Finish refactoring SimpleLuceneLocalSearcher
This commit is contained in:
Andrea Cavalli
parent
8bc0284f27
commit
d1963a1d65
@ -5,6 +5,7 @@ import com.google.common.primitives.Longs;
|
||||
import io.net5.buffer.api.Buffer;
|
||||
import io.net5.buffer.api.BufferAllocator;
|
||||
import io.net5.buffer.api.CompositeBuffer;
|
||||
import io.net5.buffer.api.Resource;
|
||||
import io.net5.buffer.api.Send;
|
||||
import io.net5.util.IllegalReferenceCountException;
|
||||
import io.net5.util.internal.PlatformDependent;
|
||||
@ -24,6 +25,7 @@ import java.util.Objects;
|
||||
import java.util.Optional;
|
||||
import java.util.concurrent.Callable;
|
||||
import java.util.concurrent.atomic.AtomicLong;
|
||||
import java.util.function.Function;
|
||||
import java.util.function.ToIntFunction;
|
||||
import org.apache.lucene.document.Document;
|
||||
import org.apache.lucene.document.Field;
|
||||
@ -344,6 +346,47 @@ public class LLUtils {
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* cleanup resource
|
||||
* @param cleanupOnSuccess if true the resource will be cleaned up if the function is successful
|
||||
*/
|
||||
public static <U, T extends Resource<T>> Mono<U> usingSend(Mono<Send<T>> resourceSupplier,
|
||||
Function<Send<T>, Mono<U>> resourceClosure,
|
||||
boolean cleanupOnSuccess) {
|
||||
return Mono.usingWhen(resourceSupplier, resourceClosure,
|
||||
r -> {
|
||||
if (cleanupOnSuccess) {
|
||||
return Mono.fromRunnable(r::close);
|
||||
} else {
|
||||
return Mono.empty();
|
||||
}
|
||||
},
|
||||
(r, ex) -> Mono.fromRunnable(r::close),
|
||||
r -> Mono.fromRunnable(r::close))
|
||||
.doOnDiscard(Send.class, Send::close);
|
||||
}
|
||||
|
||||
/**
|
||||
* cleanup resource
|
||||
* @param cleanupOnSuccess if true the resource will be cleaned up if the function is successful
|
||||
*/
|
||||
public static <U, T extends Resource<T>, V extends T> Mono<U> usingResource(Mono<V> resourceSupplier,
|
||||
Function<V, Mono<U>> resourceClosure,
|
||||
boolean cleanupOnSuccess) {
|
||||
return Mono.usingWhen(resourceSupplier, resourceClosure,
|
||||
r -> {
|
||||
if (cleanupOnSuccess) {
|
||||
return Mono.fromRunnable(r::close);
|
||||
} else {
|
||||
return Mono.empty();
|
||||
}
|
||||
},
|
||||
(r, ex) -> Mono.fromRunnable(r::close),
|
||||
r -> Mono.fromRunnable(r::close))
|
||||
.doOnDiscard(Resource.class, Resource::close)
|
||||
.doOnDiscard(Send.class, Send::close);
|
||||
}
|
||||
|
||||
public static record DirectBuffer(@NotNull Send<Buffer> buffer, @NotNull ByteBuffer byteBuffer) {}
|
||||
|
||||
@NotNull
|
||||
|
||||
@ -19,7 +19,7 @@ public interface IndexSearchers extends Resource<IndexSearchers> {
|
||||
return new ShardedIndexSearchers(indexSearchers, d -> {});
|
||||
}
|
||||
|
||||
static IndexSearchers unsharded(LLIndexSearcher indexSearcher) {
|
||||
static UnshardedIndexSearchers unsharded(Send<LLIndexSearcher> indexSearcher) {
|
||||
return new UnshardedIndexSearchers(indexSearcher, d -> {});
|
||||
}
|
||||
|
||||
@ -30,9 +30,9 @@ public interface IndexSearchers extends Resource<IndexSearchers> {
|
||||
|
||||
private LLIndexSearcher indexSearcher;
|
||||
|
||||
public UnshardedIndexSearchers(LLIndexSearcher indexSearcher, Drop<UnshardedIndexSearchers> drop) {
|
||||
public UnshardedIndexSearchers(Send<LLIndexSearcher> indexSearcher, Drop<UnshardedIndexSearchers> drop) {
|
||||
