TimeUtils.java

/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.activemq.artemis.utils;


import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.Locale;

/**
 * Time utils.
 */
public final class TimeUtils {

   private TimeUtils() {
   }

   /**
    * Prints the duration in a human readable format as X days Y hours Z minutes etc.
    *
    * @param uptime the uptime in millis
    * @return the time used for displaying on screen or in logs
    */
   public static String printDuration(double uptime) {
      // Code taken from Karaf
      // https://svn.apache.org/repos/asf/karaf/trunk/shell/commands/src/main/java/org/apache/karaf/shell/commands/impl/InfoAction.java

      NumberFormat fmtI = new DecimalFormat("###,###", new DecimalFormatSymbols(Locale.ENGLISH));
      NumberFormat fmtD = new DecimalFormat("###,##0.000", new DecimalFormatSymbols(Locale.ENGLISH));

      uptime /= 1000;
      if (uptime < 60) {
         return fmtD.format(uptime) + " seconds";
      }
      uptime /= 60;
      if (uptime < 60) {
         long minutes = (long) uptime;
         String s = fmtI.format(minutes) + (minutes > 1 ? " minutes" : " minute");
         return s;
      }
      uptime /= 60;
      if (uptime < 24) {
         long hours = (long) uptime;
         long minutes = (long) ((uptime - hours) * 60);
         String s = fmtI.format(hours) + (hours > 1 ? " hours" : " hour");
         if (minutes != 0) {
            s += " " + fmtI.format(minutes) + (minutes > 1 ? " minutes" : " minute");
         }
         return s;
      }
      uptime /= 24;
      long days = (long) uptime;
      long hours = (long) ((uptime - days) * 24);
      String s = fmtI.format(days) + (days > 1 ? " days" : " day");
      if (hours != 0) {
         s += " " + fmtI.format(hours) + (hours > 1 ? " hours" : " hour");
      }
      return s;
   }

   public static boolean waitOnBoolean(boolean expected, long timeout, CheckMethod check) {
      long timeLeft = timeout;
      long interval = 10;
      while (check.check() != expected && timeLeft > 0) {
         try {
            Thread.sleep(interval);
         } catch (InterruptedException e) {
         }
         timeLeft -= interval;
      }
      return check.check() == expected;
   }

   public interface CheckMethod {
      boolean check();
   }
}