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// Copyright Yahoo. 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;
/**
* All information needed for creating any extra data structures associated with
* a single metric, outside of its basic type.
*
* @author steinar
*/
@Beta
public final class MetricSettings {
/**
* A builder for the immutable MetricSettings instances.
*/
@Beta
public static final class Builder {
private boolean histogram = false;
/**
* Create a new builder for a MetricSettings instance with default
* settings.
*/
public Builder() {
}
/**
* Set whether a resulting metric should have a histogram. Default is
* false.
*
* @param histogram
* whether to generate a histogram
* @return this, to facilitate chaining
*/
public Builder histogram(boolean histogram) {
this.histogram = histogram;
return this;
}
/**
* Build a fresh MetricSettings instance.
*
* @return a MetricSettings instance containing the values set in this
* builder
*/
public MetricSettings build() {
return new MetricSettings(histogram);
}
}
private final int significantDigits; // could have been static, but would
// just introduce bugs when we must
// expose this setting
private final boolean histogram;
private MetricSettings(boolean histogram) {
this.histogram = histogram;
this.significantDigits = 2;
}
int getSignificantdigits() {
return significantDigits;
}
boolean isHistogram() {
return histogram;
}
}
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