Updating time interval dynamically in Tumbling window

[ankit-4129]

Hi,
I want to update interval in Tumbling window at runtime without loosing any aggregated data.
I can think of two ways to do this:

1. By updating the existing rule, but this approach results in loosing previous aggregated data. (Is there a way I can update the tumbling-window-rule with new interval once it has generated the event, so that I don't loose any data.)

2. By having a tumbling-window-rule with SQL which gets interval from a table, and once the interval in table is updated this rule updates itself.

I am not sure if this will work, is there a better way to achieve this?