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Elasticsearch subproject :server
/*
* 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.fielddata;
import org.apache.lucene.util.Accountable;
import org.elasticsearch.common.FieldMemoryStats;
import org.elasticsearch.common.metrics.CounterMetric;
import org.elasticsearch.common.regex.Regex;
import org.elasticsearch.common.util.CollectionUtils;
import org.elasticsearch.common.util.concurrent.ConcurrentCollections;
import org.elasticsearch.index.shard.ShardId;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentMap;
public class ShardFieldData implements IndexFieldDataCache.Listener {
private final CounterMetric evictionsMetric = new CounterMetric();
private final CounterMetric totalMetric = new CounterMetric();
private final ConcurrentMap perFieldTotals = ConcurrentCollections.newConcurrentMap();
public FieldDataStats stats(String... fields) {
Map fieldTotals = null;
if (CollectionUtils.isEmpty(fields) == false) {
fieldTotals = new HashMap<>();
for (Map.Entry entry : perFieldTotals.entrySet()) {
if (Regex.simpleMatch(fields, entry.getKey())) {
fieldTotals.put(entry.getKey(), entry.getValue().count());
}
}
}
return new FieldDataStats(
totalMetric.count(),
evictionsMetric.count(),
fieldTotals == null ? null : new FieldMemoryStats(fieldTotals)
);
}
@Override
public void onCache(ShardId shardId, String fieldName, Accountable ramUsage) {
totalMetric.inc(ramUsage.ramBytesUsed());
CounterMetric total = perFieldTotals.get(fieldName);
if (total != null) {
total.inc(ramUsage.ramBytesUsed());
} else {
total = new CounterMetric();
total.inc(ramUsage.ramBytesUsed());
CounterMetric prev = perFieldTotals.putIfAbsent(fieldName, total);
if (prev != null) {
prev.inc(ramUsage.ramBytesUsed());
}
}
}
@Override
public void onRemoval(ShardId shardId, String fieldName, boolean wasEvicted, long sizeInBytes) {
if (wasEvicted) {
evictionsMetric.inc();
}
if (sizeInBytes != -1) {
totalMetric.dec(sizeInBytes);
CounterMetric total = perFieldTotals.get(fieldName);
if (total != null) {
total.dec(sizeInBytes);
}
}
}
}