seastar::metrics::impl::metric_value Class Reference

Detailed Description

A helper class that used to return metrics value.

Do not use directly

See also

metrics_creation

#include <seastar/core/metrics.hh>

Public Member Functions
data_type	type () const
double	d () const
uint64_t	ui () const
int64_t	i () const
	metric_value (histogram &&h, data_type t=data_type::HISTOGRAM)
	metric_value (const histogram &h, data_type t=data_type::HISTOGRAM)
	metric_value (double d, data_type t)
metric_value &	operator+= (const metric_value &c)
metric_value	operator+ (const metric_value &c)
const histogram &	get_histogram () const
bool	is_empty () const noexcept
	return true if this metric was never used More...

Public Attributes
std::variant< double, histogram >	u
data_type	_type

Member Function Documentation

is_empty()

bool seastar::metrics::impl::metric_value::is_empty ( ) const

inlinenoexcept

return true if this metric was never used

Histograms, Summaries and counters are ever growing by nature, so it is possible to check if they have been used or not.

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The documentation for this class was generated from the following file:

• seastar/core/metrics.hh