What is Platform Events?, Subscribe and Publish Platform Event, Consideration of Platform Event, Project of Platform Event

1. Platform
Events
By Arun jain

2. ● Platform Events
● Event Driven Software Architecture
● Platform Event Object
● Platform Event Consideration
● Apex, API, and SOQL Consideration
● Publishing Platform Events
● Subscribing Platform Events
● Limits
● Example
Agenda

3. Platform Events ● Platform events are part of Salesforce’s enterprise
messaging platform
● Platform events are the event messages (or
notifications) that your apps send and receive to take
further action
● Publishers and subscribers communicate with each
other through events

4. Event Driven
Software
Architecture
An event-driven (or message-driven) software
architecture consists of event producers, event
consumers, and channels.
Event Producer
Event Producer
Event Producer
E
V
E
N
T
B
U
S
Event Subscriber
Event Subscriber
Event Subscriber

5. Platform Event
Object
● Platform events are sObjects, similar to
custom objects.
● As custom objects we have __e at last of
platform event.
● ReplayId : System Field to identify the
Events uniquely
● Available in: both Salesforce Classic and
Lightning Experience
● Available in: Performance, Unlimited,
Enterprise, and Developer Editions
● User Permissions needed
○ To Create and Edit the Platform
Events

6. Platform Event
Consideration
● Field-Level Security
● Permanent Deletion of Event Definitions
● Renaming Event Objects
● No Associated Tab
● No Record Page Support in Lightning
App Builder
● Platform Events in Package Uninstall
● No Support in Professional and Group
Editions

7. Apex, API, and
SOQL
Considerations
● Only after insert Triggers Are Supported
● Infinite Trigger Loop and Limits
● Apex DML Limits for Publishing Events
● API Request Limits for Publishing Events
● Replaying Past Events
● Filtered Subscriptions
● No SOQL Support

8. Publishing
Platform Events
● Using Apex
○ Use EventBus.publish()
● Using Processes
○ Add a Create a Record action to the appropriate
process
● Using Flows
○ Add a Record Create or a Fast Create element
to the appropriate flow
● Using Salesforce APIs
○ Creating records of your event in the same way
that you insert sObjects

9. Subscribing to
Platform Events
● Subscribe with Apex Trigger
○ Events can receive in trigger regardlessly how
they have been created.
○ Triggers provide an auto subscription
mechanism
○ No need to explicitly create and listen to a
channel in Apex
● Subscribe with CometD
○ For subscribing to External System
○ Syntax : /event/***<EventName>***__e

10. Limits
Description
Performance
and Unlimited
Editions
Enterprise
Edition
All other
supported
editions
Maximum number of events published per hour
(Events can be published using Apex or APIs.)
100,000 100,000 1,000
Maximum event message size 5 MB
Maximum number of events delivered to CometD clients
within a 24-hour period
50,000 25,000 10,000
Maximum number of platform event definitions that can
be created in an org
100 50 5

11. Thanks Resource :
● https://trailhead.salesforce.com/en/modules/platform_
events_basics
● https://trailhead.salesforce.com/en/projects/workshop
-platform-events/steps/platform-event-subscribe