--- /dev/null
+package org.argeo.util;
+
+import java.text.NumberFormat;
+import java.text.ParseException;
+import java.util.Locale;
+
+/** A throughput, that is, a value per unit of time. */
+public class Throughput {
+ private final static NumberFormat usNumberFormat = NumberFormat.getInstance(Locale.US);
+
+ public enum Unit {
+ s, m, h, d
+ }
+
+ private final Double value;
+ private final Unit unit;
+
+ public Throughput(Double value, Unit unit) {
+ this.value = value;
+ this.unit = unit;
+ }
+
+ public Throughput(Long periodMs, Long count, Unit unit) {
+ if (unit.equals(Unit.s))
+ value = ((double) count * 1000d) / periodMs;
+ else if (unit.equals(Unit.m))
+ value = ((double) count * 60d * 1000d) / periodMs;
+ else if (unit.equals(Unit.h))
+ value = ((double) count * 60d * 60d * 1000d) / periodMs;
+ else if (unit.equals(Unit.d))
+ value = ((double) count * 24d * 60d * 60d * 1000d) / periodMs;
+ else
+ throw new IllegalArgumentException("Unsupported unit " + unit);
+ this.unit = unit;
+ }
+
+ public Throughput(Double value, String unitStr) {
+ this(value, Unit.valueOf(unitStr));
+ }
+
+ public Throughput(String def) {
+ int index = def.indexOf('/');
+ if (def.length() < 3 || index <= 0 || index != def.length() - 2)
+ throw new IllegalArgumentException(
+ def + " no a proper throughput definition" + " (should be <value>/<unit>, e.g. 3.54/s or 1500/h");
+ String valueStr = def.substring(0, index);
+ String unitStr = def.substring(index + 1);
+ try {
+ this.value = usNumberFormat.parse(valueStr).doubleValue();
+ } catch (ParseException e) {
+ throw new IllegalArgumentException("Cannot parse " + valueStr + " as a number.", e);
+ }
+ this.unit = Unit.valueOf(unitStr);
+ }
+
+ public Long asMsPeriod() {
+ if (unit.equals(Unit.s))
+ return Math.round(1000d / value);
+ else if (unit.equals(Unit.m))
+ return Math.round((60d * 1000d) / value);
+ else if (unit.equals(Unit.h))
+ return Math.round((60d * 60d * 1000d) / value);
+ else if (unit.equals(Unit.d))
+ return Math.round((24d * 60d * 60d * 1000d) / value);
+ else
+ throw new IllegalArgumentException("Unsupported unit " + unit);
+ }
+
+ @Override
+ public String toString() {
+ return usNumberFormat.format(value) + '/' + unit;
+ }
+
+ public Double getValue() {
+ return value;
+ }
+
+ public Unit getUnit() {
+ return unit;
+ }
+
+}