get UserPrincipal() is null on Tomcat v6.0.33

[Yogesh Shankarappa]

Hello All,


          I am unable to get request.getUserPrincipal() or
request.getRemoteUser() after successful external authentication.
I would greatly appreciate if you could let me know of any configuration on
tomcat server to be looked at to get the user principal.
Below is the implementation details:

I have a sample app deployed on Tomcat v6.0.33. J2EE Policy Agent 3.0.3 is
also installed on the same server. I have configured
to have external authentication using the J2EE agent and accomplished using
OpenAM Enterprise Server. The tomcat container
is protected using this authentication implementation. When I try the sample
app URL, I am redirected to the OpenAM server
where the user is authentication and redirected back to the application.
Using the request object, I am able to get all the user
information like uid, givenname, sn, cn etc. but request.getUserPrincipal()
or request. getRemoteUser() is null.
I tried adding the following code to web.xml either on the application or
tomcat container itself, still I am unable to get the user
principal. I would greatly appreciate if you could let me know of any
configuration I should be looking at on tomcat server.
Thanks in advance.


<filter>
     <filter-name>Agent</filter-name>

<filter-class>com.sun.identity.agents.filter.AmAgentFilter</filter-class>
</filter>
<filter-mapping>
     <filter-name>Agent</filter-name>
     <url-pattern>/*</url-pattern>
     <dispatcher>REQUEST</dispatcher>
     <dispatcher>INCLUDE</dispatcher>
     <dispatcher>FORWARD</dispatcher>
     <dispatcher>ERROR</dispatcher>
</filter-mapping>
<security-constraint>
     <display-name>Example Security Constraint</display-name>
     <web-resource-collection>
          <web-resource-name>Entire Application</web-resource-name>
          <url-pattern>/*</url-pattern>
     </web-resource-collection>
</security-constraint>



Thanks
Yogesh