Developing Java Apps for Google App Engine

Developing Java Apps for Google App Engine

Testing:

There are things that google need to improve on testing aspects. The service stub approach may not be practical always.

Developers need to be cautious that the testing will take more time than otherwise.

Persistence:

Coding for JPA or JDO will only guarantee 80% abstraction. Developers still need to understand that you are dealing with Nested HashMaps and not with RDBMS.

This is a big shift in the enterprise development world.

Concurrency:

Google App Engine has a single thread model.

3rd party libraries may need to change to work in this environment.