120 lines
4.4 KiB
Java
120 lines
4.4 KiB
Java
package it.cavallium.dbengine;
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import static it.cavallium.dbengine.client.UninterruptibleScheduler.uninterruptibleScheduler;
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import static it.cavallium.dbengine.lucene.searcher.GlobalQueryRewrite.NO_REWRITE;
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import io.netty5.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.LLIndexSearcher;
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import it.cavallium.dbengine.database.disk.LLIndexSearchers;
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import it.cavallium.dbengine.lucene.searcher.GlobalQueryRewrite;
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import it.cavallium.dbengine.lucene.searcher.LocalQueryParams;
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import it.cavallium.dbengine.lucene.searcher.LocalSearcher;
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import it.cavallium.dbengine.lucene.searcher.LuceneSearchResult;
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import it.cavallium.dbengine.lucene.searcher.MultiSearcher;
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import java.util.ArrayList;
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import java.util.List;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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import reactor.core.scheduler.Schedulers;
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public class UnsortedUnscoredSimpleMultiSearcher implements MultiSearcher {
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private final LocalSearcher localSearcher;
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public UnsortedUnscoredSimpleMultiSearcher(LocalSearcher localSearcher) {
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this.localSearcher = localSearcher;
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}
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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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GlobalQueryRewrite transformer) {
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return LLUtils.usingSendResource(indexSearchersMono,
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indexSearchers -> {
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Mono<LocalQueryParams> queryParamsMono;
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if (transformer == NO_REWRITE) {
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queryParamsMono = Mono.just(queryParams);
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} else {
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queryParamsMono = Mono
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.fromCallable(() -> transformer.rewrite(indexSearchers, queryParams))
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.subscribeOn(uninterruptibleScheduler(Schedulers.boundedElastic()));
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}
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return queryParamsMono.flatMap(queryParams2 -> {
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var localQueryParams = getLocalQueryParams(queryParams2);
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return Flux
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.fromIterable(indexSearchers.shards())
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.flatMap(searcher -> {
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var llSearcher = Mono.fromCallable(() -> new LLIndexSearcher(searcher, false, null).send());
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return localSearcher.collect(llSearcher, localQueryParams, keyFieldName, transformer);
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})
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.collectList()
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.map(results -> {
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List<LuceneSearchResult> resultsToDrop = new ArrayList<>(results.size());
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List<Flux<LLKeyScore>> resultsFluxes = new ArrayList<>(results.size());
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boolean exactTotalHitsCount = true;
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long totalHitsCountValue = 0;
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for (LuceneSearchResult result : results) {
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resultsToDrop.add(result);
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resultsFluxes.add(result.results());
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exactTotalHitsCount &= result.totalHitsCount().exact();
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totalHitsCountValue += result.totalHitsCount().value();
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}
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var totalHitsCount = new TotalHitsCount(totalHitsCountValue, exactTotalHitsCount);
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Flux<LLKeyScore> mergedFluxes = Flux
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.merge(resultsFluxes)
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.skip(queryParams2.offsetLong())
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.take(queryParams2.limitLong(), true);
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return new LuceneSearchResult(totalHitsCount, mergedFluxes, () -> {
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for (LuceneSearchResult luceneSearchResult : resultsToDrop) {
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if (luceneSearchResult.isAccessible()) {
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luceneSearchResult.close();
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}
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}
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if (indexSearchers.isAccessible()) {
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indexSearchers.close();
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}
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});
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})
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.doFirst(() -> {
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LLUtils.ensureBlocking();
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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 SimpleUnsortedUnscoredLuceneMultiSearcher");
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}
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if (queryParams2.needsScores() && queryParams2.limitLong() > 0) {
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throw new UnsupportedOperationException("Scored queries are not supported"
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+ " by SimpleUnsortedUnscoredLuceneMultiSearcher");
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}
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});
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}
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);
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},
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false
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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.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 unscored simple multi";
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}
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}
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