logit::PrometheusLoggerMetrics Class Reference

Tracks log-record counters and builds built-in Prometheus metric families. More...

#include <PrometheusLoggerMetrics.hpp>

Public Member Functions
void	on_log (int64_t timestamp_ms)
	Update metrics when a log record is processed.
void	add_dropped (uint64_t count=1)
	Increment dropped log counter.
void	add_failed_export (uint64_t count=1)
	Increment failed export/collect counter.
uint64_t	log_records_total () const
	Total log records processed.
uint64_t	dropped_count () const
	Total dropped log records.
uint64_t	failed_export_count () const
	Total failed export/collect attempts.
int64_t	last_log_ts () const
	Last log timestamp (ms).
int64_t	time_since_last_log_ms (int64_t now_ms) const
	Milliseconds since last log record (0 if none).
void	build_builtin_metrics (std::vector< PrometheusMetricFamily > &families, const PrometheusTextFormatConfig &config, const std::string &logger_name, int64_t now_ms=0) const
	Append the six built-in metric families to families.

Static Public Member Functions
static int64_t	counter_to_int64 (uint64_t value)
	Safely convert uint64_t counter to int64_t (clamping on overflow).

Static Private Member Functions
static void	add_common_labels (PrometheusSample &sample, const PrometheusTextFormatConfig &config, const std::string &logger_name)

Private Attributes
std::atomic< uint64_t >	m_log_records_total {0}
std::atomic< uint64_t >	m_dropped {0}
std::atomic< uint64_t >	m_failed_exports {0}
std::atomic< int64_t >	m_last_log_ts {0}

Detailed Description

Tracks log-record counters and builds built-in Prometheus metric families.

Definition at line 20 of file PrometheusLoggerMetrics.hpp.

Member Function Documentation

add_common_labels()

static void logit::PrometheusLoggerMetrics::add_common_labels ( PrometheusSample & sample, const PrometheusTextFormatConfig & config, const std::string & logger_name )

inlinestaticprivate

Definition at line 192 of file PrometheusLoggerMetrics.hpp.

add_dropped()

void logit::PrometheusLoggerMetrics::add_dropped ( uint64_t count = 1 )

inline

Increment dropped log counter.

Definition at line 29 of file PrometheusLoggerMetrics.hpp.

add_failed_export()

void logit::PrometheusLoggerMetrics::add_failed_export ( uint64_t count = 1 )

inline

Increment failed export/collect counter.

Definition at line 34 of file PrometheusLoggerMetrics.hpp.

build_builtin_metrics()

void logit::PrometheusLoggerMetrics::build_builtin_metrics ( std::vector< PrometheusMetricFamily > & families, const PrometheusTextFormatConfig & config, const std::string & logger_name, int64_t now_ms = 0 ) const

inline

Append the six built-in metric families to families.

Parameters

families	Destination vector.
config	Format configuration (prefix, labels, build-info flag).
logger_name	Value for the logger label (e.g. "prometheus_payload").
now_ms	Current wall time in milliseconds (from LOGIT_CURRENT_TIMESTAMP_MS()).

Definition at line 73 of file PrometheusLoggerMetrics.hpp.

counter_to_int64()

static int64_t logit::PrometheusLoggerMetrics::counter_to_int64 ( uint64_t value )

inlinestatic

Safely convert uint64_t counter to int64_t (clamping on overflow).

Definition at line 181 of file PrometheusLoggerMetrics.hpp.

dropped_count()

uint64_t logit::PrometheusLoggerMetrics::dropped_count ( ) const

inline

Total dropped log records.

Definition at line 44 of file PrometheusLoggerMetrics.hpp.

failed_export_count()

uint64_t logit::PrometheusLoggerMetrics::failed_export_count ( ) const

inline

Total failed export/collect attempts.

Definition at line 49 of file PrometheusLoggerMetrics.hpp.

last_log_ts()

int64_t logit::PrometheusLoggerMetrics::last_log_ts ( ) const

inline

Last log timestamp (ms).

Definition at line 54 of file PrometheusLoggerMetrics.hpp.

log_records_total()

uint64_t logit::PrometheusLoggerMetrics::log_records_total ( ) const

inline

Total log records processed.

Definition at line 39 of file PrometheusLoggerMetrics.hpp.

on_log()

void logit::PrometheusLoggerMetrics::on_log ( int64_t timestamp_ms )

inline

Update metrics when a log record is processed.

Definition at line 23 of file PrometheusLoggerMetrics.hpp.

time_since_last_log_ms()

int64_t logit::PrometheusLoggerMetrics::time_since_last_log_ms ( int64_t now_ms ) const

inline

Milliseconds since last log record (0 if none).

Parameters

now_ms

Current wall time in milliseconds (from LOGIT_CURRENT_TIMESTAMP_MS()).

Definition at line 60 of file PrometheusLoggerMetrics.hpp.

Member Data Documentation

m_dropped

std::atomic<uint64_t> logit::PrometheusLoggerMetrics::m_dropped {0}

private

Definition at line 188 of file PrometheusLoggerMetrics.hpp.

m_failed_exports

std::atomic<uint64_t> logit::PrometheusLoggerMetrics::m_failed_exports {0}

private

Definition at line 189 of file PrometheusLoggerMetrics.hpp.

m_last_log_ts

std::atomic<int64_t> logit::PrometheusLoggerMetrics::m_last_log_ts {0}

private

Definition at line 190 of file PrometheusLoggerMetrics.hpp.

m_log_records_total

std::atomic<uint64_t> logit::PrometheusLoggerMetrics::m_log_records_total {0}

private

Definition at line 187 of file PrometheusLoggerMetrics.hpp.

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

• include/logit_cpp/logit/loggers/prometheus/PrometheusLoggerMetrics.hpp