Can we write trigger on platform events?

Can we write trigger on platform events?

Platform events support only after insert triggers. The after insert trigger event corresponds to the time after a platform event is published. After an event message is published, the after insert trigger is fired. To create a platform event trigger, use the Developer Console.

Are platform events asynchronous?

Unlike triggers on standard or custom objects, triggers on platform events don’t execute in the same Apex transaction as the one that published the event. The trigger runs asynchronously in its own process. As a result, there can be a delay between when an event is published and when the trigger processes the event.

What is a platform event triggered flow?

Each platform event–triggered flow or resumed flow interview runs asynchronously in a separate transaction from the transaction that published the event message. As a result, there can be a delay between when an event message is published and when the subscribed flow or interview evaluates the event message.

How do I know if a platform is an event?

Testing Your Platform Event in Apex

1. Event and Event Bus Properties in Test Context. In test context, event messages and the event bus have different properties.
2. Deliver Test Event Messages. Deliver test event messages after the Test.stopTest() statement.
3. Test Retried Event Messages.

How do I publish a platform event?

Define and Publish Platform Events

1. Define a platform event.
2. Describe how platform event messages can be published.
3. Use an Apex method to publish an event.
4. Publish an event using clicks in a process or flow.
5. Publish an event using REST API by inserting an sObject.

How do you know if a platform event is published or not?

Enable Publish Status Events To enable receiving publish status events for your high-volume platform event, in Setup, click Track publish status on the event’s definition page. Or in Metadata API, set the enablePublishStatusTracking field on CustomObject to true .

How do you publish a platform event?

How do you implement a platform event?

Define a Platform Event

1. From Setup, enter Platform Events in the Quick Find box, then select Platform Events.
2. On the Platform Events page, click New Platform Event.
3. Create a Notification platform event with the following settings: Label: Notification. Plural Label: Notifications. Object Name: Notification.
4. Click Save.

How do I use platform events in Salesforce?

How do I send notifications from a flow in Salesforce?

1. Before you begin, make sure that the custom notification type you want to call from your process exists. If not, create the notification type.
2. To query for the Notification Type ID directly from a flow, add the Get Record element to your flow and filter by API name.
3. To add recipients, define Recipient ID as a resource.

How can I see platform events records?

View Event Subscribers From Setup, enter Platform Events in the Quick Find box, then select Platform Events. Click your event’s name. On the event’s definition page, the Subscriptions related list shows all the active triggers, processes, and platform event–triggered flows that are subscribed to the platform event.

How to activate a platform event in Salesforce?

To learn how to activate it in your production org, see the User Authentication module. From Setup, enter Platform Events in the Quick Find box, then select Platform Events. On the Platform Events page, click New Platform Event. Click Save. On the Notification platform event page, click New in Custom Fields & Relationships.

Why does a platform event trigger run asynchronously?

A platform event trigger runs in its own process asynchronously and isn’t part of the transaction that published the event. As a result, there might be a delay between when an event is published and when the trigger processes the event. Don’t expect the result of the trigger’s execution to be available immediately after event publishing.

How to subscribe to platform event notifications with apex triggers?

Subscribe to Platform Event Notifications with Apex Triggers You’ve probably used Apex triggers before, to perform actions based on database events. With platform events, the process is similar. You simply write an after insert Apex trigger on the event object to subscribe to incoming events.

How to subscribe to a platform event in Heroku?

Subscribe to a platform event via the console app and the lightning:empApi component. Test your work by publishing a platform event via a provided Heroku app. Implement a Chatter Apex trigger that publishes a platform event.