Method Details

• generateNewCookie

  public static jakarta.servlet.http.Cookie generateNewCookie(VaadinRequest request)

  Generates a new cookie for counting daily active users within 24 hour time interval.

  Cookie value is formatted as trackingHash$creationTime, with creationTime expressed as number of milliseconds from the epoch of 1970-01-01T00:00:00Z. The cookie creation time is required on subsequent requests to detect active users. By default, the cookie expires after 24 hours.

  Parameters:

  request - http request from browser

  Returns:

  http cookie to be used to count application's end-users daily

• applyEnforcement

  public static void applyEnforcement(VaadinRequest request, Predicate<VaadinRequest> enforceableRequest)

  Potentially applies enforcement to the current request if DAU limit is exceeded.

  If enforcement has to be applied an EnforcementException is thrown.

  Parameters:

  request - the Vaadin request

  enforceableRequest - predicate to check if the request can be blocked or not.

  Throws:

  DauEnforcementException - if request must be blocked because of DAU limit exceeded.