Differences between org.apache.log4j.RollingFileAppender and org.apache.log4j.rolling.RollingFileAppender

log4j rollingfileappender extras
Fire picture Fire · Aug 23, 2013 · Viewed 7.3k times · Source

Can someone tell what are different between this things? Moreover, I can't understand, why needs use TimeBasedRollingPolicy if DailyRollingFileAppender exists ?

Answer

amcintosh picture amcintosh · Aug 23, 2013

org.apache.log4j.RollingFileAppender is used to roll files when they reach a defined size.

org.apache.log4j.rolling.RollingFileAppender is a more generic and configurable rolling appender that allows for different rolling and triggering policies.

From the org.apache.log4j.RollingFileAppender documentation:

RollingFileAppender extends FileAppender to backup the log files when they reach a certain size. The log4j extras companion includes alternatives which should be considered for new deployments and which are discussed in the documentation for org.apache.log4j.rolling.RollingFileAppender.

And the org.apache.log4j.rolling.RollingFileAppender documentation:

RollingFileAppender extends FileAppender to backup the log files depending on RollingPolicy and TriggeringPolicy.

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