I recently had to port one of my applications, which makes heavy use of the Data Store API, to run outside AppEngine. A client needed the ability to install the application on their own internal web servers (Apache+mod_wsgi). Thankfully I wasn't using any GQL, so I was able to write a very simple drop-in replacement for the google.appengine.ext.db module. I replaced memcache with a null API that just returns None for everything, eventually I'll have the client install memcached and link in a real API. These modifications allowed me to deploy the application to an Apache server with almost zero changes to the application's code base. In fact the only changes were the import statements, (from myapp_wsgi.lib import db) which selects either my standalone db module or google's based on a config file.
The AppEngine SDK obviously includes a free standing db module, but without fully understanding the code base I wasn't willing to deploy it in a production environment. However, the simplicity of replacing the ext.db API (or at least a subset of it) got me thinking about writing a back-end for Amazon's S3, and running my app on EC2. I could also imagine back-ends that tie into a relational database such as MySQL (though I'm not immediately sure of the utility there). I like developing on AppEngine, but I would like it even more if I could easily move my applications from AppEngine to a client's server to EC2 and back without major refactoring. Managing servers sucks, which makes App Engine amazingly simple, but sometimes you need more flexibility. Are there any existing libraries that allow one to use the Data Store API without being tied to AppEngine? Does anyone see utility in such a library? I'm not thinking of an abstraction layer, more a drop in replacement for the API. The App Engine SDK is released under the Apache License so I don't see any immediate legal issues, but perhaps I'm missing something? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
