[jkarneges]

Re: websockets/push, another thing you can do is run two frameworks side by side. A load balancer like HAProxy can be used to unify the two, if needed.

For example, at my previous job we used Django for our main request/response API and Tornado for our push API. Later on, the Tornado part was rewritten in Java. Given the Django experience of the team, this architecture proved to be easier to maintain than having to rewrite the entire API, since there were far more request/response endpoints than push endpoints.

Nowadays there's Pushpin, which I created after the above experience.