title: kafka Streams session windows
body: <p>Hello I am working on kafka  session window with inactive time 5 mins. I want some kind of feedback when inactive time is reached and session is drooped for the key.
  lets assume I have </p>
  
  <blockquote>
    <p>(A,1)</p>
  </blockquote>
  
  <p>record where <strong>'A'</strong> is the key. now if i don't get any <strong>'A'</strong> key record in 5 mins the session is dropped.</p>
  
  <p>I want to do some operation on end of session lets say <strong>(value)*2</strong> for that session. is there any way I can achieve this using Kafka Stream API</p>