| /* |
| * 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 |
| * |
| * https://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.accumulo.core.util.time; |
| |
| import java.time.Duration; |
| import java.util.Objects; |
| import java.util.concurrent.TimeUnit; |
| |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * SteadyTime represents an approximation of the total duration of time this cluster has had a |
| * Manager. Because this represents an elapsed time it is guaranteed to not be negative. SteadyTime |
| * is not expected to represent real world date times, its main use is for computing deltas similar |
| * System.nanoTime but across JVM processes. |
| */ |
| public class SteadyTime implements Comparable<SteadyTime> { |
| |
| private final Duration time; |
| |
| private SteadyTime(Duration time) { |
| Preconditions.checkArgument(!time.isNegative(), "SteadyTime '%s' should not be negative.", |
| time.toNanos()); |
| this.time = time; |
| } |
| |
| public long getMillis() { |
| return time.toMillis(); |
| } |
| |
| public long getNanos() { |
| return time.toNanos(); |
| } |
| |
| public Duration getDuration() { |
| return time; |
| } |
| |
| public Duration minus(SteadyTime other) { |
| return time.minus(other.getDuration()); |
| } |
| |
| public SteadyTime plus(Duration other) { |
| return SteadyTime.from(time.plus(other)); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| SteadyTime that = (SteadyTime) o; |
| return Objects.equals(time, that.time); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(time); |
| } |
| |
| @Override |
| public int compareTo(SteadyTime other) { |
| return time.compareTo(other.time); |
| } |
| |
| @Override |
| public String toString() { |
| return "SteadyTime[" + time + "]"; |
| } |
| |
| public static SteadyTime from(long time, TimeUnit unit) { |
| return new SteadyTime(Duration.of(time, unit.toChronoUnit())); |
| } |
| |
| public static SteadyTime from(Duration time) { |
| return new SteadyTime(time); |
| } |
| |
| } |