org.argeo.util/src/org/argeo/util/Throughput.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.util;
  17
  18 import java.text.NumberFormat;
  19 import java.text.ParseException;
  20 import java.util.Locale;
  21
  22 import org.argeo.ArgeoException;
  23
  24 public class Throughput {
  25         private final static NumberFormat usNumberFormat = NumberFormat
  26                         .getInstance(Locale.US);
  27
  28         public enum Unit {
  29                 s, m, h, d
  30         }
  31
  32         private final Double value;
  33         private final Unit unit;
  34
  35         public Throughput(Double value, Unit unit) {
  36                 this.value = value;
  37                 this.unit = unit;
  38         }
  39
  40         public Throughput(Long periodMs, Long count, Unit unit) {
  41                 if (unit.equals(Unit.s))
  42                         value = ((double) count * 1000d) / periodMs;
  43                 else if (unit.equals(Unit.m))
  44                         value = ((double) count * 60d * 1000d) / periodMs;
  45                 else if (unit.equals(Unit.h))
  46                         value = ((double) count * 60d * 60d * 1000d) / periodMs;
  47                 else if (unit.equals(Unit.d))
  48                         value = ((double) count * 24d * 60d * 60d * 1000d) / periodMs;
  49                 else
  50                         throw new ArgeoException("Unsupported unit " + unit);
  51                 this.unit = unit;
  52         }
  53
  54         public Throughput(Double value, String unitStr) {
  55                 this(value, Unit.valueOf(unitStr));
  56         }
  57
  58         public Throughput(String def) {
  59                 int index = def.indexOf('/');
  60                 if (def.length() < 3 || index <= 0 || index != def.length() - 2)
  61                         throw new ArgeoException(def + " no a proper throughput definition"
  62                                         + " (should be <value>/<unit>, e.g. 3.54/s or 1500/h");
  63                 String valueStr = def.substring(0, index);
  64                 String unitStr = def.substring(index + 1);
  65                 try {
  66                         this.value = usNumberFormat.parse(valueStr).doubleValue();
  67                 } catch (ParseException e) {
  68                         throw new ArgeoException("Cannot parse " + valueStr
  69                                         + " as a number.", e);
  70                 }
  71                 this.unit = Unit.valueOf(unitStr);
  72         }
  73
  74         public Long asMsPeriod() {
  75                 if (unit.equals(Unit.s))
  76                         return Math.round(1000d / value);
  77                 else if (unit.equals(Unit.m))
  78                         return Math.round((60d * 1000d) / value);
  79                 else if (unit.equals(Unit.h))
  80                         return Math.round((60d * 60d * 1000d) / value);
  81                 else if (unit.equals(Unit.d))
  82                         return Math.round((24d * 60d * 60d * 1000d) / value);
  83                 else
  84                         throw new ArgeoException("Unsupported unit " + unit);
  85         }
  86
  87         @Override
  88         public String toString() {
  89                 return usNumberFormat.format(value) + '/' + unit;
  90         }
  91
  92         public Double getValue() {
  93                 return value;
  94         }
  95
  96         public Unit getUnit() {
  97                 return unit;
  98         }
  99
 100 }