se añadio websocket para terminar el remate

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

@@ -0,0 +1,52 @@
+package com.example.fercoganbackend.component;
+
+import org.springframework.stereotype.Component;
+import org.springframework.web.socket.CloseStatus;
+import org.springframework.web.socket.TextMessage;
+import org.springframework.web.socket.WebSocketSession;
+import org.springframework.web.socket.handler.TextWebSocketHandler;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArraySet;
+
+@Component
+public class EventoWebSocketHandler extends TextWebSocketHandler {
+
+    private final Map<String, Set<WebSocketSession>> sesionesPorRemate = new ConcurrentHashMap<>();
+
+    @Override
+    public void afterConnectionEstablished(WebSocketSession session) {
+        String remateId = session.getUri().getPath().split("/")[3];
+
+        sesionesPorRemate
+                .computeIfAbsent(remateId, k -> new CopyOnWriteArraySet<>())
+                .add(session);
+
+        System.out.println("[EVENTOS] Cliente conectado al remate: " + remateId);
+    }
+
+    @Override
+    public void afterConnectionClosed(WebSocketSession session, CloseStatus status) {
+        String remateId = session.getUri().getPath().split("/")[3];
+        sesionesPorRemate.getOrDefault(remateId, Set.of()).remove(session);
+        System.out.println("[EVENTOS] Cliente desconectado: " + remateId);
+    }
+
+    public void enviarEvento(String remateId, String mensaje) {
+        Set<WebSocketSession> sesiones = sesionesPorRemate.get(remateId);
+        if (sesiones == null) return;
+
+        for (WebSocketSession session : sesiones) {
+            try {
+                if (session.isOpen()) {
+                    session.sendMessage(new TextMessage(mensaje));
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}
+