title: How to get notified about change in Cosmos DB through ChangeFeed?
body: <p>When I'm browsing through <a href="https://docs.microsoft.com/en-us/azure/cosmos-db/change-feed" rel="nofollow noreferrer">MSDN documentation</a> all I can see is "observing" changes on ChangeFeed. Even the first diagram there shows only direction <strong>from</strong> external services (Storm, Azure Functions, etc.) <strong>towards</strong> ChangeFeed.</p>
  
  <p>Is there any pattern that (is not obvious for me) we can use for getting notified about changes in Cosmos DB over ChangeFeed?
  Or there really needs to be support built-in e.g. Azure Functions to get this "PUSH" scenario working?</p>
  
  <p>Thanks a lot</p>