Connect to Presto Data through External Services in Salesforce

CData Connect Cloud, enables you to access Presto data from cloud-based applications like the Salesforce console and mobile applications like the Salesforce Mobile App. In this article, you will use CData Connect Cloud to access Presto data through Salesforce External Services.

Connect to Presto from Salesforce

To work with live Presto data in Salesforce Connect, we need to connect to Presto from Connect Cloud, provide user access to the connection, and create OData endpoints for the Presto data.

(Optional) Add a New Connect Cloud User

As needed, create Users to connect to Presto through Connect Cloud.

1. Navigate to the Users page and click Invite Users
2. Enter the new user's email address and click Send to invite the user
3. You can review and edit users from the Users page

Add a Personal Access Token

If you are connecting from a service, application, platform, or framework that does not support OAuth authentication, you can create a Personal Access Token (PAT) to use for authentication. Best practices would dictate that you create a separate PAT for each service, to maintain granularity of access.

1. Click on your username at the top right of the Connect Cloud app and click User Profile.
2. On the User Profile page, scroll down to the Personal Access Tokens section and click Create PAT.
3. Give your PAT a name and click Create.
4. The personal access token is only visible at creation, so be sure to copy it and store it securely for future use.

Connect to Presto from Connect Cloud

CData Connect Cloud uses a straightforward, point-and-click interface to connect to data sources.

1. Log into Connect Cloud, click Connections and click Add Connection
2. Select "Presto" from the Add Connection panel
3. Enter the necessary authentication properties to connect to Presto.

   Set the Server and Port connection properties to connect, in addition to any authentication properties that may be required.

   To enable TLS/SSL, set UseSSL to true.

   Authenticating with LDAP

   In order to authenticate with LDAP, set the following connection properties:

   • AuthScheme: Set this to LDAP.
   • User: The username being authenticated with in LDAP.
   • Password: The password associated with the User you are authenticating against LDAP with.

   Authenticating with Kerberos

   In order to authenticate with KERBEROS, set the following connection properties:

   • AuthScheme: Set this to KERBEROS.
   • KerberosKDC: The Kerberos Key Distribution Center (KDC) service used to authenticate the user.
   • KerberosRealm: The Kerberos Realm used to authenticate the user with.
   • KerberosSPN: The Service Principal Name for the Kerberos Domain Controller.
   • KerberosKeytabFile: The Keytab file containing your pairs of Kerberos principals and encrypted keys.
   • User: The user who is authenticating to Kerberos.
   • Password: The password used to authenticate to Kerberos.
4. Click Create & Test
5. Navigate to the Permissions tab in the Add Presto Connection page and update the User-based permissions.

Create an OpenAPI File for Presto

After connecting to Presto, create a workspace and virtual dataset for your desired table(s).

1. Navigate to the Virtual Datasets page and click Add to create a new Workspace (or select an existing workspace).
2. Click Add to add new assets to the Workspace.
3. Select the Presto connection (e.g. Presto1) and click Next.
4. Select the table(s) you wish to work with and click Confirm.
5. Configure the Open API options:
   • Set Version to "3.0"
   • Set Convert array types to strings to off
6. Click Download to download the OpenAI JSON file.

With the connection configure and OpenAPI file downloaded, you are ready to connect to Presto data from Salesforce External Services.

Connect to Presto Data as an External Service

Follow the steps below to connect to the OpenAPI produced by Connect Cloud.

1. Log into Salesforce and navigate to Salesforce Setup.
2. Select Platform Tools -> Integrations -> External Services.
3. Click Add an External Service.
4. Click Select an API source from API Specification and click Next.
5. In Provide Registration Details, enter the following:
   • External Service Name — an identifying name for your external service.
   • Description — a description of your external service.
   • Service Schema — select Upload from local.
   • Select a Named Credential — select the named credential you created.
6. Upload the JSON file you downloaded from CData Connect.
7. If the schema validation was successful, click Save & Next.

8. The next step is Select Operations. These operations are all the actions of the connector that are contained in the OpenAPI specification file. The actions include all the functions you need for the table, including list, get, create, update, and delete records. The actions include a description, input parameters, and output parameters.

   The input parameters are appended to the URL, such as $top, $filter, and $orderby. See API Operations for a complete parameter reference. The input parameters are based on OData filtering.

   Select the operations you want to include in the external service.

9. Review the actions for your external service, including the input and output parameters. If you need to change input or output parameters, you need to edit the OpenAPI specification file.
10. Click Finish. Your external service appears in the list of external services for Salesforce and is now available to build flows.

Simplified Access to Presto Data from Cloud Applications

At this point, you have a direct, cloud-to-cloud connection to live Presto data from Salesforce. For more information on gaining simplified access to data from more than 100 SaaS, Big Data, and NoSQL sources in cloud applications like Salesforce, refer to our Connect Cloud page.