tomcat: how can we log user name in tomcat log?

Question

I have tried uncomment the valve line in the server.xml. The uncommented lines are

Answer 1

You have selected the "common" pattern ; you need to specify a custom pattern like the one shown below. The "%u" variable stands for "authenticated user". The link below lists all the other variables you can use.

http://tomcat.apache.org/tomcat-7.0-doc/config/valve.html#Access_Log_Valve

    <Valve className="org.apache.catalina.valves.AccessLogValve"
             directory="logs"  prefix="access." suffix=".log"
             pattern="%h %l %u %t '%r' %s %b"
             resolveHosts="false"/>

Answer 2

<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
       prefix="localhost_access_log." suffix=".txt" pattern="combined" resolveHosts="false"/>

Would that do the trick as well ?