107 lines
4.3 KiB
Java
107 lines
4.3 KiB
Java
package it.cavallium.dbengine.lucene.searcher;
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import io.net5.buffer.api.Send;
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import io.net5.buffer.api.internal.ResourceSupport;
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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.database.disk.LLTempLMDBEnv;
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import it.cavallium.dbengine.lucene.searcher.LLSearchTransformer.TransformerInput;
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import org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Mono;
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public class AdaptiveLocalSearcher implements LocalSearcher {
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private static final OfficialSearcher officialSearcher = new OfficialSearcher();
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private static final LocalSearcher scoredPaged = new PagedLocalSearcher();
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private static final LocalSearcher countSearcher = new CountMultiSearcher();
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private static final MultiSearcher unsortedUnscoredContinuous = new UnsortedUnscoredStreamingMultiSearcher();
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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 UnsortedScoredFullMultiSearcher unsortedScoredFull;
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@Nullable
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private final SortedScoredFullMultiSearcher sortedScoredFull;
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public AdaptiveLocalSearcher(LLTempLMDBEnv env, boolean useLMDB, int maxInMemoryResultEntries) {
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unsortedScoredFull = useLMDB ? new UnsortedScoredFullMultiSearcher(env) : null;
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sortedScoredFull = useLMDB ? 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> collect(Mono<Send<LLIndexSearcher>> indexSearcher,
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LocalQueryParams queryParams,
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String keyFieldName,
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LLSearchTransformer transformer) {
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Mono<Send<LLIndexSearchers>> indexSearchersMono = indexSearcher
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.map(LLIndexSearchers::unsharded)
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.map(ResourceSupport::send);
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if (transformer == LLSearchTransformer.NO_TRANSFORMATION) {
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return transformedCollect(indexSearcher, queryParams, keyFieldName, transformer);
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} else {
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return LLUtils.usingSendResource(indexSearchersMono, indexSearchers -> transformer
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.transform(Mono.fromCallable(() -> new TransformerInput(indexSearchers, queryParams)))
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.flatMap(queryParams2 -> this
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.transformedCollect(indexSearcher, queryParams2, keyFieldName, LLSearchTransformer.NO_TRANSFORMATION)),
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true);
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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 "adaptivelocal";
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}
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// Remember to change also AdaptiveMultiSearcher
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public Mono<LuceneSearchResult> transformedCollect(Mono<Send<LLIndexSearcher>> indexSearcher,
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LocalQueryParams queryParams,
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String keyFieldName,
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LLSearchTransformer 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 countSearcher.collect(indexSearcher, queryParams, keyFieldName, transformer);
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} else if (queryParams.isSorted() || queryParams.needsScores()) {
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if (realLimit <= maxAllowedInMemoryLimit) {
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return scoredPaged.collect(indexSearcher, queryParams, keyFieldName, transformer);
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} else {
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if ((queryParams.isSorted() && !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 (sortedScoredFull != null) {
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return sortedScoredFull.collect(indexSearcher, queryParams, keyFieldName, transformer);
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} else {
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return scoredPaged.collect(indexSearcher, 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 (unsortedScoredFull != null) {
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return unsortedScoredFull.collect(indexSearcher, queryParams, keyFieldName, transformer);
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} else {
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return scoredPaged.collect(indexSearcher, 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.collect(indexSearcher, queryParams, keyFieldName, transformer);
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}
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}
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}
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