title: How does WebJob QueueTrigger trigger, polling or event?
body: <pre><code>public static void ProcessMessage([QueueTrigger("queue")] string message, TextWriter log)
  {
      //processing message
  }
  </code></pre>
  
  <p>How exactly this method will be triggered. </p>
  
  <p>Is WebJob host just poling the Storage Queue.
  Or Storage Queue raising new message event, that host subscribed to?  </p>