org.apache.log4j.helpers

Class OnlyOnceErrorHandler

Implemented Interfaces:
ErrorHandler, OptionHandler

public class OnlyOnceErrorHandler
extends java.lang.Object
implements ErrorHandler

The OnlyOnceErrorHandler implements log4j's default error handling policy which consists of emitting a message for the first error in an appender and ignoring all following errors.

The error message is printed on System.err.

This policy aims at protecting an otherwise working application from being flooded with error messages when logging fails.

Author:
Ceki Gülcü

Since:
0.9.0

Method Summary

void
activateOptions()
No options to activate.
void
error(String message)
Print a the error message passed as parameter on System.err.
void
error(String message, Exception e, int errorCode)
Prints the message and the stack trace of the exception on System.err.
void
error(String message, Exception e, int errorCode, LoggingEvent event)
Prints the message and the stack trace of the exception on System.err.
void
setAppender(Appender appender)
Does not do anything.
void
setBackupAppender(Appender appender)
Does not do anything.
void
setLogger(Logger logger)
Does not do anything.

Method Details

activateOptions

public void activateOptions()
No options to activate.
Specified by:
activateOptions in interface OptionHandler


error

public void error(String message)
Print a the error message passed as parameter on System.err.
Specified by:
error in interface ErrorHandler


error

public void error(String message,
                  Exception e,
                  int errorCode)
Prints the message and the stack trace of the exception on System.err.
Specified by:
error in interface ErrorHandler


error

public void error(String message,
                  Exception e,
                  int errorCode,
                  LoggingEvent event)
Prints the message and the stack trace of the exception on System.err.
Specified by:
error in interface ErrorHandler


setAppender

public void setAppender(Appender appender)
Does not do anything.
Specified by:
setAppender in interface ErrorHandler


setBackupAppender

public void setBackupAppender(Appender appender)
Does not do anything.
Specified by:
setBackupAppender in interface ErrorHandler


setLogger

public void setLogger(Logger logger)
Does not do anything.
Specified by:
setLogger in interface ErrorHandler


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