title: run only single thread in the method
body: <p>I have a application in Spring MVC. In controller, user can run process(has button). Process working for one hour ( name it "longProces") .
  So I want to run this method "longProces" in other thread.</p>
  
  <p>When "longProces" is running, other user (when he want to run "longProces") should get message: "this process is running" and his thread is killed (not waiting for it turn).</p>
  
  <p>What can I do this? Any idea?</p>
  
  <p>Thank for answer</p>