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Resolves #1682: Support auto-complete via querying main Lucene direct…
…ory (#1683) * Current State is rough * Resolves #1682: Support auto-complete via querying main Lucene directory This modifies the auto-complete cursor so that it reads from the main Lucene index and then reconstitutes the original text by reading from the base record data. Co-authored-by: john_leach <jleach4@gmail.com>
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501 changes: 438 additions & 63 deletions
501
...ne/src/main/java/com/apple/foundationdb/record/lucene/LuceneAutoCompleteResultCursor.java
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79 changes: 79 additions & 0 deletions
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...r-lucene/src/main/java/com/apple/foundationdb/record/lucene/LuceneCursorContinuation.java
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|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| /* | ||
| * LuceneCursorContinuation.java | ||
| * | ||
| * This source file is part of the FoundationDB open source project | ||
| * | ||
| * Copyright 2015-2022 Apple Inc. and the FoundationDB project authors | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package com.apple.foundationdb.record.lucene; | ||
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| import com.apple.foundationdb.record.RecordCursorContinuation; | ||
| import com.google.protobuf.ByteString; | ||
| import org.apache.lucene.search.ScoreDoc; | ||
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| import javax.annotation.Nonnull; | ||
| import javax.annotation.Nullable; | ||
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| /** | ||
| * Continuation from scanning a Lucene index. This wraps the LuceneIndexContinuation protobuf message, | ||
| * which contains enough information to use the Lucene | ||
| * {@link org.apache.lucene.search.IndexSearcher#searchAfter(ScoreDoc, org.apache.lucene.search.Query, int) searchAfter} | ||
| * feature to resume a query. | ||
| */ | ||
| class LuceneCursorContinuation implements RecordCursorContinuation { | ||
| @Nonnull | ||
| private final LuceneContinuationProto.LuceneIndexContinuation protoContinuation; | ||
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| @SuppressWarnings("squid:S3077") // Byte array is immutable once created, so does not need to use atomic array | ||
| private volatile byte[] byteContinuation; | ||
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| private LuceneCursorContinuation(@Nonnull LuceneContinuationProto.LuceneIndexContinuation protoContinuation) { | ||
| this.protoContinuation = protoContinuation; | ||
| } | ||
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| @Nullable | ||
| @Override | ||
| public byte[] toBytes() { | ||
| if (byteContinuation == null) { | ||
| synchronized (this) { | ||
| if (byteContinuation == null) { | ||
| byteContinuation = toByteString().toByteArray(); | ||
| } | ||
| } | ||
| } | ||
| return byteContinuation; | ||
| } | ||
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| @Nonnull | ||
| @Override | ||
| public ByteString toByteString() { | ||
| return protoContinuation.toByteString(); | ||
| } | ||
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| @Override | ||
| public boolean isEnd() { | ||
| return false; | ||
| } | ||
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| public static LuceneCursorContinuation fromScoreDoc(ScoreDoc scoreDoc) { | ||
| return new LuceneCursorContinuation(LuceneContinuationProto.LuceneIndexContinuation.newBuilder() | ||
| .setDoc(scoreDoc.doc) | ||
| .setShard(scoreDoc.shardIndex) | ||
| .setScore(scoreDoc.score) | ||
| .build() | ||
| ); | ||
| } | ||
| } |
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