title: Session aware spring bean
body: <p>Is there any way to define a spring bean which will be notified when data in session has changed?</p>
  
  <p>I would also like to know pure java solution if possible. All I want is when i add/edit/delete data in httpsession then I want one java class to be notified to do some processing on that data.</p>
  
  <p>Thanks</p>