Google AppEngine

step forward towards our goal of making Spring the best framework for developing enterprise-class cloud applications. Today we announced a partnership with Google to make Spring even better and to integrate it into the new Google AppEngine public cloud offering.

we realized that we have similar visions of the cloud

Our shared vision is to make it easy to build, run, and manage applications for the cloud, and to do so in a way that makes the applications portable across clouds. The rich applications should be able to run in an enterprise's private cloud, on Google's AppEngine, or on other public clouds committed to similar openness. Thus started an ambitious effort resulting in today's demonstrations at Google I/O and the downloads available here.

Basically, all you have to do is create a subclass of bulkloader.Loader and implement (at a minimum) the generate_records method, which should yield lists of strings. This same strategy would work for loading data from XML files or ROT13-encrypted files or whatever. Note that the list of strings yielded by the generate_records method must match up (in length and order) with the "properties" list you provide when you initialize the loader (ie, the second argument to the AlbumLoader.__init__ method in this example). This approach actually provides a lot of flexibility: We're overriding the __init__ method on our JSONLoader implementation and automatically determining the kind of model we're loading and its list of properties to provide to the bulkloader.Loader parent class.