1.增加CancellationToken用于任务取消

2.修复在多任务执行情况下因取消或覆盖任务导致的调用bug

src/DotXxlJob.Core/Model/JobExecuteContext.cs

@@ -1,13 +1,17 @@
+using System.Threading;
+
 namespace DotXxlJob.Core.Model
 {
     public class JobExecuteContext
     {
-        public JobExecuteContext(IJobLogger jobLogger,string jobParameter)
+        public JobExecuteContext(IJobLogger jobLogger, string jobParameter, CancellationToken cancellationToken)
         {
             this.JobLogger = jobLogger;
             this.JobParameter = jobParameter;
+            this.cancellationToken = cancellationToken;
         }
         public string JobParameter { get; }
         public IJobLogger JobLogger { get; }
+        public CancellationToken cancellationToken { get; }
     }
 }

src/DotXxlJob.Core/Queue/JobTaskQueue.cs

@@ -44,11 +44,11 @@ namespace DotXxlJob.Core
         /// <returns></returns>
         public ReturnT Replace(TriggerParam triggerParam)
         {
-            Stop();
             while (!TASK_QUEUE.IsEmpty)
             {
                 TASK_QUEUE.TryDequeue(out _);
             }
+            Stop();
             ID_IN_QUEUE.Clear();
 
             return Push(triggerParam);
@@ -81,12 +81,12 @@ namespace DotXxlJob.Core
 
         public void Dispose()
         {
-           Stop();
             while (!TASK_QUEUE.IsEmpty)
             {
                 TASK_QUEUE.TryDequeue(out _);
             }
             ID_IN_QUEUE.Clear();
+            Stop();
         }
 
         private void StartTask()
@@ -128,7 +128,7 @@ namespace DotXxlJob.Core
 
                             _jobLogger.Log("<br>----------- xxl-job job execute start -----------<br>----------- Param:{0}", triggerParam.ExecutorParams);
 
-                           result = await Executor.Execute(triggerParam);
+                            result = await Executor.Execute(triggerParam, ct);
 
                             _jobLogger.Log("<br>----------- xxl-job job execute end(finish) -----------<br>----------- ReturnT:" + result.Code);
                         }
@@ -151,9 +151,8 @@ namespace DotXxlJob.Core
                 }
 
 
-               _cancellationTokenSource.Dispose();
+                _cancellationTokenSource?.Dispose();
                 _cancellationTokenSource = null;
-
             }, _cancellationTokenSource.Token);
 
 

src/DotXxlJob.Core/TaskExecutors/BeanTaskExecutor.cs

@@ -1,3 +1,4 @@
+using System.Threading;
 using System.Threading.Tasks;
 using DotXxlJob.Core.Model;
 
@@ -19,7 +20,7 @@ namespace DotXxlJob.Core.TaskExecutors
 
         public string GlueType { get; } = Constants.GlueType.BEAN;
 
-        public Task<ReturnT> Execute(TriggerParam triggerParam)
+        public Task<ReturnT> Execute(TriggerParam triggerParam, CancellationToken cancellationToken)
         {
             var handler = _handlerFactory.GetJobHandler(triggerParam.ExecutorHandler);
 
@@ -27,7 +28,7 @@ namespace DotXxlJob.Core.TaskExecutors
             {
                 return Task.FromResult(ReturnT.Failed($"job handler [{triggerParam.ExecutorHandler} not found."));
             }
-            var context = new JobExecuteContext(this._jobLogger, triggerParam.ExecutorParams);
+            var context = new JobExecuteContext(this._jobLogger, triggerParam.ExecutorParams, cancellationToken);
             return handler.Execute(context);
         }
     }

src/DotXxlJob.Core/TaskExecutors/ITaskExecutor.cs

@@ -1,3 +1,4 @@
+using System.Threading;
 using System.Threading.Tasks;
 using DotXxlJob.Core.Model;
 
@@ -7,6 +8,6 @@ namespace DotXxlJob.Core
     {
         string GlueType { get; }
 
-        Task<ReturnT> Execute(TriggerParam triggerParam);
+        Task<ReturnT> Execute(TriggerParam triggerParam, CancellationToken cancellationToken);
     }
 }