refresh order

Vaadin 6 / 7 / 8 Framework Data Binding
1

Hi,
please help me with refreshing Label element.
My algorithm is:

  1. grid.getContainerDataSource().removeAllItems();
  2. label.setValue("getting data from " + ipAddress.getValue() + “…”);
  3. data = snmpWalk.getFDB(ipAddress.getValue(),community); //long run operation 3-10 seconds
  4. grid.setContainerDataSource(new BeanItemContainer<>(FDBentry.class, data));
  5. label.setValue("table from " + ipAddress.getValue());

But when program is runing and refresh Button is pressed I don’t see what label is chaged to “getting data…”
I see small blue progress bar on top of the screen, then result.

2

Hello,

It will never work the way you do it. Vaadin is running your code until the end before refreshing screen. So you always wait 3 to 10 seconds then see final result in your label.
You should use some callbacks.

Some leads :

HTH
Sébastien