Platform Events Developer Guide

Platform Events Developer Guide
Delivering Custom Notifications with Platform Events
Defining Your Custom Platform Event
Publishing Platform Events
Flows
Processes
Apex
Apex Publish Callbacks
Apex Publish Callback Class
Callback Running User and Debug Logs
Create an Event with an EventUuid Field
Invoke the Publish Callback
Publish Callback Best Practices
Example: Publish Callback Class That Creates Follow-Up Tasks for Failed Publishes
Example: Publish Events with a Callback Instance
Example: Publish Callback Class That Creates Follow-Up Tasks for Failed and Successful Publishes
Example: Publish Callback Class That Correlates Callback Results with Event Messages
Test Apex Publish Callbacks
Apex Publish Callback Limits
Salesforce APIs
Pub/Sub API
Subscribing to Platform Events
Testing Your Platform Event in Apex
Encrypting Platform Event Messages at Rest in the Event Bus
Monitor Platform Event Publishing and Delivery Usage
Considerations
Examples
Reference
PDF

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Example: Publish Events with a Callback Instance

To invoke the callback, perform an EventBus.publish call by passing it an instance of the FailureCallback class. You can publish one event or a batch of events with the callback.

This example publishes two event messages. This example requires a platform event, Order Event, to be defined with a Text(18) field of Order Id. To view debug logs for the FailureCallback class, make sure that you set up user trace flags for the Automated Process user. For more information, see Callback Running User and Debug Logs. In this case, if all publishing is successful, the onFailure() method isn’t invoked.