org.apache.log4j.varia
Class FallbackErrorHandler

java.lang.Object
  extended byorg.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.

Constructor Summary
FallbackErrorHandler()
           
 
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 primary)
          The appender to which this error handler is attached.
 void setBackupAppender(Appender backup)
          Set the backup appender.
 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.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FallbackErrorHandler

public FallbackErrorHandler()
Method Detail

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

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