Question Re: how to trigger handler class read method in RAP OData... in Technology Q&A

how to trigger handler class read method in RAP OData V4 Web API?

Chandra_S — Fri, 06 Feb 2026 04:25:45 GMT

Dear Colleagues,

Good day.

Well, I have a requirement, existing material data coming from third party system to CPI to S/4 HANA MDG and need to create change request and approve it.

So created a RAP service, Table , CDS view , service definition with binding type OData V4 Web API along with behavior definition/implementation In the handler class, defined the methods modify and read. I just want to see if read method is called and data filled. So i would like to know how i can execute/debug the handler class read method.

How can i do the GET call using GW client?

Service URL : /sap/opu/odata4/sap/xxx_xx_xxx_sb/srvd_a2x/sap/xxxx_xx_xxxx_s/0001/

xxx_xx_xxx_sb - Service binding xxxx_xx_xxxx_s - Service definition

regards

Chandra Kishore.

Re: how to trigger handler class read method in RAP OData...

junwu — Fri, 06 Feb 2026 05:45:36 GMT

you choose unmanaged implementation?

READ ENTITIES OF

just write a small program using eml read call to trigger your method.

odata scenario will not go to that method.

Re: how to trigger handler class read method in RAP OData...

Chandra_S — Fri, 06 Feb 2026 06:22:22 GMT

Hi Junwu,

yes using unmanaged implementation.

So ,in handler class i have to define instance method

METHODS get_instance_authorizations FOR INSTANCE AUTHORIZATION

IMPORTING keys REQUEST requested_authorizations FOR cds_view RESULT result

and make call

READ ENTITIES OF cds_view in LOCAL MODE ENTITY cds_view ALL FIELDS WITH CORRESPONDING #( keys ) RESULT DATA(results).?

Also, how can i trigger(breakpoint/debugging) that method?

Re: how to trigger handler class read method in RAP OData...

VigneshMP — Fri, 06 Feb 2026 07:06:28 GMT

Hello,

Direct GET call from Gateway client is usually executed on SQL layer and won't trigger your READ implementation.
Only the EML calls will trigger the READ implementation.

Thanks

Re: how to trigger handler class read method in RAP OData V4 Web API?

adityaIngale66 — Fri, 06 Feb 2026 11:22:36 GMT

you can use consolidation process to create CR using DRF and SOA config.
https://help.sap.com/docs/SAP_S4HANA_ON-PREMISE/6d52de87aa0d4fb6a90924720a5b0549/dbc19b55f22d7b43e10000000a4450e5.html

Re: how to trigger handler class read method in RAP OData...

Chandra_S — Mon, 09 Feb 2026 09:17:18 GMT

Hi Vignesh , I will write the EML call in handler class but how can i trigger the EML call?

Re: how to trigger handler class read method in RAP OData...

junwu — Mon, 09 Feb 2026 13:24:38 GMT

you didn't get the point, write a simple report or a class with code using eml read to read your BO, then your handler will be called.

Re: how to trigger handler class read method in RAP OData...

Chandra_S — Mon, 09 Feb 2026 14:32:48 GMT

Hi Junwu

In my current case, CPI is not sending the material data. CDS view is blank, so I would like to know if

I can pass the payload in S/4 MDG itself and test?

Re: how to trigger handler class read method in RAP OData...

junwu — Mon, 09 Feb 2026 14:48:40 GMT

don't know what you are talking

Re: how to trigger handler class read method in RAP OData...

Chandra_S — Mon, 16 Feb 2026 10:17:18 GMT

I was able to achieve this.

- In behavior handler class implementation , implemented Create method

- In create method , looping through the entities and appending corresponding entity to CDS view and

appending values to the table .

- In behavior saver class implementation, implemented Save method .

- Using GET and POST HTTP method, executed the payload and breakpoint triggered in Eclipse(ADT) and can see the response.

regards

Re: how to trigger handler class read method in RAP OData...

RaminS — Fri, 20 Mar 2026 13:10:01 GMT

@junwu If you really want to help, give him a sample of this program you are suggesting, it can't take more than a minute of your time. If you don't want to help, then don't be rude to him.