Wednesday, May 14, 2008

Google App Engine in Java Language

As A Java Developer it is very hard to use Google App Engine.
As for now Google App Engine supports only Python Programming language, Trying learning and writing Python languages can be very frustrating when you are used to the good pleasing Eclipse IDE.

Then I found this nice project:

You can write you Google App Engine Application in Java Language and then just convert it to Python and upload it to Google Servers!!!


Sunday, May 11, 2008

Google App Engine Limits

Google App Engine has many unknown limits and resterictions, here are few of them:

  • Data store is limit to 500mb
  • 5,000,000 monthly page views
  • 3 applications per user
  • Application response time to user must be short something like 3 seconds
  • Bulk upload failed to load long strings, I didn't succed upload strings which are more then 40 letters long
  • Unicode charcters can't store in datastore
  • Bulk upload cookie expiration is 15 minutes long, If your upload takes more time then you would need to run bulk upload several times again and again
  • Number of users which can user Goolge App Engine is limit for now
  • It is not possible to rewrite datastore date only to add more rows using bulk upload
  • Google App Engine is limit for now only to Python programming language

Nevertheless Google App Engine works and it has many advantages which are not exists elsewhere, It is ideal for developers which don't have the resource to maintain a complex website for their applications.


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