How to implement a ProgressBar while persisting into a database

Question

I would like to implement a ProgressBar and ProgressIndicator while persisting into a database, to visualize what has already been persisted, and what is remaining. The problem is that I can't find a way to find the amount of time remaining for the persistence to complete.

ProgressBar pb = new ProgressBar(0.6);
ProgressIndicator pi = new ProgressIndicator(0.6);

How can I determine the amount of time remaining? I just can't seem to find a way to relate it with the database progress.

Answer 1

You can extrapolate. E. g. you performed 3 out of 10 persist operations and that took 3 seconds. Then about 7 seconds left. Of course it is rough approximation.