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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.metrics.simple;
import com.yahoo.api.annotations.Beta;
import com.yahoo.metrics.simple.UntypedMetric.AssumedType;
/**
* A counter metric. Create a counter by declaring it with
* {@link MetricReceiver#declareCounter(String)} or
* {@link MetricReceiver#declareCounter(String, Point)}.
*
* @author steinar
*/
@Beta
public class Counter {
private final Point defaultPosition;
private final String name;
private final MetricReceiver metricReceiver;
Counter(String name, Point defaultPosition, MetricReceiver receiver) {
this.name = name;
this.defaultPosition = defaultPosition;
this.metricReceiver = receiver;
}
/**
* Increase the dimension-less/zero-point value of this counter by 1.
*/
public void add() {
add(1L, defaultPosition);
}
/**
* Add to the dimension-less/zero-point value of this counter.
*
* @param n the amount by which to increase this counter
*/
public void add(long n) {
add(n, defaultPosition);
}
/**
* Increase this metric at the given point by 1.
*
* @param p the point in the metric space at which to increase this metric by 1
*/
public void add(Point p) {
add(1L, p);
}
/**
* Add to this metric at the given point.
*
* @param n
* the amount by which to increase this counter
* @param p
* the point in the metric space at which to add to the metric
*/
public void add(long n, Point p) {
metricReceiver.update(new Sample(new Measurement(n), new Identifier(name, p), AssumedType.COUNTER));
}
/**
* Create a PointBuilder with default dimension values as given when this
* counter was declared.
*
* @return a PointBuilder reflecting the default dimension values of this
* counter
*/
public PointBuilder builder() {
return new PointBuilder(defaultPosition);
}
}
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