I found answer here, Simplest way to serve static data from outside the application server in a Java web application
it is excellent solution and working fine in my case also.
But my application is deployed on web logic.
I tried to get same file server.xml in like we do have in $cataline/config/server , but i think there must be different file of WebLogic
so, above same setup, i need to do for our application deployed on WebLogic.