86 lines
2.9 KiB
Java
86 lines
2.9 KiB
Java
package it.cavallium.dbengine.lucene.searcher;
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import static java.util.Objects.requireNonNull;
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import io.net5.buffer.api.Send;
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import it.cavallium.dbengine.client.query.current.data.TotalHitsCount;
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import it.cavallium.dbengine.database.LLKeyScore;
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import it.cavallium.dbengine.database.LLUtils;
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import it.cavallium.dbengine.database.disk.LLIndexSearchers;
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import it.cavallium.dbengine.lucene.LuceneUtils;
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import it.cavallium.dbengine.lucene.searcher.LLSearchTransformer.TransformerInput;
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import java.util.List;
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import org.apache.lucene.search.IndexSearcher;
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import org.apache.lucene.search.ScoreDoc;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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public class UnsortedStreamingMultiSearcher implements MultiSearcher {
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@Override
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public Mono<LuceneSearchResult> collectMulti(Mono<Send<LLIndexSearchers>> indexSearchersMono,
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LocalQueryParams queryParams,
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String keyFieldName,
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LLSearchTransformer transformer) {
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return LLUtils.usingSendResource(indexSearchersMono, indexSearchers -> {
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Mono<LocalQueryParams> queryParamsMono;
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if (transformer == LLSearchTransformer.NO_TRANSFORMATION) {
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queryParamsMono = Mono.just(queryParams);
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} else {
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queryParamsMono = transformer.transform(Mono
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.fromCallable(() -> new TransformerInput(indexSearchers, queryParams)));
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}
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return queryParamsMono.map(queryParams2 -> {
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var localQueryParams = getLocalQueryParams(queryParams2);
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if (queryParams2.isSorted() && queryParams2.limitLong() > 0) {
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throw new UnsupportedOperationException("Sorted queries are not supported"
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+ " by UnsortedContinuousLuceneMultiSearcher");
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}
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var shards = indexSearchers.shards();
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Flux<ScoreDoc> scoreDocsFlux = getScoreDocs(localQueryParams, shards);
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Flux<LLKeyScore> resultsFlux = LuceneUtils.convertHits(scoreDocsFlux, shards, keyFieldName, false);
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var totalHitsCount = new TotalHitsCount(0, false);
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Flux<LLKeyScore> mergedFluxes = resultsFlux
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.skip(queryParams2.offsetLong())
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.take(queryParams2.limitLong(), true);
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return new LuceneSearchResult(totalHitsCount, mergedFluxes, indexSearchers::close);
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});
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}, false);
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}
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private Flux<ScoreDoc> getScoreDocs(LocalQueryParams localQueryParams, List<IndexSearcher> shards) {
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return Flux
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.fromIterable(shards)
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.index()
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.flatMap(tuple -> {
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var shardIndex = (int) (long) tuple.getT1();
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var shard = tuple.getT2();
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return LuceneGenerator.reactive(shard, localQueryParams, shardIndex);
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});
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}
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private LocalQueryParams getLocalQueryParams(LocalQueryParams queryParams) {
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return new LocalQueryParams(queryParams.query(),
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0L,
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queryParams.offsetLong() + queryParams.limitLong(),
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queryParams.pageLimits(),
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queryParams.minCompetitiveScore(),
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queryParams.sort(),
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queryParams.computePreciseHitsCount(),
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queryParams.timeout()
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);
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}
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@Override
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public String getName() {
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return "unsorted streaming multi";
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}
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}
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