code: @Override
      public void sessionCreated(HttpSessionEvent event) {
  
          if (tc.isDebugEnabled()) {
              Tr.debug(tc, "HttpSession created: HttpSession ID: " + event.getSession().getId());
          }
          // nothing to do here, since later the code will add the session id to a map 
  
      }
docs: /*
  (non-Javadoc)
  
  @see javax.servlet.http.HttpSessionListener#sessionCreated(javax.servlet.http.HttpSessionEvent)