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Adds in lazy execution for Lucene kNN queries
Signed-off-by: Kunal Kotwani <[email protected]>
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67 changes: 67 additions & 0 deletions
67
src/main/java/org/opensearch/knn/index/query/lucene/LuceneEngineKnnVectorQuery.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
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| package org.opensearch.knn.index.query.lucene; | ||
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| import lombok.AllArgsConstructor; | ||
| import lombok.extern.log4j.Log4j2; | ||
| import org.apache.lucene.search.IndexSearcher; | ||
| import org.apache.lucene.search.Query; | ||
| import org.apache.lucene.search.QueryVisitor; | ||
| import org.apache.lucene.search.ScoreMode; | ||
| import org.apache.lucene.search.Weight; | ||
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| import java.io.IOException; | ||
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| /** | ||
| * LuceneEngineKnnVectorQuery is a wrapper around a vector queries for the Lucene engine. | ||
| * This enables us to defer rewrites until weight creation to optimize repeated execution | ||
| * of Lucene based k-NN queries. | ||
| */ | ||
| @AllArgsConstructor | ||
| @Log4j2 | ||
| public class LuceneEngineKnnVectorQuery extends Query { | ||
| private final Query luceneQuery; | ||
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| /* | ||
| Prevents repeated rewrites of the query for the Lucene engine. | ||
| */ | ||
| @Override | ||
| public Query rewrite(IndexSearcher indexSearcher) { | ||
| return this; | ||
| } | ||
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| /* | ||
| Rewrites the query just before weight creation. | ||
| */ | ||
| @Override | ||
| public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException { | ||
| Query rewrittenQuery = luceneQuery.rewrite(searcher); | ||
| return rewrittenQuery.createWeight(searcher, scoreMode, boost); | ||
| } | ||
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| @Override | ||
| public String toString(String s) { | ||
| return luceneQuery.toString(); | ||
| } | ||
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| @Override | ||
| public void visit(QueryVisitor queryVisitor) { | ||
| queryVisitor.visitLeaf(this); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) return true; | ||
| if (o == null || getClass() != o.getClass()) return false; | ||
| LuceneEngineKnnVectorQuery otherQuery = (LuceneEngineKnnVectorQuery) o; | ||
| return luceneQuery.equals(otherQuery.luceneQuery); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return luceneQuery.hashCode(); | ||
| } | ||
| } |
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95 changes: 95 additions & 0 deletions
95
src/test/java/org/opensearch/knn/index/query/lucene/LuceneEngineKnnVectorQueryTests.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| * Copyright OpenSearch Contributors | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
|
|
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| package org.opensearch.knn.index.query.lucene; | ||
|
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| import org.apache.lucene.search.IndexSearcher; | ||
| import org.apache.lucene.search.Query; | ||
| import org.apache.lucene.search.QueryVisitor; | ||
| import org.apache.lucene.search.ScoreMode; | ||
| import org.apache.lucene.search.Weight; | ||
| import org.mockito.InjectMocks; | ||
| import org.mockito.Mock; | ||
| import org.mockito.Spy; | ||
| import org.opensearch.test.OpenSearchTestCase; | ||
|
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| import static org.mockito.ArgumentMatchers.*; | ||
| import static org.mockito.Mockito.verifyNoInteractions; | ||
| import static org.mockito.Mockito.when; | ||
| import static org.mockito.Mockito.times; | ||
| import static org.mockito.Mockito.verify; | ||
| import static org.mockito.MockitoAnnotations.openMocks; | ||
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| public class LuceneEngineKnnVectorQueryTests extends OpenSearchTestCase { | ||
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| @Mock | ||
| IndexSearcher indexSearcher; | ||
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| @Mock | ||
| Query luceneQuery; | ||
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| @Mock | ||
| Weight weight; | ||
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| @Mock | ||
| QueryVisitor queryVisitor; | ||
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| @Spy | ||
| @InjectMocks | ||
| LuceneEngineKnnVectorQuery objectUnderTest; | ||
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| @Override | ||
| public void setUp() throws Exception { | ||
| super.setUp(); | ||
| openMocks(this); | ||
| when(luceneQuery.rewrite(any(IndexSearcher.class))).thenReturn(luceneQuery); | ||
| when(luceneQuery.createWeight(any(IndexSearcher.class), any(ScoreMode.class), anyFloat())).thenReturn(weight); | ||
| } | ||
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| public void testRewrite() { | ||
| objectUnderTest.rewrite(indexSearcher); | ||
| objectUnderTest.rewrite(indexSearcher); | ||
| objectUnderTest.rewrite(indexSearcher); | ||
| verifyNoInteractions(luceneQuery); | ||
| verify(objectUnderTest, times(3)).rewrite(indexSearcher); | ||
| } | ||
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| public void testCreateWeight() throws Exception { | ||
| objectUnderTest.rewrite(indexSearcher); | ||
| objectUnderTest.rewrite(indexSearcher); | ||
| objectUnderTest.rewrite(indexSearcher); | ||
| verifyNoInteractions(luceneQuery); | ||
| Weight actualWeight = objectUnderTest.createWeight(indexSearcher, ScoreMode.TOP_DOCS, 1.0f); | ||
| verify(luceneQuery, times(1)).rewrite(indexSearcher); | ||
| verify(objectUnderTest, times(3)).rewrite(indexSearcher); | ||
| assertEquals(weight, actualWeight); | ||
| } | ||
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| public void testVisit() { | ||
| objectUnderTest.visit(queryVisitor); | ||
| verify(queryVisitor).visitLeaf(objectUnderTest); | ||
| } | ||
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| public void testEquals() { | ||
| LuceneEngineKnnVectorQuery mainQuery = new LuceneEngineKnnVectorQuery(luceneQuery); | ||
| LuceneEngineKnnVectorQuery otherQuery = new LuceneEngineKnnVectorQuery(luceneQuery); | ||
| assertEquals(mainQuery, otherQuery); | ||
| assertEquals(mainQuery, mainQuery); | ||
| assertNotEquals(mainQuery, null); | ||
| assertNotEquals(mainQuery, new Object()); | ||
| LuceneEngineKnnVectorQuery otherQuery2 = new LuceneEngineKnnVectorQuery(null); | ||
| assertNotEquals(mainQuery, otherQuery2); | ||
| } | ||
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| public void testHashCode() { | ||
| LuceneEngineKnnVectorQuery mainQuery = new LuceneEngineKnnVectorQuery(luceneQuery); | ||
| assertEquals(mainQuery.hashCode(), luceneQuery.hashCode()); | ||
| } | ||
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| public void testToString() { | ||
| LuceneEngineKnnVectorQuery mainQuery = new LuceneEngineKnnVectorQuery(luceneQuery); | ||
| assertEquals(mainQuery.toString(), luceneQuery.toString()); | ||
| } | ||
| } |