RAII transaction guard that rolls back on destruction unless committed. More...

Collaboration diagram for transaction_guard:

Public Member Functions
	transaction_guard (std::shared_ptr< database_manager > mgr)

	~transaction_guard ()

void	commit ()

	transaction_guard (const transaction_guard &)=delete

transaction_guard &	operator= (const transaction_guard &)=delete

Private Attributes
std::shared_ptr< database_manager >	mgr_

bool	committed_

Detailed Description

RAII transaction guard that rolls back on destruction unless committed.

This pattern ensures that transactions are never left dangling even when an exception or early return occurs.

Definition at line 36 of file transaction_management.cpp.

Constructor & Destructor Documentation

◆ transaction_guard() [1/2]

transaction_guard::transaction_guard ( std::shared_ptr< database_manager > mgr )

inlineexplicit

Definition at line 39 of file transaction_management.cpp.

        : mgr_(std::move(mgr)), committed_(false)
    {
        auto result = mgr_->begin_transaction();
        if (!result.is_ok())
        {
            throw std::runtime_error("Failed to begin transaction");
        }
    }

References mgr_.

◆ ~transaction_guard()

transaction_guard::~transaction_guard ( )

inline

Definition at line 49 of file transaction_management.cpp.

    {
        if (!committed_ && mgr_->in_transaction())
        {
            std::cout << "  [guard] Rolling back uncommitted transaction" << std::endl;
            mgr_->rollback_transaction();
        }
    }

References committed_, and mgr_.

◆ transaction_guard() [2/2]

transaction_guard::transaction_guard ( const transaction_guard & )

delete

Member Function Documentation

◆ commit()

void transaction_guard::commit ( )

inline

Definition at line 58 of file transaction_management.cpp.

    {
        auto result = mgr_->commit_transaction();
        if (result.is_ok())
        {
            committed_ = true;
        }
        else
        {
            throw std::runtime_error("Failed to commit transaction");
        }
    }

References committed_, and mgr_.

Referenced by main().

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◆ operator=()

transaction_guard & transaction_guard::operator= ( const transaction_guard & )

delete

Member Data Documentation

◆ committed_

bool transaction_guard::committed_

private

Definition at line 77 of file transaction_management.cpp.

Referenced by commit(), and ~transaction_guard().

◆ mgr_

std::shared_ptr<database_manager> transaction_guard::mgr_