[Updated] Finished Frontend, Added statushandling to backend and frontend [Todo: session token handling at lvl 2]

backend/src/main/java/com/ninjaws/quiz/services/QueueService.java

@@ -15,10 +15,14 @@ public class QueueService {
      * Executes them in order, one every 5 seconds (the limit of the external API)
      * Removes them from the Queue when the request was succesful
      */
-    private final BlockingQueue<Request> requests = new LinkedBlockingQueue<>();
+    private final BlockingQueue<Request> requests = new LinkedBlockingQueue<>(5);
 
-    public void addToQueue(Request request) {
-        requests.add(request);
+    /**
+     * Offer automatically doesn't add it to the queue if it is full, so no Exceptions thrown
+     * @return Whether it's possible to add the request to the queue
+     */
+    public boolean addToQueue(Request request) {
+        return requests.offer(request);
     }
 
     public Request popFromQueue() {