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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.index.analysis;
import org.apache.lucene.analysis.Analyzer;
import org.elasticsearch.Version;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.core.internal.io.IOUtils;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.IndexSettings;
import org.elasticsearch.indices.analysis.PreBuiltAnalyzers;
import org.elasticsearch.indices.analysis.PreBuiltCacheFactory;
import java.io.Closeable;
import java.io.IOException;
import java.util.Collection;
import java.util.List;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collectors;
public class PreBuiltAnalyzerProviderFactory extends PreConfiguredAnalysisComponent> implements Closeable {
private final Function create;
private final PreBuiltAnalyzerProvider current;
/**
* This constructor only exists to expose analyzers defined in {@link PreBuiltAnalyzers} as {@link PreBuiltAnalyzerProviderFactory}.
*/
PreBuiltAnalyzerProviderFactory(String name, PreBuiltAnalyzers preBuiltAnalyzer) {
super(name, new PreBuiltAnalyzersDelegateCache(name, preBuiltAnalyzer));
this.create = preBuiltAnalyzer::getAnalyzer;
Analyzer analyzer = preBuiltAnalyzer.getAnalyzer(Version.CURRENT);
analyzer.setVersion(Version.CURRENT.luceneVersion);
current = new PreBuiltAnalyzerProvider(name, AnalyzerScope.INDICES, analyzer);
}
public PreBuiltAnalyzerProviderFactory(String name, PreBuiltCacheFactory.CachingStrategy cache, Supplier create) {
super(name, cache);
this.create = version -> create.get();
Analyzer analyzer = create.get();
analyzer.setVersion(Version.CURRENT.luceneVersion);
this.current = new PreBuiltAnalyzerProvider(name, AnalyzerScope.INDICES, analyzer);
}
@Override
public AnalyzerProvider get(IndexSettings indexSettings, Environment environment, String name, Settings settings)
throws IOException {
Version versionCreated = indexSettings.getIndexVersionCreated();
if (Version.CURRENT.equals(versionCreated) == false) {
return super.get(indexSettings, environment, name, settings);
} else {
return current;
}
}
@Override
protected AnalyzerProvider create(Version version) {
assert Version.CURRENT.equals(version) == false;
Analyzer analyzer = create.apply(version);
analyzer.setVersion(version.luceneVersion);
return new PreBuiltAnalyzerProvider(getName(), AnalyzerScope.INDICES, analyzer);
}
@Override
public void close() throws IOException {
List closeables = cache.values().stream().map(AnalyzerProvider::get).collect(Collectors.toList());
closeables.add(current.get());
IOUtils.close(closeables);
}
/**
* A special cache that closes the gap between PreBuiltAnalyzers and PreBuiltAnalyzerProviderFactory.
*
* This can be removed when all analyzers have been moved away from PreBuiltAnalyzers to
* PreBuiltAnalyzerProviderFactory either in server or analysis-common.
*/
static class PreBuiltAnalyzersDelegateCache implements PreBuiltCacheFactory.PreBuiltCache> {
private final String name;
private final PreBuiltAnalyzers preBuiltAnalyzer;
private PreBuiltAnalyzersDelegateCache(String name, PreBuiltAnalyzers preBuiltAnalyzer) {
this.name = name;
this.preBuiltAnalyzer = preBuiltAnalyzer;
}
@Override
public AnalyzerProvider get(Version version) {
return new PreBuiltAnalyzerProvider(name, AnalyzerScope.INDICES, preBuiltAnalyzer.getAnalyzer(version));
}
@Override
public void put(Version version, AnalyzerProvider analyzerProvider) {
// No need to put, because we delegate in get() directly to PreBuiltAnalyzers which already caches.
}
@Override
public Collection> values() {
return preBuiltAnalyzer.getCache()
.values()
.stream()
// Wrap the analyzer instance in a PreBuiltAnalyzerProvider, this is what PreBuiltAnalyzerProviderFactory#close expects
// (other caches are not directly caching analyzers, but analyzer provider instead)
.map(analyzer -> new PreBuiltAnalyzerProvider(name, AnalyzerScope.INDICES, analyzer))
.collect(Collectors.toList());
}
}
}