Class Unit

api/src/main/java/org/apache/sirona/counters/Unit.java:37–214

Units allow monitored data to have get typed. A primary unit is the finest unit for a data type. A primary unit can have derived units, that represent the same data type, but with a scale factor. A primary Unit is created with the Unit#Unit(String) constructor. A derived Unit is created with

 *
 */
public class Unit implements Comparable<Unit>, Serializable {
    private static final Map<String, Unit> UNITS = new ConcurrentHashMap<String, Unit>();

    /**
     * Time based units
     */
    public static class Time extends Unit {
        public static final Unit NANOSECOND = new Unit("ns");
        public static final Unit MICROSECOND = new Unit("us", NANOSECOND, 1000);
        public static final Unit MILLISECOND = new Unit("ms", MICROSECOND, 1000);
        public static final Unit SECOND = new Unit("s", MILLISECOND, 1000);
        public static final Unit MINUTE = new Unit("min", SECOND, 60);
        public static final Unit HOUR = new Unit("h", MINUTE, 60);
        public static final Unit DAY = new Unit("day", HOUR, 24);

        public Time(String name) {
            super(name);
        }

        public Time(String name, Unit derived, long scale) {
            super(name, derived, scale);
        }

    }

    /**
     * Binary data units
     */
    public static class Binary
            extends Unit {

        public static final Unit BYTE = new Unit("b");

        public static final Unit KBYTE = new Unit("Kb", BYTE, 1024);

        public static final Unit MBYTE = new Unit("Mb", KBYTE, 1024);

        public static final Unit GBYTE = new Unit("Gb", MBYTE, 1024);

        public Binary(String name) {
            super(name);
        }

        public Binary(String name, Unit derived, long scale) {
            super(name, derived, scale);
        }


    }

    /**
     * unit for basic item counters & gauges
     */
    // "BILLION" does not have same signification depending on country (10^12 or 10^9).
    // We use International system of unit names to avoid confusion
    // @see http://en.wikipedia.org/wiki/SI
    public static final Unit UNARY = new Unit("u");
    public static final Unit DECA = new Unit("*10", UNARY, 10);