title: SQLDependency solution for Azure table?
body: <p>I want to use Azure table to store data which is posted by users. And whenever a user post something to some other user it should give out a notification to this user. I have looked into Comet solution with PokeIn to see if there are a way for it. As I'm new to this technique I would like to know the approach before writing the code.</p>
  
  <p>My though to tackle this problem so far is that you can make reverse ajax call to the server. And then at the server it will continuously check the database, with a while-loop, if something has changed. A sleep will be put so it won't overload the server. However this would introduce a lot of unnecessary checks to the database. I have asked a question <a href="https://stackoverflow.com/questions/11210953/asp-net-how-to-long-polling-with-pokein">here</a> earlier, about how to do long polling. And one of the answer suggested to use SqlDependency. However this is MS SQL specific. I want to know how to do it in Azure tables, if it is possible.</p>
  
  <p>Any comments or answer to the general approach would be much appreciated.</p>