Package org.apache.log4j.helpers
Class OnlyOnceErrorHandler
- java.lang.Object
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- org.apache.log4j.helpers.OnlyOnceErrorHandler
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- All Implemented Interfaces:
ErrorHandler
,OptionHandler
public class OnlyOnceErrorHandler extends java.lang.Object implements ErrorHandler
TheOnlyOnceErrorHandler
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
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Constructor Summary
Constructors Constructor Description OnlyOnceErrorHandler()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
activateOptions()
No options to activate.void
error(java.lang.String message)
Print a the error message passed as parameter onSystem.err
.void
error(java.lang.String message, java.lang.Exception e, int errorCode)
Prints the message and the stack trace of the exception onSystem.err
.void
error(java.lang.String message, java.lang.Exception e, int errorCode, LoggingEvent event)
Prints the message and the stack trace of the exception onSystem.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.
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Method Detail
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setLogger
public void setLogger(Logger logger)
Does not do anything.- Specified by:
setLogger
in interfaceErrorHandler
- Parameters:
logger
- One of the loggers that will be searched for the failing appender in view of replacement.
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activateOptions
public void activateOptions()
No options to activate.- Specified by:
activateOptions
in interfaceOptionHandler
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error
public void error(java.lang.String message, java.lang.Exception e, int errorCode)
Prints the message and the stack trace of the exception onSystem.err
.- Specified by:
error
in interfaceErrorHandler
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error
public void error(java.lang.String message, java.lang.Exception e, int errorCode, LoggingEvent event)
Prints the message and the stack trace of the exception onSystem.err
.- Specified by:
error
in interfaceErrorHandler
- 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.
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error
public void error(java.lang.String message)
Print a the error message passed as parameter onSystem.err
.- Specified by:
error
in interfaceErrorHandler
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setAppender
public void setAppender(Appender appender)
Does not do anything.- Specified by:
setAppender
in interfaceErrorHandler
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setBackupAppender
public void setBackupAppender(Appender appender)
Does not do anything.- Specified by:
setBackupAppender
in interfaceErrorHandler
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