refactor: SQL日志任务增加暂停逻辑

#Comment
防止任务暂停期间日志占用大量内存

src/admin/Bootstrap.Admin/Controllers/Api/TasksController.cs

@@ -1,4 +1,5 @@
-using Longbow.Tasks;
+using Bootstrap.DataAccess;
+using Longbow.Tasks;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using System.Collections.Generic;
@@ -34,6 +35,13 @@ namespace Bootstrap.Admin.Controllers.Api
         {
             var sche = TaskServicesManager.Get(scheName);
             if (sche != null) sche.Status = operType == "pause" ? SchedulerStatus.Disabled : SchedulerStatus.Running;
+
+            // SQL 日志任务特殊处理
+            if (scheName == "SQL日志")
+            {
+                if (operType == "pause") LogHelper.Pause();
+                else LogHelper.Run();
+            }
             return true;
         }
     }

src/admin/Bootstrap.DataAccess/Helper/LogHelper.cs

@@ -49,12 +49,23 @@ namespace Bootstrap.DataAccess
         /// <param name="log"></param>
         public static System.Threading.Tasks.Task AddDBLog(DBLog log) => System.Threading.Tasks.Task.Run(() =>
         {
-            if (!_messageQueue.IsAddingCompleted)
+            if (!_messageQueue.IsAddingCompleted && !_pause)
             {
                 _messageQueue.Add(log);
             }
         });
 
+        private static bool _pause;
+        /// <summary>
+        /// 暂停接收脚本执行日志
+        /// </summary>
+        public static void Pause() => _pause = true;
+
+        /// <summary>
+        /// 开始接收脚本执行日志
+        /// </summary>
+        public static void Run() => _pause = false;
+
         /// <summary>
         /// 查询所有SQL日志信息
         /// </summary>
@@ -80,7 +91,8 @@ namespace Bootstrap.DataAccess
                 var logs = new List<DBLog>();
                 while (_messageQueue.TryTake(out var log))
                 {
-                    logs.Add(log);
+                    if (log != null) logs.Add(log);
+                    if (logs.Count >= 100) break;
                 }
                 if (logs.Any())
                 {