title: Log4J Log Rotation
body: <p>We have a business requirement to keep last 7 days log
  Can we use log4j to delete old 7 days log.</p>
  
  <p>We are using</p>
  
  <pre><code>log4j.appender.stdout=org.apache.log4j.RollingFileAppender
  </code></pre>
  
  <p>Please let me know. </p>