![REST [Fielding 2000] Re presentational S tate T ransfer ( )](https://image.slidesharecdn.com/cdocumentsandsettingspamelafoxmydocumentsadelaidecloud-090403002651-phpapp02/85/Living-in-the-Cloud-Hosting-Data-Apps-Using-the-Google-Infrastructure-29-320.jpg)
![The Google Data Protocol POST /myFeed <?xml version="1.0"?> <entry xmlns=" http://www.w3.org/2005/Atom "> <author> <name>Elizabeth Bennet</name> <email> [email_address] </email> </author> <title type="text">Entry 1</title> <content type="text">This is my entry</content> </entry> Creating a new resource](https://image.slidesharecdn.com/cdocumentsandsettingspamelafoxmydocumentsadelaidecloud-090403002651-phpapp02/85/Living-in-the-Cloud-Hosting-Data-Apps-Using-the-Google-Infrastructure-41-320.jpg)
![The Google Data Protocol 201 CREATED <?xml version="1.0"?> <entry xmlns=" http://www.w3.org/2005/Atom "> <id> http://www.example.com/id/1 </id> <link rel="edit" href=" http://example.com/myFeed/1/1/ "/> <updated>2006-01-23T16:26:03-08:00</updated> <author> <name>Elizabeth Bennet</name> <email> [email_address] </email> </author> <title type="text">Entry 1</title> <content type="text">This is my entry</content> </entry> Creating a new resource](https://image.slidesharecdn.com/cdocumentsandsettingspamelafoxmydocumentsadelaidecloud-090403002651-phpapp02/85/Living-in-the-Cloud-Hosting-Data-Apps-Using-the-Google-Infrastructure-42-320.jpg)
![The Google Data Protocol PUT /myFeed/1/1/ <?xml version="1.0"?> <entry xmlns=" http://www.w3.org/2005/Atom "> <id> http://www.example.com/id/1 </id> <link rel="edit" href=" http://example.com/myFeed/1/1/ "/> <updated>2006-01-23T16:28:05-08:00</updated> <author> <name>Elizabeth Bennet</name> <email> [email_address] </email> </author> <title type="text">Entry 1</title> <content type="text">This is my first entry.</content> </entry> Updating an entry](https://image.slidesharecdn.com/cdocumentsandsettingspamelafoxmydocumentsadelaidecloud-090403002651-phpapp02/85/Living-in-the-Cloud-Hosting-Data-Apps-Using-the-Google-Infrastructure-43-320.jpg)
![The Google Data Protocol 200 OK <?xml version="1.0"?> <entry xmlns=" http://www.w3.org/2005/Atom "> <id> http://www.example.com/id/1 </id> <link rel="edit" href=" http://example.com/myFeed/1/2/ "/> <updated>2006-01-23T16:28:05-08:00</updated> <author> <name>Elizabeth Bennet</name> <email> [email_address] </email> </author> <title type="text">Entry 1</title> <content type="text">This is my first entry.</content> </entry> Updating an entry](https://image.slidesharecdn.com/cdocumentsandsettingspamelafoxmydocumentsadelaidecloud-090403002651-phpapp02/85/Living-in-the-Cloud-Hosting-Data-Apps-Using-the-Google-Infrastructure-44-320.jpg)
![Questions? Pamela Fox [email_address] @pamelafox More Info http://code.google.com ↶](https://image.slidesharecdn.com/cdocumentsandsettingspamelafoxmydocumentsadelaidecloud-090403002651-phpapp02/85/Living-in-the-Cloud-Hosting-Data-Apps-Using-the-Google-Infrastructure-55-320.jpg)
Living in the Cloud: Hosting Data & Apps Using the Google Infrastructure
- 1. Living In The Cloud Hosting Data & Apps Using The Google Infrastructure
- 2. Introductions Pamela Fox USC Google MS/BS CS
- 4. The Cloud!
- 5. Tonight’s Agenda Google Data APIs App Engine
- 6. Before the Cloud: Web Apps
- 7. After the Cloud: Web Apps
- 8. Viral Spread Simultaneous Edits = Scaling Nightmare Mo’ Users, Mo’ Problems
- 10. What Is App Engine? Lets you run your web application on top of Google’s infrastructure. Servers Network Datastore Backups Pagers Scalable }
- 11. Why App Engine “ We wear pagers so you don’t have to.” — Guido van Rossum
- 12. Simplicity App Engine is designed to be simple. Simple application configuration. No systems administration. No performance tuning. Automatic scaling.
- 13. App Engine Architecture code data
- 15. Python
- 16. Data Store
- 17. Data Store db.GqlQuery("SELECT * FROM Shout " "WHERE who >= 'b ' AND who < ' c ' " "ORDER BY when DESC").fetch(100) query = Shout.all() query.order('-date') query.filter('who >=', 'b') query.filter('who <', ‘c') shouts = query.fetch(100)
- 18. Memcache
- 20. Demo Google App Engine
- 21. Before the Cloud: User Apps
- 22. Before the Cloud: User Apps
- 23. Users demand ownership of their content. Other sites want to access that content. Damn Needy Users
- 24. Solution: Google data APIs
- 25. How Do You Make Things Accessible? A pplication P rogramming I nterface ( )
- 26. APIs An application programming interface (API) is a set of functions, procedures, methods or classes that an operating system , library or service provides to support requests made by computer programs . Source: Wikipedia C/C++ Header File
- 27. APIs RPC || REST * SOAP
- 28. Remote Procedure Calls fooInstance->addNumbers(2, 3); <?xml version="1.0"?><methodCall> <methodName>Foo.addNumbers</methodName> <params> <param> <value><int>2</int></value> <value><int>3</int></value> </param> </params></methodCall> fooInstance.addNumbers(2, 3); PHP XML (Network) C++
- 29. REST [Fielding 2000] Re presentational S tate T ransfer ( )
- 30. REST Fundamentals of REST: Application state and functionality is abstracted into discrete resources .
