On the 18th of May Danilo Poccia, Technical Evangelist at Amazon Web Services, gave a lecture on Cloud Computing at IT Talent College. Watch the slides of his presentation here.

1. Building Event-Driven Serverless Applications
Danilo Poccia
Technical Evangelist
@danilop
danilop

2. 2001

3. Decentralized,
two-pizza teams
Agility, autonomy,
accountability,
and ownership
“DevOps”

4. You Want to Build
Your Brand New Application

5. Application
+
Data

6. Application
+
Data
Websites
Mobile
Apps
Wearable

7. Application Data
Websites
Mobile
Apps
Wearable

8. Application
Files
DB
Content +
Some API Calls
API Calls
Websites
Mobile
Apps
Wearable

9. Application
Files
DB
API Calls
Websites
(JavaScript
Apps)
Mobile
Apps
Wearable
JavaScript
API Calls

10. Application
Files
DB
API Calls
Websites
(JavaScript
Apps)
Mobile
Apps
Wearable
Services
API Calls
JavaScript
API Calls

11. Application
Files
DB
API Calls
Websites
(JavaScript
Apps)
Mobile
Apps
Wearable
Services
API Calls
JavaScript
Authentication
& Authorization
API
Management,
Caching &
Throttling
Business
Logic
API Calls

12. Application
DB
API Calls
Websites
(JavaScript
Apps)
Mobile
Apps
Wearable
Services
API Calls
JavaScript
Files
Amazon
S3
Amazon
DynamoDB
API Calls
Authentication
& Authorization
API
Management,
Caching &
Throttling
Business
Logic

13. Application
DB
API Calls
Websites
(JavaScript
Apps)
Mobile
Apps
Wearable
Services
API Calls
JavaScript
Files
Amazon
S3
Amazon
DynamoDB
Authentication &
Authorization
Amazon
Cognito
Business Logic
AWS
Lambda
API Management,
Caching & Throttling
Amazon API
GatewayAPI Calls

14. How Does It Works?

15. X
Authentication
Providers
End Users
User
Credentials
Authentication
Token
Amazon Cognito
Identity Broker
Identity Pool Id
(Token)
Identity Id
AWS Temp Credentials
(Depending on
Auth / Unauth Role)
Access to
AWS Services
(Including Amazon
API Gateway)
Identity Id
AWS Temp Credentials
Amazon S3
Amazon
DynamoDB
Amazon
Mobile Analytics
Amazon Cognito
Sync Store
K / V
Authentication &
Authorization
Amazon
CognitoCheck Token

16. X
End Users
User
Credentials
Authentication
Token
Amazon Cognito
Identity Broker
Identity Pool Id
(Token)
Identity Id
AWS Temp Credentials
(Depending on
Auth / Unauth Role)
Access to
AWS Services
(Including Amazon
API Gateway)
Identity Id
AWS Temp Credentials
Amazon S3
Amazon
DynamoDB
Amazon
Mobile Analytics
Amazon Cognito
Sync Store
K / V
Custom
Authentication
Service
Get Token
Token Authentication &
Authorization
Amazon
Cognito

17. X
End Users
User
Credentials
Authentication
Token
Amazon Cognito
Identity Broker
Identity Pool Id
(Token)
Identity Id
AWS Temp Credentials
(Depending on
Auth / Unauth Role)
Access to
AWS Services
(Including Amazon
API Gateway)
Identity Id
AWS Temp Credentials
Amazon S3
Amazon
DynamoDB
Amazon
Mobile Analytics
Amazon Cognito
Sync Store
K / V
Amazon Cognito
User Pools
Get Token
Token Authentication &
Authorization
Amazon
Cognito

18. A
m
azon
C
ognito
U
serPools

19. Amazon
CloudFront
API Gateway
Cache
Amazon
CloudWatch
Monitoring & Logs
Endpoints on
Amazon EC2 or
AWS Elastic Beanstalk
Internet
Any other publicly
accessible endpoint
AWS Lambda
Functions
API Management,
Caching & Throttling
Amazon API
Gateway
X
Access to
API Method

21. Managed Cache to Store API Responses
Reduced Latency and DDoS Protection through Amazon CloudFront
SDK Generation for iOS, Android and JavaScript
HTTP 429 Response for API Throttling (Managed by the SDK)
Swagger Import / Export Support
Request / Response Data Transformation and API Mocking
Custom Authorization

22. Business Logic
AWS
Lambda
AWS
Lambda
Functions
Amazon
API Gateway Amazon S3
Amazon
DynamoDB
Amazon Cognito
Sync Store
K / VAmazon
SNS
Amazon
Kinesis
Alexa Skills Kit (ASK)
Alexa Voice Service (AVS)
HTTPS
Invoke
Custom
Events
HTTPS
REST
API Call
Amazon
SES
Amazon
SWF
AWS IoT
?
?
?
?
?
?
?
Amazon
CloudWatch
Events

23. Build Back-end Services that Perform at Scale
Respond Quickly to New Information
Run Your Code without Managing Infrastructure
Cost-effective and Efficient

24. Amazon API Gateway
+
AWS Lambda

25. Resource + HTTP Verb ➔ Method (Function)

26. Resource + HTTP Verb ➔ Method (Function)
/books + GET ➔ GetAllBooksByRange

27. Resource + HTTP Verb ➔ Method (Function)
/books + GET ➔ GetAllBooksByRange
/books + POST ➔ CreateNewBook

28. Resource + HTTP Verb ➔ Method (Function)
/books + GET ➔ GetAllBooksByRange
/books + POST ➔ CreateNewBook
/books/{id} + GET ➔ GetBookById
/books/{id} + PUT ➔ CreateOrUpdateBookById
/books/{id} + DELETE ➔ DeleteBookById

29. <hands-on>
...
</hands-on>

30. Let’s Put Everything Together

31. Media Sharing Application

32. λ
λ λ
Amazon
API Gateway
λ
λ
λ
λ
Bucket Usage
Table
Media Metadata
Table
User Stat
Table
User
Location
Table
K / V
λ
λ
λ
Amazon Cognito
Identity Broker
Amazon Cognito
Sync Store
Amazon
SNS
Amazon
Kinesis
Media
Bucket
Log
Table
Authentication
&
Authorization
Upload Picture / VideoUpdate Bucket UsageCheck Bucket Usage
Delete
“Over Quota”
Media
Send Notification
to
User / Application
Extract Metadata and
Write on DB
Update
User Statistics
Call REST API
to Get
Media Description
Upload
Location Info
Update
User Location
Look for
Users or Media
Near Current Location
Call REST API
to Get
User Info
Sync
Media and User
Rating
Write
History of Changes
Check and Update
Ratings
Invoke
Read
Write / Send

33. λ
λ λ
λ
λ
λ
λ
λ
λ
λ

34. Microservice Architecture
λλ λλ
λλ λλ λ
λ

35. Choreography vs Orchestration
λλ λλ
λλ λλ λ
λ

36. Reactive Programming
λλ λλ
λλ λλ λ
λ

37. Asynchronous Communication
λλ λλ
λλ λλ λ
λ

38. Eventual Consistency
λλ λλ
λλ λλ λ
λ

39. “If you want
to increase innovation,
you have to lower
the cost of failure.”
Joi Ito, Director,
MIT Media Lab

40. Focus on Your Idea

41. aws.amazon.com/free

42. aws.amazon.com/education/awseducate
AWS Educate

43. Building Event-Driven Serverless Applications
Danilo Poccia
Technical Evangelist
@danilop
danilop