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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* A metrics API with declarable metric, and also an implementation of the
* JDisc Metrics API where the newest state is made continously available.
*
* <p>
* Users should have an instance of {@link com.yahoo.metrics.simple.MetricReceiver}
* injected in the constructor where needed, then declare metrics as instances
* of {@link com.yahoo.metrics.simple.Counter} and
* {@link com.yahoo.metrics.simple.Gauge} using
* {@link com.yahoo.metrics.simple.MetricReceiver#declareCounter(String)},
* {@link com.yahoo.metrics.simple.MetricReceiver#declareCounter(String, Point)},
* {@link com.yahoo.metrics.simple.MetricReceiver#declareGauge(String)},
* {@link com.yahoo.metrics.simple.MetricReceiver#declareGauge(String, Point)}, or
* {@link com.yahoo.metrics.simple.MetricReceiver#declareGauge(String, java.util.Optional, MetricSettings)}.
* </p>
*
* <p>
* Clients input data through the API in {@link com.yahoo.metrics.simple.MetricReceiver},
* while the internal work is done by {@link com.yahoo.metrics.simple.MetricAggregator}.
* Initialization is done top-down from {@link com.yahoo.metrics.simple.MetricManager}.
* The link between calls to MetricReceiver and MetricAggregator is the role of
* {@link com.yahoo.metrics.simple.MetricUpdater}.
* </p>
*
* @author Steinar Knutsen
*/
@PublicApi
@ExportPackage
package com.yahoo.metrics.simple;
import com.yahoo.api.annotations.PublicApi;
import com.yahoo.osgi.annotation.ExportPackage;
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