1.点歌支付防抖

2.点歌记录倒序
3.下单同步保存库存记录

src/main/java/com/chaozhanggui/system/cashierservice/redis/RedisCst.java

@@ -25,4 +25,5 @@ public class RedisCst {
     // 创建订单锁
     public static final String CREATE_ORDER_LOCK = "CREATE_ORDER_LOCK:";
     public static final String SEND_STOCK_WARN_MSG = "SEND_STOCK_WARN_MSG:";
+    public static final String SONG_PAY_LOCK = "song_pay_lock:";
 }