I saw this old thread and could just fill in with more information. So, the IndexService.getNodes() now returns an IndexHits result, which is an Iterable with a size() method on it. The size is given back from lucene so there's no overhead in calling size() at all.
The LuceneIndexService will create a new document for each call to LuceneIndexService.index() method. This is because it'd be quite slow to try to merge with potential existing matches a.s.o. 2009/9/18 Andreas Kollegger <akolleg...@tembopublic.org>: > For my use cases at least, total node counts are needed so often that > I'd love the optimized version. What's the relationship between > number of documents and nodes? Would that be all indexed nodes > regardless of the key? > > On Sep 18, 2009, at 3:46 AM, Mattias Persson wrote: > >> Looking at the Lucene javadocs I can see that you can ask an index >> (IndexReader) the number of documents there are in it and it'd be >> simple to expose a size() method in the IndexService interface or >> perhaps on the LuceneIndexService class... >> >> Would that be something worth/good to implement? >> >> 2009/9/18 Andreas Guenther <andreas.guent...@web.de>: >>> actually, disregard my suggestion as I didn't read the word index >>> in your question before. >>> >>> -AndreasAndreas Guenther wrote: >>> >>> The service API has a getAllNodes() call. Iterate and count through >>> it. >>> >>> >>> >>> -AndreasAndreas Kollegger wrote: >>> >>> >>> >>> Hi all, >>> >>> >>> >>> >>> >>> >>> >>> For nodes that are kept in the indexed service, is there a more >>> clever >>> >>> >>> >>> (and hopefully efficient) way to get the node count than manually >>> >>> >>> >>> iterating over all the nodes in the index and actually counting. I >>> >>> >>> >>> don't see anything obvious in the IndexService() interface, and am >>> not >>> >>> >>> >>> sure if I've overlooked something useful somewhere else. >>> >>> >>> >>> >>> >>> >>> >>> I suppose I could always keep a running tally somewhere, but then I'd >>> >>> >>> >>> have to be careful to keep it in sync with reality. Ideally the count >>> >>> >>> >>> would be closer to the metal. >>> >>> >>> >>> >>> >>> >>> >>> Thanks, >>> >>> >>> >>> Andreas >>> >>> >>> >>> _______________________________________________ >>> >>> >>> >>> Neo mailing list >>> >>> >>> >>> User@lists.neo4j.org >>> >>> >>> >>> https://lists.neo4j.org/mailman/listinfo/user >>> >>> >>> >>> >>> >>> _______________________________________________ >>> >>> Neo mailing list >>> >>> User@lists.neo4j.org >>> >>> https://lists.neo4j.org/mailman/listinfo/user >>> >>> >>> _______________________________________________ >>> Neo mailing list >>> User@lists.neo4j.org >>> https://lists.neo4j.org/mailman/listinfo/user >>> >> >> >> >> -- >> Mattias Persson, [matt...@neotechnology.com] >> Neo Technology, www.neotechnology.com >> _______________________________________________ >> Neo mailing list >> User@lists.neo4j.org >> https://lists.neo4j.org/mailman/listinfo/user > > _______________________________________________ > Neo mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Mattias Persson, [matt...@neotechnology.com] Neo Technology, www.neotechnology.com _______________________________________________ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
