Hi Jonathon, Since the number of users in your application is small, perhaps you could apply a pre-generated filter per user, and apply this to the search, however this won't scale well if the number of users grow.
Another idea might be to have several filters,each of which detail a particular type of access rather than a filter / user. Then using the ChainedFilter chain together these filters, depending on the user, at query time. Regards, Dan On 4/3/07, Jonathan O'Connor <[EMAIL PROTECTED]> wrote:
Hi, I have a database of a million documents and about 100 users. The documents can have an access control list, and there is a complex, recursive algorithm to say if a particular user can see a particular document. My problem is that my search algorithm is to first do a standard lucene search for matching documents, and then check security on each one found, just returning the allowed documents. However, if I do this, and the lucene returns 100000 docs, but the user can only see 10 of these, then obviously the search is going to take an awful long time. Has anyone come across this problem before, and if so what approach did you take? I guess I could precalculate the permissions for every user-document pair, but that's alot of storage, and a lot of precalculation! I await the list's accumulated wisdom with eagerness and interest. Thanks, Jonathan O'Connor XCOM Dublin *** XCOM AG Legal Disclaimer *** Diese E-Mail einschliesslich ihrer Anhaenge ist vertraulich und ist allein für den Gebrauch durch den vorgesehenen Empfaenger bestimmt. Dritten ist das Lesen, Verteilen oder Weiterleiten dieser E-Mail untersagt. Wir bitten, eine fehlgeleitete E-Mail unverzueglich vollstaendig zu loeschen und uns eine Nachricht zukommen zu lassen. This email may contain material that is confidential and for the sole use of the intended recipient. Any review, distribution by others or forwarding without express permission is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. Hauptsitz: Bahnstrasse 37, D-47877 Willich, USt-IdNr.: DE 812 885 664 Kommunikation: Telefon +49 2154 9209-70, Telefax +49 2154 9209-900, www.xcom.de Handelsregister: Amtsgericht Krefeld, HRB 10340 Vorstand: Matthias Albrecht, Renate Becker-Grope, Marco Marty, Dr. Rainer Fuchs Vorsitzender des Aufsichtsrates: Stephan Steuer
