docs: public void sessionDidActivate(ISession session) {
          HttpSession httpsession = (HttpSessionImpl) _adapter.adapt(session);
          HttpSessionEvent event = new HttpSessionEvent(httpsession);
  
          Enumeration enum1 = session.getAttributeNames();
          String attrName;
          Object attr;
          while (enum1.hasMoreElements()) {
              attrName = (String) enum1.nextElement();
              attr = session.getAttribute(attrName);
              if (attr instanceof HttpSessionActivationListener) {
                  ((HttpSessionActivationListener) attr).sessionDidActivate(event);
              }
          }
      }