Publish platform events from an external application

Publish platform events from an external application using Salesforce API

External apps use an API to publish platform event messages. You can publish events by creating records of your event in the same way that you insert sobjects. You can use Salesforce APIs to create platform event records.

Let's look at one example:

Step1: Create a platform Event Object

As you can see in the screenshot I created one PE and added a custom  text field "Account_Name__c"

Step2: Create a trigger on PE object to subscribe to Platform Event 

This after trigger will subscribe to Platform Event and create accounts with the event message name.

Step3: Publish Platform Event

You can use sobject REST endpoint to publish:

/services/data/v48.0/sobjects/Account_Event__e/

Request body for a POST request will be like this :

{

  "Account_Name__c":"New PE Test Account"

}

Like this, you can publish a platform event from outside salesforce and you add your all logic in PE trigger.

Related Post:

• Integrating with Salesforce using Platform Events

References:

• Platform Events Developer Guide

• Trailhead-Platform Events Basics