Many thanks for this hint. The JConsole was very helpful, and I have found that the JavaDoc documentation of interfaces in the org.xmlBlaster.engine.admin package lists all available methods, including those for topics - the admin.commands HTML reference seems to be a little outdated, for example "/node/heron/topic/Hello/?key.contentMime" does not work for me (versin 1.6.2), but "/node/heron/topic/Hello/?getContentMime" works fine.Basically, what you can see in jconsole should be available using messages as well.
Best Regards
-- Michael Justin SCJP, SCJA betasoft - Software for Delphiâ and for the Javaâ platform http://www.mikejustin.com - http://www.betabeans.de