Calling the Sales Order (A2X) OData V4 API from BTP Using a Service Consumption Model

Walks through calling SAP S/4HANA Cloud Public EditionSAP S/4HANA Cloud Public Editionoutside the atlasSAP's cloud ERP, run by SAP as software as a service. For the things here it is the business system a side-by-side application on BTP reads from and writes to over its published OData APIs.'s Sales Order (A2X) OData V4 API from an ABAP class on SAP BTP ABAP environmentSAP BTP ABAP environmentserviceSAP's ABAP runtime on BTP: ABAP systems developed in the ABAP Cloud model on SAP HANA Cloud, for cloud apps, OData services and side-by-side extensions of SAP S/4HANA.sap official, btp: a communication arrangement on each side, a Service Consumption Model built in ADT from the API's downloaded EDMX, and a client proxy wired through cl_http_destination_provider=>create_by_comm_arrangement and cl_web_http_client_manager=>create_by_http_destination, the same HTTP clientsHTTP clientscapabilityCalling an HTTP API outside the system from application code, with the request, the credential and the response handled by a client each time the call is made. Serving HTTP is the other direction, and where the address and the credential are kept is destinations.SAP and community, unassessed pattern for ABAP for Cloud Development. The sample class creates a deep sales order with an item, a text, a partner and a pricing element, reads it back, then updates a field guarded by its ETag.