Enabling role based security in Websphere7
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My web application(created using struts2 ,Contains 2 page 

 - 1)Raise Request
 - 2)Approve Request

) deployed in websphere 7.I need to enable role  based security for this application. I have two Roles

  1)user(who can raise a request)

 

2)Approver

 both having different credentials.I am not using anyback end for authentication. How to do this using websphere security features by web.xml and mapping users.