CapGCPCdsService.md

CDS-SCP-API CAP Examples

Prerequisites

Before you can start this example, you need to setup your environment in Google Cloud Platform and the SAP Cloud Platform Destination services as written on this page.

Userlist from Google Cloud Platform Directory Service as CAP CDS External Service

• Create a new folder and enter the new folder

  mkdir <cds-gcp-example-folder>
  cd <cds-gcp-example-folder>
  

• Initialize as CAP CDS project

  cds init
  

• Add cds-scp-api dependencies in the package.json file

  "dependencies": {
    ...
    "@sapmentors/cds-scp-api": "latest"
   },

• install the node packages by running

  npm install
  

• add a file named gcp-user-service.cds with the following cds definition in the srv folder

  @impl:'gcp-user-service.js'
  @cds.query.limit: 100
  service GCPService @(requires:'any'){
    
    @cds.persistence.skip
    entity User {
      key email   : String;
      username    : String;
      displayName : String;
      givenName   : String;
      surname     : String;
      isGoogleDirectory:Boolean;
      } 
  }

• add a file named gcp-user-service.js with the following cds definition in the srv folder.

  const cdsapi = require("@sapmentors/cds-scp-api");
  const readFunction = async (req) => {
      console.log(req.user);
  
      var destination = 'GCP_API'
      const domain = '<your registered domain>'  
      const url = `/admin/directory/v1/users?domain=${domain}`
      const service = await cdsapi.connect.to(destination);
      console.log(service)
    const gcpUser = await service.run({
      url: url
    }).catch(error => {
          console.log(error)
      })
  
      let users = []
      users = gcpUser.users.map(gcpUser => {
          var user = {};
          user.gcp_id = gcpUser.id;
          user.username = gcpUser.primaryEmail;
          user.displayName = gcpUser.name.fullName;
          user.givenName = gcpUser.name.givenName;
          user.surname = gcpUser.name.familyName;
          user.isGoogleDirectory = true;
          return user;
      });
      return users;
  };
  
  module.exports = (srv) => {
      console.log(srv);
      srv.on('READ', 'User', readFunction);
  };

  Remark: Replace the in the code with your own registered domain in Google Cloud

• create a default-env.json file as described in the prerequisites for running examples locally

• Start CDS watch and open localhost:4004 in your browser

  cds watch
  

  

• Click on User to see the data from Google