add metrics websocket

src/main/java/xyz/mcutils/backend/config/WebSocketConfig.java

@@ -0,0 +1,22 @@
+package xyz.mcutils.backend.config;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.socket.config.annotation.EnableWebSocket;
+import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
+import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
+import xyz.mcutils.backend.service.MetricService;
+import xyz.mcutils.backend.websocket.MetricsWebSocketHandler;
+
+@Configuration
+@EnableWebSocket
+public class WebSocketConfig implements WebSocketConfigurer {
+
+    @Autowired
+    private MetricService metricService;
+
+    @Override
+    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
+        registry.addHandler(new MetricsWebSocketHandler(metricService), "/websocket/metrics").setAllowedOrigins("*");
+    }
+}