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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.index.fielddata.ordinals;
import org.apache.logging.log4j.Logger;
import org.apache.lucene.index.DocValues;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.MultiDocValues.OrdinalMap;
import org.apache.lucene.index.RandomAccessOrds;
import org.apache.lucene.util.Accountable;
import org.apache.lucene.util.packed.PackedInts;
import org.elasticsearch.common.breaker.CircuitBreaker;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.IndexSettings;
import org.elasticsearch.index.fielddata.AtomicOrdinalsFieldData;
import org.elasticsearch.index.fielddata.IndexOrdinalsFieldData;
import org.elasticsearch.index.fielddata.ScriptDocValues;
import org.elasticsearch.index.fielddata.plain.AbstractAtomicOrdinalsFieldData;
import org.elasticsearch.indices.breaker.CircuitBreakerService;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;
/**
* Utility class to build global ordinals.
*/
public enum GlobalOrdinalsBuilder {
;
/**
* Build global ordinals for the provided {@link IndexReader}.
*/
public static IndexOrdinalsFieldData build(final IndexReader indexReader, IndexOrdinalsFieldData indexFieldData,
IndexSettings indexSettings, CircuitBreakerService breakerService, Logger logger,
Function<RandomAccessOrds, ScriptDocValues<?>> scriptFunction) throws IOException {
assert indexReader.leaves().size() > 1;
long startTimeNS = System.nanoTime();
final AtomicOrdinalsFieldData[] atomicFD = new AtomicOrdinalsFieldData[indexReader.leaves().size()];
final RandomAccessOrds[] subs = new RandomAccessOrds[indexReader.leaves().size()];
for (int i = 0; i < indexReader.leaves().size(); ++i) {
atomicFD[i] = indexFieldData.load(indexReader.leaves().get(i));
subs[i] = atomicFD[i].getOrdinalsValues();
}
final OrdinalMap ordinalMap = OrdinalMap.build(null, subs, PackedInts.DEFAULT);
final long memorySizeInBytes = ordinalMap.ramBytesUsed();
breakerService.getBreaker(CircuitBreaker.FIELDDATA).addWithoutBreaking(memorySizeInBytes);
if (logger.isDebugEnabled()) {
logger.debug(
"global-ordinals [{}][{}] took [{}]",
indexFieldData.getFieldName(),
ordinalMap.getValueCount(),
new TimeValue(System.nanoTime() - startTimeNS, TimeUnit.NANOSECONDS)
);
}
return new InternalGlobalOrdinalsIndexFieldData(indexSettings, indexFieldData.getFieldName(),
atomicFD, ordinalMap, memorySizeInBytes, scriptFunction
);
}
public static IndexOrdinalsFieldData buildEmpty(IndexSettings indexSettings, final IndexReader indexReader, IndexOrdinalsFieldData indexFieldData) throws IOException {
assert indexReader.leaves().size() > 1;
final AtomicOrdinalsFieldData[] atomicFD = new AtomicOrdinalsFieldData[indexReader.leaves().size()];
final RandomAccessOrds[] subs = new RandomAccessOrds[indexReader.leaves().size()];
for (int i = 0; i < indexReader.leaves().size(); ++i) {
atomicFD[i] = new AbstractAtomicOrdinalsFieldData(AbstractAtomicOrdinalsFieldData.DEFAULT_SCRIPT_FUNCTION) {
@Override
public RandomAccessOrds getOrdinalsValues() {
return DocValues.emptySortedSet();
}
@Override
public long ramBytesUsed() {
return 0;
}
@Override
public Collection<Accountable> getChildResources() {
return Collections.emptyList();
}
@Override
public void close() {
}
};
subs[i] = atomicFD[i].getOrdinalsValues();
}
final OrdinalMap ordinalMap = OrdinalMap.build(null, subs, PackedInts.DEFAULT);
return new InternalGlobalOrdinalsIndexFieldData(indexSettings, indexFieldData.getFieldName(),
atomicFD, ordinalMap, 0, AbstractAtomicOrdinalsFieldData.DEFAULT_SCRIPT_FUNCTION
);
}
}
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