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 public class Throughput {
  23         private final static NumberFormat usNumberFormat = NumberFormat
  24                         .getInstance(Locale.US);
  25
  26         public enum Unit {
  27                 s, m, h, d
  28         }
  29
  30         private final Double value;
  31         private final Unit unit;
  32
  33         public Throughput(Double value, Unit unit) {
  34                 this.value = value;
  35                 this.unit = unit;
  36         }
  37
  38         public Throughput(Long periodMs, Long count, Unit unit) {
  39                 if (unit.equals(Unit.s))
  40                         value = ((double) count * 1000d) / periodMs;
  41                 else if (unit.equals(Unit.m))
  42                         value = ((double) count * 60d * 1000d) / periodMs;
  43                 else if (unit.equals(Unit.h))
  44                         value = ((double) count * 60d * 60d * 1000d) / periodMs;
  45                 else if (unit.equals(Unit.d))
  46                         value = ((double) count * 24d * 60d * 60d * 1000d) / periodMs;
  47                 else
  48                         throw new UtilsException("Unsupported unit " + unit);
  49                 this.unit = unit;
  50         }
  51
  52         public Throughput(Double value, String unitStr) {
  53                 this(value, Unit.valueOf(unitStr));
  54         }
  55
  56         public Throughput(String def) {
  57                 int index = def.indexOf('/');
  58                 if (def.length() < 3 || index <= 0 || index != def.length() - 2)
  59                         throw new UtilsException(def + " no a proper throughput definition"
  60                                         + " (should be <value>/<unit>, e.g. 3.54/s or 1500/h");
  61                 String valueStr = def.substring(0, index);
  62                 String unitStr = def.substring(index + 1);
  63                 try {
  64                         this.value = usNumberFormat.parse(valueStr).doubleValue();
  65                 } catch (ParseException e) {
  66                         throw new UtilsException("Cannot parse " + valueStr
  67                                         + " as a number.", e);
  68                 }
  69                 this.unit = Unit.valueOf(unitStr);
  70         }
  71
  72         public Long asMsPeriod() {
  73                 if (unit.equals(Unit.s))
  74                         return Math.round(1000d / value);
  75                 else if (unit.equals(Unit.m))
  76                         return Math.round((60d * 1000d) / value);
  77                 else if (unit.equals(Unit.h))
  78                         return Math.round((60d * 60d * 1000d) / value);
  79                 else if (unit.equals(Unit.d))
  80                         return Math.round((24d * 60d * 60d * 1000d) / value);
  81                 else
  82                         throw new UtilsException("Unsupported unit " + unit);
  83         }
  84
  85         @Override
  86         public String toString() {
  87                 return usNumberFormat.format(value) + '/' + unit;
  88         }
  89
  90         public Double getValue() {
  91                 return value;
  92         }
  93
  94         public Unit getUnit() {
  95                 return unit;
  96         }
  97
  98 }