#include <userver/utils/statistics/storage.hpp>

Detailed Description

Class describing the request for metrics data.

Metric path and metric name are the same thing. For example for code like

writer["a"]["b"]["c"] = 42;

the metric name is "a.b.c" and in Prometheus format it would be escaped like "a_b_c{} 42".

Note: add_labels should not match labels from Storage, otherwise the returned metrics may not be read by metrics server.

Definition at line 42 of file storage.hpp.

Collaboration diagram for utils::statistics::Request:

Public Types
enum class	PrefixMatch { kNoop , kExact , kStartsWith }
	Enum for different match types of the `prefix` More...

using	AddLabels = std::unordered_map<std::string, std::string>

Public Member Functions
	Request ()=default

Static Public Member Functions
static Request	MakeWithPrefix (const std::string &prefix, AddLabels add_labels={}, std::vector< Label > require_labels={})
	Makes request for metrics whose path starts with the `prefix`.

static Request	MakeWithPath (const std::string &path, AddLabels add_labels={}, std::vector< Label > require_labels={})
	Makes request for metrics whose path is `path`.

Public Attributes
const std::string	prefix {}
	Return metrics whose path matches with this `prefix`

const PrefixMatch	prefix_match_type = PrefixMatch::kNoop
	Match type of the `prefix`

const std::vector< Label >	require_labels {}
	Require those labels in the metric.

const AddLabels	add_labels {}
	Add those labels to each returned metric.

Member Typedef Documentation

◆ AddLabels

using utils::statistics::Request::AddLabels = std::unordered_map<std::string, std::string>

Definition at line 44 of file storage.hpp.

Member Enumeration Documentation

◆ PrefixMatch

enum class utils::statistics::Request::PrefixMatch

strong

Enum for different match types of the prefix

Enumerator
kNoop	Do not match, the `prefix` is empty.
kExact	`prefix` equal to path
kStartsWith	Metric path starts with `prefix`

Definition at line 64 of file storage.hpp.

Constructor & Destructor Documentation

◆ Request()

utils::statistics::Request::Request ( )

default

Default request without parameters. Equivalent to requesting all the metrics without adding or requiring any labels.

Member Data Documentation

◆ add_labels

const AddLabels utils::statistics::Request::add_labels {}

Add those labels to each returned metric.

Definition at line 77 of file storage.hpp.

◆ prefix

const std::string utils::statistics::Request::prefix {}

Return metrics whose path matches with this prefix

Definition at line 61 of file storage.hpp.

◆ prefix_match_type

const PrefixMatch utils::statistics::Request::prefix_match_type = PrefixMatch::kNoop

Match type of the prefix

Definition at line 71 of file storage.hpp.

◆ require_labels

const std::vector<Label> utils::statistics::Request::require_labels {}

Require those labels in the metric.

Definition at line 74 of file storage.hpp.

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

userver/utils/statistics/storage.hpp