Data: online and off

Transcript

1. DATA: ONLINE AND OFF
2. Phil Nash @philnash http:/ /philna.sh philnash@twilio.com
3. DATA: ONLINE AND OFF
4. OFFLINE FIRST
5. Offline first An application that treats the network as an enhancement
6. Not offline first •  Graceful failure to network requests •  Just saving data client side
9. THINGS TO CONSIDER
10. ASSETS
11. SERVICE WORKER
13. USER DATA
15. DATA: ONLINE AND OFF
16. Data: online and off •  Traditional application data storage •  Traditional vs offline first •  Browser based data storage •  Offline first and data
17. TRADITIONAL APPLICATION DATA STORAGE
18. GET / POST
19. Traditional application data storage 1.  POST data to a server 2.  Server stores data in a database 1.  GET request for data 2.  Server interprets request and delivers
20. OFFLINE?
21. TRADITIONAL VS OFFLINE FIRST
22. INTERACT LOCALLY
23. Interact locally •  Save data locally •  Retrieve data from local cache
24. Interact locally •  Crazy fast! •  The network doesn't matter
25. THEN SYNC
26. Sync •  People have multiple devices •  Good as a backup
27. Sync •  Can be asychronous •  Can be intentional •  Requires network
28. DATA STORAGE IN THE FRONT END
29. LOCALSTORAGE
30. LocalStorage •  Simple key value store •  Synchronous (slow)
31. WEBSQL
32. WEBSQL
33. INDEXEDDB
34. IndexedDB •  Asynchronous •  o_O
35. MAKING DATA OFFLINE FIRST
36. Making data offline first We need something that is: •  Easily distributed •  Eventually consistent •  Resolves conflicts •  Web friendly
38. CouchDB Apache CouchDB™ is a database that uses JSON for documents, JavaScript for MapReduce indexes, and regular HTTP for its API
40. PouchDB •  CouchDB for the browser/Node •  Wraps IndexedDB or WebSQL •  LocalStorage adapter available as a plugin
41. DEMO
42. Offline first •  The time for offline first is now •  Distributing data like this requires a change of mindset •  Not all application data needs to be stored this way
43. Help me! On a scale of 0 to 10, how likely is it that you would recommend this talk to a friend or colleague? 0203 322 5761
44. Thanks! @philnash http:/ /philna.sh philnash@twilio.com On a scale of 0 to 10, how likely is it that you would recommend this talk to a friend or colleague? 0203 322 5761