107 lines
4.4 KiB
Java
107 lines
4.4 KiB
Java
package it.cavallium.dbengine.lucene.searcher;
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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.database.LLUtils;
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import it.cavallium.dbengine.database.disk.LLIndexSearchers;
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import it.cavallium.dbengine.database.disk.LLTempHugePqEnv;
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import java.io.IOException;
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import org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Mono;
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import reactor.core.scheduler.Schedulers;
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public class AdaptiveMultiSearcher implements MultiSearcher {
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private static final StandardSearcher standardSearcher = new StandardSearcher();
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private static final MultiSearcher count = new CountMultiSearcher();
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private static final MultiSearcher scoredPaged = new ScoredPagedMultiSearcher();
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private static final MultiSearcher unsortedUnscoredContinuous = new UnsortedStreamingMultiSearcher();
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/**
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* Use in-memory collectors if the expected results count is lower or equal than this limit
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*/
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private final int maxInMemoryResultEntries;
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@Nullable
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private final SortedByScoreFullMultiSearcher sortedByScoreFull;
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@Nullable
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private final SortedScoredFullMultiSearcher sortedScoredFull;
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public AdaptiveMultiSearcher(LLTempHugePqEnv env, boolean useHugePq, int maxInMemoryResultEntries) {
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sortedByScoreFull = useHugePq ? new SortedByScoreFullMultiSearcher(env) : null;
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sortedScoredFull = useHugePq ? new SortedScoredFullMultiSearcher(env) : null;
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this.maxInMemoryResultEntries = maxInMemoryResultEntries;
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}
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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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@Nullable String keyFieldName,
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GlobalQueryRewrite transformer) {
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return indexSearchersMono.flatMap(indexSearchers -> {
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if (transformer == NO_REWRITE) {
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return transformedCollectMulti(indexSearchers, queryParams, keyFieldName, transformer);
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} else {
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return Mono.fromCallable(() -> transformer.rewrite(indexSearchers, queryParams))
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.subscribeOn(uninterruptibleScheduler(Schedulers.boundedElastic()))
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.flatMap(queryParams2 -> transformedCollectMulti(indexSearchers, queryParams2, keyFieldName, NO_REWRITE));
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}
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});
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}
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// Remember to change also AdaptiveLocalSearcher
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public Mono<LuceneSearchResult> transformedCollectMulti(LLIndexSearchers indexSearchers,
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LocalQueryParams queryParams,
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@Nullable String keyFieldName,
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GlobalQueryRewrite transformer) {
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// offset + limit
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long realLimit = queryParams.offsetLong() + queryParams.limitLong();
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long maxAllowedInMemoryLimit
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= Math.max(maxInMemoryResultEntries, (long) queryParams.pageLimits().getPageLimit(0));
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if (queryParams.limitLong() == 0) {
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return count.collectMulti(Mono.just(indexSearchers), queryParams, keyFieldName, transformer);
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} else if (realLimit <= maxInMemoryResultEntries) {
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return standardSearcher.collectMulti(Mono.just(indexSearchers), queryParams, keyFieldName, transformer);
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} else if (queryParams.isSorted()) {
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if (realLimit <= maxAllowedInMemoryLimit) {
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return scoredPaged.collectMulti(Mono.just(indexSearchers), queryParams, keyFieldName, transformer);
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} else {
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if (queryParams.isSortedByScore()) {
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if (queryParams.limitLong() < maxInMemoryResultEntries) {
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throw new UnsupportedOperationException("Allowed limit is " + maxInMemoryResultEntries + " or greater");
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}
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if (sortedByScoreFull != null) {
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return sortedByScoreFull.collectMulti(Mono.just(indexSearchers), queryParams, keyFieldName, transformer);
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} else {
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return scoredPaged.collectMulti(Mono.just(indexSearchers), queryParams, keyFieldName, transformer);
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}
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} else {
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if (queryParams.limitLong() < maxInMemoryResultEntries) {
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throw new UnsupportedOperationException("Allowed limit is " + maxInMemoryResultEntries + " or greater");
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}
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if (sortedScoredFull != null) {
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return sortedScoredFull.collectMulti(Mono.just(indexSearchers), queryParams, keyFieldName, transformer);
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} else {
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return scoredPaged.collectMulti(Mono.just(indexSearchers), queryParams, keyFieldName, transformer);
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}
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}
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}
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} else {
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// Run large/unbounded searches using the continuous multi searcher
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return unsortedUnscoredContinuous.collectMulti(Mono.just(indexSearchers), queryParams, keyFieldName, transformer);
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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 "adaptive local";
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}
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}
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