On Mon, Mar 13, 2006 at 06:23:10PM +0530, Satuluri, Venu_Madhav wrote: > Hi, > > Is there an elegant way to keep RAMDirectory and my file-system based > index in sync? I have a java class that is periodically started up by > crond that checks for modified documents and then reindexes them onto > the filesystem. However, for searching I want to use RAMDirectory (for > the performance benefits). The process that searches is alive all the > time (its in the backend of a webapp), and is different from the process > that indexes.
You could somehow (HTTP, Database flag, some messaging system) ping your backend from your Indexing process, once it's finished. The Searching process then would have to re-open it's RAMDirectory. Or you check the version of the fs-based index from time to time, to see when it has changed. Using IndexReader.getCurrentVersion (path_to_index) this shouldn't be too expensive. But there's the risk that you re-open your RAMDirectory in the middle of an index update, since the version changes on every single modification done to the index. I don't know of any more elegant ways. Jens -- webit! Gesellschaft für neue Medien mbH www.webit.de Dipl.-Wirtschaftsingenieur Jens Krämer [EMAIL PROTECTED] Schnorrstraße 76 Tel +49 351 46766 0 D-01069 Dresden Fax +49 351 46766 66 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