super(new CloseOnDrop(drop));
|
||||
this.indexSearcher = indexSearcher;
|
||||
this.indexSearcher = indexSearcher.receive();
|
||||
}
|
||||
|
||||
@Override
|
||||
@ -46,6 +46,10 @@ public interface IndexSearchers extends Resource<IndexSearchers> {
|
||||
return indexSearcher;
|
||||
}
|
||||
|
||||
public LLIndexSearcher shard() {
|
||||
return this.shard(0);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected RuntimeException createResourceClosedException() {
|
||||
return new IllegalStateException("Closed");
|
||||
@ -53,7 +57,7 @@ public interface IndexSearchers extends Resource<IndexSearchers> {
|
||||
|
||||
@Override
|
||||
protected Owned<UnshardedIndexSearchers> prepareSend() {
|
||||
LLIndexSearcher indexSearcher = this.indexSearcher;
|
||||
Send<LLIndexSearcher> indexSearcher = this.indexSearcher.send();
|
||||
this.makeInaccessible();
|
||||
return drop -> new UnshardedIndexSearchers(indexSearcher, drop);
|
||||
}
|
||||
|
||||
@ -4,31 +4,23 @@ import static it.cavallium.dbengine.lucene.searcher.CurrentPageInfo.EMPTY_STATUS
|
||||
import static it.cavallium.dbengine.lucene.searcher.PaginationInfo.FIRST_PAGE_LIMIT;
|
||||
import static it.cavallium.dbengine.lucene.searcher.PaginationInfo.MAX_SINGLE_SEARCH_LIMIT;
|
||||
|
||||
import io.net5.buffer.api.Buffer;
|
||||
import io.net5.buffer.api.Resource;
|
||||
import io.net5.buffer.api.Send;
|
||||
import it.cavallium.dbengine.client.query.current.data.TotalHitsCount;
|
||||
import it.cavallium.dbengine.database.LLKeyScore;
|
||||
import it.cavallium.dbengine.database.LLUtils;
|
||||
import it.cavallium.dbengine.database.disk.LLIndexSearcher;
|
||||
import it.cavallium.dbengine.lucene.LuceneUtils;
|
||||
import it.cavallium.dbengine.lucene.searcher.IndexSearchers.UnshardedIndexSearchers;
|
||||
import java.io.IOException;
|
||||
import java.util.Arrays;
|
||||
import java.util.Objects;
|
||||
import java.util.Optional;
|
||||
import org.apache.lucene.search.IndexSearcher;
|
||||
import org.apache.lucene.search.ScoreDoc;
|
||||
import org.apache.lucene.search.TopDocs;
|
||||
import org.apache.lucene.search.TopDocsCollector;
|
||||
import org.apache.lucene.search.TotalHits;
|
||||
import reactor.core.publisher.Flux;
|
||||
import reactor.core.publisher.Mono;
|
||||
import reactor.core.publisher.SignalType;
|
||||
import reactor.core.scheduler.Scheduler;
|
||||
import reactor.core.publisher.SynchronousSink;
|
||||
import reactor.core.scheduler.Schedulers;
|
||||
import reactor.util.function.Tuple2;
|
||||
import reactor.util.function.Tuple3;
|
||||
import reactor.util.function.Tuples;
|
||||
|
||||
public class SimpleLuceneLocalSearcher implements LuceneLocalSearcher {
|
||||
|
||||
@ -38,107 +30,152 @@ public class SimpleLuceneLocalSearcher implements LuceneLocalSearcher {
|
||||
String keyFieldName) {
|
||||
|
||||
Objects.requireNonNull(queryParams.scoreMode(), "ScoreMode must not be null");
|
||||
PaginationInfo paginationInfo;
|
||||
PaginationInfo paginationInfo = getPaginationInfo(queryParams);
|
||||
|
||||
var indexSearchersMono = indexSearcherMono.map(IndexSearchers::unsharded);
|
||||
|
||||
return LLUtils.usingResource(indexSearchersMono, indexSearchers -> this
|
||||
// Search first page results
|
||||
.searchFirstPage(indexSearchers, queryParams, paginationInfo)
|
||||
// Compute the results of the first page
|
||||
