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# FallbackErrorHandler Class Reference

Inherits ErrorHandler, and ObjectImpl.

List of all members.

## Detailed Description

The `FallbackErrorHandler` implements the ErrorHandler interface such that a secondary appender may be specified.

This secondary appender takes over if the primary appender fails for whatever reason.

The error message is printed on `System.err`, and logged in the new secondary appender.

## Public Member Functions
| FallbackErrorHandler ()
void | addRef () const
void | releaseRef () const
void | setLogger (const LoggerPtr &logger)
| Adds the logger passed as parameter to the list of loggers that we need to search for in case of appender failure.
void | activateOptions (log4cxx::helpers::Pool &p)
| No options to activate.
void | setOption (const LogString &option, const LogString &value)
| Set `option` to `value`.
void | error (const LogString &message, const std::exception &e, int errorCode) const
| Prints the message and the stack trace of the exception on `System.err`.
void | error (const LogString &message, const std::exception &e, int errorCode, const spi::LoggingEventPtr &event) const
| Prints the message and the stack trace of the exception on `System.err`.
void | error (const LogString &) const
| Print a the error message passed as parameter on `System.err`.
const AppenderPtr & | getBackupAppender () const
| Return the backup appender.
void | setAppender (const AppenderPtr &primary)
| The appender to which this error handler is attached.
void | setBackupAppender (const AppenderPtr &backup)
| Set the backup appender.

## Constructor & Destructor Documentation

FallbackErrorHandler | ( |  | ) |

## Member Function Documentation

void activateOptions | ( | log4cxx::helpers::Pool & | p | ) | `[virtual]`

| No options to activate. Implements OptionHandler.

void addRef | ( |  | ) | const`[virtual]`

| Reimplemented from ObjectImpl.

void error | ( | const LogString & |  | ) | const`[inline, virtual]`

| Print a the error message passed as parameter on `System.err`. Implements ErrorHandler.

void error | ( | const LogString & | message,
|  | const std::exception & | e,
|  | int | errorCode,
|  | const spi::LoggingEventPtr & | event
| ) | const`[virtual]`

| Prints the message and the stack trace of the exception on `System.err`. Implements ErrorHandler.

void error | ( | const LogString & | message,
|  | const std::exception & | e,
|  | int | errorCode
| ) | const`[virtual]`

| Prints the message and the stack trace of the exception on `System.err`. Implements ErrorHandler.

const AppenderPtr& getBackupAppender | ( |  | ) | const`[inline]`

| Return the backup appender.

void releaseRef | ( |  | ) | const`[virtual]`

| Reimplemented from ObjectImpl.

void setAppender | ( | const AppenderPtr & | primary | ) | `[virtual]`

| The appender to which this error handler is attached. Implements ErrorHandler.

void setBackupAppender | ( | const AppenderPtr & | backup | ) | `[virtual]`

| Set the backup appender. Implements ErrorHandler.

void setLogger | ( | const LoggerPtr & | logger | ) | `[virtual]`

| Adds the logger passed as parameter to the list of loggers that we need to search for in case of appender failure. Implements ErrorHandler.

void setOption | ( | const LogString & | option,
|  | const LogString & | value
| ) | `[virtual]`

| Set `option` to `value`. The handling of each option depends on the OptionHandler instance. Some options may become active immediately whereas other may be activated only when activateOptions is called. Implements OptionHandler.

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

- fallbackerrorhandler.h