org.elasticsearch.indices.fielddata.cache.IndicesFieldDataCacheListener Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* 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.indices.fielddata.cache;
import org.apache.lucene.util.Accountable;
import org.elasticsearch.common.breaker.CircuitBreaker;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.index.fielddata.IndexFieldDataCache;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.indices.breaker.CircuitBreakerService;
/**
* A {@link org.elasticsearch.index.fielddata.IndexFieldDataCache.Listener} implementation that updates indices (node) level statistics / service about
* field data entries being loaded and unloaded.
*
* Currently it only decrements the memory used in the {@link CircuitBreakerService}.
*/
public class IndicesFieldDataCacheListener implements IndexFieldDataCache.Listener {
private final CircuitBreakerService circuitBreakerService;
@Inject
public IndicesFieldDataCacheListener(CircuitBreakerService circuitBreakerService) {
this.circuitBreakerService = circuitBreakerService;
}
@Override
public void onCache(ShardId shardId, String fieldName, Accountable fieldData) {
}
@Override
public void onRemoval(ShardId shardId, String fieldName, boolean wasEvicted, long sizeInBytes) {
assert sizeInBytes >= 0 : "When reducing circuit breaker, it should be adjusted with a number higher or equal to 0 and not [" + sizeInBytes + "]";
circuitBreakerService.getBreaker(CircuitBreaker.FIELDDATA).addWithoutBreaking(-sizeInBytes);
}
}