org.elasticsearch.index.termvectors.ShardTermVectorService Maven / Gradle / Ivy
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* the Apache License, Version 2.0 (the "License"); you may
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.index.termvectors;
import org.apache.lucene.index.Fields;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.MultiFields;
import org.apache.lucene.index.Term;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.action.termvector.TermVectorRequest;
import org.elasticsearch.action.termvector.TermVectorResponse;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.uid.Versions;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.mapper.MapperService;
import org.elasticsearch.index.mapper.Uid;
import org.elasticsearch.index.mapper.internal.UidFieldMapper;
import org.elasticsearch.index.settings.IndexSettings;
import org.elasticsearch.index.shard.AbstractIndexShardComponent;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.index.shard.service.IndexShard;
/**
*/
public class ShardTermVectorService extends AbstractIndexShardComponent {
private IndexShard indexShard;
private MapperService mapperService;
@Inject
public ShardTermVectorService(ShardId shardId, @IndexSettings Settings indexSettings, MapperService mapperService) {
super(shardId, indexSettings);
}
// sadly, to overcome cyclic dep, we need to do this and inject it ourselves...
public ShardTermVectorService setIndexShard(IndexShard indexShard) {
this.indexShard = indexShard;
return this;
}
public TermVectorResponse getTermVector(TermVectorRequest request) {
final Engine.Searcher searcher = indexShard.acquireSearcher("term_vector");
IndexReader topLevelReader = searcher.reader();
final TermVectorResponse termVectorResponse = new TermVectorResponse(request.index(), request.type(), request.id());
final Term uidTerm = new Term(UidFieldMapper.NAME, Uid.createUidAsBytes(request.type(), request.id()));
try {
Fields topLevelFields = MultiFields.getFields(topLevelReader);
Versions.DocIdAndVersion docIdAndVersion = Versions.loadDocIdAndVersion(topLevelReader, uidTerm);
if (docIdAndVersion != null) {
Fields termVectorsByField = docIdAndVersion.context.reader().getTermVectors(docIdAndVersion.docId);
termVectorResponse.setFields(termVectorsByField, request.selectedFields(), request.getFlags(), topLevelFields);
termVectorResponse.setExists(true);
termVectorResponse.setDocVersion(docIdAndVersion.version);
} else {
termVectorResponse.setExists(false);
}
} catch (Throwable ex) {
throw new ElasticsearchException("failed to execute term vector request", ex);
} finally {
searcher.release();
}
return termVectorResponse;
}
}