I think it's useless for normal WFS GetFeature requests. Only for the resultType=hits requests it's useful IMHO.
Best regards, Bart > "The optional numberOfFeatures attribute is used to indicate the > number of features that are in the response document." > > Why not just ignore it by default (maybe a configuration flag to force > it). > > Does anyone know of any clients that rely on it (even though its > optional?) > > Rob > > On Tue, Nov 23, 2010 at 7:58 PM, v...@csiro <victor....@csiro.au> wrote: >> >> Hi Everyone, >> >> I have lately been investigating into improving the performance of >> app-schema. One area of concern is the building of features to count it >> and >> rebuilding it again to encode it (therefore building it twice) which >> obviously have performance overhead. >> >> I have been testing out possible options and I am at a lost in how this >> can >> be achieved. I was hoping someone in the community have some solutions. >> >> These is some of the ideas I have tried and why I think it is not >> feasible. >> Please do correct me if i am wrong >> >> - Serializing the featurecollection when its counting therefore no need >> to >> rebuild on encoding. >> * The feature is a complex beast for serialization as it is deeply >> nested. >> To serialize it, every object instance it reference must be serializable >> as >> well. I tried JBoss Serialization which claimed that the objects are not >> required to implement Serializable but that didn't seem like the case >> when i >> was testing it. >> >> - ignore the count and build the feature(while counting at the same >> time) >> then updated the numberOfFeature after it has finish building. >> * From walking through the code, the numberOfFeature is set in >> Encoder.start >> line 1107: serializer.startElement(uri, local, qName, atts); The >> features >> are stream and not cached due to possible memory overflow therefore is >> it >> still possible to change the value after it has been streamed? If yes >> can >> someone guide me where it can be achieved? >> >> - Xstream >> * Tried XStream as a mean to serialize objects into xml but Xsteam died >> on >> while attempting the task. It has performanace overhead as well and not >> the >> best solution. >> >> >> - last resort >> * instead of streaming the result out, perhaps I can stream the results >> to >> disk, updated the numberOfFeatures then return it? but this will have >> impact >> on the outputstrategy. >> >> Please advice thanks :D >> -- >> View this message in context: >> http://old.nabble.com/App-Schema-performance-tp30283782p30283782.html >> Sent from the GeoServer - Dev mailing list archive at Nabble.com. >> >> >> ------------------------------------------------------------------------------ >> Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! >> Tap into the largest installed PC base & get more eyes on your game by >> optimizing for Intel(R) Graphics Technology. Get started today with the >> Intel(R) Software Partner Program. Five $500 cash prizes are up for >> grabs. >> http://p.sf.net/sfu/intelisp-dev2dev >> _______________________________________________ >> Geoserver-devel mailing list >> Geoserver-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/geoserver-devel >> > > ------------------------------------------------------------------------------ > Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! > Tap into the largest installed PC base & get more eyes on your game by > optimizing for Intel(R) Graphics Technology. Get started today with the > Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. > http://p.sf.net/sfu/intelisp-dev2dev > _______________________________________________ > Geoserver-devel mailing list > Geoserver-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geoserver-devel > ------------------------------------------------------------------------------ Increase Visibility of Your 3D Game App & Earn a Chance To Win $500! Tap into the largest installed PC base & get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev _______________________________________________ Geoserver-devel mailing list Geoserver-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-devel
