You can trigger the Send Bulk SMS by Template Apex Action via Marketing Cloud Journey. Although the Journey Builder triggers the Flow one person at a time, Salesforce’s Flow engine automatically bulkifies the requests. If 100 people enter the journey step simultaneously, Salesforce will group them and call your MercuryBulkSMSAction.cls once with a list of 100 FlowInput records - ensuring you don’t hit governor limits.
Trigger Send Bulk SMS by Template Apex Action
As MercuryBulkSMSAction expects a List of Record IDs, your Flow needs to handle the conversion from the single Record ID (passed by Journey Builder) to a List. To do this:
- Create a New Flow and select Autolaunched Flow (No Trigger).
- Create Variables:
- recordID (Text, Available for input): Receives the Contact/Lead ID from Marketing Cloud.
- templateID (Text, Available for input): Receives the SMS Template ID.
- recordIDCollection (Text, Allow multiple values/Collection): To satisfy the Apex input requirement.
- Add Assignment element by adding recordID to recordIDCollection.
- Add Action element by searching for Send Bulk SMS by Template (the label for MercuryBulkSMSAction).
- Set Input values:
- Record IDs: {!recordIDCollection}
- SMS Template ID: {!templateId}
- Save and Activate the Flow.
In Marketing Cloud, you’ll also need to configure Journey Builder. To do this:
- Open your journey in Journey Builder.
- Drag the Salesforce Flow activity onto the canvas - this requires the Marketing Cloud Connect integration.
- Select the Flow you just created.
- Map the variables:
- Map the Salesforce Contact/Lead ID to the recordID flow variable.
- Pass the specific SMS Template ID string to the templateId flow variable.