Our Spawnfest2012 entry was ridiculously ambitious - a 'social' application involving real-time data-streams, R-trees, heaping doses of OTP goodness including gen_fsm, gen_server, gen_event, and much much more. Because this wasn't challenging enough, our three team-members were from three different countries, making both our application *and* the development distributed! Join me as I take you through our SpawnFest experience in all its glory (or infamy). Find out what worked, what features got tossed, and what failed miserably - and why.

1. What I did on my
vacation
{ Spawnfest!

3.  48 hours
 #erlang
 Other legalese
Spawnfest

4.  “Crowd-sourcing the Sourcing of crowds”
Erlymob

5.  Flash-mobs
 Activism
 “Quick notice” meetups
Erlymob

7. Thriller "Monster Dance", 6:30pm today -->
https://maps.google.com/maps?ll=40.731129,-73.985581
Erlymob

8. #mobA313f
Erlymob

9. Thriller "Monster Dance", 6:30pm today
Erlymob

10. I Like it!
I Ignore it!
I'll Do it!
Erlymob

12. Team
Net_Split

13.  Who scheduled dinner for Saturday evening?
Team Net_Split

14.  Who scheduled dinner?
Team Net_Split

15.  Your flight is when?
Team Net_Split

17.  But I like diving
Team Net_Split

19.  Who scheduled dinner?
 Your flight is when?
 But I like diving
 Oh right, my wife is also part of this vacation
Team Net_Split

21. The best laid schemes o’ mice an’ men
Gang aft agley
Evolution (in reverse)

22. What We Planned
Incoming Posts Sent on same Node Sent across Nodes Notification Only Consults Sent across All Nodes Incoming User Locations
twitter_r
cowboy
eceiver
mnesia
post_rec user_tab user_rec
eiver le eiver
mnesia mnesia mnesia_
post_dis post_tab geocouc geocouc
r_tree_ user_loc post_dis r_tree_
h_proces
manager ator tributor tributor_ le h_table manager
sor
table
post_r_t user_pro geocouc user_r_t
ree cess h ree

23. What We Hoped For
Incoming Posts Sent on same Node Sent across Nodes Notification Only Consults Sent across All Nodes Incoming User Locations
twitter_r
cowboy
eceiver
mnesia
post_rec user_tab user_rec
eiver le eiver
mnesia
r_tree_ user_loc post_dis post_dis r_tree_
manager ator tributor tributor_ manager
table
post_r_t user_pro user_r_t
ree cess ree

24. What We Got
Incoming Posts Sent on same Node Sent across Nodes Notification Only Consults Sent across All Nodes Incoming User Locations
twitter_r
cowboy
eceiver
mnesia
post_rec user_tab user_rec
eiver le eiver
mnesia
post_dis post_dis
tributor tributor_
table
post_r_t user_pro user_r_t
ree cess ree

25.  R-Trees
What got dropped

26.  R-Trees
 Notifications
What got dropped

27.  R-Trees
 Notifications
 Web-sockets
What got dropped

28.  R-Trees
 Notifications
 Web-sockets
 2nd persistence layer
What got dropped

29.  app_cache :
https://github.com/dieswaytoofast/app_cache
Mnesia-based persistence and caching
Serendipity

30. app_cache - definitions

31. app_cache - init

32. app_cache - accessors

33. app_cache - sequences

34. app_cache - transforms

35.  Inspired by :
https://github.com/jcomellas/mlapi
app_cache

36.  twitterl :
https://github.com/dieswaytoofast/twitterl
Twitter API

37. REST& Streaming APIs

38. Erlang-world

39. Targets

40. process_request/4 safe_call/4
Requestor Processor
TWEET
spawn
Handler
Response Tweet
Parser
twitterl

41.  Inspired by :
https://github.com/ngerakines/erlang_twitter
twitterl

55.  Chicago BOSS is not for n00bs
Who knew?

56.  Chicago BOSS is not for n00bs
 Implementing O-Auth is Teh Sux0r
Who knew?

57.  Chicago BOSS is not for n00bs
 Implementing O-Auth is Teh Sux0r
 Strings =/= Binaries
Who knew?

58.  Chicago BOSS is not for n00bs
 Implementing O-Auth is Teh Sux0r
 Strings =/= Binaries
 if =/= if
 Syntax is Easy, Semantics not so much
 Immutable Variables  Instant Karma
Who knew?