public JaccContextValve(JBossWebMetaData wmd,
    CodeSource cs) 
{
       
      this.metaData = wmd;
      this.contextID = metaData.getJaccContextID();
      this.warCS = cs;
      this.trace = log.isTraceEnabled();
}

 public  void invoke(Request request,
    Response response) throws IOException, ServletException 
{
 
      activeCS.set(warCS);
      HttpServletRequest httpRequest = (HttpServletRequest) request.getRequest();
      //Set the customized rolename-principalset mapping in jboss-app.xml
      Map< String, Set< String > > principalToRoleSetMap = metaData.getPrincipalVersusRolesMap();
      SecurityRolesAssociation.setSecurityRoles(principalToRoleSetMap);
      if(trace)
         log.trace("MetaData:"+metaData+":principalToRoleSetMap"+principalToRoleSetMap);  
      try
      {
         // Set the JACC context id
         PolicyContext.setContextID(contextID);
         // Set the JACC HttpServletRequest PolicyContextHandler data
         HttpServletRequestPolicyContextHandler.setRequest(httpRequest);
         if(SecurityAssociationValve.activeRequest.get() == null)
            SecurityAssociationValve.activeRequest.set(request);
         // Perform the request
         getNext().invoke(request, response);
      }
      finally
      {
         SecurityAssociationValve.activeRequest.set(null);
         SecurityAssociationActions.clear();
         activeCS.set(null);
         SecurityRolesAssociation.setSecurityRoles(null);
         HttpServletRequestPolicyContextHandler.setRequest(null); 
      }
}