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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.percolator.stats;
import org.apache.lucene.search.Query;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.metrics.CounterMetric;
import org.elasticsearch.common.metrics.MeanMetric;
import org.elasticsearch.index.settings.IndexSettingsService;
import org.elasticsearch.index.shard.AbstractIndexShardComponent;
import org.elasticsearch.index.shard.ShardId;
import java.util.concurrent.TimeUnit;
/**
* Shard level percolator service that maintains percolator metrics:
*
* - total time spent in percolate api
*
- the current number of percolate requests
*
- number of registered percolate queries
*
*/
public class ShardPercolateService extends AbstractIndexShardComponent {
@Inject
public ShardPercolateService(ShardId shardId, IndexSettingsService indexSettingsService) {
super(shardId, indexSettingsService.getSettings());
}
private final MeanMetric percolateMetric = new MeanMetric();
private final CounterMetric currentMetric = new CounterMetric();
private final CounterMetric numberOfQueries = new CounterMetric();
public void prePercolate() {
currentMetric.inc();
}
public void postPercolate(long tookInNanos) {
currentMetric.dec();
percolateMetric.inc(tookInNanos);
}
public void addedQuery(BytesRef id, Query previousQuery, Query newQuery) {
numberOfQueries.inc();
}
public void removedQuery(BytesRef id, Query query) {
numberOfQueries.dec();
}
/**
* @return The current metrics
*/
public PercolateStats stats() {
return new PercolateStats(percolateMetric.count(), TimeUnit.NANOSECONDS.toMillis(percolateMetric.sum()), currentMetric.count(), -1, numberOfQueries.count());
}
// Enable when a more efficient manner is found for estimating the size of a Lucene query.
/*private static long computeSizeInMemory(HashedBytesRef id, Query query) {
long size = (3 * RamUsageEstimator.NUM_BYTES_INT) + RamUsageEstimator.NUM_BYTES_OBJECT_REF + RamUsageEstimator.NUM_BYTES_OBJECT_HEADER + id.bytes.bytes.length;
size += RamEstimator.sizeOf(query);
return size;
}
private static final class RamEstimator {
// we move this into it's own class to exclude it from the forbidden API checks
// it's fine to use here!
static long sizeOf(Query query) {
return RamUsageEstimator.sizeOf(query);
}
}*/
}