Serves Prometheus metrics via an embedded HTTP server. More...

#include <PrometheusHttpServerLogger.hpp>

Inheritance diagram for logit::PrometheusHttpServerLogger:

Classes
struct	Config

Public Types
using	HttpServer = SimpleWeb::Server<SimpleWeb::HTTP>

Public Member Functions
	PrometheusHttpServerLogger ()
	Constructs Prometheus HTTP server logger with default configuration.

	PrometheusHttpServerLogger (const Config &config)
	Constructs Prometheus HTTP server logger with custom configuration.

	~PrometheusHttpServerLogger () override

	PrometheusHttpServerLogger (const PrometheusHttpServerLogger &)=delete

PrometheusHttpServerLogger &	operator= (const PrometheusHttpServerLogger &)=delete

void	start ()
	Starts the HTTP server thread.

void	log (const LogRecord &record, const std::string &message) override
	Updates internal metric counters for a log message.

void	wait () override
	No-op; server is independently serving metrics.

void	shutdown () override
	Stops the HTTP server and joins the server thread.

std::string	collect_payload ()
	Collects current metrics and returns serialized Prometheus text payload.

std::string	get_string_param (const LoggerParam &param) const override
	Retrieves a string parameter from the logger.

int64_t	get_int_param (const LoggerParam &param) const override
	Retrieves an integer parameter from the logger.

double	get_float_param (const LoggerParam &param) const override
	Retrieves a floating-point parameter from the logger.

void	set_log_level (LogLevel level) override
	Sets minimal log level for this logger.

LogLevel	get_log_level () const override
	Gets minimal log level for this logger.

uint64_t	dropped_count () const
	Returns number of dropped records.

uint64_t	failed_export_count () const
	Returns number of failed export attempts.

Public Member Functions inherited from logit::ILogger
virtual	~ILogger ()=default

virtual std::vector< std::string >	get_buffered_strings () const
	Returns buffered formatted messages in chronological order.

virtual std::vector< BufferedLogEntry >	get_buffered_entries () const
	Returns buffered structured entries in chronological order.

virtual std::vector< LogFileInfo >	list_log_files () const
	Lists persisted log files owned by this backend.

virtual LogFileReadResult	read_log_file (const std::string &path) const
	Reads one persisted log file owned by this backend.

virtual std::vector< LogFileReadResult >	read_log_files (const std::vector< std::string > &paths) const
	Reads several persisted log files owned by this backend.

virtual LogClearResult	clear_logs (const LogClearOptions &options=LogClearOptions())
	Clears logger-owned buffered or persisted records when supported.

Private Member Functions
void	build_scrape_metrics (std::vector< PrometheusMetricFamily > &families) const

void	add_scrape_labels (PrometheusSample &sample) const

void	stop ()

Private Attributes
Config	m_config

HttpServer	m_server

std::thread	m_server_thread

std::mutex	m_collect_mutex

std::atomic< bool >	m_running = ATOMIC_VAR_INIT(false)

PrometheusLoggerMetrics	m_metrics

std::atomic< int >	m_log_level = ATOMIC_VAR_INIT(static_cast<int>(LogLevel::LOG_LVL_TRACE))

std::atomic< uint64_t >	m_scrapes_total {0}

std::atomic< uint64_t >	m_scrape_errors_total {0}

std::atomic< int64_t >	m_last_scrape_timestamp_ms {0}

std::atomic< double >	m_last_collect_duration_sec {0.0}

Detailed Description

Serves Prometheus metrics via an embedded HTTP server.

This backend starts a Simple-Web-Server HTTP server and serves Prometheus text exposition format on the configured path (default: /metrics). It tracks the same internal counters and gauges as PrometheusPayloadLogger.

Definition at line 36 of file PrometheusHttpServerLogger.hpp.

Member Typedef Documentation

◆ HttpServer

using logit::PrometheusHttpServerLogger::HttpServer = SimpleWeb::Server<SimpleWeb::HTTP>

Definition at line 38 of file PrometheusHttpServerLogger.hpp.

Constructor & Destructor Documentation

◆ PrometheusHttpServerLogger() [1/3]

logit::PrometheusHttpServerLogger::PrometheusHttpServerLogger ( )

inline

Constructs Prometheus HTTP server logger with default configuration.

Definition at line 52 of file PrometheusHttpServerLogger.hpp.

