title: Listener for server starup and all spring bean loaded completely
body: <p>In my web application, I want to create Listener which will get notified when my server get started and all bean get loaded.
  In that Listener, I want to call a service method.
  I used <code>ServletContextListener</code>. 
  it has <code>contextInitialized</code> method but it does not work in my case. it get involked when server get started but before spring bean creation.
  so I get instance of service class as null. 
  Is there other way to create Listener.</p>