Class FallbackErrorHandler

java.lang.Object
org.apache.log4j.varia.FallbackErrorHandler
All Implemented Interfaces:
ErrorHandler, OptionHandler

public class FallbackErrorHandler extends Object implements ErrorHandler
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.

Author:
Ceki Gücü
  • Constructor Details

    • FallbackErrorHandler

      public FallbackErrorHandler()
  • Method Details

    • setLogger

      public void setLogger(Logger logger)
      Adds the logger passed as parameter to the list of loggers that we need to search for in case of appender failure.
      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 primary)
      The appender to which this error handler is attached.
      Specified by:
      setAppender in interface ErrorHandler
    • setBackupAppender

      public void setBackupAppender(Appender backup)
      Set the backup appender.
      Specified by:
      setBackupAppender in interface ErrorHandler