2021-11-09 00:05:26 +01:00
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package it.cavallium.dbengine.lucene.searcher;
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2021-12-16 16:14:44 +01:00
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import static it.cavallium.dbengine.client.UninterruptibleScheduler.uninterruptibleScheduler;
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2022-06-14 17:46:49 +02:00
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import static it.cavallium.dbengine.database.LLUtils.singleOrClose;
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2021-12-16 16:14:44 +01:00
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2022-03-16 13:47:56 +01:00
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import io.netty5.buffer.api.Send;
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2021-11-09 00:05:26 +01:00
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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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2022-06-14 18:05:26 +02:00
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import it.cavallium.dbengine.utils.SimpleResource;
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2022-01-28 21:12:10 +01:00
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import java.io.IOException;
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2021-11-09 00:05:26 +01:00
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import java.util.ArrayList;
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import java.util.List;
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2022-06-14 13:10:38 +02:00
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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2022-02-26 03:28:20 +01:00
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import org.jetbrains.annotations.Nullable;
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2021-11-09 00:05:26 +01:00
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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 CountMultiSearcher implements MultiSearcher {
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2022-06-14 13:10:38 +02:00
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protected static final Logger LOG = LogManager.getLogger(CountMultiSearcher.class);
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@Override
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public Mono<LuceneSearchResult> collectMulti(Mono<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 singleOrClose(indexSearchersMono, indexSearchers -> {
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Mono<LocalQueryParams> queryParamsMono;
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if (transformer == GlobalQueryRewrite.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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2021-11-09 00:05:26 +01:00
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2022-06-14 13:10:38 +02:00
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return queryParamsMono.flatMap(queryParams2 -> {
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var localQueryParams = getLocalQueryParams(queryParams2);
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return Mono
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.fromRunnable(() -> {
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if (queryParams2.isSorted() && queryParams2.limitLong() > 0) {
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throw new UnsupportedOperationException(
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"Sorted queries are not supported by SimpleUnsortedUnscoredLuceneMultiSearcher");
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}
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if (queryParams2.needsScores() && queryParams2.limitLong() > 0) {
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throw new UnsupportedOperationException(
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"Scored queries are not supported by SimpleUnsortedUnscoredLuceneMultiSearcher");
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}
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})
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.thenMany(Flux.fromIterable(indexSearchers.llShards()))
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.flatMap(searcher -> this.collect(Mono.just(searcher), localQueryParams, keyFieldName, transformer))
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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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2022-06-14 13:10:38 +02:00
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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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resultsToDrop.forEach(SimpleResource::close);
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try {
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indexSearchers.close();
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} catch (IOException e) {
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LOG.error("Can't close index searchers", e);
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}
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});
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});
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});
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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 Mono<LuceneSearchResult> collect(Mono<LLIndexSearcher> indexSearcherMono,
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LocalQueryParams queryParams,
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2022-02-26 03:28:20 +01:00
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@Nullable String keyFieldName,
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2022-01-28 21:12:10 +01:00
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GlobalQueryRewrite transformer) {
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2022-06-14 17:46:49 +02:00
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return singleOrClose(indexSearcherMono, indexSearcher -> {
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Mono<LocalQueryParams> queryParamsMono;
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if (transformer == GlobalQueryRewrite.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(LLIndexSearchers.unsharded(indexSearcher), queryParams))
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.subscribeOn(uninterruptibleScheduler(Schedulers.boundedElastic()));
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}
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2021-12-17 16:24:18 +01:00
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2022-06-14 13:10:38 +02:00
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return queryParamsMono
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.flatMap(queryParams2 -> Mono.fromCallable(() -> {
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LLUtils.ensureBlocking();
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return (long) indexSearcher.getIndexSearcher().count(queryParams2.query());
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}).subscribeOn(uninterruptibleScheduler(Schedulers.boundedElastic())))
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.publishOn(Schedulers.parallel())
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.transform(TimeoutUtil.timeoutMono(queryParams.timeout()))
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.map(count -> new LuceneSearchResult(TotalHitsCount.of(count, true), Flux.empty(), () -> {
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try {
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indexSearcher.close();
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} catch (IOException e) {
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LOG.error("Can't close index searchers", e);
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}
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}));
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});
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2021-11-09 00:05:26 +01:00
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}
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@Override
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public String getName() {
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return "count";
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}
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}
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