Hi JDO specification folk, One environment where I'd like to use JDO is Google AppEngine's datastore, and that datastore specifies a way of working with data where one fires off the query and then gets the results from a Future some time later [1]. (I am sure Andy knows all about it lately :-)).
As far as I know, JDO doesn't currently standardise a way of working with datastores in an async manner. Maybe that would be an interesting problem for JDO 4 some day? As datastores increasingly become non-local and latencies for operations become high, getting a callback when the datastore is finished is a convenient way of working with it. cheers, David. [1] http://code.google.com/appengine/docs/java/javadoc/com/google/appengine/api/datastore/AsyncDatastoreService.html
