Which event handler of the first aggregate can be used to refresh the query of the second aggregate?

The On After Fetch event handler is used to execute actions right after an aggregate fetches its data. This timing is significant because it ensures that any necessary updates can be made immediately after the data is available to the application.

If you want to refresh the query of a second aggregate based on the data retrieved by the first aggregate, the On After Fetch event of the first aggregate is the perfect moment to trigger that refresh. At this point, the application has the most recent data from the first aggregate, enabling you to appropriately update the second aggregate.

Utilizing this event handler to refresh related data ensures that the application remains efficient and reflects the latest information without unnecessary delays, providing a smooth user experience.