.transform(firstPageTopDocsMono -> this.computeFirstPageResults(firstPageTopDocsMono, indexSearchers,
|
||||
keyFieldName, queryParams))
|
||||
// Compute other results
|
||||
.transform(firstResult -> this.computeOtherResults(firstResult, indexSearchers, queryParams, keyFieldName))
|
||||
// Ensure that one LuceneSearchResult is always returned
|
||||
.single(),
|
||||
false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the pagination info
|
||||
*/
|
||||
private PaginationInfo getPaginationInfo(LocalQueryParams queryParams) {
|
||||
if (queryParams.limit() <= MAX_SINGLE_SEARCH_LIMIT) {
|
||||
paginationInfo = new PaginationInfo(queryParams.limit(), queryParams.offset(), queryParams.limit(), true);
|
||||
return new PaginationInfo(queryParams.limit(), queryParams.offset(), queryParams.limit(), true);
|
||||
} else {
|
||||
paginationInfo = new PaginationInfo(queryParams.limit(), queryParams.offset(), FIRST_PAGE_LIMIT, false);
|
||||
return new PaginationInfo(queryParams.limit(), queryParams.offset(), FIRST_PAGE_LIMIT, false);
|
||||
}
|
||||
}
|
||||
|
||||
return indexSearcherMono
|
||||
.flatMap(indexSearcherToReceive -> {
|
||||
var indexSearcher = indexSearcherToReceive.receive();
|
||||
var indexSearchers = IndexSearchers.unsharded(indexSearcher);
|
||||
return Mono
|
||||
.fromCallable(() -> {
|
||||
LLUtils.ensureBlocking();
|
||||
TopDocsCollector<ScoreDoc> firstPageCollector = TopDocsSearcher.getTopDocsCollector(
|
||||
queryParams.sort(),
|
||||
LuceneUtils.safeLongToInt(paginationInfo.firstPageOffset() + paginationInfo.firstPageLimit()),
|
||||
null,
|
||||
LuceneUtils.totalHitsThreshold(),
|
||||
!paginationInfo.forceSinglePage(),
|
||||
queryParams.isScored());
|
||||
/**
|
||||
* Search effectively the raw results of the first page
|
||||
*/
|
||||
private Mono<PageData> searchFirstPage(UnshardedIndexSearchers indexSearchers,
|
||||
LocalQueryParams queryParams,
|
||||
PaginationInfo paginationInfo) {
|
||||
var limit = LuceneUtils.safeLongToInt(paginationInfo.firstPageOffset() + paginationInfo.firstPageLimit());
|
||||
var pagination = !paginationInfo.forceSinglePage();
|
||||
var resultsOffset = LuceneUtils.safeLongToInt(paginationInfo.firstPageOffset());
|
||||
return Mono
|
||||
.fromSupplier(() -> new CurrentPageInfo(null, limit, 0))
|
||||
.handle((s, sink) -> this.searchPageSync(queryParams, indexSearchers, pagination, resultsOffset, s, sink));
|
||||
}
|
||||
|
||||
indexSearcher.getIndexSearcher().search(queryParams.query(), firstPageCollector);
|
||||
return firstPageCollector.topDocs(LuceneUtils.safeLongToInt(paginationInfo.firstPageOffset()),
|
||||
LuceneUtils.safeLongToInt(paginationInfo.firstPageLimit())
|
||||
);
|
||||
})
|
||||
.map(firstPageTopDocs -> {
|
||||
Flux<LLKeyScore> firstPageHitsFlux = LuceneUtils.convertHits(Flux.fromArray(firstPageTopDocs.scoreDocs),
|
||||
indexSearchers, keyFieldName, true)
|
||||
.take(queryParams.limit(), true);
|
||||
|
||||
return Tuples.of(Optional.ofNullable(LuceneUtils.getLastScoreDoc(firstPageTopDocs.scoreDocs)),
|
||||
LuceneUtils.convertTotalHitsCount(firstPageTopDocs.totalHits), firstPageHitsFlux);
|
||||
})
|
||||
.map(firstResult -> {
|
||||
var firstPageLastScoreDoc = firstResult.getT1();
|
||||
var totalHitsCount = firstResult.getT2();
|
||||
var firstPageFlux = firstResult.getT3();
|
||||
|
||||
|
||||
Flux<LLKeyScore> nextHits;
|
