001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.util;
018
019import java.text.DecimalFormat;
020import java.text.DecimalFormatSymbols;
021import java.text.NumberFormat;
022import java.util.Locale;
023
024/**
025 * Time utils.
026 *
027 * @version 
028 */
029public final class TimeUtils {
030
031    private TimeUtils() {
032    }
033
034    /**
035     * Prints the duration in a human readable format as X days Y hours Z minutes etc.
036     *
037     * @param uptime the uptime in millis
038     * @return the time used for displaying on screen or in logs
039     */
040    public static String printDuration(double uptime) {
041        // Code taken from Karaf
042        // https://svn.apache.org/repos/asf/karaf/trunk/shell/commands/src/main/java/org/apache/karaf/shell/commands/impl/InfoAction.java
043
044        NumberFormat fmtI = new DecimalFormat("###,###", new DecimalFormatSymbols(Locale.ENGLISH));
045        NumberFormat fmtD = new DecimalFormat("###,##0.000", new DecimalFormatSymbols(Locale.ENGLISH));
046
047        uptime /= 1000;
048        if (uptime < 60) {
049            return fmtD.format(uptime) + " seconds";
050        }
051        uptime /= 60;
052        if (uptime < 60) {
053            long minutes = (long) uptime;
054            String s = fmtI.format(minutes) + (minutes > 1 ? " minutes" : " minute");
055            return s;
056        }
057        uptime /= 60;
058        if (uptime < 24) {
059            long hours = (long) uptime;
060            long minutes = (long) ((uptime - hours) * 60);
061            String s = fmtI.format(hours) + (hours > 1 ? " hours" : " hour");
062            if (minutes != 0) {
063                s += " " + fmtI.format(minutes) + (minutes > 1 ? " minutes" : " minute");
064            }
065            return s;
066        }
067        uptime /= 24;
068        long days = (long) uptime;
069        long hours = (long) ((uptime - days) * 24);
070        String s = fmtI.format(days) + (days > 1 ? " days" : " day");
071        if (hours != 0) {
072            s += " " + fmtI.format(hours) + (hours > 1 ? " hours" : " hour");
073        }
074        return s;
075    }
076
077}