How to get the web client uri or IP information in data adapter java service

hi

As the samples in SDK "chassis-app/chassis-service" ,the samples use the "ChassisDataAdapter implements DataProviderAdapter" to get data.

Here I want to get the web client ip information in the provider constructor.

One way I thought out is to use the "_userSessionService",but "_userSessionService.getUserSession()"  return null!

Is there any new way to get the IP?

  public ChassisDataAdapter(UserSessionService userSessionService,VimObjectReferenceService vimObjectReferenceService) {

      _objectRefService = vimObjectReferenceService;

      _userSessionService = userSessionService;

     //Here to get Web client IP info

     createChassis();

  }