update 定时任务计划相关

Api/Ewide.Core/Service/Cache/ISysCacheService.cs

@@ -19,5 +19,6 @@ namespace Ewide.Core.Service
         Task<bool> SetAsync(string key, object value);
         Task<string> GetAsync(string key);
         Task<T> GetAsync<T>(string key);
+        bool Exists(string cacheKey);
     }
 }

Api/Ewide.Core/Service/Cache/SysCacheService.cs

@@ -174,5 +174,16 @@ namespace Ewide.Core.Service
         {
             await _cache.SetAsync(CommonConst.CACHE_AREA_CODE, areaCodes);
         }
+
+        /// <summary>
+        /// 检查给定 key 是否存在
+        /// </summary>
+        /// <param name="cacheKey">键</param>
+        /// <returns></returns>
+        [NonAction]
+        public bool Exists(string cacheKey)
+        {
+            return _cache.Equals(cacheKey);
+        }
     }
 }