feat: websocket basic frame built

src/main/java/xin/merlin/myplayerbackend/utils/websocket/WebSocketSessionManager.java

@@ -0,0 +1,41 @@
+package xin.merlin.myplayerbackend.utils.websocket;
+
+
+import org.springframework.stereotype.Component;
+import org.springframework.web.socket.TextMessage;
+import org.springframework.web.socket.WebSocketSession;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+@Component
+public class WebSocketSessionManager {
+
+    private static final Map<Integer, WebSocketSession> websocketSessions = new ConcurrentHashMap<>();
+
+    public void addSession(Integer id, WebSocketSession session) {websocketSessions.put(id, session);}
+
+    public WebSocketSession getSession(Integer id) {return websocketSessions.get(id);}
+
+    public void removeSession(Integer id) {websocketSessions.remove(id);}
+
+    public Map<Integer, WebSocketSession> getSessions() {return websocketSessions;}
+
+    public void sendToUser(Integer userId, String message) throws IOException {
+        WebSocketSession session = websocketSessions.get(userId);
+        if (session != null && session.isOpen()) {
+            session.sendMessage(new TextMessage(message));
+        }
+    }
+
+    public void broadcast(String message) throws IOException {
+        for (WebSocketSession session : websocketSessions.values()) {
+            if (session.isOpen()) {
+                session.sendMessage(new TextMessage(message));
+            }
+        }
+    }
+
+
+}