Conditionally send a standard event from SAP S/4HANA Cloud, Public Cloud to BTP Event Mesh

[SumitKundu]

Hello Experts,

I am exploring the event mesh functionality on BTP Cloud Integration Suite. My scenarios is when a sales order item delivery date is changed, I need to send an event to BTP Event Mesh. I know standard event topic 'sap/s4/beh/salesorder/v1/SalesOrder/ItemChanged/v1' is available but it is sent for any change on sales order item. I think this cannot be achieved with mere filtering by any properties.

Is there any way I can influence the event publish from SAP S/4HANA Cloud to send only in case of change to delivery date if sales order item?

If not, the event consumer has to call s/4hana cloud api to get the sales order detail. In this case how can we know that delivery date has changed and not any other fields?

Best regards,

Sumit

[SumitKundu]

Hi @ajmaradiaga, any thoughts?

[JChristophNolte · Accepted solution]

You cannot.

And I think you should not. That's not how Event-driven Architecture should work. You need to work with what the events give you. What I suggest: You need to store the delivery date on BTP and compare yourself when you get a Changed event. To get the data, you can either read the data with an API call or create a derived event which contains any data you need, e.g. the delivery date. There are problems with putting too much data into the event (DPP/GDPR, security) why you want to use an API call, this is scenario and business-driven.

At this point in time we have no technical access to what has changed - generically that is just not available. Maybe, one time in the distant future, we may look at utilizing Change Documents. Alternatively, you could create a local event handler that processes the event and somehow find out if the date has changed (probably through a local persistency), if you really, really need to make sure to only send changed events.

[SumitKundu · Accepted solution]

Thanks @JChristophNolte for your inputs. I understand the event-driven architecture should not be loaded with too much data. My question was rather in the context of event producer's side, in this case, SAP S/4HANA Public Cloud, if there is any possibility to suppress event publishing conditionally and locally inside S/4HANA. I would also have loved change documents in SAP S/4HANA exposed as API in this case.

[JChristophNolte · Accepted solution]

Hi SumitKundu,

(I think I accidentally "accepted" your reply, so I cannot reply directly ... hope you still receive this.)

To answer your questions: Well, yes. What we have in S/4HANA is outbound filtering. You can filter on data from the payload; this requires (at this point in time) that you extend the event with context parameters. There is a tutorial available:

https://developers.sap.com/tutorials/abap-environment-maintain-filters-outbound-events.html

You can mix that with a derived event to add to the payload whatever you want to filter on - if it is somewhere stored on the database (or rather: accessible through some - released - view). So a change would be hard to filter on, but a simple "SalesOrderType = 1000" is possible.

[ajmaradiaga]

Great question @SumitKundu . Unfortunately, it is not possible at the moment to do "conditional" event publishing in case of a specific field being updated.