org.elasticsearch.index.fielddata.plain.NonEstimatingEstimator Maven / Gradle / Ivy
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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.plain;
import org.apache.lucene.index.Terms;
import org.apache.lucene.index.TermsEnum;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.breaker.CircuitBreaker;
import java.io.IOException;
/**
* Estimator that does nothing except for adjust the breaker after the field
* data has been loaded. Useful for field data implementations that do not yet
* have pre-loading estimations.
*/
public class NonEstimatingEstimator implements AbstractIndexFieldData.PerValueEstimator {
private final CircuitBreaker breaker;
NonEstimatingEstimator(CircuitBreaker breaker) {
this.breaker = breaker;
}
@Override
public long bytesPerValue(BytesRef term) {
return 0;
}
@Override
public TermsEnum beforeLoad(Terms terms) throws IOException {
return null;
}
@Override
public void afterLoad(@Nullable TermsEnum termsEnum, long actualUsed) {
breaker.addWithoutBreaking(actualUsed);
}
}