1. Google App Engine Mano Marks Developer Advocate

2. Problems building web applications Why Google App Engine? The App Engine Components What’s Next Questions?

3. 3 Typical Web application requirements

4. 4 … and if you ’ re app becomes popular …

5. Google App Engine

6. Run your web applications on Google Infrastructure

7. Easy to start. Easy to scale.

8. The Components

9. creative commons licensed photograph from cote 1. Scalable Serving Architecture

10. 10 class MyHandler(webapp.RequestHandler): def get(self): messages = db.GqlQuery('SELECT * FROM Message ' 'ORDER BY when DESC').fetch(100) values = { 'messages': messages } self.response.out.write( template.render('main.html', values)) def post(self): message = Message(who=self.request.get('who'), content=self.request.get('content')) message.put() self.redirect('/') Request Handlers

11. 11 My Guestbook From: Message: {% for message in messages %} {{message.content}} from {{message.who}} at {{message.when}} {% endfor %} HTML Template

12. Wow, that's a big table! 2. Distributed Datastore

13. class Message(db.Model): content = db.StringProperty(required=True) who = db.StringProperty() when = db.DateTimeProperty(auto_now_add=True) Datastore Model Class

14. db.GqlQuery(“SELECT * FROM Message “ “WHERE who = ‘Mano’” “ORDER BY when DESC”).fetch(100) GQL Query

15. 3. Python Runtime & Libraries

16. 4. Software Development Kit

17. 5. Web-based Admin Console

18. Other Capabilities

19. Memcache Send E-Mail Make HTTP Requests Authenticate with Google Accounts Image Manipulation Transactions

20. Relations are possible By reference Parent Child Schema-less Many small queries more efficient Everything revolves around the request and response No cron jobs Some things you’re not used to

21. 500 MB Storage 11 GB Bandwidth / day ~ 5 Million Pageviews / month Free to Get Started

22. 500 MB Storage 11 GB Bandwidth / day ~ 5 Million Pageviews / month Always Free to Get Started

23. More Languages Purchase Additional Capacity Large upload/download support Offline Processing What’s Next?

24. Questions?

25. Thank you! http://code.google.com/