判断上一个空托入库写入后，线程还读取到，造成重复请求

pang.jiabao

2024-09-23 e21af5e638d3a13129be1d4762a1f3900b237515

 src/main/java/com/zy/core/cache/MessageQueue.java

@@ -92,7 +92,11 @@
            case Barcode:
                return BARCODE_EXCHANGE.get(id).poll();
            case Led:
                return LED_EXCHANGE.get(id).poll();
                try {
                    return LED_EXCHANGE.get(id).poll();
                }catch (Exception e) {

                }
            case Scale:
                return SCALE_EXCHANGE.get(id).poll();
            case Car: