129 lines
4.8 KiB
Java
129 lines
4.8 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.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.LLIndexSearchers;
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import it.cavallium.dbengine.lucene.LuceneUtils;
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import it.cavallium.dbengine.lucene.collector.ReactiveCollectorManager;
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import it.cavallium.dbengine.lucene.searcher.LLSearchTransformer.TransformerInput;
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import java.util.Queue;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.locks.LockSupport;
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import java.util.function.Supplier;
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import org.apache.lucene.search.IndexSearcher;
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import org.apache.lucene.search.ScoreDoc;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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import reactor.core.publisher.Sinks;
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import reactor.core.publisher.Sinks.EmitResult;
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import reactor.core.publisher.Sinks.Many;
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import reactor.core.scheduler.Scheduler;
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import reactor.core.scheduler.Schedulers;
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import reactor.util.concurrent.Queues;
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public class UnsortedUnscoredStreamingMultiSearcher implements MultiSearcher {
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private static final Scheduler UNSCORED_UNSORTED_EXECUTOR = Schedulers.newBoundedElastic(
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Schedulers.DEFAULT_BOUNDED_ELASTIC_SIZE,
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Schedulers.DEFAULT_BOUNDED_ELASTIC_QUEUESIZE,
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"UnscoredUnsortedExecutor"
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);
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private static final Supplier<Queue<ScoreDoc>> QUEUE_SUPPLIER = Queues.get(1024);
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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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return LLUtils.usingSendResource(indexSearchersMono, indexSearchers -> {
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Mono<LocalQueryParams> queryParamsMono;
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if (transformer == LLSearchTransformer.NO_TRANSFORMATION) {
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queryParamsMono = Mono.just(queryParams);
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} else {
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queryParamsMono = transformer.transform(Mono
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.fromCallable(() -> new TransformerInput(indexSearchers, queryParams)));
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}
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return queryParamsMono
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.flatMap(queryParams2 -> {
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var localQueryParams = getLocalQueryParams(queryParams2);
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if (queryParams2.isSorted() && queryParams2.limitLong() > 0) {
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return Mono.error(new UnsupportedOperationException("Sorted queries are not supported"
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+ " by UnsortedUnscoredContinuousLuceneMultiSearcher"));
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}
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if (queryParams2.needsScores() && queryParams2.limitLong() > 0) {
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return Mono.error(new UnsupportedOperationException("Scored queries are not supported"
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+ " by UnsortedUnscoredContinuousLuceneMultiSearcher"));
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}
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return Mono.fromCallable(() -> {
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LLUtils.ensureBlocking();
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Many<ScoreDoc> scoreDocsSink = Sinks.many().unicast().onBackpressureBuffer(QUEUE_SUPPLIER.get());
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var cm = new ReactiveCollectorManager(scoreDocsSink);
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AtomicInteger runningTasks = new AtomicInteger(0);
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var shards = indexSearchers.shards();
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runningTasks.addAndGet(shards.size());
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int mutableShardIndex = 0;
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for (IndexSearcher shard : shards) {
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int shardIndex = mutableShardIndex++;
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UNSCORED_UNSORTED_EXECUTOR.schedule(() -> {
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try {
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var collector = cm.newCollector();
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assert queryParams.complete() == collector.scoreMode().isExhaustive();
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queryParams.getScoreModeOptional().ifPresent(scoreMode -> {
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assert scoreMode == collector.scoreMode();
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});
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collector.setShardIndex(shardIndex);
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shard.search(localQueryParams.query(), collector);
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} catch (Throwable e) {
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while (scoreDocsSink.tryEmitError(e) == EmitResult.FAIL_NON_SERIALIZED) {
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LockSupport.parkNanos(10);
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}
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} finally {
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if (runningTasks.decrementAndGet() <= 0) {
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while (scoreDocsSink.tryEmitComplete() == EmitResult.FAIL_NON_SERIALIZED) {
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LockSupport.parkNanos(10);
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}
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}
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}
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});
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}
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Flux<LLKeyScore> resultsFlux = LuceneUtils.convertHits(scoreDocsSink.asFlux(), shards, keyFieldName, false);
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var totalHitsCount = new TotalHitsCount(0, false);
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Flux<LLKeyScore> mergedFluxes = resultsFlux
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.skip(queryParams2.offsetLong())
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.take(queryParams2.limitLong(), true);
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return new LuceneSearchResult(totalHitsCount, mergedFluxes, indexSearchers::close).send();
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});
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});
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}, false);
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}
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private LocalQueryParams getLocalQueryParams(LocalQueryParams queryParams) {
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return new LocalQueryParams(queryParams.query(),
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0L,
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queryParams.offsetLong() + queryParams.limitLong(),
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queryParams.pageLimits(),
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queryParams.minCompetitiveScore(),
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queryParams.sort(),
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queryParams.complete()
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);
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}
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@Override
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public String getName() {
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return "unsorted unscored streaming multi";
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}
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}
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