Integrate SAP BTP, ABAP environment and SAP S/4HANA Cloud, public edition using Basic Authentication

Create a communication user in SAP S/4HANA Cloud, public edition. This technical user will be used for the inbound connectivity of SAP S/4HANA Cloud, public edition and outbound connectivity of the SAP BTP, ABAP environment.

1. Open the SAP Fiori Launchpad of the customizing tenant (100) of your SAP S/4HANA Cloud, public edition development system.

2. Access the Maintain Communication Users app

3. Choose button New

4. Provide User Name ZBPA2X_COM_USER and Description Communication User to create Business Partners

5. Choose button Propose Password

6. Store proposed password for later use.

   

7. Choose button Create

Create a communication system in SAP S/4HANA Cloud, public edition. This is used to model the external communication partner and to specify the authentication methods and users which are allowed.

1. Access the Communication Systems app

2. Choose button New

3. Provide System ID ZBPA2X_COM_SYS and System Name ZBPA2X_COM_SYS

   

4. Choose button Create

5. In the Section General tab provide the following information:
   

   1. Logical System: ZBPA2X
      
   2. Business System: ZBPA2X
      
   3. Choose Inbound Only
      

6. In the Users for Inbound Communication tab provide the following information:
   

   1. Choose + to add an Inbound User
      
   2. Choose Authentication Method: User Name and Password
      
   3. Provide User Name / Client ID: ZBPA2X_COM_USER
      
   4. Choose button OK
      

   5. The result is that the user created in the previous step is now added as inbound communication user
      

7. Choose Save to save the communication system.

Create a communication arrangement based on the communication scenario SAP_COM_0008 in SAP S/4HANA Cloud, public edition. The Business Partner (A2X) API is part of this standard scenario. You will use the previously created communication system and user, thus defining how to authenticate and authorize against the exposed service.

1. Access the Communication Arrangements app

2. Choose button New

3. Choose Scenario SAP_COM_0008

4. Provide Arrangement Name: ZBPA2X_CA_INBOUND

5. Choose button Create

   

6. On the next screen provide the following information:
   

   1. Communication System: ZBPA2X_COM_SYS. For inbound communication the User Name and Authentication Method is set automatically from the communication system.
      

   2. Store API-URL for later use
      
   3. Deactivate all Outbound Services. Explanation: The outbound services are used to support a different scenario, which is to synchronize business partners between SAP S/4HANA systems via SOAP. This is not done in this tutorial. We are using the service to expose it as an API. ( Business Partner (A2X) ). Example for a deactivated Outbound Service:
      

   4. Choose Save

You can download the metadata of the service also in the communication arrangement. This is helpful in case you extended the API with custom fields. To download the metadata, navigate to Inbound Services and choose Download WSDL/Service Metadata:

Configure the outbound connectivity in SAP BTP, ABAP environment. Create a communication arrangement based on your custom communication scenario, as well as a communication system and an outbound communication user. The communication system will contain the target host of the SAP S/4HANA Cloud, public edition system, while the communication user will need to match the inbound user defined in the target system.

1. Open SAP Fiori Launchpad of your SAP BTP ABAP environment system.

2. Access the Communication Arrangements app

3. Choose button New

4. Choose Scenario ZBPA2X_CS_BUPA created before

5. Provide Arrangement Name: ZBPA2X_CA_OUTBOUND

6. Choose button Create

   

7. Choose button New to create a new Communication System

   

8. Provide:
   

   1. System ID: ZBPA2X_COM_SYS_S4H
      
   2. System Name: ZBPA2X_COM_SYS_S4H
      

9. In the Communication System screen, General section, provide:
   

   1. Host Name: API-URL stored in STEP 3. Remove the https:// from the URL.
      
   2. Business System: ZBPA2X
      

10. In the Users for Outbound Communication section
    

    1. Choose +
       
    2. Provide User Name / Client ID: User created in STEP 1 (ZBPA2X_COM_USER)
       
    3. Provide Password: Password created and stored in STEP 1
       

    4. Choose button Create

11. Choose Save to save the Communication System

12. Verify the Authentication Method is User ID and Password

    

13. Choose Save to save the Communication Arrangement

You have now successfully integrated SAP BTP, ABAP Environment and your SAP S/4HANA Cloud, public edition system using Basic Authentication.

As a developer in SAP BTP, ABAP environment, you can now execute the console application.

1. In ADT, open the project for your SAP BTP ABAP environment system.

2. Navigate to the Console Application ZBPA2X_CL_CLASSRUN

3. Right click on the class and choose Run As > ABAP Application (Console)

4. Note down the Business Partner number that is written to the Console for later use

   

You should now verify that the business partner was successfully created in your SAP S/4HANA Cloud, public edition system.

1. Open the SAP Fiori Launchpad of the customizing tenant (100) of your SAP S/4HANA Cloud, public edition development system.

2. Access the Manage Business Partner Master Data app

3. Enter the previously created Business Partner number in the related field and press enter.

   

4. Display column Created By via the settings button.

   
   

5. Check the data of the created business partner. See that the user was created by the technical communication user, and not by your own business user:

   

You have now verified that the integration of SAP BTP, ABAP environment and your SAP S/4HANA Cloud, public edition system, which uses Basic Authentication as the authentication mechanism, indeed works.

You saw that the business partner was created by the technical communication user, and not by your own business user. In fact, you do not even require a business user in the S/4HANA Cloud system for the remote service call to succeed. The communication user receives the necessary authorization for creating business partners via the communication arrangement for scenario SAP_COM_0008.