DatabaseManager Class Reference

Singleton class responsible for managing the connection to the PostgreSQL database. More...

#include <database_manager.h>

Inheritance diagram for DatabaseManager:

Collaboration diagram for DatabaseManager:

Public Member Functions
bool	IsConnected () const
	Checks if the connection to the database was successfully established.

Static Public Member Functions
static DatabaseManager *	GetInstance ()
	Gets the singleton instance of the DatabaseManager.

Private Member Functions
	DatabaseManager (const DatabaseManager &)=delete
	Deleted copy constructor to prevent copying.
	DatabaseManager (QObject *parent=nullptr)
	Private constructor to enforce the singleton pattern. Attempts to establish the connection to the PostgreSQL database using hardcoded credentials. Sets the is_connected_ flag based on the outcome. Checks for the existence of the 'active_wavelengths' table upon successful connection.
DatabaseManager &	operator= (const DatabaseManager &)=delete
	Deleted assignment operator to prevent assignment.
	~DatabaseManager () override=default
	Private destructor. The unique_ptr automatically manages the pqxx::connection lifetime.

Private Attributes
std::unique_ptr< pqxx::connection >	connection_
	Unique pointer managing the pqxx database connection object.
bool	is_connected_
	Flag indicating whether the database connection is currently established.

Detailed Description

Singleton class responsible for managing the connection to the PostgreSQL database.

This class establishes and holds the connection to the external PostgreSQL database using the pqxx library. It provides a method to check the connection status. The connection parameters are hardcoded within the constructor.

Constructor & Destructor Documentation

DatabaseManager() [1/2]

DatabaseManager::DatabaseManager ( QObject * parent = nullptr )

explicitprivate

Private constructor to enforce the singleton pattern. Attempts to establish the connection to the PostgreSQL database using hardcoded credentials. Sets the is_connected_ flag based on the outcome. Checks for the existence of the 'active_wavelengths' table upon successful connection.

Parameters

parent

Optional parent QObject.

Here is the caller graph for this function:

~DatabaseManager()

DatabaseManager::~DatabaseManager ( )

overrideprivatedefault

Private destructor. The unique_ptr automatically manages the pqxx::connection lifetime.

DatabaseManager() [2/2]

DatabaseManager::DatabaseManager ( const DatabaseManager & )

privatedelete

Deleted copy constructor to prevent copying.

Here is the call graph for this function:

Member Function Documentation

GetInstance()

static DatabaseManager * DatabaseManager::GetInstance ( )

inlinestatic

Gets the singleton instance of the DatabaseManager.

Returns

Pointer to the singleton DatabaseManager instance.

Here is the call graph for this function:

IsConnected()

bool DatabaseManager::IsConnected ( ) const

inline

Checks if the connection to the database was successfully established.

Returns

True if connected, false otherwise.

operator=()

DatabaseManager & DatabaseManager::operator= ( const DatabaseManager & )

privatedelete

Deleted assignment operator to prevent assignment.

Here is the call graph for this function:

Member Data Documentation

connection_

std::unique_ptr<pqxx::connection> DatabaseManager::connection_

private

Unique pointer managing the pqxx database connection object.

is_connected_

bool DatabaseManager::is_connected_

private

Flag indicating whether the database connection is currently established.

---

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

• src/storage/database_manager.h
• src/storage/database_manager.cpp