Event grid for event-based architecture

1. Go Serverless using Event Grid to build
applications with event-based architectures
Karthikeyan VK
Karthik_3030@yahoo.com
@karthik3030
https://blogs.karthikeyanvk.in

2. Enter Text
Why Event Grid ?
Allows you to easily build applications with event-based
architectures.
Has built-in support for events coming from Azure services,
like storage blobs and resource groups.
Also has support for your own events, using custom topics.
https://blogs.karthikeyanvk.in

3. Enter Text
Why Event Grid ?
 Provides several capabilities that vastly improve
Serverless, ops automation, and integration work
Also has support for your own events, using custom
topics.
https://blogs.karthikeyanvk.in

4. Enter Text
Why Event Grid ?
 Eliminate polling—and the associated cost and latency. With
Event Grid, event publishers are decoupled from event
subscribers using a pub/sub model and simple HTTP-based event
delivery, allowing you to build scalable Serverless applications,
Microservices and distributed systems.
https://blogs.karthikeyanvk.in

5. Enter Text
What is an Event ?
An event is a lightweight notification of a condition or a state
change.
The publisher of the event has no expectation about how the
event is handled.
 The consumer of the event decides what to do with the
notification. Events can be discrete units or part of a series.
https://blogs.karthikeyanvk.in

6. Enter Text
What is an Event Based Architecture ?
Event-driven architecture, is a software architecture pattern
promoting the production, detection, consumption of, and
reaction to events.
An event can be defined as "a significant change in state"
For example, when a consumer purchases a car, the car's state
changes from "for sale" to "sold"
https://blogs.karthikeyanvk.in

7. Enter Text
What is Event Grid?
https://blogs.karthikeyanvk.in
Azure Event Grid is a fully-managed intelligent event routing
service that allows for uniform event consumption using a
publish-subscribe model.
Use Azure Event Grid to react to relevant events across both
Azure and non-Azure services in near-real time

8. Enter Text
Quick Demo on
Event Grid
https://blogs.karthikeyanvk.in

9. Enter Text
Overview of Event Grid
https://blogs.karthikeyanvk.in

10. Enter Text
What are Topics ?
Event grid topic provides an endpoint where the source sends
events.
Publisher creates the event grid topic, and decides whether an
event source needs one topic or more than one topic.
To respond to certain types of events, subscribers decide which
topics to subscribe to.
https://blogs.karthikeyanvk.in

11. Enter Text
What is an Event Source?
https://blogs.karthikeyanvk.in
An event source is where the event happens. Each event
source is related to one or more event types.
 Your application is the event source for custom events
that you define.

12. Enter Text
What is an Event Source?
https://blogs.karthikeyanvk.in
For example, Azure Storage is the event source for blob
created events. Image upload web page is the event
source for events.
Event sources are responsible for sending events to Event
Grid.

13. Enter Text
What is an Event Subscription?
https://blogs.karthikeyanvk.in
A subscription tells Event Grid which events on a topic
you're interested in receiving.
When creating the subscription, you provide an endpoint
for handling the event.
You can filter the events that are sent to the endpoint.

14. Enter Text
What is an Event Handler?
https://blogs.karthikeyanvk.in
Event handler is the place where the event is sent. The
handler takes some further action to process the event.
 Event Grid supports several handler types. Such as web
hook
You can filter the events that are sent to the endpoint.

15. Enter Text
Quick Demo on Azure
Functions with
Eventgrid
https://blogs.karthikeyanvk.in

16. Enter Text
What is a Custom Topic?
https://blogs.karthikeyanvk.in
Custom topics are application and third-party topics.
When designing your application, you have flexibility to
create topics which satisfies your need.

17. Enter Text
What is a Custom Topic?
https://blogs.karthikeyanvk.in
Azure has an built in Azure Event Grid Topic.
You can send events to custom topic as send your
messages to your queue
You can create multiple custom topic on single endpoint of
the eventgrid.

18. Enter Text
Demo on Azure
Functions with
Event Grid Topic
https://blogs.karthikeyanvk.in

19. Enter Text
References
@karthik3030
• https://docs.microsoft.com/en-us/azure/event-grid/overview
• https://docs.microsoft.com/en-us/azure/storage/blobs/storage-upload-process-
images?tabs=net
• https://docs.microsoft.com/en-us/azure/azure-functions/functions-debug-event-grid-trigger-
local
• https://ngrok.com/download
https://blogs.karthikeyanvk.in

20. Enter Text
@karthik3030
Thank you
/Q&A
https://blogs.karthikeyanvk.in