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     */
017    package org.apache.activemq.util;
018    
019    import java.text.DecimalFormat;
020    import java.text.DecimalFormatSymbols;
021    import java.text.NumberFormat;
022    import java.util.Locale;
023    
024    /**
025     * Time utils.
026     *
027     * @version
028     */
029    public 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    }