title: Securing Web Flow in Grails using Spring Security
body: <p>According to <a href="http://static.springsource.org/spring-webflow/docs/2.0.x/reference/html/ch07.html" rel="nofollow">Spring Web Flow docs</a> it is possible to secure flow states using <a href="http://static.springsource.org/spring-webflow/docs/2.0.x/reference/html/ch07s04.html" rel="nofollow">SecurityFlowExecutionListener</a></p>
  
  <p>How can I do it in Grails ?</p>
  
  <p>I am trying to achieve demanding authentification in the middle of the flow.</p>