AWS Community Day 2022 Angelo Mandato First Lambda function using VSCode - Call an API, store results in S3, send an Email

1. First Lambda function
using VSCode
ANGELO MANDATO | JUNE 2022

2. About Angelo Mandato
Personal Life
● Married to Heather (best wife ever)
● Two kids (best kids ever)
● Passion for cars
○ Restoring an 81 Trans Am
● Passion for tech (that’s what I do!)
● Love where I live
○ AWS Columbus meetup
organizer
○ Supportive of all Ohio
meetups and tech conferences
Career: Wear a lot of hats
● Software Developer
● IT / CIO Director
● Co-founded startup today grosses
over 2 million annually
● Bootstrapped companies
● Supervisor and hiring IT personnel
● Project Owner / Project Manager
● Software Architect

3. Angelo’s Experience
● Software Developer since 2000
● Podcast Development since 2005
● WordPress since 2006
● AWS since 2009 (2007 if you count S3)
Scrum Alliance Certified Scrum Product Owner 2020
AWS Certified Solutions Architect – Associate 2021

4. an MVP starts with mv code
mv code
+
mv code + mv code + mv code
+
mv code + mv code + mv code + mv code + mv code
+
mv code + mv code + mv code + mv code + mv code + mv code + mv code
=
MVP

5. Every section of Minimal Viable Code…
● TEST IT ASAP!
● Make Unit Tests
● Refactor if needed, test again
Think of this as a precursor to test driven development

6. Why not just run in the AWS Console?
● Solve bugs with a debugger
● Upload your code to the Lambda console to test
● Straight forward CI/CD pipeline
● Linter / lint tool + tips
● Save time and $$$ (time is money)

7. Requirements
● AWS Account
● VSCode
● Docker

8. Making the first Lambda App in VS Code
MAC: CMD + SHIFT + P
PC: CTL + SHIFT + P
Enter: Create Lambda

9. Select nodejs14.x

10. Select Architecture

11. Select AWS SAM Hello World

12. Select Folder
Enter Project Name (hit enter after)

15. Let’s talk about debugging

16. ● *Continue (F5)
● *Step Over (F10)
● Step In (F11)
● Step Out (SHIFT+F11)
● Restart
● Stop / Disconnect
Breakpoints!!!

17. Start the debugger to test the app

18. Docker is running right???

19. Output

20. Debug Console

21. Breakpoints

22. Inspecting variables

23. Final results

24. Lest Code!
Cocktail of the week website

25. Objectives
● Make an API call to get a drink recipe
● Store JSON in S3 for website to display
● Email the recipe for historical purposes
● Put into production

26. Objectives version 1
● Make an API call to get a drink recipe
● Store JSON in S3 for website to display
● Email the recipe for historical purposes (version 2)
● Put into production

27. What we need
● *Use Parameter store to store settings and credentials (e.g. s3
bucket and path)
● *AWS SDK
● *API to Call: random cocktail recipe
● URL to retrieve recipe and display on web
* what we are doing today

28. Set settings in Systems Manager > Parameter Store

29. 2 Parameters:
S3 bucket name (/cocktails/bucket)
S3 key path (/cocktails/bucket/key/random)

31. Lets make the bun…

32. Initialize what we need

33. Return a result

34. Now test!!!

35. Time to fill our burger!

36. Nifty function to return an error

37. Code to get the bucket parameter

38. Debugger shows the values! We are good!

39. If I had a typo…

40. Let’s add the fries!

41. Make the API Call

42. Put the results in the returned result for debugging

43. We are ready for the Frosty!

44. Save the results to s3…

45. Email with SES would look something like this…
Now you may want to do both S3 and email at the same time with a “Promise.all”

46. We are ready to eat!

47. Time to deploy
Walk through the guided steps to deploy the lambda function

48. Thank you!
ANGELO MANDATO | JUNE 2022

49. Contact me
angelo@mandato.com
https://angelo.mandato.com
Twitter: @AngeloMandato