1.
Salesforce Admin Group, Trichy
Publish and Subscribe Platform
events using Flows

2.
Kadhar Basha J
Salesforce Admin Group, Trichy
Trailblazer Community Group Leader
MST Solutions
Sundaravel J
Salesforce Admin Group, Trichy
Trailblazer Community Group Co-Leader
MST Solutions
Salesforce Admin Group, Trichy

3.
Salesforce Admin Group, Trichy
Speaker
Jeganathan B
MST Solutions

4.
Today’s Agenda
• Introduction
• How to create Platform Events?
• Platform event transactions & Datatypes
• Publish and Subscribe to Platform Events
• Publish and Subscribe using Flows
• Use Cases
• Demo

5.
Introduction
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• Platform event is an Event-Driven architecture and used to connect
and exchange the real-time event data in Salesforce and external apps.
• Platform events are secure and scalable messages that contain data.
• Publishers publish event messages that subscribers receive in real
time.
• One or more Subscribers can listen to the same published event
messages.

6.
Event-driven terminology
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Event
A change in state that is meaningful in a business process
Event message
A message that contains data about the event. Also known as an event notification

7.
Event-driven terminology
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Event producer
The publisher of an event message
Event channel
A stream of events on which an event producer sends event messages and event
consumers read those messages
Event consumer
A subscriber to a channel that receives messages from the channel
Event bus
A communication and storage service that enables event streaming using the publish-
subscribe model. The event bus enables the retrieval of stored event messages at any time
during the retention window

8.
How to create Platform events?
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• A platform event is a special kind of Salesforce entity, similar in
many ways to a Salesforce object.
• An event message is an instance of a platform event, similar to
how a record is an instance of a Salesforce object.
Transaction Control
• Publish After Commit
• Publish immediately

9.
Supported Datatypes
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Datatypes Checkbox Date Date/Time Number Text
Text Area
(Long)

10.
Sobject vs Platform events
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Like a Sobject
• Create in setup
• Allow Custom fields
• Can be inserted declaratively
or through code
• Control Read and Create
Permissions
Not like a Sobject
• Platform Events are
‘definition’ entities
• A record is considered as
message
• Messages are not viewable in
the UI
• Messages can’t be updated or
deleted

11.
Generic Event vs Platform Event
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12.
Publish Platform Events
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After a platform event has been defined in your Salesforce org, publish
event messages from a Salesforce app by using,
Apex
Process
builder
Flow
Salesforce
API’s

13.
Subscribe to Platform Events
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Published event messages can be received by using the following ways,
Apex
trigger
Process
builder
Flow
builder
CometD
clients(EMP
Connector)
Lightning
Component

14.
Considerations
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Platform event is
appended with __e suffix
for API name of the event
Can't query Platform
events through SOQL or
SOSL
Can't use Platform
events in the reports,
list views, and search.
Platform events don’t
have an associated tab
Published platform
events can’t be rolled
back
All platform event fields
are read-only by default
Only after insert
Triggers are supported
Platform events
accessible through API
and declaratively

15.
Inside Salesforce
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Use Cases
• To avoid Mixed DML Exception(Setup and non-setup objects)
• Delete the uploaded file as a site guest user(Using record Id)
• Collect the input from user through Community

16.
Publish using Flow
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• Use flows to publish event messages from a Salesforce app as part of
some user interaction, an automated process, or workflow action.
• Publish using Create record element in flows.

17.
Publish using Screen Flow
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18.
Subscribe using Flow
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• Subscribed flows and interviews can receive event messages published
through Apex, APIs, flows, and other processes.
• Flow type: Platform event–triggered flow
• Use field values from the platform event messages by referencing the
$Record global variable ($Record.FieldApiName)

19.
Subscribe using Platform-event triggered Flow
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20.
Launch
DEMO

21.
Publish through Salesforce API’s
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Workbench
REST endpoint
/services/data/v51.0/sobjects/Event_Name__e
Request body for a POST request
{
"fieldname" : "value"
}

22.
Any
Questions
so
far