Hello,
The problem is SlowCompositeReaderWrapper.wrap(searcher.getIndexReader());
you hardly ever need to to this, at least because Solr already does it.
DocValues need to be accessed per segment, leaf/atomic/reader/context
provided to collector.
eg look at DocTermsIndexDocValues.strVal(int)
DocTermsIndexDocValues.open(LeafReaderContext, String) or
TermOrdValComparator and TopFieldCollector.
On Wed, Jun 10, 2015 at 6:59 PM, adfel70 <adfe...@gmail.com> wrote:
>
> I am using RankQuery to implement my applicative scorer that returns a
> score
> based on the value of specific field (lets call it 'score_field') that is
> stored for every document.
> The RankQuery creates a collector, and for every collected docId I retrieve
> the value of score_field, calculate the score and add the doc id into
> priority queue:
>
> public class MyScorerrankQuet extends RankQuery {
> ...
>
> @Override
> public TopDocsCollector getTopDocsCollector(int i,
> SolrIndexerSearcher.QueryCommand cmd, IndexSearcher searcher) {
> ...
> return new MyCollector(...)
> }
> }
>
> public class MyCollector extends TopDocsCollector{
> MyScorer scorer;
> SortedDocValues scoreFieldValues; //Initialized in constrctor
>
> public MyCollector(){
> scorer = new MyScorer();
> scorer.start(); //the scorer's API needs to call start()
> before every query and close() at the end of the query
> AtomicReader r =
> SlowCompositeReaderWrapper.wrap(searcher.getIndexReader());
> scoreFieldValues = DocValues.getSorted(r, "score_field");
> /*
> THIS CALL IS TIME CONSUMING! */
> }
>
> @Override
> public void collect(int id){
> int docID = docBase + id;
> //1. get specific field from the doc using DocValues and
> calculate score using my scorer
> String value = scoreFieldValues.get(docID).utf8ToString();
> scorer.calcScore(value);
> //2. add docId and score (ScoreDoc object) into
> PriorityQueue.
> }
> }
>
>
> I used DocValues to get the value of score_field. Currently its being
> instantiate in collector's constructor - which is performance killer,
> because it is being called for EVERY query, even if the index is static (no
> commits). I want to make the DocValue.getStored() call only when it is
> really necessary, but I dont know where to put that code. Is there a place
> to plug that code so when a new searcher is being opened I can add my this
> applicative cache?
>
>
>
> --
> View this message in context:
> http://lucene.472066.n3.nabble.com/Adding-applicative-cache-to-SolrSearcher-tp4211012.html
> Sent from the Solr - User mailing list archive at Nabble.com.
>
--
Sincerely yours
Mikhail Khludnev
Principal Engineer,
Grid Dynamics
<http://www.griddynamics.com>
<mkhlud...@griddynamics.com>
