| /* |
| * 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.util; |
| |
| import java.time.Duration; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * Little duration counter. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Unstable |
| public class OperationDuration { |
| |
| /** |
| * Time in millis when the operation started. |
| */ |
| private final long started; |
| |
| /** |
| * Time when the operation finished. |
| */ |
| private long finished; |
| |
| /** |
| * Instantiate. |
| * The start time and finished time are both set |
| * to the current clock time. |
| */ |
| public OperationDuration() { |
| started = time(); |
| finished = started; |
| } |
| |
| /** |
| * Evaluate the system time. |
| * @return the current clock time. |
| */ |
| protected long time() { |
| return System.currentTimeMillis(); |
| } |
| |
| /** |
| * Update the finished time with the current system time. |
| */ |
| public void finished() { |
| finished = time(); |
| } |
| |
| /** |
| * Return the duration as {@link #humanTime(long)}. |
| * @return a printable duration. |
| */ |
| public String getDurationString() { |
| return humanTime(value()); |
| } |
| |
| /** |
| * Convert to a human time of minutes:seconds.millis. |
| * @param time time to humanize. |
| * @return a printable value. |
| */ |
| public static String humanTime(long time) { |
| long seconds = (time / 1000); |
| long minutes = (seconds / 60); |
| return String.format("%d:%02d.%03ds", minutes, seconds % 60, time % 1000); |
| } |
| |
| /** |
| * Return the duration as {@link #humanTime(long)}. |
| * @return a printable duration. |
| */ |
| @Override |
| public String toString() { |
| return getDurationString(); |
| } |
| |
| /** |
| * Get the duration in milliseconds. |
| * <p></p> |
| * This will be 0 until a call |
| * to {@link #finished()} has been made. |
| * @return the currently recorded duration. |
| */ |
| public long value() { |
| return finished -started; |
| } |
| |
| /** |
| * Get the duration of an operation as a java Duration |
| * instance. |
| * @return a duration. |
| */ |
| public Duration asDuration() { |
| return Duration.ofMillis(value()); |
| } |
| } |