SAP BTP CAP - How to trigger or cancel workflow from Node JS?

[chphaniv]

Hi All,

We are implementing a CAP project, where we are triggering workflow and cancelling workflows from frontend UI. Following this approach we are facing few issues related to security. I believe we can do the same from backend CAP actions. Would appreciate if you can share details or code snippets on how to achieve this. Thanks...

Regards,

Phani.

[Willem_Pardaens]

Hi Phani,

You can interact with SAP Build Process Automation like any other external service in CAP.

You will need:

• A service instance of the "process automation service" in the "standard" plan, and create a Service Key
• A destination pointing to this service instance and using the key details as OAuth2ClientCredentials
• Consuming this destination in CAP:

package.json:

"dependencies": {
  "@sap-cloud-sdk/http-client": "^2.9.0"
},
"cds": {
  "requires": {
    "spa_api": {
      "kind": "rest",
      "credentials":{
        "destination": "YourDestinationName"
      }
    }
  }
}

service.js:

srv.on('YourAction', async (req) => {
    const workflowContent = {
        "definitionId": "eu10.abc.xyz",
        "context": {
            "param1": null,
            "param2": null
        }
    };
    const SPA_API = await cds.connect.to('spa_api');
    const result = await SPA_API.send('POST', '/workflow/rest/v1/workflow-instances', JSON.stringify(workflowContent), { "Content-Type": "application/json" });
    return result;
});

Using the SAP Build Process Automation REST APIs you can trigger any action on the workflow you want.

[darsh2269]

Thanks willem.pardaens

your answer help me to configure destination for rest kind destination in CAP.