/**
* Interface for Metric types.
*
* Implementations
* <p>
* <li><a href="Counter.html">Counter</a>, things that increment or decrement.</li>
* <li><a href="Gauge.html">Gauge</a>, values that can be read instantly via a supplied call back.</li>
* <li><a href="Histogram.html">Histogram</a>, keeps a reservoir of statistically relevant values to explore their distribution.</li>
* <li><a href="Meter.html">Meter</a>, things that are measured as events / interval.</li>
* <li><a href="NoOpMeter.html">NoOpMeter</a>, an empty impl of meter, useful for supplying to a Timer, when you only care about the Histogram.</li>
* <li><a href="SettableGauge.html">SettableGauge</a>, just like a Gauge but its value is set directly rather than supplied by a callback.</li>
* <li><a href="CachedGauge.html">CachedGauge</a>, A Cached Gauge takes a function that returns a promise that resolves a value that should be cached and updated on a given interval.</li>
* <li><a href="Timer.html">Timer</a>, timers are a combination of Meters and Histograms. They measure the rate as well as distribution of scalar events.</li>
* </p>
*
* @interface Metric
*/
// eslint-disable-next-line no-unused-vars
class Metric {
/**
* Please note that dispite its name, this method can return raw numbers on
* certain implementations such as counters and gauges.
*
* @return {any} Returns the data from the Metric
*/
toJSON() {}
/**
* The type of the Metric Impl. {@link MetricTypes}.
* @return {string} The type of the Metric Impl.
*/
getType() {}
}
/**
* An enum like object that is the set of core metric types that all implementors of {@link Metric} are.
*
* @typedef MetricTypes
* @interface MetricTypes
* @type {Object.<string, string>}
* @property {COUNTER} The type for Counters.
* @property {GAUGE} The type for Gauges.
* @property {HISTOGRAM} The type for Histograms.
* @property {METER} The type for Meters.
* @property {TIMER} The type for Timers.
*/
const MetricTypes = {
COUNTER: 'Counter',
GAUGE: 'Gauge',
HISTOGRAM: 'Histogram',
METER: 'Meter',
TIMER: 'Timer'
};
module.exports = {
MetricTypes
};
Measured