org.elasticsearch.common.unit.MemorySizeValue Maven / Gradle / Ivy

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 * 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.common.unit;

import org.elasticsearch.monitor.jvm.JvmInfo;

import static org.elasticsearch.common.unit.ByteSizeValue.parseBytesSizeValue;

/** Utility methods to get memory sizes. */
public enum MemorySizeValue {
    ;

    /** Parse the provided string as a memory size. This method either accepts absolute values such as
     *  42 (default assumed unit is byte) or 2mb, or percentages of the heap size: if
     *  the heap is 1G, 10% will be parsed as 100mb.  */
    public static ByteSizeValue parseBytesSizeValueOrHeapRatio(String sValue) {
        if (sValue.endsWith("%")) {
            double percent = Double.parseDouble(sValue.substring(0, sValue.length() - 1));
            return new ByteSizeValue((long) ((percent / 100) * JvmInfo.jvmInfo().getMem().getHeapMax().bytes()), ByteSizeUnit.BYTES);
        } else {
            return parseBytesSizeValue(sValue);
        }
    }
}