Call a released oData service from a RAP BO behavior definition

[rammel_sapdev]

Hi,

Is it possible to call an odata service from a RAP BO action/save to read/update data in case there are no released RAP BO available to achieve clean core?

I have been following the link below and I was able to successfully call the odata service from a console application in ADT. However, whenever I am trying to call it from a RAP BO action, I am getting some errors which I don't know how to interpret.

https://community.sap.com/t5/technology-blogs-by-sap/how-to-use-the-odata-client-proxy-in-sap-s-4-ha...

Error: 

My code:

  METHOD read.
    DATA: lt_bp            TYPE STANDARD TABLE OF zscm_businesspartner=>tys_a_address_email_address_ty,
          lo_client_proxy  TYPE REF TO /iwbep/if_cp_client_proxy,
          lo_read_request  TYPE REF TO /iwbep/if_cp_request_read_list,
          lo_read_response TYPE REF TO /iwbep/if_cp_response_read_lst.
    DATA lv_relative_service_root TYPE string.

    TRY.


        cl_http_client=>create_internal(
          IMPORTING
            client = DATA(lo_http_client)
        ).
        IF sy-subrc <> 0.
          out->write( 'error create by http destination' ).
          EXIT.
        ENDIF.
        lv_relative_service_root = '/sap/opu/odata/sap/API_BUSINESS_PARTNER/'.
        "oData v4 remote proxy
        lo_client_proxy = /iwbep/cl_cp_client_proxy_fact=>create_v2_remote_proxy(
           io_http_client = lo_http_client
           is_proxy_model_key = VALUE #( repository_id       = /iwbep/if_cp_registry_types=>gcs_repository_id-default
                                         proxy_model_id      = to_upper( 'ZSCM_BUSINESSPARTNER' )
                                         proxy_model_version = 0001 )
           iv_relative_service_root = lv_relative_service_root ).

        lo_read_request = lo_client_proxy->create_resource_for_entity_set( 'A_ADDRESS_EMAIL_ADDRESS' )->create_request_for_read( ).
        lo_read_request->set_top( iv_top = 10 ).
        lo_read_response = lo_read_request->execute( ).

        "Retrieve the business data
        lo_read_response->get_business_data( IMPORTING et_business_data = lt_bp ).

        LOOP AT lt_bp INTO DATA(ls_bp).
          out->write( ls_bp ).
        ENDLOOP.
      CATCH /iwbep/cx_cp_remote INTO DATA(lx_cp_remote).
        " Error handling
        out->write( lx_cp_remote->get_longtext( ) ).
      CATCH /iwbep/cx_gateway INTO DATA(lx_gateway).
        " Error Handling
        out->write( lx_gateway->get_longtext( ) ).
    ENDTRY.
  ENDMETHOD.

[saurabh__khare]

You are better off creating a wrapper for a BAPI and releasing it till a released alternative is available

Explaining Extensibility Model Best Practices 

[MioYasutake]

@rammel_sapdev 

A custom entity might be a better fit for your use case. Here’s a link to a developer tutorial.

https://developers.sap.com/tutorials/abap-environment-a4c-create-custom-entity..html

[rammel_sapdev]

Hi, unfortunately, this doesn't suit our requirement. Our requirement is to call an odata service from a custom action to retrieve data.