Option to trigger business event on po_lines_interface

Hi,

We have a customization on Buyer Work Center page in EBS. Basically, we have a trigger on PO_LINE_INTERFACE for each new insert on it and updating few attributes in it.

Now, we need to achieve the same in Fusion as well. But, we cant create trigger in cloud. We can use business events which fires when PO is created. 

Once business event is fired, we can use rest API to update PO details. But, we can do updates to PO only through Draft Purchase Order (Change Order) APIs.

As part of our functionality, Change Order should not be created before sending the approved PO to the Vendor. If we send the PO to vendor, thats with missing information which we need to do with trigger/business event.