tachyon

Class Log4jFileAppender

java.lang.Object

org.apache.log4j.AppenderSkeleton

org.apache.log4j.WriterAppender

org.apache.log4j.FileAppender

tachyon.Log4jFileAppender

All Implemented Interfaces:

org.apache.log4j.Appender, org.apache.log4j.spi.OptionHandler

public class Log4jFileAppender
extends org.apache.log4j.FileAppender

Custom log4j appender which preserves old logs on system restart, rolls over logs based on both size and day. Also implements batch deletion of logs when the maximum backup index is reached.

Field Summary

Fields inherited from class org.apache.log4j.FileAppender

bufferedIO, bufferSize, fileAppend, fileName

Fields inherited from class org.apache.log4j.WriterAppender

encoding, immediateFlush, qw

Fields inherited from class org.apache.log4j.AppenderSkeleton

closed, errorHandler, headFilter, layout, name, tailFilter, threshold

Constructor Summary

Constructors

Constructor and Description
Log4jFileAppender()

Method Summary

Methods

Modifier and Type	Method and Description
void	activateOptions() Called when a new log attempt is made, either due to server restart or rollover.
void	setDeletionPercentage(int deletionPercentage)
void	setFile(String fileName, boolean append, boolean bufferedIO, int bufferSize) Creates a LazyFileOutputStream so logs are only created when a message is logged.
void	setMaxBackupIndex(int maxBackups)
void	setMaxFileSize(int maxFileSizeMB)
void	subAppend(org.apache.log4j.spi.LoggingEvent event) Called whenever a new message is logged.

Methods inherited from class org.apache.log4j.FileAppender

closeFile, getAppend, getBufferedIO, getBufferSize, getFile, reset, setAppend, setBufferedIO, setBufferSize, setFile, setQWForFiles

Methods inherited from class org.apache.log4j.WriterAppender

append, checkEntryConditions, close, closeWriter, createWriter, getEncoding, getImmediateFlush, requiresLayout, setEncoding, setErrorHandler, setImmediateFlush, setWriter, shouldFlush, writeFooter, writeHeader

Methods inherited from class org.apache.log4j.AppenderSkeleton

addFilter, clearFilters, doAppend, finalize, getErrorHandler, getFilter, getFirstFilter, getLayout, getName, getThreshold, isAsSevereAsThreshold, setLayout, setName, setThreshold

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Log4jFileAppender

public Log4jFileAppender()

Method Detail

activateOptions

public void activateOptions()

Called when a new log attempt is made, either due to server restart or rollover. The filename is modified to identify the logging node in getNewFileName.

Specified by:

activateOptions in interface org.apache.log4j.spi.OptionHandler

Overrides:

activateOptions in class org.apache.log4j.FileAppender

setDeletionPercentage

public void setDeletionPercentage(int deletionPercentage)

setFile

public void setFile(String fileName,
           boolean append,
           boolean bufferedIO,
           int bufferSize)
             throws IOException

Creates a LazyFileOutputStream so logs are only created when a message is logged.

Overrides:

setFile in class org.apache.log4j.FileAppender

Parameters:

fileName -

append -

bufferedIO -

bufferSize -

Throws:

IOException

setMaxBackupIndex

public void setMaxBackupIndex(int maxBackups)

setMaxFileSize

public void setMaxFileSize(int maxFileSizeMB)

subAppend

public void subAppend(org.apache.log4j.spi.LoggingEvent event)

Called whenever a new message is logged. Checks both the date and size to determine if rollover is necessary.

Overrides:

subAppend in class org.apache.log4j.WriterAppender

Parameters:

event -