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Damn are getting
the new generation students
iPads in high school

iText, Google App Engine, iPads, Html5

kars@q42.nl
q42.nl

Agenda

• About Q42
• The Case
• Demo 1
• Technical Architecture
• Demo 2
• Next
!2
q42.nl

Q42
Software Engineers 

&

Interaction Engineers 

(40+)



wanting to



make the user kick ass!
q42.nl

Q42 Office
The Case

q42.nl

Schooltas:
Let students learn more efficient


•
•
•
•
•
•

personal device: a device for every student
i...
Numbers

q42.nl

2011 Version 1.0, 1.1, 1.2



2012 Version 2.0, 2.1, ...


2000 daily users, 26 pilot schools
20.000+ per...
q42.nl

Tech stack

• Play framework 1.2.4
• Google App Engine
• iText
• iOS native + Html5 clients
!7
q42.nl

Demo

• Demotime

!8
q42.nl

Technical Stuff

• Platform
• Datamodel
• Setup
• Learnings
!9
Platform

q42.nl

Books: PDF’s

Enrichments: a lot

GAE Platform
iPad delivery (DRM)
Html 5 delivery (rendering) (tablets,...
Data

q42.nl

Split

Book
Task
Queue’s
Bundle
Backends

iText
encryption jobs

Encrypted Book

iText
Rendering jobs
Downlo...
q42.nl

GAE

• We deploy every day.

!12
q42.nl

GAE & iText

• Backends & Taskqueue’s
• BlobStore
• iText encryption tasks
!13
q42.nl

GAE & iText

• Learnings
• encryption is fast
• in-memory: we need RAM
• BlobStore unreliable and slow
• CDN deliv...
q42.nl

Demo

• Demotime

!15
q42.nl

Next

• PDF fulltext search
• Interactive Document Format

!16
GAE

q42.nl

• Focus on what you want to do


• Code.
!17
GAE

q42.nl

•
•
•
•
•
•
•
•

Taskqueue’s
Backends

•
•
•
•

Bigtable
Admin
Deploys
Traffic Splitting
Scale up & down
FT lo...
q42.nl

Tech startingpoints

• http://www.playframework.org
• http://code.google.com/appengine


• @q42 / q42.nl
• @school...
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Damn, the new generation kids are getting iPads in Highschool!

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A Google App Engine platform connected to a native iPad solution distributing books and content, presented at the iText Summit 2012 by Kars Veling, Owner Q42 Internet BV.

Published in: Technology, News & Politics
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Damn, the new generation kids are getting iPads in Highschool!

  1. 1. Damn are getting the new generation students iPads in high school iText, Google App Engine, iPads, Html5 kars@q42.nl
  2. 2. q42.nl Agenda • About Q42 • The Case • Demo 1 • Technical Architecture • Demo 2 • Next !2
  3. 3. q42.nl Q42 Software Engineers 
 &
 Interaction Engineers 
 (40+) 
 wanting to
 
 make the user kick ass!
  4. 4. q42.nl Q42 Office
  5. 5. The Case q42.nl Schooltas: Let students learn more efficient • • • • • • personal device: a device for every student in a classroom at home traveling teacher digiboards !5
  6. 6. Numbers q42.nl 2011 Version 1.0, 1.1, 1.2
 2012 Version 2.0, 2.1, ... 2000 daily users, 26 pilot schools 20.000+ personal notes target audience: 900.000 students in High Schools 1.000’s books (for now) !6
  7. 7. q42.nl Tech stack • Play framework 1.2.4 • Google App Engine • iText • iOS native + Html5 clients !7
  8. 8. q42.nl Demo • Demotime !8
  9. 9. q42.nl Technical Stuff • Platform • Datamodel • Setup • Learnings !9
  10. 10. Platform q42.nl Books: PDF’s Enrichments: a lot GAE Platform iPad delivery (DRM) Html 5 delivery (rendering) (tablets, laptop) ... (rest) 1. Encryption 3. CDN Delivery 2. Rendering !10 4. FT search ...
  11. 11. Data q42.nl Split Book Task Queue’s Bundle Backends iText encryption jobs Encrypted Book iText Rendering jobs Downloads !11
  12. 12. q42.nl GAE • We deploy every day. !12
  13. 13. q42.nl GAE & iText • Backends & Taskqueue’s • BlobStore • iText encryption tasks !13
  14. 14. q42.nl GAE & iText • Learnings • encryption is fast • in-memory: we need RAM • BlobStore unreliable and slow • CDN delivery: oh yeah • TaskQueue’s to the rescue • B8’s dynamically (4.8Ghz, 1Gb ram); :) • Backends: max 10Gb RAM in total • Play Framework: slow bootup (10 .. 15 s) • Objectify Play Framework Module: don’t. Use Siena !14
  15. 15. q42.nl Demo • Demotime !15
  16. 16. q42.nl Next • PDF fulltext search • Interactive Document Format !16
  17. 17. GAE q42.nl • Focus on what you want to do • Code. !17
  18. 18. GAE q42.nl • • • • • • • • Taskqueue’s Backends • • • • Bigtable Admin Deploys Traffic Splitting Scale up & down FT logfiles !18 Image Server & CDN Cost Global latency BlobStore, GStore?
  19. 19. q42.nl Tech startingpoints • http://www.playframework.org • http://code.google.com/appengine • @q42 / q42.nl • @schooltasapp • schooltas.net • @karsveling !19

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