222 lines
7.0 KiB
Java
222 lines
7.0 KiB
Java
package it.cavallium.dbengine.client;
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import it.cavallium.dbengine.client.query.ClientQueryParams;
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import it.cavallium.dbengine.client.query.current.data.Query;
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import it.cavallium.dbengine.client.query.current.data.QueryParams;
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import it.cavallium.dbengine.database.LLLuceneIndex;
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import it.cavallium.dbengine.database.LLScoreMode;
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import it.cavallium.dbengine.database.LLSearchResult;
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import it.cavallium.dbengine.database.LLSearchResultShard;
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import it.cavallium.dbengine.database.LLSnapshot;
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import it.cavallium.dbengine.database.LLTerm;
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import it.cavallium.dbengine.database.collections.Joiner.ValueGetter;
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import it.cavallium.dbengine.lucene.LuceneUtils;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Set;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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import reactor.util.function.Tuple2;
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public class LuceneIndexImpl<T, U> implements LuceneIndex<T, U> {
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private final LLLuceneIndex luceneIndex;
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private final Indicizer<T,U> indicizer;
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public LuceneIndexImpl(LLLuceneIndex luceneIndex, Indicizer<T, U> indicizer) {
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this.luceneIndex = luceneIndex;
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this.indicizer = indicizer;
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}
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private LLSnapshot resolveSnapshot(CompositeSnapshot snapshot) {
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if (snapshot == null) {
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return null;
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} else {
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return snapshot.getSnapshot(luceneIndex);
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}
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}
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@Override
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public Mono<Void> addDocument(T key, U value) {
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return indicizer
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.toDocument(key, value)
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.flatMap(doc -> luceneIndex.addDocument(indicizer.toIndex(key), doc));
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}
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@Override
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public Mono<Void> addDocuments(Flux<Entry<T, U>> entries) {
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return luceneIndex
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.addDocuments(entries
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.flatMap(entry -> indicizer
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.toDocument(entry.getKey(), entry.getValue())
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.map(doc -> Map.entry(indicizer.toIndex(entry.getKey()), doc)))
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);
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}
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@Override
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public Mono<Void> deleteDocument(T key) {
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LLTerm id = indicizer.toIndex(key);
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return luceneIndex.deleteDocument(id);
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}
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@Override
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public Mono<Void> updateDocument(T key, @NotNull U value) {
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return indicizer
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.toDocument(key, value)
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.flatMap(doc -> luceneIndex.updateDocument(indicizer.toIndex(key), doc));
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}
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@Override
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public Mono<Void> updateDocuments(Flux<Entry<T, U>> entries) {
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return luceneIndex
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.updateDocuments(entries
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.flatMap(entry -> indicizer
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.toDocument(entry.getKey(), entry.getValue())
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.map(doc -> Map.entry(indicizer.toIndex(entry.getKey()), doc)))
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.collectMap(Entry::getKey, Entry::getValue)
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);
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}
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@Override
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public Mono<Void> deleteAll() {
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return luceneIndex.deleteAll();
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}
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private Mono<SearchResultKeys<T>> transformLuceneResult(LLSearchResultShard llSearchResult) {
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return Mono.just(new SearchResultKeys<>(llSearchResult.results()
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.map(signal -> new SearchResultKey<>(signal.key().map(indicizer::getKey), signal.score())),
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llSearchResult.totalHitsCount(),
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llSearchResult.release()
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));
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}
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private <V> Mono<SearchResult<T, U>> transformLuceneResultWithValues(LLSearchResultShard llSearchResult,
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ValueGetter<T, U> valueGetter) {
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return Mono.just(new SearchResult<>(llSearchResult.results().map(signal -> {
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var key = signal.key().map(indicizer::getKey);
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return new SearchResultItem<>(key, key.flatMap(valueGetter::get), signal.score());
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}), llSearchResult.totalHitsCount(), llSearchResult.release()));
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}
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/**
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*
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* @param queryParams the limit is valid for each lucene instance.
