title: Spring Service default scope
body: <p>Which is the default scope of a <strong>Spring 4</strong> <code>@Service</code>?</p>
  
  <p>Does it make sense designing a <em>Service</em> implementation to store info about the current logged user (according to the current <strong>HTTP session</strong>), through <em>class attributes</em> (also by using the <code>final</code> modifier)?</p>