2021-07-06 00:30:14 +02:00
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package it.cavallium.dbengine.lucene.searcher;
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2022-01-28 21:12:10 +01:00
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import static it.cavallium.dbengine.lucene.searcher.GlobalQueryRewrite.NO_REWRITE;
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2021-09-18 18:34:21 +02:00
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import it.cavallium.dbengine.database.disk.LLIndexSearcher;
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2022-07-02 11:44:13 +02:00
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import it.cavallium.dbengine.lucene.LuceneUtils;
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2023-02-09 23:34:25 +01:00
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import java.io.IOException;
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2021-12-12 16:41:49 +01:00
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import org.jetbrains.annotations.Nullable;
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2021-07-06 00:30:14 +02:00
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2021-10-13 12:25:32 +02:00
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public class AdaptiveLocalSearcher implements LocalSearcher {
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2021-07-06 00:30:14 +02:00
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2022-03-15 12:36:33 +01:00
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private static final StandardSearcher standardSearcher = new StandardSearcher();
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2021-12-12 16:41:49 +01:00
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2021-12-12 18:52:50 +01:00
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private static final LocalSearcher scoredPaged = new PagedLocalSearcher();
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2021-07-06 00:30:14 +02:00
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2021-11-09 00:05:26 +01:00
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private static final LocalSearcher countSearcher = new CountMultiSearcher();
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2021-07-06 01:30:37 +02:00
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2021-12-23 02:13:51 +01:00
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private static final MultiSearcher unsortedUnscoredContinuous = new UnsortedStreamingMultiSearcher();
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2021-11-21 12:31:23 +01:00
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2021-12-12 23:40:30 +01:00
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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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2023-02-09 23:34:25 +01:00
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public AdaptiveLocalSearcher(int maxInMemoryResultEntries) {
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2021-12-12 23:40:30 +01:00
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this.maxInMemoryResultEntries = maxInMemoryResultEntries;
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2021-11-21 12:31:23 +01:00
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}
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2021-07-06 00:30:14 +02:00
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@Override
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2023-02-09 23:34:25 +01:00
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public LuceneSearchResult collect(LLIndexSearcher indexSearcher,
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2021-07-06 01:30:37 +02:00
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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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2022-07-02 11:44:13 +02:00
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if (transformer != NO_REWRITE) {
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2023-02-22 16:59:35 +01:00
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return LuceneUtils.rewrite(this, indexSearcher, queryParams, keyFieldName, transformer);
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2022-07-02 11:44:13 +02:00
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}
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2023-02-09 23:34:25 +01:00
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return transformedCollect(indexSearcher, queryParams, keyFieldName, transformer);
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2021-10-08 11:50:28 +02:00
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}
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2021-10-13 00:23:56 +02:00
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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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2021-11-21 12:31:23 +01:00
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// Remember to change also AdaptiveMultiSearcher
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2023-02-09 23:34:25 +01:00
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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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2021-11-21 12:31:23 +01:00
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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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2021-11-21 12:31:23 +01:00
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2023-02-09 23:34:25 +01:00
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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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2022-08-12 02:08:15 +02:00
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} else if (queryParams.isSorted()) {
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2023-02-09 23:34:25 +01:00
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if (realLimit <= maxAllowedInMemoryLimit) {
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return scoredPaged.collect(indexSearcher, queryParams, keyFieldName, transformer);
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2021-11-21 12:31:23 +01:00
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} else {
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2021-12-23 02:13:51 +01:00
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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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2021-11-21 12:31:23 +01:00
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}
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2023-02-09 23:34:25 +01:00
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return scoredPaged.collect(indexSearcher, queryParams, keyFieldName, transformer);
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2021-11-21 12:31:23 +01:00
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} else {
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2023-02-09 23:34:25 +01:00
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if (queryParams.limitLong() < maxInMemoryResultEntries) {
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2021-12-12 23:40:30 +01:00
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throw new UnsupportedOperationException("Allowed limit is " + maxInMemoryResultEntries + " or greater");
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2021-11-21 12:31:23 +01:00
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}
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2023-02-09 23:34:25 +01:00
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return scoredPaged.collect(indexSearcher, queryParams, keyFieldName, transformer);
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2021-11-21 12:31:23 +01:00
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}
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}
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2021-07-06 01:30:37 +02:00
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} else {
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2021-11-21 12:31:23 +01:00
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// Run large/unbounded searches using the continuous multi searcher
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2023-02-09 23:34:25 +01:00
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return unsortedUnscoredContinuous.collect(indexSearcher, queryParams, keyFieldName, transformer);
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2021-07-06 01:30:37 +02:00
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}
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2021-07-06 00:30:14 +02:00
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}
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}
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