org.elasticsearch.index.merge.policy.AbstractMergePolicyProvider 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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* KIND, either express or implied. See the License for the
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package org.elasticsearch.index.merge.policy;
import org.apache.lucene.index.MergePolicy;
import org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.index.shard.AbstractIndexShardComponent;
import org.elasticsearch.index.store.Store;
public abstract class AbstractMergePolicyProvider extends AbstractIndexShardComponent implements MergePolicyProvider {
public static final String INDEX_COMPOUND_FORMAT = "index.compound_format";
protected volatile double noCFSRatio;
protected AbstractMergePolicyProvider(Store store) {
super(store.shardId(), store.indexSettings());
this.noCFSRatio = parseNoCFSRatio(indexSettings.get(INDEX_COMPOUND_FORMAT, Boolean.toString(store.suggestUseCompoundFile())));
}
public static double parseNoCFSRatio(String noCFSRatio) {
noCFSRatio = noCFSRatio.trim();
if (noCFSRatio.equalsIgnoreCase("true")) {
return 1.0d;
} else if (noCFSRatio.equalsIgnoreCase("false")) {
return 0.0;
} else {
try {
double value = Double.parseDouble(noCFSRatio);
if (value < 0.0 || value > 1.0) {
throw new ElasticSearchIllegalArgumentException("NoCFSRatio must be in the interval [0..1] but was: [" + value + "]");
}
return value;
} catch (NumberFormatException ex) {
throw new ElasticSearchIllegalArgumentException("Expected a boolean or a value in the interval [0..1] but was: [" + noCFSRatio + "]", ex);
}
}
}
public static String formatNoCFSRatio(double ratio) {
if (ratio == 1.0) {
return Boolean.TRUE.toString();
} else if (ratio == 0.0) {
return Boolean.FALSE.toString();
} else {
return Double.toString(ratio);
}
}
}