Google app engine acting as a middleware

sorry if this que开发者_如何学运维stion sounds useless . I am researching about google app engine . The point which i want to know that does Google app engine acts as a Middle ware for accessing clouds ? if there is any digram which represent it as a middle ware then please let me know

Google AppEngine is "the clouds".

Seriously, GAE is one of the cloud computing solutions and as such is self-sufficient, i.e. it does not need other cloud services to be operable nor was it designed to be middleware for other cloud services.

OTOH, it has facilities to talk to other clouds and could be used as middleware solution (client-GAE-other cloud), but it's not a good fit for that: for example, it does not support TCP sockets, so protocols that require them could not be implemented.