Technical Articles
Consume ABAP RESTful Application Programming Model (RAP) Service in SAP UI5 Application
Hello Everyone
In this blog will see how to consume RAPM (ABAP RESTful Application Programming Model) service in SAP UI5 App through SAP Business Application Studio (BAS).
Step 1: Required SAP Cloud Platform Trial account. Refer below link to create.
https://developers.sap.com/tutorials/hcp-create-trial-account.html
Step 2: Considering we have ABAP RESTful Application Programming Model (RAP) service developed in SAP Cloud Platform ABAP Environment. To create one you can follow OpenSAP course Building Apps with the ABAP RESTful Application Programming Model
Step 3: Create Destination for RAP
| Name | RAPM |
| Type | HTTP |
| Description | ABAP Restful Service |
| URL | Enter the URL of the ABAP system that you copied from the <url> element in the service key |
| ProxyType | Internet |
| Authentication | OAuth2UserTokenExchange |
| Client ID | Enter the content of the <clientID> element that you copied from the service key |
| Client Secret | Enter the content of the <clientsecret> element that you copied from the service key |
| Token Service URL | Enter <uaa-url>/oauth/token, where is the content of the element that you copied from the public key section of the service key https://xxxxx.authentication.eu10.hana.ondemand.com/oauth/token |
| Token Service URL Type | Choose Dedicated |
Step 4: Configure SAP Business Application Studio and create dev by following below links.
https://developers.sap.com/tutorials/appstudio-onboarding.html
https://developers.sap.com/tutorials/appstudio-devspace-fiori-create.html
Step 5: Launch SAP Business Application Studio, use Ctrl+Shift+P to launch command palette and search for Yeoman Generator
Step 6: Select SAP Fiori freestyle SAP UI5 application and click on “Next”.
Step 7: Select SAP Fiori Worklist application and click on “Next”.
Step 8: Choose Connect to an SAP System and click on “Next”.
Step 9: Select RAPM (SCP), which is our destination name, and click on “Next”.
Step 10: Select service ZUI_RAP_TRAVEL_O2_2143, which was developed in ABAP environment, and click on “Next”.
Step 11: Select fields for the floorplan as mentioned below or anything of your choice, and click on “Next”.
Step 12: Provide Project Attributes as shown below and click on “Finish”.
Step 13: Open the project in the New Workspace.
Step 14: We can see the project file in the explorer section as below
Step 15: Right click on the webapp and we can see below popup. Choose Preview Application.
Step 16: Select start as shown below
Step 17: Application will be launched in the New Tab as shown below and click on the Tile “ABAP Env UI5 APP”
Step 18: Finally, we can see our application data loading from ABAP RESTful Application Programming Model (RAP) Service developed in ABAP Environment in SAP Cloud Platform.
Hope you guys like this blog post.
Feel free to comment
Regards,
Sai Nithesh Gajula
Keep going Sai....Great work
Thanks Nanda 🙂
Hi Sai,
I am getting below response when i try to check if destination is working.
Connection to "RAPM" established. Response returned: "302: Redirect"
Also cannot see the services listed in ABAP on Cloud. It says services unavailable.
Can you please help.
Thanks,
Subba
Hi Krishna,
Connection to “RAPM” established. Response returned: “302: Redirect” is an expected message in the destination. Can you please elaborate on the "Also cannot see the services listed in ABAP on Cloud. It says services unavailable." with screenshot.
Regards,
Sai Nithesh Gajula
Hi Sai,
Here's the attachment
. I do now see any services listed in dropdown.Not sure what i am missing.
Services unavailable
Thanks,
Subba
Hi Subba,
Seems like there some issue in accessing destination. Make sure you have added all the additional properties in the destination.
Regards,
Sai Nithesh Gajula
Hello SaiNithesh,
First of all, thank you for your writing. However, I think there are very important problems in reaching RAP with SAPui5. So the situation is not as easy as you say.
Do you have an answer to the following question?
Access RAP CDS behavior implementations (backend), via the Business App.Studio-UI5 (Frontend) button
Thank you
Orhan
Hello SaiNithesh,
The main purpose of accessing RAP via SAPUI5 should be to access and manage CDS Behavior Implementation Classes in RAP, right?
But unfortunately this cannot be done, or I could not find a way. Do you know about this?
Access RAP CDS behavior implementations (backend), via the Business App.Studio-UI5 (Frontend) button
Thank you
Orhan
Hi Orhan Er,
I have gone through your query in the link and understand you want to create custom UI5 app and use the RAP service and add any any action button of your choice. To perform the CRUD, you have to add OData calls manually from UI5 app to perform any create, update and delete action.
Also there is alternative, you can make use of SAP Flexible Programming Model where you can customize the Fiori Elements Templates easily
Regards,
Sai Nithesh
Hello Sai,
I can access RAP-oData from an empty UI5 project. No problem with that. However, I don't know how to reach the annotation (action-button) in this RAP-oData. Because when I press the button on the UI, I want this button to be able to reach the "Behavior Implementation Class" that I created together with the CDs, as in fiori. But I can't find how to do this? I have also read the SAP Flexible Programming Model topic, but I do not think it is relevant to my position.
If you know this, could you suggest me how to do it please?
Thank you very much in advance.
Kind regards
Orhan