83 lines
3.1 KiB
Java
83 lines
3.1 KiB
Java
package it.cavallium.dbengine.lucene.searcher;
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import static it.cavallium.dbengine.database.LLUtils.mapList;
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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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import it.cavallium.dbengine.database.disk.LLIndexSearchers;
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import it.cavallium.dbengine.lucene.LuceneUtils;
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import it.cavallium.dbengine.utils.DBException;
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import java.io.IOException;
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import java.util.List;
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import java.util.function.Function;
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import java.util.stream.Stream;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import org.apache.lucene.index.QueryTimeout;
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import org.apache.lucene.index.QueryTimeoutImpl;
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import org.jetbrains.annotations.Nullable;
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public class CountMultiSearcher implements MultiSearcher {
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protected static final Logger LOG = LogManager.getLogger(CountMultiSearcher.class);
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@Override
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public LuceneSearchResult collectMulti(LLIndexSearchers indexSearchers,
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LocalQueryParams queryParams,
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@Nullable String keyFieldName,
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GlobalQueryRewrite transformer,
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Function<Stream<LLKeyScore>, Stream<LLKeyScore>> filterer) {
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if (transformer != GlobalQueryRewrite.NO_REWRITE) {
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return LuceneUtils.rewriteMulti(this, indexSearchers, queryParams, keyFieldName, transformer, filterer);
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}
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if (queryParams.isSorted() && queryParams.limitLong() > 0) {
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throw new UnsupportedOperationException(
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"Sorted queries are not supported by SimpleUnsortedUnscoredLuceneMultiSearcher");
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}
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if (queryParams.needsScores() && queryParams.limitLong() > 0) {
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throw new UnsupportedOperationException(
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"Scored queries are not supported by SimpleUnsortedUnscoredLuceneMultiSearcher");
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}
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var results = mapList(indexSearchers.llShards(),
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searcher -> this.collect(searcher, queryParams, keyFieldName, transformer, f -> filterer.apply(f).limit(0))
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);
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boolean exactTotalHitsCount = true;
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long totalHitsCountValue = 0;
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for (LuceneSearchResult 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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var totalHitsCount = new TotalHitsCount(totalHitsCountValue, exactTotalHitsCount);
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return new LuceneSearchResult(totalHitsCount, List.of());
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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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Function<Stream<LLKeyScore>, Stream<LLKeyScore>> filterer) {
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if (transformer != GlobalQueryRewrite.NO_REWRITE) {
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return LuceneUtils.rewrite(this, indexSearcher, queryParams, keyFieldName, transformer, filterer);
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}
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try {
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var is = indexSearcher.getIndexSearcher();
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is.setTimeout(new QueryTimeoutImpl(queryParams.timeout().toMillis()));
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var count = is.count(queryParams.query());
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return new LuceneSearchResult(TotalHitsCount.of(count, true), List.of());
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} catch (IOException e) {
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throw new DBException(e);
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}
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}
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@Override
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public String toString() {
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return "count";
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}
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}
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