ession (as a <code>javax.servlet.http.HTTPSession</code>). 
  When invoked by the service endpoint within a remote method 
  implementation, the <code>getHttpSession</code> returns the 
  HTTP session associated currently with this method invocation. 
  This method returns <code>null</code> if there is no HTTP 
  session currently active and associated with this service 
  endpoint. An endpoint class should not rely on an active 
  HTTP session being always there; the underlying Jakarta XML RPC
  runtime sy