81 lines
3.1 KiB
Java
81 lines
3.1 KiB
Java
package it.cavallium.dbengine.lucene.searcher;
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import static it.cavallium.dbengine.lucene.searcher.GlobalQueryRewrite.NO_REWRITE;
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import it.cavallium.dbengine.database.disk.LLIndexSearcher;
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import it.cavallium.dbengine.lucene.LuceneUtils;
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import java.io.IOException;
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import org.jetbrains.annotations.Nullable;
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public class AdaptiveLocalSearcher implements LocalSearcher {
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private static final StandardSearcher standardSearcher = new StandardSearcher();
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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 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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public AdaptiveLocalSearcher(int maxInMemoryResultEntries) {
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this.maxInMemoryResultEntries = maxInMemoryResultEntries;
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}
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@Override
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public LuceneSearchResult collect(LLIndexSearcher indexSearcher,
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LocalQueryParams queryParams,
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@Nullable String keyFieldName,
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GlobalQueryRewrite transformer) {
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if (transformer != NO_REWRITE) {
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return LuceneUtils.rewrite(this, indexSearcher, queryParams, keyFieldName, transformer);
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}
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return transformedCollect(indexSearcher, queryParams, keyFieldName, transformer);
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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 LuceneSearchResult transformedCollect(LLIndexSearcher indexSearcher,
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LocalQueryParams queryParams,
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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 countSearcher.collect(indexSearcher, queryParams, keyFieldName, transformer);
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} else if (realLimit <= maxInMemoryResultEntries) {
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return standardSearcher.collect(indexSearcher, queryParams, keyFieldName, transformer);
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} else if (queryParams.isSorted()) {
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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.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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return scoredPaged.collect(indexSearcher, queryParams, keyFieldName, transformer);
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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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return scoredPaged.collect(indexSearcher, queryParams, keyFieldName, transformer);
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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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