title: Symfony2 request event
body: <p>I am trying to execute a task on every request with Symfony2, so far I have no idea how to achieve this. My idea is simple - I need to check a session variable on authenticated user on every request this user makes. The main reason to do this is to provide functionality that is available for certain periods of time. Can you point me into the right direction ? Or does anyone have better idea for such kind of functionality ? Thanks.</p>