version_conflict_exception Class Reference

Exception thrown when an optimistic locking version conflict occurs. More...

#include <version_conflict_exception.hpp>

Inherits exception, and exception.

Collaboration diagram for version_conflict_exception:

Public Member Functions
	version_conflict_exception (std::string_view entity_type, std::string_view entity_id, int expected_version, int actual_version)
	Constructs a version conflict exception with detailed information.
	version_conflict_exception (std::string_view message="")
	Constructs a version conflict exception with a custom message.
const char *	what () const noexcept override
const std::optional< std::string > &	entity_type () const noexcept
const std::optional< std::string > &	entity_id () const noexcept
std::optional< int >	expected_version () const noexcept
std::optional< int >	actual_version () const noexcept

Detailed Description

Exception thrown when an optimistic locking version conflict occurs.

This exception indicates that an entity update failed because the version provided by the client does not match the current version in the database. This typically happens when another client has modified the entity between the time it was read and the time the update was attempted.

Constructor & Destructor Documentation

version_conflict_exception() [1/2]

version_conflict_exception	(	std::string_view	entity_type,
		std::string_view	entity_id,
		int	expected_version,
		int	actual_version
	)

Constructs a version conflict exception with detailed information.

Parameters

entity_type	The type of entity that had the version conflict
entity_id	The identifier of the entity
expected_version	The version the client expected (sent with update)
actual_version	The current version in the database

version_conflict_exception() [2/2]

version_conflict_exception ( std::string_view  message = "" )

explicit

Constructs a version conflict exception with a custom message.

When using this constructor, entity_type, entity_id, expected_version, and actual_version will be std::nullopt, indicating that this detailed information is not available.