◆ PrometheusHttpServerLogger() [2/3]

logit::PrometheusHttpServerLogger::PrometheusHttpServerLogger ( const Config & config )

inlineexplicit

Constructs Prometheus HTTP server logger with custom configuration.

Parameters

config Server and format configuration.

Definition at line 56 of file PrometheusHttpServerLogger.hpp.

◆ ~PrometheusHttpServerLogger()

logit::PrometheusHttpServerLogger::~PrometheusHttpServerLogger ( )

inlineoverride

Definition at line 104 of file PrometheusHttpServerLogger.hpp.

◆ PrometheusHttpServerLogger() [3/3]

logit::PrometheusHttpServerLogger::PrometheusHttpServerLogger ( const PrometheusHttpServerLogger & )

delete

Member Function Documentation

◆ add_scrape_labels()

void logit::PrometheusHttpServerLogger::add_scrape_labels ( PrometheusSample & sample ) const

inlineprivate

Definition at line 309 of file PrometheusHttpServerLogger.hpp.

◆ build_scrape_metrics()

void logit::PrometheusHttpServerLogger::build_scrape_metrics ( std::vector< PrometheusMetricFamily > & families ) const

inlineprivate

Definition at line 249 of file PrometheusHttpServerLogger.hpp.

◆ collect_payload()

std::string logit::PrometheusHttpServerLogger::collect_payload ( )

inline

Collects current metrics and returns serialized Prometheus text payload.

Returns: Complete Prometheus text exposition format string.

Definition at line 140 of file PrometheusHttpServerLogger.hpp.

◆ dropped_count()

uint64_t logit::PrometheusHttpServerLogger::dropped_count ( ) const

inline

Returns number of dropped records.

Definition at line 225 of file PrometheusHttpServerLogger.hpp.

◆ failed_export_count()

uint64_t logit::PrometheusHttpServerLogger::failed_export_count ( ) const

inline

Returns number of failed export attempts.

Definition at line 230 of file PrometheusHttpServerLogger.hpp.

◆ get_float_param()

double logit::PrometheusHttpServerLogger::get_float_param ( const LoggerParam & param ) const

inlineoverridevirtual

Retrieves a floating-point parameter from the logger.

Parameters

param Parameter to retrieve.

Returns: Parameter value in seconds for time params, or 0.0 when unsupported.

Implements logit::ILogger.

Definition at line 196 of file PrometheusHttpServerLogger.hpp.

◆ get_int_param()

int64_t logit::PrometheusHttpServerLogger::get_int_param ( const LoggerParam & param ) const

inlineoverridevirtual

Retrieves an integer parameter from the logger.

Parameters

param Parameter to retrieve.

Returns: Parameter value, or 0 when unsupported.

Implements logit::ILogger.

Definition at line 181 of file PrometheusHttpServerLogger.hpp.

◆ get_log_level()

LogLevel logit::PrometheusHttpServerLogger::get_log_level ( ) const

inlineoverridevirtual

Gets minimal log level for this logger.

Returns: Current minimal log level.

Implements logit::ILogger.

Definition at line 220 of file PrometheusHttpServerLogger.hpp.

◆ get_string_param()

std::string logit::PrometheusHttpServerLogger::get_string_param ( const LoggerParam & param ) const

inlineoverridevirtual

Retrieves a string parameter from the logger.

Parameters

param Parameter to retrieve.

Returns: Parameter value, or empty string when unsupported.

Implements logit::ILogger.

Definition at line 166 of file PrometheusHttpServerLogger.hpp.

◆ log()

void logit::PrometheusHttpServerLogger::log	(	const LogRecord &	record,
		const std::string &	message )

inlineoverridevirtual

Updates internal metric counters for a log message.

Parameters

record	Structured log record.
message	Formatted log message (unused by Prometheus metrics).

Implements logit::ILogger.

Definition at line 125 of file PrometheusHttpServerLogger.hpp.

◆ operator=()

PrometheusHttpServerLogger & logit::PrometheusHttpServerLogger::operator= ( const PrometheusHttpServerLogger & )

delete

◆ set_log_level()

void logit::PrometheusHttpServerLogger::set_log_level ( LogLevel level )

inlineoverridevirtual

Sets minimal log level for this logger.

Parameters

level Minimum log level.

Implements logit::ILogger.

