This document provides an overview of building applications with Google App Engine. It discusses what cloud computing is and the different types of cloud services like IaaS, PaaS, and SaaS. It highlights key facts about Google App Engine like having over 250,000 developers, 100,000 apps, and serving over 250 million daily pageviews. The document also demonstrates the Wall demo app built on App Engine and covers the development tools and languages supported.

1. Building Applications with
Google App Engine
Cloud Computing Expo 2010, New York, NY
Chris Schalk
Developer Advocate
http://twitter.com/cschalk

2. What is
cloud
computing?

3. Cloud Computing Defined
SaaS
APaaS
IaaS
Source: Gartner AADI Summit Dec 2009

4. IaaS value proposition…

5. APaaS value proposition…

6. APaaS value proposition…

7. Google App Engine
Easy to build
Easy to maintain
Easy to scale

8. By the numbers

9. By the numbers

10. By the numbers
250,000+
Developers

11. By the numbers
100,000+
Apps

12. By the numbers
250M+
daily
Pageviews

13. In a word… via Wordle
Word source: http://en.wikipedia.org/wiki/App_Engine

14. Some App Engine Partners

15. Socialwok

16. Social networking at scale
>62M Users

17. gigy Socialize

18. gigy Socialize
Flexible Scalability
"Although we typically host all our services in-house,
on our own infrastructure, we felt that GAE would be a better fit
for the live chat feature because of its unique traffic pattern, which
is characterized by very low traffic most of the time with very high
bursts during high profile events."
Raviv Pavel, Gigya VP of Research and Development
http://googleappengine.blogspot.com/2010/02/scalability-means-flexibility.html#links

19. Why App Engine?

20. Managing Everything is Hard

22. DIY Hosting means hidden
costs
Idle capacity
Software patches & upgrades
License fees
Lots of maintenance
Traffic & utilization forecasting
Upgrades

23. Cloud development in a box
SDK & “The Cloud”
Hardware
Networking
Operating system
Application runtime
Java, Python
Static file serving
Services
Fault tolerance
Load balancing

24. App Engine Details

25. Specialized Services
Memcache Datastore URL Fetch
Mail XMPP Task Queue
Images Blobstore User Service

26. Specialized Services
Memcache Datastore URL Fetch
Mail XMPP Task Queue
Images Blobstore User Service

27. Language runtimes
Duke, the Java mascot
Copyright © Sun Microsystems Inc., all rights reserved.

28. Ensuring Portability

29. Extended Language support
through JVM
Java
Scala
JRuby (Ruby)
Groovy
Quercus (PHP)
Rhino (JavaScript) Duke, the Java mascot
Copyright © Sun Microsystems Inc., all rights reserved.
Jython (Python)

30. Always free to get started
-~5M pageviews/month
6.5 CPU hrs/day
1 GB storage
650K URL Fetch calls/day
2,000 recipients emailed
1 GB/day bandwidth
100,000 tasks enqueued
650K XMPP messages/day

31. Application Platform Management

32. App Engine Dashboard

33. App Engine Health History

34. 20+ months in review
Apr 2008 Python launch
May 2008 Memcache, Images API
Jul 2008 Logs export
Aug 2008 Batch write/delete
Oct 2008 HTTPS support
Dec 2008 Status dashboard, quota details
Feb 2009 Billing, larger files
Apr 2009 Java launch, DB import, cron support, SDC
May 2009 Key-only queries
Jun 2009 Task queues
Aug 2009 Kindless queries
Sep 2009 XMPP
Oct 2009 Incoming Email
Dec 2009 Blobstore
Feb 2010 Datastore cursors

35. Happy Birthday App Engine!
Two years old as of Wed April 7th!
Vibrant community of over 250k developers
Over 250 million pageviews
http://googleappengine.blogspot.com/2010/04/happy-birthday.html

36. Development Tools for App Engine

37. Google App Engine Launcher

38. SDK Console

39. Google Plugin for Eclipse

40. AppStats
Win a T-shirt
Upload before/after
screenshots and link
them on Twitter before
May 2nd
@app_engine
#coolappstats

41. Demo time!

42. Wall demo App
An adaption of the "Guest Book"
Tutorial Application
Uses:
Datastore for comments/blobs
Blobstore for initial image upload
Image api for thumbnail creation
XMPP - for chatbot access
Also uses Maps API for geo
features
Post a comment at:
http://cloudexpowall.appspot.com

43. Wall demo App Architecture

44. More Info on App Engine:
http://code.google.com/appengine
http://googleappengine.blogspot.com/
http://gae-java-persistence.blogspot.com/
http://bit.ly/gcodelabs

45. Q&A
Contact info:
Chris Schalk
Developer Advocate
http://twitter.com/cschalk
cschalk@gmail.com