Understanding of Max Backup Index in log4j framework

Question

I will introduce to you a simple source example:

#Level
log4j.rootLogger = DEBUG, f

#Appender
log4j.appender.f = org.apache.log4j.RollingFileAppender
log4j.appender.f.File = C:\\Users\\myname\\Desktop\\Test.txt

#File size
log4j.appender.f.MaxFileSize = 100KB
log4j.appender.f.MaxBackupIndex = 1

I understand the working of source and see that the output result will be "logger messages" written in file Test.txt. And when I have reached the max file size of 100KB it will be created new file with name Test.txt.1

My simple issue is can I generate new file to be with name Test1.txt no Test.txt.1

Best regards,
D.Balamjiev

Solution 1

You may want to use a custom FileNamePattern, using %i which is the index of the file :

#Appender
log4j.appender.f = org.apache.log4j.RollingFileAppender
log4j.appender.f.File = C:\\Users\\myname\\Desktop\\Test.txt
log4j.appender.f.rollingPolicy.FileNamePattern=C:\\Users\\myname\\Desktop\\Test%i.txt

Solution 2

That parameter is defining how many files will be kept after deleting from rollback policy:

the official doc states:

maxBackupIndex: Maximum number of backup files to keep.

in your case that will happen every time the loger file reaches the 100KB you defined...

Comments

[Armer B.]

Yes I understand that, but is it possible to manage the output file name?