QwScopedConnection Class Reference

A RAII-style scoped database connection. More...

#include <QwDatabase.h>

Collaboration diagram for QwScopedConnection:

Public Member Functions
	QwScopedConnection (QwDatabase *db)
	~QwScopedConnection ()
	QwScopedConnection (const QwScopedConnection &)=delete
QwScopedConnection &	operator= (const QwScopedConnection &)=delete
	QwScopedConnection (QwScopedConnection &&other) noexcept
QwScopedConnection &	operator= (QwScopedConnection &&other) noexcept
QwDatabase *	operator-> ()
const QwDatabase *	operator-> () const
QwDatabase &	operator* ()
const QwDatabase &	operator* () const
bool	IsConnected () const

Private Attributes
QwDatabase *	fDatabase
bool	fConnected

Detailed Description

A RAII-style scoped database connection.

This class provides automatic connection management using RAII principles. The connection is established when the object is created and automatically disconnected when the object goes out of scope.

Definition at line 83 of file QwDatabase.h.

Constructor & Destructor Documentation

QwScopedConnection() [1/3]

QwScopedConnection::QwScopedConnection ( QwDatabase * db )

explicit

Definition at line 28 of file QwDatabase.cc.

    : fDatabase(db), fConnected(false) {
    if (fDatabase) {
        fConnected = fDatabase->Connect();
        if (!fConnected) {
            QwError << "QwScopedConnection: Failed to establish database connection" << QwLog::endl;
        }
    }
}

References QwLog::endl(), fConnected, fDatabase, and QwError.

Referenced by operator=(), operator=(), QwScopedConnection(), and QwScopedConnection().

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~QwScopedConnection()

QwScopedConnection::~QwScopedConnection

(

)

Definition at line 38 of file QwDatabase.cc.

                                        {
    if (fDatabase && fConnected) {
        fDatabase->Disconnect();
        fConnected = false;
    }
}

References fConnected, and fDatabase.

QwScopedConnection() [2/3]

QwScopedConnection::QwScopedConnection ( const QwScopedConnection & )

delete

References QwScopedConnection().

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QwScopedConnection() [3/3]

QwScopedConnection::QwScopedConnection ( QwScopedConnection && other )

noexcept

Definition at line 45 of file QwDatabase.cc.

    : fDatabase(other.fDatabase), fConnected(other.fConnected) {
    other.fDatabase = nullptr;
    other.fConnected = false;
}

References fConnected, fDatabase, and QwScopedConnection().

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Member Function Documentation

IsConnected()

bool QwScopedConnection::IsConnected

(

)

const

Definition at line 69 of file QwDatabase.cc.

                                           {
    return fConnected && fDatabase && fDatabase->Connected();
}

References fConnected, and fDatabase.

operator*() [1/2]

QwDatabase & QwScopedConnection::operator* ( )

inline

Definition at line 103 of file QwDatabase.h.

{ return *fDatabase; }

References fDatabase.

operator*() [2/2]

const QwDatabase & QwScopedConnection::operator* ( ) const

inline

Definition at line 104 of file QwDatabase.h.

{ return *fDatabase; }

References fDatabase.

operator->() [1/2]

QwDatabase * QwScopedConnection::operator-> ( )

inline

Definition at line 101 of file QwDatabase.h.

{ return fDatabase; }

References fDatabase.

operator->() [2/2]

const QwDatabase * QwScopedConnection::operator-> ( ) const

inline

Definition at line 102 of file QwDatabase.h.

{ return fDatabase; }

References fDatabase.

operator=() [1/2]

QwScopedConnection & QwScopedConnection::operator= ( const QwScopedConnection & )

delete

References QwScopedConnection().

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operator=() [2/2]

QwScopedConnection & QwScopedConnection::operator= ( QwScopedConnection && other )

noexcept

Definition at line 51 of file QwDatabase.cc.

                                                                                     {
    if (this != &other) {
        // Clean up current connection
        if (fDatabase && fConnected) {
            fDatabase->Disconnect();
        }
        
        // Move from other
        fDatabase = other.fDatabase;
        fConnected = other.fConnected;
        
        // Clear other
        other.fDatabase = nullptr;
        other.fConnected = false;
    }
    return *this;
}

References fConnected, fDatabase, and QwScopedConnection().

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Field Documentation

fConnected

bool QwScopedConnection::fConnected

private

Definition at line 86 of file QwDatabase.h.

Referenced by IsConnected(), operator=(), QwScopedConnection(), QwScopedConnection(), and ~QwScopedConnection().

fDatabase

QwDatabase* QwScopedConnection::fDatabase

private

Definition at line 85 of file QwDatabase.h.

Referenced by IsConnected(), operator*(), operator*(), operator->(), operator->(), operator=(), QwScopedConnection(), QwScopedConnection(), and ~QwScopedConnection().

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

• QwDatabase.h
• QwDatabase.cc