Deploying Fiori application on S4 side on premise edition from BAS

[aczeitnerBW]

Dear Specs ! 

I 've an S4 System with Embedded BW in it. I've been asked to create a fiori application that can launch process chain from the fiori . 

I 've never been built this kind of application before so I've started some search and I've got a little confusion. 

Can somehow Fiori application been deployed S4 side so I can call Function modules directly or only Odata calls are working ?

Could you give me some guidance on how to make the first steps ?  Calling directly the function modules, deploying the app directly upon S4 on premise system ? 

Sorry I mainly see solutions that covers scenario for cloud but for me this is not the case I would like to use Fiori as I would use a dynpro program calling FM-s directly not calling HTTP requests if it is possible.

[ArunJacob · Accepted solution]

yes OData is mandatory.

via SEGW or using RAP

in SEGW->Call function best option I believe to consume RFC as is...

METHOD userdetail_get_entity.

  DATA: ls_userdetails TYPE bapiaddr3,
        lt_return     TYPE TABLE OF bapiret2.

  DATA: lv_username TYPE sy-uname.

  " Get input from request
  io_tech_request_context->get_converted_keys( IMPORTING es_key_values = DATA(ls_keys) ).
  lv_username = ls_keys-username.

  CALL FUNCTION 'BAPI_USER_GET_DETAIL'
    EXPORTING
      username = lv_username
    IMPORTING
      address  = ls_userdetails
    TABLES
      return   = lt_return.

  " Map to entity structure
  er_entity = VALUE #( 
    username  = lv_username
    firstname = ls_userdetails-firstname
    lastname  = ls_userdetails-lastname
    email     = ls_userdetails-e_mail
  ).

ENDMETHOD.

thanks

[junwu]

looks like you have no idea about odata service

ui5 call odata service, which in turn can call function module in the odata service implementation.

[aczeitnerBW]

Hello Junwu. Yes I saw that is the main approach (that is why I've included it in my questions) but I am curious if there are any approach that does not require me to create Odata services on the backend. For example with CDS view I able to create reports at fiori side without creating odata service myself. I am hoping to find a standard solution that handles these calls instead of me .

[junwu]

no, fiori only call odata( or web service), if your bw query is consumed directly, it is through InA, and the frontend is webdynpro, not fiori.