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LuceneOptimizedWrappedBlendedInfixSuggester.java
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LuceneOptimizedWrappedBlendedInfixSuggester.java
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/*
* LuceneOptimizedWrappedBlendedInfixSuggester.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.
*/
package com.apple.foundationdb.record.lucene.codec;
import com.apple.foundationdb.record.RecordCoreArgumentException;
import com.apple.foundationdb.record.logging.LogMessageKeys;
import com.apple.foundationdb.record.lucene.LuceneIndexOptions;
import com.apple.foundationdb.record.lucene.LuceneLoggerInfoStream;
import com.apple.foundationdb.record.lucene.LuceneRecordContextProperties;
import com.apple.foundationdb.record.lucene.directory.FDBDirectoryManager;
import com.apple.foundationdb.record.provider.foundationdb.IndexMaintainerState;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.index.ConcurrentMergeScheduler;
import org.apache.lucene.index.IndexOptions;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.MergePolicy;
import org.apache.lucene.index.MergeTrigger;
import org.apache.lucene.index.TieredMergePolicy;
import org.apache.lucene.search.suggest.analyzing.AnalyzingInfixSuggester;
import org.apache.lucene.search.suggest.analyzing.BlendedInfixSuggester;
import org.apache.lucene.store.Directory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.IOException;
import java.util.concurrent.ThreadLocalRandom;
/**
* Optimized suggester based on {@link BlendedInfixSuggester} to override the {@link IndexWriterConfig} for index writer.
*/
public class LuceneOptimizedWrappedBlendedInfixSuggester extends BlendedInfixSuggester {
private static final Logger LOGGER = LoggerFactory.getLogger(LuceneOptimizedWrappedBlendedInfixSuggester.class);
private static final BlenderType DEFAULT_BLENDER_TYPE = BlenderType.POSITION_LINEAR;
@Nonnull
private final IndexMaintainerState state;
private final int mergeDirectoryCount;
@SuppressWarnings("squid:S107")
private LuceneOptimizedWrappedBlendedInfixSuggester(@Nonnull IndexMaintainerState state, @Nonnull Directory dir, @Nonnull Analyzer indexAnalyzer,
@Nonnull Analyzer queryAnalyzer, int minPrefixChars, BlenderType blenderType, int numFactor,
@Nullable Double exponent, boolean highlight, int mergeDirectoryCount) throws IOException {
super(dir, indexAnalyzer, queryAnalyzer, minPrefixChars, blenderType, numFactor, exponent, false, true, highlight);
this.state = state;
this.mergeDirectoryCount = mergeDirectoryCount;
}
@Override
protected IndexWriterConfig getIndexWriterConfig(Analyzer indexAnalyzer, IndexWriterConfig.OpenMode openMode) {
TieredMergePolicy tieredMergePolicy = new TieredMergePolicy();
tieredMergePolicy.setMaxMergedSegmentMB(Math.max(0.0, state.context.getPropertyStorage().getPropertyValue(LuceneRecordContextProperties.LUCENE_AUTO_COMPLETE_MERGE_MAX_SIZE)));
tieredMergePolicy.setNoCFSRatio(1.00);
IndexWriterConfig iwc = super.getIndexWriterConfig(indexAnalyzer, openMode);
iwc.setUseCompoundFile(true);
iwc.setMergePolicy(tieredMergePolicy);
iwc.setMergeScheduler(new ConcurrentMergeScheduler() {
@Override
public synchronized void merge(final MergeSource mergeSource, final MergeTrigger trigger) throws IOException {
if (state.context.getPropertyStorage().getPropertyValue(LuceneRecordContextProperties.LUCENE_MULTIPLE_MERGE_OPTIMIZATION_ENABLED) && trigger == MergeTrigger.FULL_FLUSH) {
if (ThreadLocalRandom.current().nextInt(mergeDirectoryCount) == 0) {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(FDBDirectoryManager.getMergeLogMessage(mergeSource, trigger, state, "Auto-complete index merge based on probability"));
}
super.merge(mergeSource, trigger);
} else {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(FDBDirectoryManager.getMergeLogMessage(mergeSource, trigger, state, "Auto-complete index merge aborted based on probability"));
}
synchronized (mergeSource) {
MergePolicy.OneMerge nextMerge = mergeSource.getNextMerge();
while (nextMerge != null) {
nextMerge.setAborted();
mergeSource.onMergeFinished(nextMerge);
nextMerge = mergeSource.getNextMerge();
}
}
}
} else {
if (LOGGER.isTraceEnabled()) {
LOGGER.trace(FDBDirectoryManager.getMergeLogMessage(mergeSource, trigger, state, "Auto-complete index merge"));
}
super.merge(mergeSource, trigger);
}
}
});
iwc.setCodec(new LuceneOptimizedCodec());
iwc.setInfoStream(new LuceneLoggerInfoStream(LOGGER));
return iwc;
}
@Nonnull
public static AnalyzingInfixSuggester getSuggester(@Nonnull IndexMaintainerState state, @Nonnull Directory dir,
@Nonnull Analyzer indexAnalyzer, @Nonnull Analyzer queryAnalyzer,
boolean highlight, @Nonnull IndexOptions indexOptions, int mergeDirectoryCount) {
final String autoCompleteBlenderType = state.index.getOption(LuceneIndexOptions.AUTO_COMPLETE_BLENDER_TYPE);
final String autoCompleteBlenderNumFactor = state.index.getOption(LuceneIndexOptions.AUTO_COMPLETE_BLENDER_NUM_FACTOR);
final String autoCompleteMinPrefixSize = state.index.getOption(LuceneIndexOptions.AUTO_COMPLETE_MIN_PREFIX_SIZE);
final String autoCompleteBlenderExponent = state.index.getOption(LuceneIndexOptions.AUTO_COMPLETE_BLENDER_EXPONENT);
final boolean useTermVectors = state.context.getPropertyStorage().getPropertyValue(LuceneRecordContextProperties.LUCENE_AUTO_COMPLETE_WITH_TERM_VECTORS);
final int minPrefixChars = autoCompleteMinPrefixSize == null ? DEFAULT_MIN_PREFIX_CHARS : Integer.parseInt(autoCompleteMinPrefixSize);
final BlenderType blenderType = autoCompleteBlenderType == null ? DEFAULT_BLENDER_TYPE : BlenderType.valueOf(autoCompleteBlenderType);
final int numFactor = autoCompleteBlenderNumFactor == null ? DEFAULT_NUM_FACTOR : Integer.parseInt(autoCompleteBlenderNumFactor);
final Double exponent = autoCompleteBlenderExponent == null ? null : Double.valueOf(autoCompleteBlenderExponent);
try {
return useTermVectors
? new LuceneOptimizedWrappedBlendedInfixSuggester(state, dir, indexAnalyzer, queryAnalyzer, minPrefixChars, blenderType, numFactor, exponent, highlight, mergeDirectoryCount)
: new LuceneOptimizedBlendedInfixSuggesterWithoutTermVectors(state, dir, indexAnalyzer, queryAnalyzer, minPrefixChars, blenderType,
numFactor, exponent, highlight, indexOptions, mergeDirectoryCount);
} catch (IllegalArgumentException iae) {
throw new RecordCoreArgumentException("Invalid parameter for auto complete suggester", iae)
.addLogInfo(LogMessageKeys.INDEX_NAME, state.index.getName());
} catch (IOException ioe) {
throw new RecordCoreArgumentException("Failure with underlying lucene index opening for auto complete suggester", ioe)
.addLogInfo(LogMessageKeys.INDEX_NAME, state.index.getName());
}
}
}