org.elasticsearch.index.cache.filter.ShardFilterCache Maven / Gradle / Ivy
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* Licensed to ElasticSearch and Shay Banon under one
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* 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
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*/
package org.elasticsearch.index.cache.filter;
import com.google.common.cache.RemovalListener;
import com.google.common.cache.RemovalNotification;
import org.apache.lucene.search.DocIdSet;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.docset.DocIdSets;
import org.elasticsearch.common.metrics.CounterMetric;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.cache.filter.weighted.WeightedFilterCache;
import org.elasticsearch.index.settings.IndexSettings;
import org.elasticsearch.index.shard.AbstractIndexShardComponent;
import org.elasticsearch.index.shard.ShardId;
/**
*/
public class ShardFilterCache extends AbstractIndexShardComponent implements RemovalListener {
final CounterMetric evictionsMetric = new CounterMetric();
final CounterMetric totalMetric = new CounterMetric();
@Inject
public ShardFilterCache(ShardId shardId, @IndexSettings Settings indexSettings) {
super(shardId, indexSettings);
}
public FilterCacheStats stats() {
return new FilterCacheStats(totalMetric.count(), evictionsMetric.count());
}
public void onCached(long sizeInBytes) {
totalMetric.inc(sizeInBytes);
}
@Override
public void onRemoval(RemovalNotification removalNotification) {
if (removalNotification.wasEvicted()) {
evictionsMetric.inc();
}
if (removalNotification.getValue() != null) {
totalMetric.dec(DocIdSets.sizeInBytes(removalNotification.getValue()));
}
}
}