| /* |
| * 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.cassandra.simulator.utils; |
| |
| import java.util.Optional; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.cassandra.simulator.RandomSource; |
| |
| import static java.util.concurrent.TimeUnit.NANOSECONDS; |
| import static java.util.concurrent.TimeUnit.SECONDS; |
| |
| public class LongRange |
| { |
| public final long min; |
| public final long max; |
| |
| public LongRange(long min, long max) |
| { |
| this.min = min; |
| this.max = max; |
| } |
| |
| public LongRange(long min, long max, TimeUnit from, TimeUnit to) |
| { |
| this(to.convert(min,from), to.convert(max, from)); |
| } |
| |
| public long select(RandomSource random) |
| { |
| if (min == max) return min; |
| return random.uniform(min, 1 + max); |
| } |
| |
| public long select(RandomSource random, long minlb, long maxub) |
| { |
| long min = Math.max(this.min, minlb); |
| long max = Math.min(this.max, maxub); |
| if (min >= max) return min; |
| return random.uniform(min, 1 + max); |
| } |
| |
| public static Optional<LongRange> parseRange(Optional<String> chance) |
| { |
| return chance.map(s -> new LongRange(Integer.parseInt(s.replaceFirst("\\.\\.+[0-9]+", "")), |
| Integer.parseInt(s.replaceFirst("[0-9]+\\.\\.+", "")))); |
| } |
| |
| public static Optional<LongRange> parseNanosRange(Optional<String> chance) |
| { |
| if (!chance.isPresent()) |
| return Optional.empty(); |
| |
| String parse = chance.get(); |
| TimeUnit units = parseUnits(parse); |
| parse = stripUnits(parse, units); |
| return Optional.of(new LongRange(Long.parseLong(parse.replaceFirst("\\.\\.+[0-9]+", "")), |
| Long.parseLong(parse.replaceFirst("[0-9]+\\.\\.+", "")), |
| units, NANOSECONDS)); |
| } |
| |
| public static TimeUnit parseUnits(String parse) |
| { |
| TimeUnit units; |
| if (parse.endsWith("ms")) units = TimeUnit.MILLISECONDS; |
| else if (parse.endsWith("us")) units = TimeUnit.MICROSECONDS; |
| else if (parse.endsWith("ns")) units = NANOSECONDS; |
| else if (parse.endsWith("s")) units = SECONDS; |
| else throw new IllegalArgumentException("Unable to parse period range: " + parse); |
| return units; |
| } |
| |
| public static String stripUnits(String parse, TimeUnit units) |
| { |
| return parse.substring(0, parse.length() - (units == SECONDS ? 1 : 2)); |
| } |
| |
| } |