Dennis Alund (Google Developer Expert on Firebase, Founder, Kumpul Coworking Space) Firebase Cloud Functions

1. Dennis Alund
Founder Kumpul Coworking Space
Google Developer Expert for Firebase

2. Prerequisites
Some basic knowledge about Firebase
Preferably played with Firebase
Good understanding of source code management

3. Some of the things you will take from here
What cloud functions are
Ideas of where Firebase cloud functions could fit into your
existing project and what you can do with Firebase
Devops
How to Firebase like a boss

4. What are cloud functions?

5. IAAS PAAS FAAS
y = f(x)
Evolution of the cloud

6. Where are the cloud functions!?

8. What can cloud functions do?

9. Triggers
1. Writes to real time database
2. Uploads to storage bucket
3. New user authentication (create/delete)
4. Firebase Cloud Messaging
5. Analytics conversion event
6. Incoming HTTPS request

10. Writes to real time database
FCM notify user when someone likes a post
Update counter of likes on a post
Transform data
Fan out data
Move chat logs to “archive” after some time or certain amount
of child nodes

11. /posts/{id}/likes/{uid}
1
2
3
Trigger on data
change (CRUD)
Write back likes count
Write post like
data
Update counter of likes on a post
/posts/{id}/likes_count/{num}

12. /posts/{id}/likes/{uid}
1
2
Trigger on data
change (CRUD)
FCM to
client
device(s)
Write post
like data
FCM notify user when someone likes a post
34
Notify
new likes

13. /posts/{id}
1
2
3
Trigger on data
change (CRUD)
Write new data
Write post
data
Fan out data
/user_posts/{uid}/{id}
/topic_posts/{topic}/{id}

14. Uploads to storage bucket
Make thumbnails and upload them back to the storage bucket
Notify user over cloud messaging that there are new
documents/attachments
Update a counter of how many documents a user has, or how
much space is used

15. New user authentication (create/delete)
Send a welcome email (or further instructions after signing
up)
Scaffold initial default account data (make entries in database
where needed for new users)
Delete user data when the account is deleted (chat logs, etc)

16. Firebase Cloud Messaging
Count most active FCM topics
Trending data in FCM notifications to group messages

17. Analytics conversion event
Send a coupon to client after first purchase.
Send a discount code to client that has invited a friend.

18. Incoming HTTPS request
Replace a need for API framework (flask etc)
Third party integrations with Firebase (webhooks)
Serve a static page generated from Firebase database data

19. How do you create a function?

20. Cloud Functions Development
Runs on NodeJS
Javascript is a deceptive language. It looks like a simple
language. Sometimes you expect it to work in one way, but
you would be surprised how often it’s not the case.
Planned support for other languages in pipeline… anyone
guessing on Go?

21. USE TYPESCRIPT

23. /posts/{id}/likes/{uid}
1
2
3
Trigger on data
change (CRUD)
Write back likes count
Write post like
data
Update counter of likes on a post
/posts/{id}/likes_count/{num}

25. DIVIDE AND CONQUER.
A CLOUD FUNCTION CAN ONLY
EXECUTE FOR 60 SECONDS

26. DEVOPS

27. ONE REPOSITORY PER
PLATFORM
ONE REPOSITORY DEDICATED
FOR DATABASE RULES AND
CLOUD FUNCTIONS

28. 4
1
git pull
(index.ts)
git push
(index.ts)
2
3
coding
(index.ts)
compile
(index.js)
5
firebase deploy
(index.js)
index.ts
{}

29. CONTINUOUS INTEGRATION FOR
AUTOMATED BUILD, DEPLOY AND
HOUSEKEEPING

30. 4
git pull
(index.ts)
index.ts
{}
git push
(index.ts)
2
3
coding
(index.ts)
compile
(index.js)
firebase deploy
(index.js)
continuous
integration
5 6
7
8
git push
(index.ts,
index.js)
cloud
debugging
1

31. A lot to master..
Database structuring (hello SQL developers!)
Reactive programming
Analytics (knowing your users is your #1 priority)
Concurrent, asynchronous, distributed

32. Dennis Alund
github.com/DennisAlund
medium.com/evenbit
Google Developer
Expert Firebase
Kumpul Coworking
Space
www.kumpul.co
Oddbit
www.oddbit.id