package tree.
Sun's Weblog server for Glassfish was released earlier this week.
The bits are available through the Glassfish update center. To get to them, launch $GLASSFISH_HOME/updatecenter/bin/updatetool.
Once the update tool is up and running choose Social Software category components and click install.
The instance of GlassFish will now be weblog enabled!