Hi, I am now looking into the new mime based connent filtering/query stuff. I do look verry promissing. However I have one problem with it. Let me explain my problem domain.
We use XPATH based querys to route content. To be able to do this before the mime filters where invented we stuffed the content XML into the key header part. This has worked fine. It however has a couple of flawes: 1. The key part is merged into the dom. The more XML content, the more expensive. 2. Since XML blaster has not inherant notion of a destination in the JMS sense all content published will be parsed/queried by all XPATH queries, even if the are not at all applyable to the content. Therefore I would like to migrate to the mime based aproach. If I understand it correctly it would the be possible to publish with a for for example channel tag in key, have client filter exact on that (or oid, I do not remember) and then let the I_Access filter have its say only for the one that actually matched exact first. In that way we could lower the number of queries put against each message. However: we must be able to handle huge number of queries > 100 000. With the current I_AccesFilter implementation this does not seem like an options. Why. If I understand it correctly, each subscription means an instance of an I_AcessFilter. The broker will, for each subscriber, check the filter. The filter takes the "raw" MessageUntit. What does that mean: if I want to write an XPath based content router I would have to recreate a DOM tree of the content in each filter. Say I have 5000 different quieries to be placed against the same content, I would have to create 5000 DOM trees of the same content. This will be verry slow. Is there any chance we could for mime type xml have a precreated DOM tree of the content available in the filter? //Peter -- ------------------------------------------------------------ Peter Antman Chief Systems Architect, Business Development Technology in Media, Box 34105 100 26 Stockholm WWW: http://www.tim.se WWW: http://www.backsource.org Email: [EMAIL PROTECTED] Phone: +46-(0)8-506 381 11 Mobile: 070-675 3942 ------------------------------------------------------------
