Hi

How do you expose a pagination without a customized hit collector. The multi searcher does not expose a method for hit collector and sort. Maybe this is not an issue for people ...

Cheers

Amin

On 20 Mar 2009, at 17:25, "Uwe Schindler" <u...@thetaphi.de> wrote:

Why not use a MultiSearcher an all single searchers? Or a Searcher on a MultiReader consisting of all IndexReaders? With that you do not need to
merge the results.

By the way: instead of creating a TopDocCollector, you could also call
directly,

Searcher.search(Query query, Filter filter, int n, Sort sort)
Searcher.search(Query query, Filter filter, int n)

Filter can be null.

It's shorter and if sorting is also involved, simplier to handle (you do not
need to switch between ToDocCollector and TopFieldDocCollector).

Important: With Lucene 2.9, the searches will be faster using this API
(because then each index segment uses an own collector).

Uwe


-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: u...@thetaphi.de

-----Original Message-----
From: Paul Taylor [mailto:paul_t...@fastmail.fm]
Sent: Friday, March 20, 2009 6:02 PM
To: java-user@lucene.apache.org
Subject: Performance tips on searching


Hi, my code receives a search query from the web, there are 5 different searches that can be searched on - each index is searched with a single IndexSearcher referenced in a map. it parses then performs the search and return the best 10 results, with scores readjusted over the results so that the best score returns 1.0. Am I performing the optiminal search
methods to do what I want ?

thanks Paul

       IndexSearcher searcher = searchers.get(indexName);
       QueryParser parser = new QueryParser(indexName, analyzer);
       TopDocCollector collector = new TopDocCollector(10);
       try {
           searcher.search(parser.parse(query), collector);
       }
       catch (ParseException e) {
       }
       Results results = new Results();
       results.totalHits = collector.getTotalHits();
       TopDocs topDocs = collector.topDocs();
       ScoreDoc docs[] = topDocs.scoreDocs;
       float maxScore = topDocs.getMaxScore();
       for (int i = 0; i < docs.length; i++) {
           Result result = new Result();
           result.score = docs[i].score / maxScore;
           result.doc = searcher.doc(docs[i].doc);
           results.results.add(result);
       }
       return results;

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