||||
if (paginationInfo.forceSinglePage() || paginationInfo.totalLimit() - paginationInfo.firstPageLimit() <= 0) {
|
||||
nextHits = null;
|
||||
} else {
|
||||
nextHits = Flux.defer(() -> Flux
|
||||
.<TopDocs, CurrentPageInfo>generate(
|
||||
() -> new CurrentPageInfo(firstPageLastScoreDoc.orElse(null), paginationInfo.totalLimit() - paginationInfo.firstPageLimit(), 1),
|
||||
(s, sink) -> {
|
||||
LLUtils.ensureBlocking();
|
||||
if (s.last() != null && s.remainingLimit() > 0) {
|
||||
TopDocs pageTopDocs;
|
||||
try {
|
||||
TopDocsCollector<ScoreDoc> collector = TopDocsSearcher.getTopDocsCollector(queryParams.sort(),
|
||||
s.currentPageLimit(), s.last(), LuceneUtils.totalHitsThreshold(), true,
|
||||
queryParams.isScored());
|
||||
indexSearcher.getIndexSearcher().search(queryParams.query(), collector);
|
||||
pageTopDocs = collector.topDocs();
|
||||
} catch (IOException e) {
|
||||
sink.error(e);
|
||||
return EMPTY_STATUS;
|
||||
}
|
||||
var pageLastDoc = LuceneUtils.getLastScoreDoc(pageTopDocs.scoreDocs);
|
||||
sink.next(pageTopDocs);
|
||||
return new CurrentPageInfo(pageLastDoc, s.remainingLimit() - s.currentPageLimit(), s.pageIndex() + 1);
|
||||
} else {
|
||||
sink.complete();
|
||||
return EMPTY_STATUS;
|
||||
}
|
||||
},
|
||||
s -> {}
|
||||
)
|
||||
.subscribeOn(Schedulers.boundedElastic())
|
||||
.flatMapIterable(topDocs -> Arrays.asList(topDocs.scoreDocs))
|
||||
.transform(topFieldDocFlux -> LuceneUtils.convertHits(topFieldDocFlux, indexSearchers,
|
||||
keyFieldName, true))
|
||||
);
|
||||
}
|
||||
|
||||
Flux<LLKeyScore> combinedFlux;
|
||||
|
||||
if (nextHits != null) {
|
||||
combinedFlux = firstPageFlux
|
||||
.concatWith(nextHits);
|
||||
} else {
|
||||
combinedFlux = firstPageFlux;
|
||||
}
|
||||
return new LuceneSearchResult(totalHitsCount, combinedFlux, d -> {
|
||||
indexSearcher.close();
|
||||
indexSearchers.close();
|
||||
}).send();
|
||||
})
|
||||
.doFinally(s -> {
|
||||
// Close searchers if the search result has not been returned
|
||||
if (s != SignalType.ON_COMPLETE) {
|
||||
indexSearcher.close();
|
||||
indexSearchers.close();
|
||||
}
|
||||
});
|
||||
}
|
||||
/**
|
||||
* Search effectively the merged raw results of the next pages
|
||||
*/
|
||||
private Flux<LLKeyScore> searchOtherPages(UnshardedIndexSearchers indexSearchers,
|
||||
LocalQueryParams queryParams, String keyFieldName, CurrentPageInfo secondPageInfo) {
|
||||
return Flux
|
||||
.<PageData, CurrentPageInfo>generate(
|
||||
() -> secondPageInfo,
|
||||
(s, sink) -> searchPageSync(queryParams, indexSearchers, true, 0, s, sink),
|
||||
s -> {}
|
||||
)
|
||||
.doOnDiscard(Send.class, Send::close);
|
||||
.subscribeOn(Schedulers.boundedElastic())
|
||||
.map(PageData::topDocs)
|
||||
.flatMapIterable(topDocs -> Arrays.asList(topDocs.scoreDocs))
|
||||
.transform(topFieldDocFlux -> LuceneUtils.convertHits(topFieldDocFlux, indexSearchers,
|
||||
keyFieldName, true));
|
||||
}
|
||||
|
||||
private static record FirstPageResults(TotalHitsCount totalHitsCount, Flux<LLKeyScore> firstPageHitsFlux,
|
||||
CurrentPageInfo nextPageInfo) {}
|
||||
|
||||
/**
|
||||
* Compute the results of the first page, extracting useful data
|
||||
*/
|
||||
private Mono<FirstPageResults> computeFirstPageResults(Mono<PageData> firstPageDataMono,
|
||||
IndexSearchers indexSearchers,
|
||||
String keyFieldName,
|
