pqxx::errorhandler Class Referenceabstract

Base class for error-handler callbacks. More...

#include <errorhandler.hxx>

Inheritance diagram for pqxx::errorhandler:

Public Member Functions

 errorhandler (connection_base &)
virtual ~errorhandler ()
virtual bool operator() (const char msg[]) noexcept=0
 Define in subclass: receive an error or warning message from the database. More...


class internal::gate::errorhandler_connection_base

Detailed Description

Base class for error-handler callbacks.

To receive errors and warnings from a connection, subclass this with your own error-handler functor, and instantiate it for the connection. Destroying the handler un-registers it.

A connection can have multiple error handlers at the same time. When the database connection emits an error or warning message, it passes the message to each error handler, starting with the most recently registered one and progressing towards the oldest one. However an error handler may also instruct the connection not to pass the message to further handlers by returning "false."

Constructor & Destructor Documentation

◆ errorhandler()

pqxx::errorhandler::errorhandler ( connection_base conn)

References errorhandler().

Referenced by errorhandler().

◆ ~errorhandler()

pqxx::errorhandler::~errorhandler ( )

Member Function Documentation

◆ operator()()

virtual bool pqxx::errorhandler::operator() ( const char  msg[])
pure virtualnoexcept

Define in subclass: receive an error or warning message from the database.

Whether the same error message should also be passed to the remaining, older errorhandlers.

Implemented in pqxx::quiet_errorhandler.

Friends And Related Function Documentation

◆ internal::gate::errorhandler_connection_base

friend class internal::gate::errorhandler_connection_base

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