title: Is Servlet 3.1 (Read|Write)Listener supported by DeferredResult in Spring 4?
body: <p>I was reading the <a href="http://www.jayway.com/2014/05/16/async-servlets/" rel="nofollow">JayWay article</a> about Async support on Servlet with Spring.</p>
  
  <p>The interesting part is:</p>
  
  <blockquote>
    <p>If your service is expected to receive large request or response bodies, especially if the clients write or read slowly, you would benefit from using the non-blocking IO feature introduced in Servlet 3.1, as mentioned earlier. On the ServletInputStream there is the method setReadListener where you can set a ReadListener.</p>
  </blockquote>
  
  <p>I saw that you can do something with <code>DeferredResult</code> in terms of starting the servlet asynchronously but I cannot find information about anything related about <code>ReadListener</code> and <code>WriteListener</code>.</p>
  
  <p>Or at least, I expected something on that side because it's kind on the border of my application, I just need to get the request and send a result.</p>