Class OnlyOnceErrorHandler

java.lang.Object
org.apache.log4j.helpers.OnlyOnceErrorHandler
All Implemented Interfaces:
ErrorHandler, OptionHandler

public class OnlyOnceErrorHandler extends 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.

Since:
0.9.0
Author:
Ceki Gülcü
  • Constructor Details

    • OnlyOnceErrorHandler

      public OnlyOnceErrorHandler()
  • Method Details

    • setLogger

      public void setLogger(Logger logger)
      Does not do anything.
      Specified by:
      setLogger in interface ErrorHandler
      Parameters:
      logger - One of the loggers that will be searched for the failing appender in view of replacement.
    • activateOptions

      public void activateOptions()
      No options to activate.
      Specified by:
      activateOptions in interface OptionHandler
    • 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
      Parameters:
      message - The message assoicated with the error.
      e - The Exption that was thrown when the error occured.
      errorCode - The error code associated with the error.
      event - The logging event that the failing appender is asked to log.
    • error

      public void error(String message)
      Print a the error message passed as parameter 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