||||
LocalQueryParams queryParams) {
|
||||
return firstPageDataMono.map(firstPageData -> {
|
||||
var totalHitsCount = LuceneUtils.convertTotalHitsCount(firstPageData.topDocs().totalHits);
|
||||
|
||||
Flux<LLKeyScore> firstPageHitsFlux = LuceneUtils.convertHits(Flux.fromArray(firstPageData.topDocs().scoreDocs),
|
||||
indexSearchers, keyFieldName, true)
|
||||
.take(queryParams.limit(), true);
|
||||
|
||||
CurrentPageInfo nextPageInfo = firstPageData.nextPageInfo();
|
||||
|
||||
return new FirstPageResults(totalHitsCount, firstPageHitsFlux, nextPageInfo);
|
||||
});
|
||||
}
|
||||
|
||||
private Mono<Send<LuceneSearchResult>> computeOtherResults(Mono<FirstPageResults> firstResultMono,
|
||||
UnshardedIndexSearchers indexSearchers,
|
||||
LocalQueryParams queryParams,
|
||||
String keyFieldName) {
|
||||
return firstResultMono.map(firstResult -> {
|
||||
var totalHitsCount = firstResult.totalHitsCount();
|
||||
var firstPageHitsFlux = firstResult.firstPageHitsFlux();
|
||||
var secondPageInfo = firstResult.nextPageInfo();
|
||||
|
||||
Flux<LLKeyScore> nextHitsFlux = searchOtherPages(indexSearchers, queryParams, keyFieldName, secondPageInfo);
|
||||
|
||||
Flux<LLKeyScore> combinedFlux = firstPageHitsFlux.concatWith(nextHitsFlux);
|
||||
return new LuceneSearchResult(totalHitsCount, combinedFlux, d -> indexSearchers.close()).send();
|
||||
});
|
||||
}
|
||||
|
||||
private static record PageData(TopDocs topDocs, CurrentPageInfo nextPageInfo) {}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param resultsOffset offset of the resulting topDocs. Useful if you want to
|
||||
* skip the first n results in the first page
|
||||
*/
|
||||
private CurrentPageInfo searchPageSync(LocalQueryParams queryParams,
|
||||
UnshardedIndexSearchers indexSearchers,
|
||||
boolean allowPagination,
|
||||
int resultsOffset,
|
||||
CurrentPageInfo s,
|
||||
SynchronousSink<PageData> sink) {
|
||||
LLUtils.ensureBlocking();
|
||||
if (resultsOffset < 0) {
|
||||
throw new IndexOutOfBoundsException(resultsOffset);
|
||||
}
|
||||
if ((s.pageIndex() == 0 || s.last() != null) && s.remainingLimit() > 0) {
|
||||
TopDocs pageTopDocs;
|
||||
try {
|
||||
TopDocsCollector<ScoreDoc> collector = TopDocsSearcher.getTopDocsCollector(queryParams.sort(),
|
||||
s.currentPageLimit(), s.last(), LuceneUtils.totalHitsThreshold(), allowPagination,
|
||||
queryParams.isScored());
|
||||
indexSearchers.shard().getIndexSearcher().search(queryParams.query(), collector);
|
||||
if (resultsOffset > 0) {
|
||||
pageTopDocs = collector.topDocs(resultsOffset, s.currentPageLimit());
|
||||
} else {
|
||||
pageTopDocs = collector.topDocs();
|
||||
}
|
||||
} catch (IOException e) {
|
||||
sink.error(e);
|
||||
return EMPTY_STATUS;
|
||||
}
|
||||
var pageLastDoc = LuceneUtils.getLastScoreDoc(pageTopDocs.scoreDocs);
|
||||
long nextRemainingLimit;
|
||||
if (allowPagination) {
|
||||
nextRemainingLimit = s.remainingLimit() - s.currentPageLimit();
|
||||
} else {
|
||||
nextRemainingLimit = 0L;
|
||||
}
|
||||
var nextPageIndex = s.pageIndex() + 1;
|
||||
var nextPageInfo = new CurrentPageInfo(pageLastDoc, nextRemainingLimit, nextPageIndex);
|
||||
sink.next(new PageData(pageTopDocs, nextPageInfo));
|
||||
return nextPageInfo;
|
||||
} else {
|
||||
sink.complete();
|
||||
return EMPTY_STATUS;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user