2021-09-19 12:35:48 +02:00
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package it.cavallium.dbengine.lucene.searcher;
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import io.net5.buffer.api.Resource;
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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.client.query.current.data.TotalHitsCount;
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import it.cavallium.dbengine.database.LLKeyScore;
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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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2021-09-20 12:51:27 +02:00
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import it.cavallium.dbengine.database.disk.LLIndexSearchers;
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2021-09-19 12:35:48 +02:00
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import java.util.ArrayList;
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import java.util.Comparator;
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import java.util.List;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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public class SimpleUnsortedUnscoredLuceneMultiSearcher implements LuceneMultiSearcher {
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private final LuceneLocalSearcher localSearcher;
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public SimpleUnsortedUnscoredLuceneMultiSearcher(LuceneLocalSearcher localSearcher) {
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this.localSearcher = localSearcher;
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}
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@Override
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public Mono<Send<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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var indexSearchersResource = Mono
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2021-09-19 12:35:48 +02:00
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.fromRunnable(() -> {
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LLUtils.ensureBlocking();
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2021-09-21 02:01:02 +02:00
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if (queryParams.isSorted()) {
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2021-09-19 12:35:48 +02:00
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throw new UnsupportedOperationException("Sorted queries are not supported"
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+ " by SimpleUnsortedUnscoredLuceneMultiSearcher");
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}
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2021-09-21 02:01:02 +02:00
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if (queryParams.isScored()) {
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throw new UnsupportedOperationException("Scored queries are not supported"
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+ " by SimpleUnsortedUnscoredLuceneMultiSearcher");
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}
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})
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2021-09-20 12:51:27 +02:00
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.then(indexSearchersMono.map(Send::receive));
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2021-09-19 12:35:48 +02:00
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2021-09-20 12:51:27 +02:00
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return LLUtils.usingResource(indexSearchersResource,
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indexSearchers -> Flux.fromIterable(indexSearchers.shards())
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.flatMap(searcher -> localSearcher
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.collect(Mono.just(searcher.send()), queryParams, keyFieldName, transformer))
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.collectList()
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.map(results -> {
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List<LuceneSearchResult> resultsToDrop = new ArrayList<>(results.size());
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List<Flux<LLKeyScore>> resultsFluxes = new ArrayList<>(results.size());
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boolean exactTotalHitsCount = true;
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long totalHitsCountValue = 0;
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for (Send<LuceneSearchResult> resultToReceive : results) {
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LuceneSearchResult result = resultToReceive.receive();
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resultsToDrop.add(result);
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resultsFluxes.add(result.results());
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exactTotalHitsCount &= result.totalHitsCount().exact();
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totalHitsCountValue += result.totalHitsCount().value();
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}
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2021-09-19 12:35:48 +02:00
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2021-09-20 12:51:27 +02:00
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var totalHitsCount = new TotalHitsCount(totalHitsCountValue, exactTotalHitsCount);
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Flux<LLKeyScore> mergedFluxes = Flux.merge(resultsFluxes);
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return new LuceneSearchResult(totalHitsCount, mergedFluxes, d -> {
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for (LuceneSearchResult luceneSearchResult : resultsToDrop) {
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luceneSearchResult.close();
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}
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}).send();
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}),
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true
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);
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2021-09-19 12:35:48 +02:00
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}
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}
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