We have heard a lot about Events and Event Oriented Architecture, but what is it? Come with me in this presentation that I will explain to you.

1. Events, Event-driven
Architecture and
AsyncAPI, what the
fork?

2. Ana Borges
Brazil
API specialist at Sensedia
@PaulaSimiqueli

3. APIs
Industry Recognition
Visionary by
That’s all we do
Organizer of API Experience
One of the largest API-focused event in the
world
1
100 Enterprise customers
+
Presence in LatAm
and Europe
CONSULTING
SERVICES
API
PLATFORM
Strong Performer and Leader by
ABOUT SENSEDIA
Best Current Offering
API Strategy & Delivery Services
2019

4. “By 2020, event-sourced, real-time situational
awareness will be a required characteristic for
80% of digital business solutions, and 80% of
new business ecosystems will require support
for event processing.”
Top 10 Strategic Technology Trends for 2018

5. EVENT
DRIVEN
ARCHITECTURE

6. 1EVENTS
● Event: Every action that generates change of state.
● Business Event: ….
It is an event that has meaning for
the company's activities.
Order from a customer
Bank Payment
Product Change
PRODUCTION DETECTION REACTION

7. 1EVENT-DRIVEN ARCHITECTURE
Event Consumer(s)
MEDIATOR OR BROKER
Event generator(s)
TOPOLOGY

8. 1EVENT-DRIVEN ARCHITECTURE
TOPOLOGY MEDIATOR
Event Processors
EVENT
MEDIATOR
Events
Events Queue
EVENT CHANNEL

9. 1EVENT-DRIVEN ARCHITECTURE
TOPOLOGY MEDIATOR
Customer
Service
Address Change
Event Mediator
Notification
Service
Quotation
Service
Queue

10. 1EVENT-DRIVEN ARCHITECTURE
TOPOLOGY BROKER
Event Processors
EVENT
BROKER
Events

11. 1EVENT-DRIVEN ARCHITECTURE
TOPOLOGY BROKER
Customer
Service
Address Change
Notification
Sevice
Quotation
Service
Quotation
Queue
Notification
Queue

12. 1EVENT-DRIVEN ARCHITECTURE
PRINCIPLES
● It reports current events
● It sends notifications
● It responds immediately
● Communication flows only in one direction
● It is command-free

13. 1EVENT-DRIVEN ARCHITECTURE
● Event Notification;
● Event Carried State Transfer;
● Event Sourcing.
STANDARDS

14. 1EVENT-DRIVEN ARCHITECTURE
STANDARDS EVENT NOTIFICATION
Customer
Service
Address Change
Database
Event Broker
Offers
Service
Banking
service
“Customer X changed
data”
GET /customers/X
● Uncoupling from
receiver to sender
● Producer requisition
overload.
PROS
CONS

15. 1EVENT-DRIVEN ARCHITECTURE
STANDARDS EVENT CARRIED STATE TRANSFER
Customer
Service
Address Change
Database
Event Broker
Offers
Service
Banking
service
“Customer X updated the
zip code to “123”
● Resilience
● Reducing the
Producer
requisition
overload.
Database Database
PROS
● Information
replication
● Data Consistency
CONS

16. 1EVENT-DRIVEN ARCHITECTURE
STANDARDS EVENT SOURCING
Database
Event: Address
Change
PROS
CONS
Customer
Service
Address Change
Event
Data
Source
● Audit
● Debug
● Not very familiar.
● Event Schema
“Customer X updated the
zip code to “123”

17. 1ASYNCAPI
● It is a specification.
● Focus on the application and the channels it uses to
communicate.
● Event payload definition, channel name, application / transport
headers and protocol
DOCUMENTATION

18. 1ASYNCAPI
DOCUMENTATION

19. 1ASYNCAPI
DOCUMENTAÇÃO

20. 1ASYNCAPI
DOCUMENTAÇÃO

21. 1EVENT-DRIVEN ARCHITECTURE
PROS CONS
● Coupling Reduction
● Asynchronous operations
● Easy to add new consumers
● Highly scalable and
distributed.
.
● May lead to loss of
information
● It can add more complexity if
poorly implemented.
● Challenge for data and flow
governance.
PROS/ CONS

22. 1...AND NOW?
1. Understand your need
2. Choose the best architecture
3. Choose the pattern
4. Choose the tool that best meets your need
5. Hands-on

23. 1EVENTS HUB
Subscriber EVENTS HUB Native APPs Cloud APPs Partner APPs
Publisher
● PUSH for subscribers
● Automatic message retry for subscriber
● Safety

24. sensedia.com
Obrigada!
Contacts:
ana.borges@sensedia.com
@PaulaSimiqueli
➔ Download - poster (A2)
API DESIGN REFERENCE GUIDE
http://sensedia.com/apidays