$xwiki not always available?

[Thomas Drevon]

Hi!

I've made a panel that displays tags in a tag cloud (size relative to 
occurrence). But on a few occasions I get an exception, and I've managed 
to pinpoint fairly accurately under what circumstance. The code 
involved, that usually works is this:

#set($query = "select elements(prop.list) from BaseObject as obj, 
DBStringListProperty as prop where obj.className='XWiki.TagClass' and 
obj.id=prop.id.id and prop.id.name='tags'")
#set( $allTags = $xwiki.search($query))
#set( $allTagsSorted = $xwiki.sort($allTags))

If the user is not logged in, and presses the login link in the top left 
corner (--> /xwiki/bin/login/XWiki/XWikiLogin), the panel returns the 
enclosed exception. After some debugging, it seems that $allTags is not 
assigned a value from $xwiki.search($query). This leads me to believe 
that $xwiki might not be available from this particular context. Has 
anyone else encountered this, or is it an artifact in my environment?

I'm running xwiki v1.1-milestone2, mysql, winxp, tomcat, java5. Both my 
db and xwiki installs are pretty fresh and un-tampered with.


best regards :-)
Thomas

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