Definition at line 214 of file PrometheusHttpServerLogger.hpp.

◆ shutdown()

void logit::PrometheusHttpServerLogger::shutdown ( )

inlineoverridevirtual

Stops the HTTP server and joins the server thread.

Implements logit::ILogger.

Definition at line 134 of file PrometheusHttpServerLogger.hpp.

◆ start()

void logit::PrometheusHttpServerLogger::start ( )

inline

Starts the HTTP server thread.

Definition at line 112 of file PrometheusHttpServerLogger.hpp.

◆ stop()

void logit::PrometheusHttpServerLogger::stop ( )

inlineprivate

Definition at line 322 of file PrometheusHttpServerLogger.hpp.

◆ wait()

void logit::PrometheusHttpServerLogger::wait ( )

inlineoverridevirtual

No-op; server is independently serving metrics.

Implements logit::ILogger.

Definition at line 131 of file PrometheusHttpServerLogger.hpp.

Member Data Documentation

◆ m_collect_mutex

std::mutex logit::PrometheusHttpServerLogger::m_collect_mutex

private

Definition at line 238 of file PrometheusHttpServerLogger.hpp.

◆ m_config

Config logit::PrometheusHttpServerLogger::m_config

private

Definition at line 235 of file PrometheusHttpServerLogger.hpp.

◆ m_last_collect_duration_sec

std::atomic<double> logit::PrometheusHttpServerLogger::m_last_collect_duration_sec {0.0}

private

Definition at line 247 of file PrometheusHttpServerLogger.hpp.

◆ m_last_scrape_timestamp_ms

std::atomic<int64_t> logit::PrometheusHttpServerLogger::m_last_scrape_timestamp_ms {0}

private

Definition at line 246 of file PrometheusHttpServerLogger.hpp.

◆ m_log_level

std::atomic<int> logit::PrometheusHttpServerLogger::m_log_level = ATOMIC_VAR_INIT(static_cast<int>(LogLevel::LOG_LVL_TRACE))

private

Definition at line 242 of file PrometheusHttpServerLogger.hpp.

◆ m_metrics

PrometheusLoggerMetrics logit::PrometheusHttpServerLogger::m_metrics

private

Definition at line 240 of file PrometheusHttpServerLogger.hpp.

◆ m_running

std::atomic<bool> logit::PrometheusHttpServerLogger::m_running = ATOMIC_VAR_INIT(false)

private

Definition at line 239 of file PrometheusHttpServerLogger.hpp.

◆ m_scrape_errors_total

std::atomic<uint64_t> logit::PrometheusHttpServerLogger::m_scrape_errors_total {0}

private

Definition at line 245 of file PrometheusHttpServerLogger.hpp.

◆ m_scrapes_total

std::atomic<uint64_t> logit::PrometheusHttpServerLogger::m_scrapes_total {0}

private

Definition at line 244 of file PrometheusHttpServerLogger.hpp.

◆ m_server

HttpServer logit::PrometheusHttpServerLogger::m_server

private

Definition at line 236 of file PrometheusHttpServerLogger.hpp.

◆ m_server_thread

std::thread logit::PrometheusHttpServerLogger::m_server_thread

private

Definition at line 237 of file PrometheusHttpServerLogger.hpp.

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

include/logit_cpp/logit/loggers/PrometheusHttpServerLogger.hpp

Classes

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ HttpServer

Constructor & Destructor Documentation

◆ PrometheusHttpServerLogger() [1/3]

◆ PrometheusHttpServerLogger() [2/3]

◆ ~PrometheusHttpServerLogger()

◆ PrometheusHttpServerLogger() [3/3]

Member Function Documentation

◆ add_scrape_labels()

◆ build_scrape_metrics()

◆ collect_payload()

◆ dropped_count()

◆ failed_export_count()

◆ get_float_param()

◆ get_int_param()

◆ get_log_level()

◆ get_string_param()

◆ log()

◆ operator=()

◆ set_log_level()

◆ shutdown()

◆ start()

◆ stop()

◆ wait()

Member Data Documentation

◆ m_collect_mutex

◆ m_config

◆ m_last_collect_duration_sec

◆ m_last_scrape_timestamp_ms

◆ m_log_level

◆ m_metrics

◆ m_running

◆ m_scrape_errors_total

◆ m_scrapes_total

◆ m_server

◆ m_server_thread