Rails with Node.js - a Reese's Moment

Introduction to Node.js and how to use it alongside Rails.

1. Rails with Node.js a Reese’s Moment Monday, September 26, 11
2. Me Monday, September 26, 11
3. In a Nutshell Monday, September 26, 11
4. In a Nutshell • Framework for building network apps Monday, September 26, 11
5. In a Nutshell • Framework for building network apps • First class evented I/O Monday, September 26, 11
6. In a Nutshell • Framework for building network apps • First class evented I/O • Built on top of V8 Monday, September 26, 11
7. What it ain’t Monday, September 26, 11
8. What it ain’t • NOT a browser side Javascript library Monday, September 26, 11
9. What it ain’t • NOT a browser side Javascript library • NOT a full fledged webapp framework Monday, September 26, 11
10. A Simple Example Monday, September 26, 11
11. A Simple Example (1..3).each do |i| contents = File.read('presentation.key') puts "#{i}. Finished reading file" puts "#{i}. doing something important..." end Monday, September 26, 11
12. A Simple Example 1. Finished reading file 1. doing something important... 2. Finished reading file 2. doing something important... 3. Finished reading file 3. doing something important... Monday, September 26, 11
13. A Simple Example var fs = require('fs'); for (var i=1; i<=3; i++) { fs.readFile('presentation.key', function(err, data) { console.log(i + ". Finished reading file"); }); console.log(i + ". doing something important..."); } Monday, September 26, 11
14. A Simple Example var fs = require('fs'); for (var i=1; i<=3; i++) { fs.readFile('presentation.key', function(err, data) { console.log(i + ". Finished reading file"); }); console.log(i + ". doing something important..."); } Monday, September 26, 11
15. A Simple Example 1. doing something important... 2. doing something important... 3. doing something important... 4. Finished reading file 4. Finished reading file 4. Finished reading file Monday, September 26, 11
16. Trust Callbacks Monday, September 26, 11
17. Trust Callbacks • Async programming is trickier Monday, September 26, 11
18. Trust Callbacks • Async programming is trickier • ...But it doesn’t block your other code Monday, September 26, 11
19. Go to Jail “Node jails you into this evented- style programming. You can’t do things in a blocking way, you can’t write slow programs.” - Ryan Dahl Monday, September 26, 11
20. Some Real Examples Monday, September 26, 11
21. Some Real Examples • Real-time dashboards and analytics Monday, September 26, 11
22. Some Real Examples • Real-time dashboards and analytics • Push notifications Monday, September 26, 11
23. Some Real Examples • Real-time dashboards and analytics • Push notifications • Fast file uploads Monday, September 26, 11
24. Dashboards + Analytics https://github.com/etsy/statsd Monday, September 26, 11
25. Dashboards + Analytics http://hummingbirdstats.com/ Monday, September 26, 11
26. Push Notifications https://github.com/mape/node-wargames Monday, September 26, 11
27. File Uploaders Monday, September 26, 11
28. File Uploaders • Slow to parse the encoded upload body Monday, September 26, 11
29. File Uploaders • Slow to parse the encoded upload body • Post-processing & background jobs Monday, September 26, 11
30. File Uploaders require 'sinatra' # curl -F "data=@notes.txt" http://localhost:4567/upload post '/upload' do # already written to params[:data][:tempfile] "" end Monday, September 26, 11
31. Upload Benchmarks MRI Ruby 1.8.7 and 1.9.2 with Sinatra 1.2.1 Node 0.5.0 2.66 GHz i7 2000 iterations on a 295 byte file Monday, September 26, 11
32. Upload Benchmarks MRI Ruby 1.8.7 and 1.9.2 with Sinatra 1.2.1 Node 0.5.0 2.66 GHz i7 2000 iterations on a 295 byte file Monday, September 26, 11
33. Upload Benchmarks MRI Ruby 1.8.7 and 1.9.2 with Sinatra 1.2.1 Node 0.5.0 2.66 GHz i7 2000 iterations on a 295 byte file Ruby 67 minutes 3.5 seconds Node 23.9 seconds Monday, September 26, 11
34. Upload Benchmarks MRI Ruby 1.8.7 and 1.9.2 with Sinatra 1.2.1 Node 0.5.0 2.66 GHz i7 2000 iterations on a 295 byte file Ruby 67 minutes 3.5 seconds Node 23.9 seconds Monday, September 26, 11
35. Upload Benchmarks MRI Ruby 1.8.7 and 1.9.2 with Sinatra 1.2.1 Node 0.5.0 2.66 GHz i7 2000 iterations on a 295 byte file Ruby 67 minutes 3.5 seconds Node 23.9 seconds Monday, September 26, 11
36. Upload Benchmarks MRI Ruby 1.8.7 and 1.9.2 with Sinatra 1.2.1 Node 0.5.0 2.66 GHz i7 2000 iterations on a 295 byte file Ruby 67 minutes 3.5 seconds Node 23.9 seconds Monday, September 26, 11
37. No Silver Bullet Monday, September 26, 11
38. No Silver Bullet • Not a replacement for Ruby Monday, September 26, 11
39. No Silver Bullet • Not a replacement for Ruby • Use where it makes sense Monday, September 26, 11
40. No Silver Bullet • Not a replacement for Ruby • Use where it makes sense • Doesn’t guarantee scalability Monday, September 26, 11
41. Wrapup Monday, September 26, 11
42. Wrapup • Server side Javascript rules! Monday, September 26, 11
43. Wrapup • Server side Javascript rules! • Event driven style of programming Monday, September 26, 11
44. Wrapup • Server side Javascript rules! • Event driven style of programming • Good for specific problems Monday, September 26, 11
45. Thanks! Questions? jerry@intridea.com @whatcodecraves http://whatcodecraves.com Monday, September 26, 11