database::monitoring::query_timer Class Reference

RAII timer for measuring query execution time. More...

#include <performance_monitor.h>

Collaboration diagram for database::monitoring::query_timer:

Public Member Functions
	query_timer (const std::string &query, database_types db_type, std::shared_ptr< performance_monitor > monitor)
	Constructor with explicit performance_monitor (recommended)
	~query_timer ()
void	set_rows_affected (size_t rows)
void	set_error (const std::string &error)

Private Attributes
query_metrics	metrics_
std::chrono::steady_clock::time_point	start_time_
std::shared_ptr< performance_monitor >	monitor_

Detailed Description

RAII timer for measuring query execution time.

Definition at line 169 of file performance_monitor.h.

Constructor & Destructor Documentation

query_timer()

database::monitoring::query_timer::query_timer	(	const std::string &	query,
		database_types	db_type,
		std::shared_ptr< performance_monitor >	monitor )

Constructor with explicit performance_monitor (recommended)

Parameters

query	Query string
db_type	Database type
monitor	Performance monitor instance

Since

Sprint 3 (Task 3.2)

Definition at line 24 of file performance_monitor.cpp.

        : start_time_(std::chrono::steady_clock::now())
        , monitor_(std::move(monitor))
    {
        metrics_.query_hash = std::to_string(std::hash<std::string>{}(query));
        metrics_.start_time = start_time_;
        metrics_.db_type = db_type;
        metrics_.success = true; // Assume success unless error is set
    }

References database::monitoring::query_metrics::db_type, metrics_, database::monitoring::query_metrics::query_hash, database::monitoring::query_metrics::start_time, start_time_, and database::monitoring::query_metrics::success.

~query_timer()

database::monitoring::query_timer::~query_timer

(

)

Definition at line 36 of file performance_monitor.cpp.

    {
        metrics_.end_time = std::chrono::steady_clock::now();
        metrics_.execution_time = std::chrono::duration_cast<std::chrono::microseconds>(
            metrics_.end_time - metrics_.start_time);
 
        // Use injected monitor if available
        if (monitor_) {
            monitor_->record_query_metrics(metrics_);
        }
        // Note: If monitor is not injected, metrics are not recorded.
        // Always use query_timer with a performance_monitor instance.
    }

References database::monitoring::query_metrics::end_time, database::monitoring::query_metrics::execution_time, metrics_, monitor_, and database::monitoring::query_metrics::start_time.

Member Function Documentation

set_error()

void database::monitoring::query_timer::set_error

(

const std::string &

error

)

Definition at line 50 of file performance_monitor.cpp.

    {
        metrics_.success = false;
        metrics_.error_message = error;
    }

References database::monitoring::query_metrics::error_message, metrics_, and database::monitoring::query_metrics::success.

Referenced by TEST_F().

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set_rows_affected()

void database::monitoring::query_timer::set_rows_affected ( size_t rows )

inline

Definition at line 185 of file performance_monitor.h.

{ metrics_.rows_affected = rows; }

References metrics_, and database::monitoring::query_metrics::rows_affected.

Referenced by TEST_F().

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Member Data Documentation

metrics_

query_metrics database::monitoring::query_timer::metrics_

private

Definition at line 189 of file performance_monitor.h.

Referenced by query_timer(), set_error(), set_rows_affected(), and ~query_timer().

monitor_

std::shared_ptr<performance_monitor> database::monitoring::query_timer::monitor_

private

Definition at line 191 of file performance_monitor.h.

Referenced by ~query_timer().

start_time_

std::chrono::steady_clock::time_point database::monitoring::query_timer::start_time_

private

Definition at line 190 of file performance_monitor.h.

Referenced by query_timer().

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

• database/monitoring/performance_monitor.h
• database/monitoring/performance_monitor.cpp