- 31. REST Fundamentals of REST: Resources are accessible via URLs . /blog/posts/1234
- 32. REST Fundamentals of REST: Resources share a uniform interface for transferring state . HTTP:// } GET POST PUT DELETE
- 33. RSS/ATOM Feed { Entries Example ATOM feed.
- 34. ATOMPub Feed { Entries
- 35. Google data APIs Protocol Feed Query { Entries
- 36. The Google Data Protocol REST Google Data Protocol RSS 2.0 Architecture Syndication Updates AtomPub Atom
- 37. The Google Data Protocol RSS 2.0 Atom(Pub) Google Data Syndication Format ✓ ✓ ✓ Queries ✓ Updates ✓ ✓ Optimistic Concurrency ✓ Authentication ✓
- 38. The Google Data Protocol Over 15 APIs, 1 Protocol Many Uses
- 40. The Google Data Protocol GET /myFeed 200 OK <?xml version="1.0"?> <feed xmlns=" http://www.w3.org/2005/Atom "> <title>Foo</title> <updated>2006-01-23T16:25:00-08:00</updated> <id> http://www.example.com/myFeed </id> <author> <name>Jo March</name> </author> <link href="/myFeed" rel="self"/> </feed> Requesting a feed or resource
- 41. The Google Data Protocol POST /myFeed <?xml version="1.0"?> <entry xmlns=" http://www.w3.org/2005/Atom "> <author> <name>Elizabeth Bennet</name> <email> [email_address] </email> </author> <title type="text">Entry 1</title> <content type="text">This is my entry</content> </entry> Creating a new resource
- 42. The Google Data Protocol 201 CREATED <?xml version="1.0"?> <entry xmlns=" http://www.w3.org/2005/Atom "> <id> http://www.example.com/id/1 </id> <link rel="edit" href=" http://example.com/myFeed/1/1/ "/> <updated>2006-01-23T16:26:03-08:00</updated> <author> <name>Elizabeth Bennet</name> <email> [email_address] </email> </author> <title type="text">Entry 1</title> <content type="text">This is my entry</content> </entry> Creating a new resource
- 43. The Google Data Protocol PUT /myFeed/1/1/ <?xml version="1.0"?> <entry xmlns=" http://www.w3.org/2005/Atom "> <id> http://www.example.com/id/1 </id> <link rel="edit" href=" http://example.com/myFeed/1/1/ "/> <updated>2006-01-23T16:28:05-08:00</updated> <author> <name>Elizabeth Bennet</name> <email> [email_address] </email> </author> <title type="text">Entry 1</title> <content type="text">This is my first entry.</content> </entry> Updating an entry
- 44. The Google Data Protocol 200 OK <?xml version="1.0"?> <entry xmlns=" http://www.w3.org/2005/Atom "> <id> http://www.example.com/id/1 </id> <link rel="edit" href=" http://example.com/myFeed/1/2/ "/> <updated>2006-01-23T16:28:05-08:00</updated> <author> <name>Elizabeth Bennet</name> <email> [email_address] </email> </author> <title type="text">Entry 1</title> <content type="text">This is my first entry.</content> </entry> Updating an entry
- 45. The Google Data Protocol DELETE /myFeed/1/2/ 200 OK Updating an entry
- 46. Demo Google Data CRUD
- 47. The Google Data Protocol GET /myFeed?q=This 200 OK <?xml version="1.0"?> <feed xmlns=" http://www.w3.org/2005/Atom "> <title>Foo</title> <updated>2006-01-23T16:26:03-08:00</updated> <id> http://www.example.com/myFeed </id> <link href="/myFeed" rel="self"/> <entry> <id> http://www.example.com/id/1 </id> <link rel="edit" href=" http://example.com/myFeed/1/1/ "/> <updated>2006-01-23T16:26:03-08:00</updated> <title type="text">Entry 1</title> <content type="text">This is my entry</content> </entry> </feed> Searching for a resource
- 49. JSON and RSS Other formats are also supported: ?alt=json ?alt=json-in-script ?alt=kml ?alt=rss http://code.google.com/apis/gdata/json.html
- 50. Client Libraries PHP .NET Java JavaScript Objective-C Python + Community Contributed
- 51. Demo Google Data Sample Applications
- 52. My Secret Motivation For Giving This Talk Google Data APIs ♥ App Engine
- 53. Demo Google Data APIs + App Engine
- 54. Questions?
- 55. Questions? Pamela Fox [email_address] @pamelafox More Info http://code.google.com ↶