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Talk 1: Google App Engine Development: Java, Data Models, and other things you should know (Navin Kumar, CTO of Socialwok.com)

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Singapore Google Technology User Group
Singapore Google Technology User Group

Talk 1: Google App Engine Development: Java, Data Models, and other things you should know (Navin Kumar, CTO of Socialwok.com) http://www.linkedin.com/pub/navin-kumar/3/100/a08 Description: Google AppEngine is a cloud architecture designed to run and scale your own web applications. It makes it easy to develop applications, and with the introduction of Java language support, allows you to develop using the standard servlet development model and along with GWT allows end-to-end Java development of powerful Ajax-based web applications. Here we will describe the tips and tricks that are used to develop Socialwok, a rich,on-demand enterprise microblogging platform, which is deployed on Google AppEngine using the Java language support. Finally we will introduce a neat example that illustrates some of the tricks that can be used on AppEngine to develop your own applications.

Technologie
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Google App Engine Development Java, Data Models, and Other Things You Should Know Navin Kumar Socialwok
Introduction to Google App Engine ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Java Support on Google App Engine ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Eclipse Support and GWT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Google Plugin for Eclipse (GWT and AppEngine)
BigTable: Behind Google's Datastore ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Models ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Defining Your Data Model ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Creating, Deleting, and Querying ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Relationships ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Other APIs you should be aware ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
And now for the fun stuff...  
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 1: Utilization of Memcache ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 1 (cont.) Solution: Memcache ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 1: Memcache conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 2: Message Delivery Fanout ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 2 (cont.): RDBMS version 2 Primary Tables 2 Join Tables ,[object Object],[object Object],[object Object],User ID Name 1 Navin 2 John 3 Vikram Message ID Message User ID 1 Hello world 1 2 Another message 3 Follower ID Following ID 1 2 1 3 2 1 Recipient ID Message ID 1 34 1 67
Lesson 2: List Properties to the Rescue ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],values Index key=1,values=1 key=2,values=2 key=2,values=1
Lesson 2: Our new data definition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 3: Keys-only Queries and AppEngine Key Structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 3: A solution to our Serialization Problem ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 3 (contd.): Solution (Data Def.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Lesson 3 (contd): Solution (Querying) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cool Trick: Lite Full Text Search ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
How do we build it ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Live example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
How it works. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Q & A

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Talk 1: Google App Engine Development: Java, Data Models, and other things you should know (Navin Kumar, CTO of Socialwok.com)

  • 1. Google App Engine Development Java, Data Models, and Other Things You Should Know Navin Kumar Socialwok
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  • 5. Google Plugin for Eclipse (GWT and AppEngine)
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  • 12. And now for the fun stuff...  
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  • 30. Q & A

Hinweis der Redaktion

  1. An update of a entity occurs in a transaction that is retried a fixed number of times if other processes are trying to update the same entity simultaneously. Your application can execute multiple datastore operations in a single transaction which either all succeed or all fail, ensuring the integrity of your data.
  2. Before this slide, switch to application.