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* If you have 15 instances, the number of elements returned
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* can be at most <code>limit * 15</code>
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* @return the collection has one or more flux
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*/
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@Override
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public <V> Mono<SearchResultKeys<T>> moreLikeThis(ClientQueryParams<SearchResultKey<T>> queryParams,
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T key,
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U mltDocumentValue) {
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Flux<Tuple2<String, Set<String>>> mltDocumentFields
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= indicizer.getMoreLikeThisDocumentFields(key, mltDocumentValue);
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return luceneIndex
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.moreLikeThis(resolveSnapshot(queryParams.snapshot()), queryParams.toQueryParams(), indicizer.getKeyFieldName(), mltDocumentFields)
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.flatMap(this::transformLuceneResult);
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}
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/**
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*
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* @param queryParams the limit is valid for each lucene instance.
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* If you have 15 instances, the number of elements returned
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* can be at most <code>limit * 15</code>
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* @return the collection has one or more flux
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*/
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@Override
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public <V> Mono<SearchResult<T, U>> moreLikeThisWithValues(ClientQueryParams<SearchResultItem<T, U>> queryParams,
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T key,
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U mltDocumentValue,
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ValueGetter<T, U> valueGetter) {
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Flux<Tuple2<String, Set<String>>> mltDocumentFields
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= indicizer.getMoreLikeThisDocumentFields(key, mltDocumentValue);
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return luceneIndex
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.moreLikeThis(resolveSnapshot(queryParams.snapshot()),
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queryParams.toQueryParams(),
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indicizer.getKeyFieldName(),
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mltDocumentFields
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)
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.flatMap(llSearchResult -> this.transformLuceneResultWithValues(llSearchResult,
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valueGetter
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));
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}
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/**
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*
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* @param queryParams the limit is valid for each lucene instance.
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* If you have 15 instances, the number of elements returned
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* can be at most <code>limit * 15</code>
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* @return the collection has one or more flux
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*/
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@Override
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public <V> Mono<SearchResultKeys<T>> search(ClientQueryParams<SearchResultKey<T>> queryParams) {
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return luceneIndex
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.search(resolveSnapshot(queryParams.snapshot()),
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queryParams.toQueryParams(),
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indicizer.getKeyFieldName()
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)
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.flatMap(this::transformLuceneResult);
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}
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/**
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*
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* @param queryParams the limit is valid for each lucene instance.
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* If you have 15 instances, the number of elements returned
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* can be at most <code>limit * 15</code>
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* @return the collection has one or more flux
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*/
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@Override
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public <V> Mono<SearchResult<T, U>> searchWithValues(ClientQueryParams<SearchResultItem<T, U>> queryParams,
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ValueGetter<T, U> valueGetter) {
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return luceneIndex
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.search(resolveSnapshot(queryParams.snapshot()), queryParams.toQueryParams(), indicizer.getKeyFieldName())
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.flatMap(llSearchResult -> this.transformLuceneResultWithValues(llSearchResult, valueGetter));
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}
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@Override
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public Mono<Long> count(@Nullable CompositeSnapshot snapshot, Query query) {
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return this.search(ClientQueryParams.<SearchResultKey<T>>builder().snapshot(snapshot).query(query).limit(0).build())
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.flatMap(tSearchResultKeys -> tSearchResultKeys.release().thenReturn(tSearchResultKeys.totalHitsCount()));
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}
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@Override
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public boolean isLowMemoryMode() {
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return luceneIndex.isLowMemoryMode();
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}
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@Override
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public Mono<Void> close() {
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return luceneIndex.close();
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}
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/**
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* Flush writes to disk
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*/
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@Override
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public Mono<Void> flush() {
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return luceneIndex.flush();
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}
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/**
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* Refresh index searcher
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*/
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@Override
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public Mono<Void> refresh() {
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return luceneIndex.refresh();
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}
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@Override
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public Mono<LLSnapshot> takeSnapshot() {
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return luceneIndex.takeSnapshot();
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}
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@Override
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public Mono<Void> releaseSnapshot(LLSnapshot snapshot) {
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return luceneIndex.releaseSnapshot(snapshot);
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}
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}
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