Integrating Node.js

Transcript

1. Integrating Node.js into an existing technology stack

2. Andrew Nesbitt github.com/andrew @teabass

3. forwardtechnology.co.uk

4. None
5. None
6. None

7. Show of hands

8. Benefits of Node

9. Legacy Systems

10. Benefits of integration

11. Let’s do this!

12. 1. Standalone Tools

13. Command line tools Asset minification Pixel Trackers Url shorteners Internal

    tools Monitoring Chat bots Examples

14. Legacy App Internal tool Internal tool Internal tool Internal tool

15. Easy to setup Very little integration Little experience needed Pros

16. Extra dependencies Knowledge silos Cons

17. 2. Shared databases

18. Connect directly existing database Read from a data warehouse Share

    data with a key-value store Examples

19. Legacy App DB Node

20. Quick and dirty Adapters for almost every DB available Slow

    databases not a problem Pros

21. Duplicating domain logic Race-conditions Your DBA will likely hate you

    Cons
22. None

23. 3. Using APIs

24. Use API from existing application Linkedin Mobile Github Downloads Examples

25. Legacy App DB Node

26. Avoid duplication of domain logic JSON APIs are lovely to

    work with Plays to Nodes strengths Pros

27. Extra load on existing application Might have to build/extend existing

    API What if the legacy app goes down? Cons

28. 4. Creating APIs

29. Websocket Services Streaming services APIs for Mobile Apps Proxy serivces

    File upload handling Ebay’s ql.io Examples

30. DB Node Clients

31. Handle very load Lots of concurrent connections JSON comes naturally

    Pros

32. Cons You now have a dependeny on Node System adminstration

    Teaching others about it

33. mysql Rails Disc Cache Nginx Redis Node Browser Pusher http://live.mpora.com

    Mpora Live

34. 5. Message Queues

35. ZeroMQ Resque Redis Pubsub dnode Examples

36. Message Queue Legacy App Node Legacy Worker

37. 6. Streams

38. Twitter, Facebook, Salesforce HTTP long polling Comet XMPP Examples

39. 7. Embedding

40. Ruby Racer Android Hadoop and Timothy Sprintstack PLV8 Examples

41. create or replace function fib(n int) returns int as $$

    function fib(n) { return n<2 ? n : fib(n-1) + fib(n-2) } return fib(n) $$ LANGUAGE plv8 IMMUTABLE STRICT;

42. http://pgeu-plv8.herokuapp.com

43. Legacy App Node

44. Scripting within compiled languages Use existing, battle tested software Enable

    Node on embedded devices Pros

45. Under heavy development You need to know the host platform

    Context switching overhead Cons

46. Take a unix-like approach Decoupled Systems Use APIs to share

    data Play to node’s strengths Summary

47. Node on Andriod - lanyrd.com/smpbg Rails and Node.js - lanyrd.com/srmwr

    Hadoop and Timothy - lanyrd.com/sttxx Rhinode (Sprintstack) - lanyrd.com/srmwx These slides - lanyrd.com/szwyc Links