Vortrag von Sebastian Hesse auf dem Expertenkreis Java, GEDOPLAN GmbH, 1.7.2021

1. SEBASTIAN HESSE | SERVERLESS CLOUD EXPERT | WWW.SEBASTIANHESSE.DE
SERVERLESSSYSTEMS
THE FUTURE IS HERE

2. SEBASTIAN HESSE | SERVERLESS CLOUD EXPERT | WWW.SEBASTIANHESSE.DE
• Freelance Software Engineer
• Focus: Serverless on AWS, Java, Node.js
• Started working with AWS + Serverless in early 2017
WHOAMI

3. ANY
EXPERIENCE
WITH
SERVERLESS?

4. SERVERLESSBASICS

5. Highly abstracted infrastructure service that
can run (small) parts of your application and
scale it within milliseconds.
WHATIS
“SERVERLESS”?

6. SERVICELEVELS
Infrastructure as a Service:
Virtual Servers (EC2),
Networks (VPC), and more.
IAAS SAAS
Software as a Service: out-of-
the-box solutions like
CloudWatch or Amazon
DynamoDB.
Platform as a Service:
Managed environments
(Elastic Beanstalk).
PAAS
Since 2014, also Function as
a Service (FaaS) for running
e.g. serverless functions

7. (Almost) no maintenance e
ff
orts.
Easy scalability out of the box.
Forces you to not reinvent the wheel.
No constantly running instances.
WHYUSING
SERVERLESS?

8. ‘Pay-as-you-go’ -> only pay for what you use.
This can be…
• By milliseconds / seconds
• By request, message, bytes used, …
WHATABOUTCOSTS?

9. WHYDOESITMATTERTOME?
Software is eating the world.
You need to focus on your
core business to stay ahead.
COMPETITION COSTS
You can save costs. Invest
the pro
f
its to grow your
business.

10. WELL
-
KNOWNSERVERLESSPROVIDERS

11. LESS
-
KNOWNALTERNATIVES

12. EVENT
-
BASEDARCHITECTURE

13. EVENT
-
BASED INVOCATION OF YOUR CODE
AWSLAMBDA
Payload
Lambda Function
Lambda Service

14. EVENT
-
BASED INVOCATION OF YOUR CODE
AWSLAMBDA
Lambda Function
Lambda Service
Con
f
iguration:
• Code Artifact
• Handler Function

15. EVENTPAYLOADS
• Direct invocation via API / CLI
•aws lambda invoke --function-name … --payload …
• Through other AWS Services
• e.g. SQS, SNS, API Gateway, and more

16. EVENTSWITHAPIGATEWAY
HTTP Request
Invoke Lambda function
with HTTP request
details as payload
Lambda Function
Lambda Service
API Gateway

17. FUNCTIONSETTINGS
• Runtimes: Python, Node.js, Java, etc. or custom runtimes
• Up to 10GB Memory
• Max. 15min of execution time
• AWS manages the lifecycle of the instances

18. INSTANCE LIFECYCLE
FUNCTIONINSTANCES
Payload
Invoke
Lambda Service
Function Instance 1
Function Instance 2

19. AWS LAMBDA IN THE AWS CONSOLE
DEMO

20. AWS LAMBDA + API GATEWAY
DEMO

21. MORECOMPLEXARCHITECTURES
Business Files
Metadata Processing
Metadata Table
Metadata Queue Success Notifications
File Processing
File Processing Example, e.g. extract text from PDFs

22. BUILDING MORE COMPLEX ARCHITECTURES
DEMO

23. INFRASTRUCTURE AS CODE
DEMO

24. OPENDISCUSSION

25. “
HOWCANWEDEVELOPLOCALLY?

26. “
ISSERVERLESSEASY?

27. “
CANIUSESPRINGFRAMEWORK?

28. “
NEXTSTEPS?

29. SEBASTIAN HESSE | SERVERLESS CLOUD EXPERT | WWW.SEBASTIANHESSE.DE
YOUROCK🚀
We are all standing on the shoulders of
giants. Use your new super powers to
create wonderful things!
Need further support?
HELLO@SEBASTIANHESSE.DE
CONNECT WITH ME