Using RAP to build Side-by-Side extensions

[skopp]

Hi everybody,

is there any way to build a Side-by-Side Extension in RAP on BTP without using an unmanaged scenario when reading from an on premise system? Can't seem to find anything about it. 

I hope there is an easier way to consume the APIs and to re-use their functionality.

What is the benefit when I have to implement the whole logic of the business object again on BTP?

[Margit_Wagner]

Hi @skopp,

We have received your request and are in the process of evaluating the problem: our expert who will analyses the problem and revert to you

Please allow for a delay in our response.
Kind regards
Margit
 

[ChristianR · Accepted solution]

Hello Skopp!

Yes, there is a way to do this:

After you have your OData scenario ready in on-premise in BTP you need to create

• a Service Consumption Model
• a Custom Entity with a Query Implementation Class

Here are 2 graphics to emphasize this:

 

For more information you might want to visit class S4D425 "Adaptations to SAP S/4HANA".

Best regards
Christian

[skopp]

That is exactly what I did.

But that's what I meant with implementing it all again (in this case in the Query Implementation Class).

This works of course, but I have to take care of data retrieval, update, creation, validation and so on again and can't reuse the business object logic (which is already implemented in the on-prem system).

[ChristianR]

I would disagree. I do not see why you have to redo everything again. You can expose actions, validations, determinations and reuse them.

[skopp]

That would be great. Is there any documentation or tutorial, mission etc. about it? I can't seem to find anything that explains the process.

[Arjun_Mukherjee]

Hello ,

Yes this is possible by buidng CDS view on you On-premise system and then exposing them via O data services, In BTP thsi o data services could be leveraged and used to create KPI's for reporting 

[Jaman]

if i build a custom cds view in on-premise system, is it not considered as affecting the core?

[ChristianR]

No, your custom CDS view will be clearly separated from the Core.