103 lines
4.2 KiB
Java
103 lines
4.2 KiB
Java
package it.cavallium.dbengine.lucene.searcher;
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import io.net5.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.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 AdaptiveMultiSearcher implements MultiSearcher {
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private static final OfficialSearcher officialSearcher = new OfficialSearcher();
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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(LLTempLMDBEnv env, boolean useLMDB, int maxInMemoryResultEntries) {
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sortedByScoreFull = useLMDB ? new SortedByScoreFullMultiSearcher(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> 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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if (transformer == LLSearchTransformer.NO_TRANSFORMATION) {
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return transformedCollectMulti(indexSearchersMono, 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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.transformedCollectMulti(indexSearchersMono, queryParams2, keyFieldName, LLSearchTransformer.NO_TRANSFORMATION)),
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true);
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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(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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// 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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return LLUtils.usingSendResource(indexSearchersMono, indexSearchers -> {
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if (queryParams.limitLong() == 0) {
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return count.collectMulti(indexSearchersMono, 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(indexSearchersMono, 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(indexSearchersMono, queryParams, keyFieldName, transformer);
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} else {
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return scoredPaged.collectMulti(indexSearchersMono, 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(indexSearchersMono, queryParams, keyFieldName, transformer);
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} else {
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return scoredPaged.collectMulti(indexSearchersMono, 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(indexSearchersMono, queryParams, keyFieldName, transformer);
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}
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}, true);
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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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