title: Symfony - redirect client to new route through event subscriber
body: <p>I'm trying to redirect clients sitting on a certain route, whenever another specific client presses a button in their view. My plan is this:  </p>
  
  <ul>
  <li>Client 1 presses a button to invoke a request to route A</li>
  <li>Controller that defines route A invokes a method in service B</li>
  <li>Service B executes some other operations, then dispatches event C</li>
  <li>Subscriber of event C does ??? to redirect client 2 &amp; 3, who are currently both on route D, to route E</li>
  </ul>
  
  <p>I'm unsure, whether it's actually possible to redirect clients based on the route they are on or whether I need to store some sort of session information to reference each client that needs to be redirected.</p>