auth listo y contador terminados

src/main/java/com/example/fercoganbackend/component/ContadorWebSocketHandler.java

@@ -0,0 +1,34 @@
+package com.example.fercoganbackend.component;
+
+// ContadorWebSocketHandler.java
+import org.springframework.stereotype.Component;
+import org.springframework.web.socket.*;
+import org.springframework.web.socket.handler.TextWebSocketHandler;
+
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+@Component
+public class ContadorWebSocketHandler extends TextWebSocketHandler {
+    private final List<WebSocketSession> sessions = new CopyOnWriteArrayList<>();
+
+    @Override
+    public void afterConnectionEstablished(WebSocketSession session) {
+        sessions.add(session);
+    }
+
+    @Override
+    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) {
+        sessions.remove(session);
+    }
+
+    public void broadcast(String message) {
+        for (WebSocketSession session : sessions) {
+            try {
+                session.sendMessage(new TextMessage(message));
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}