X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.enterprise%2Fsrc%2Forg%2Fargeo%2Futil%2FThroughput.java;fp=org.argeo.enterprise%2Fsrc%2Forg%2Fargeo%2Futil%2FThroughput.java;h=266ddbc5885c0f0f75cdcdd9774a59acb96244e4;hb=fba24f5ac520b99b3ac75781c95f11c48ac6252f;hp=0000000000000000000000000000000000000000;hpb=3fbd05aa39ef235128e134fde8fd24167208e781;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.enterprise/src/org/argeo/util/Throughput.java b/org.argeo.enterprise/src/org/argeo/util/Throughput.java
new file mode 100644
index 000000000..266ddbc58
--- /dev/null
+++ b/org.argeo.enterprise/src/org/argeo/util/Throughput.java
@@ -0,0 +1,82 @@
+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;
+	}
+
+}