gwt events

Hi, I'm new to gwt and not quite sure how to do something.  We have a page that has a listgrid populated with data from our db.
At some point, there is an external process that runs and "may" update some of the data on the page.  Is there an example I can
use to see how to have whatever is written to the db pushed up to the web client?  the only way I know if is to navigate away from
the page and then come back to see the change take place...

Thanks

JG

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