How to configure log4j to only keep log files for the last seven days?

Question

I have the following logging problem with several Java applications using log4j for logging:

I want log files to be rotated daily, like

Answer 1

There is another option DailyRollingFileAppender. but it lacks the auto delete (keep 7 days log) feature you looking for

sample

log4j.appender.DRF=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DRF.File=example.log
log4j.appender.DRF.DatePattern='.'yyyy-MM-dd

I do come across something call org.apache.log4j.CompositeRollingAppender, which is combine both the features of the RollingFileAppender (maxSizeRollBackups, no. of backup file) and DailyRollingFileAppender (roll by day).

But have not tried that out, seems is not the standard 1.2 branch log4j feature.