-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Andrew,
Andrew Martin wrote: > I am interested to know the ‘best’ practice for navigating through > long lists. I haven't used Struts-layout, so I'm not sure how my suggestion will fit-in with your preferred display engine, but here goes, anyway. We have a search application that uses Lucene as an index and a database to store the actual data. Searches are performed using Lucene and then the real data is fetched for display. Needless to say, many results may be returned, so paging is necessary. Lucene basically returns an list of record ids to us, which we store in an array of ints, which is relatively small (even if /all/ records match the query, we'll only get 15k of ids back). We wrap that list in a "paged record" which contains a cache. This paged record object has a "getRecord" method that first checks to see if the record has already been loaded in the cache, and returns it if it was there. If it's a cache miss, then the cache is emptied and we load an entire "page" of records from the database to fill the cache. This allows the pager to believe that it's iterating through a complete list of data, while the underlying object is actually caching and discarding data so that only the essentials are kept in memory (that is, the complete list of record ids and the current page of full records). We keep that object in the user's session so that page reloads don't have to go back to the database and are nice and fast. I hope that helps, - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFnQf19CaO5/Lv0PARAjO1AKC6iBQgG0LNlbfGpCbotNgxt2MCdwCgu7eJ oSdgiNJCQu9PCWo5zB/vIHw= =ewkK -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
