74 lines
2.7 KiB
Java
74 lines
2.7 KiB
Java
package it.cavallium.dbengine.lucene.searcher;
|
|
|
|
import static com.google.common.collect.Streams.mapWithIndex;
|
|
import static it.cavallium.dbengine.utils.StreamUtils.toList;
|
|
|
|
import it.cavallium.dbengine.client.query.current.data.TotalHitsCount;
|
|
import it.cavallium.dbengine.database.LLKeyScore;
|
|
import it.cavallium.dbengine.database.disk.LLIndexSearchers;
|
|
import it.cavallium.dbengine.lucene.LuceneCloseable;
|
|
import it.cavallium.dbengine.lucene.LuceneUtils;
|
|
import java.io.IOException;
|
|
import java.util.List;
|
|
import java.util.function.Function;
|
|
import java.util.stream.Stream;
|
|
import org.apache.logging.log4j.LogManager;
|
|
import org.apache.logging.log4j.Logger;
|
|
import org.apache.lucene.search.IndexSearcher;
|
|
import org.apache.lucene.search.ScoreDoc;
|
|
import org.jetbrains.annotations.Nullable;
|
|
|
|
public class UnsortedStreamingMultiSearcher implements MultiSearcher {
|
|
|
|
|
|
protected static final Logger LOG = LogManager.getLogger(UnsortedStreamingMultiSearcher.class);
|
|
|
|
@Override
|
|
public LuceneSearchResult collectMulti(LLIndexSearchers indexSearchers,
|
|
LocalQueryParams queryParams,
|
|
@Nullable String keyFieldName,
|
|
GlobalQueryRewrite transformer,
|
|
Function<Stream<LLKeyScore>, Stream<LLKeyScore>> filterer) {
|
|
if (transformer != GlobalQueryRewrite.NO_REWRITE) {
|
|
return LuceneUtils.rewriteMulti(this, indexSearchers, queryParams, keyFieldName, transformer, filterer);
|
|
}
|
|
if (queryParams.isSorted() && queryParams.limitLong() > 0) {
|
|
throw new UnsupportedOperationException("Sorted queries are not supported" + " by UnsortedContinuousLuceneMultiSearcher");
|
|
}
|
|
var localQueryParams = getLocalQueryParams(queryParams);
|
|
|
|
var shards = indexSearchers.shards();
|
|
|
|
Stream<ScoreDoc> scoreDocsFlux = getScoreDocs(localQueryParams, shards);
|
|
|
|
Stream<LLKeyScore> resultsFlux = LuceneUtils.convertHits(scoreDocsFlux, shards, keyFieldName);
|
|
|
|
var totalHitsCount = new TotalHitsCount(0, false);
|
|
Stream<LLKeyScore> mergedFluxes = resultsFlux.skip(queryParams.offsetLong()).limit(queryParams.limitLong());
|
|
|
|
return new LuceneSearchResult(totalHitsCount, toList(filterer.apply(mergedFluxes)));
|
|
}
|
|
|
|
private Stream<ScoreDoc> getScoreDocs(LocalQueryParams localQueryParams, List<IndexSearcher> shards) {
|
|
return mapWithIndex(shards.stream(),
|
|
(shard, shardIndex) -> LuceneGenerator.reactive(shard, localQueryParams, (int) shardIndex))
|
|
.flatMap(Function.identity());
|
|
}
|
|
|
|
private LocalQueryParams getLocalQueryParams(LocalQueryParams queryParams) {
|
|
return new LocalQueryParams(queryParams.query(),
|
|
0L,
|
|
queryParams.offsetLong() + queryParams.limitLong(),
|
|
queryParams.pageLimits(),
|
|
queryParams.sort(),
|
|
queryParams.computePreciseHitsCount(),
|
|
queryParams.timeout()
|
|
);
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "unsorted streaming multi";
|
|
}
|
|
}
|