| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.apache.hadoop.yarn.submarine.common.resource; |
| |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * Almost the same logic as UnitsConversionUtil[YARN-4081]. If the dependencies |
| * are upgraded to hadoop 3.*, this class can be replaced. |
| */ |
| public final class UnitsConversionUtil { |
| |
| private UnitsConversionUtil() {} |
| |
| /** |
| * Helper class for encapsulating conversion values. |
| */ |
| public static class Converter { |
| private long numerator; |
| private long denominator; |
| |
| Converter(long n, long d) { |
| this.numerator = n; |
| this.denominator = d; |
| } |
| } |
| |
| private static final String[] UNITS = {"p", "n", "u", "m", "", "k", "M", "G", |
| "T", "P", "Ki", "Mi", "Gi", "Ti", "Pi"}; |
| private static final List<String> SORTED_UNITS = Arrays.asList(UNITS); |
| public static final Set<String> KNOWN_UNITS = createKnownUnitsSet(); |
| private static final Converter PICO = |
| new Converter(1L, 1000L * 1000L * 1000L * 1000L); |
| private static final Converter NANO = |
| new Converter(1L, 1000L * 1000L * 1000L); |
| private static final Converter MICRO = new Converter(1L, 1000L * 1000L); |
| private static final Converter MILLI = new Converter(1L, 1000L); |
| private static final Converter BASE = new Converter(1L, 1L); |
| private static final Converter KILO = new Converter(1000L, 1L); |
| private static final Converter MEGA = new Converter(1000L * 1000L, 1L); |
| private static final Converter GIGA = |
| new Converter(1000L * 1000L * 1000L, 1L); |
| private static final Converter TERA = |
| new Converter(1000L * 1000L * 1000L * 1000L, 1L); |
| private static final Converter PETA = |
| new Converter(1000L * 1000L * 1000L * 1000L * 1000L, 1L); |
| |
| private static final Converter KILO_BINARY = new Converter(1024L, 1L); |
| private static final Converter MEGA_BINARY = new Converter(1024L * 1024L, 1L); |
| private static final Converter GIGA_BINARY = |
| new Converter(1024L * 1024L * 1024L, 1L); |
| private static final Converter TERA_BINARY = |
| new Converter(1024L * 1024L * 1024L * 1024L, 1L); |
| private static final Converter PETA_BINARY = |
| new Converter(1024L * 1024L * 1024L * 1024L * 1024L, 1L); |
| |
| private static Set<String> createKnownUnitsSet() { |
| Set<String> ret = new HashSet<>(); |
| ret.addAll(Arrays.asList(UNITS)); |
| return ret; |
| } |
| |
| private static Converter getConverter(String unit) { |
| switch (unit) { |
| case "p": |
| return PICO; |
| case "n": |
| return NANO; |
| case "u": |
| return MICRO; |
| case "m": |
| return MILLI; |
| case "": |
| return BASE; |
| case "k": |
| return KILO; |
| case "M": |
| return MEGA; |
| case "G": |
| return GIGA; |
| case "T": |
| return TERA; |
| case "P": |
| return PETA; |
| case "Ki": |
| return KILO_BINARY; |
| case "Mi": |
| return MEGA_BINARY; |
| case "Gi": |
| return GIGA_BINARY; |
| case "Ti": |
| return TERA_BINARY; |
| case "Pi": |
| return PETA_BINARY; |
| default: |
| throw new IllegalArgumentException( |
| "Unknown unit '" + unit + "'. Known units are " + KNOWN_UNITS); |
| } |
| } |
| |
| /** |
| * Converts a value from one unit to another. Supported units can be obtained |
| * by inspecting the KNOWN_UNITS set. |
| * |
| * @param fromUnit the unit of the from value |
| * @param toUnit the target unit |
| * @param fromValue the value you wish to convert |
| * @return the value in toUnit |
| */ |
| public static long convert(String fromUnit, String toUnit, long fromValue) { |
| if (toUnit == null || fromUnit == null) { |
| throw new IllegalArgumentException("One or more arguments are null"); |
| } |
| |
| if (fromUnit.equals(toUnit)) { |
| return fromValue; |
| } |
| Converter fc = getConverter(fromUnit); |
| Converter tc = getConverter(toUnit); |
| long numerator = fc.numerator * tc.denominator; |
| long denominator = fc.denominator * tc.numerator; |
| long numeratorMultiplierLimit = Long.MAX_VALUE / numerator; |
| if (numerator < denominator) { |
| if (numeratorMultiplierLimit < fromValue) { |
| String overflowMsg = |
| "Converting " + fromValue + " from '" + fromUnit + "' to '" + toUnit |
| + "' will result in an overflow of Long"; |
| throw new IllegalArgumentException(overflowMsg); |
| } |
| return (fromValue * numerator) / denominator; |
| } |
| if (numeratorMultiplierLimit > fromValue) { |
| return (numerator * fromValue) / denominator; |
| } |
| long tmp = numerator / denominator; |
| if ((Long.MAX_VALUE / tmp) < fromValue) { |
| String overflowMsg = |
| "Converting " + fromValue + " from '" + fromUnit + "' to '" + toUnit |
| + "' will result in an overflow of Long"; |
| throw new IllegalArgumentException(overflowMsg); |
| } |
| return fromValue * tmp; |
| } |
| |
| } |