On Fri, Jun 17, 2005 at 02:19:26PM +0200, J?rgen Herrmann wrote: > hi all! > > i make heavy use of indexes in my extension classes. these all inherit > from catalogpathaware, so i have to call object.reindex_object() on > each changed instance. calling it from attribute getters/setters f.ex. > is not a good idea, because changing 3 attributes will reindex the object > 3 times. > > what i'd like to have is that such objects are reindexed automatically > before comitting a transaction. > > is it possible? where should i start looking in the source, is there > possibly a before_transaction_commit hook?
I vaguely recall a similar discussion on zodb-dev; a search of the archives of that list may be a good idea. You might also find QueueCatalog useful. AFAICT, if you are using QueueCatalog and an object asks to be reindexed three times before the next time the queue is processed, the QueueCatalog will only actually reindex the object once. The tradeoff is that the catalog results can be stale. It's only available via CVS, and doesn't come with docs, but the embedded docstrings look pretty good. Note, I haven't used it yet myself. http://cvs.zope.org/Products/QueueCatalog/ Or to get a tarball, http://cvs.zope.org/Products/QueueCatalog/QueueCatalog.tar.gz?tarball=1 It looks like you need some external process to actually trigger the processing of the queue. A cron job calling a wget script would do the job, or (better imho because it runs as a separate process) if you are using zeo you could run a pretty trivial python script via bin/zopectl ... something like (untested): import time while 1: time.sleep(30) events_count = app.path.to.my.queuecatalog.process(max=1000) print "processed %d events" % events_count # or log it somewhere. Hope that helps, -PW -- Paul Winkler http://www.slinkp.com _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )