feat: introduce middleware rabbitmq and redis

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

@@ -0,0 +1,42 @@
+package xin.merlin.myplayerbackend.utils.websocket;
+
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONObject;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.amqp.rabbit.annotation.RabbitListener;
+import org.springframework.stereotype.Component;
+import xin.merlin.myplayerbackend.config.RabbitMQConfig;
+import xin.merlin.myplayerbackend.utils.websocket.command.CommandDispatcher;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class WebSocketMessageConsumer {
+
+    private final WebSocketSessionManager sessionManager;
+
+    private final CommandDispatcher commandDispatcher;
+
+    @RabbitListener(queues = RabbitMQConfig.WS_MESSAGE_QUEUE)
+    public void onMessage(String json) {
+        try {
+            JSONObject msg = JSON.parseObject(json);
+
+            String to = msg.getString("to");
+
+            if (to == null || to.isEmpty()) {
+                // 这是广播 / 系统消息
+                sessionManager.broadcast(json);
+            } else {
+                // 单发消息
+//                sessionManager.sendToUser(Integer.valueOf(to), json);
+                commandDispatcher.dispatch(msg);
+            }
+
+        } catch (Exception e) {
+            log.info(e.getMessage());
+        }
+    }
+}
+