PersistableIdle事件和WorkflowApplication.Load多线程问题 [英] PersistableIdle event and WorkflowApplication.Load multithreading issues

问题描述

你好

我是Workflow Foundation的新手，并且遇到了以下问题.

问题1-调用完成后返回Unload时，PersistableIdle事件不会触发Unload事件

我正在托管自己的工作流，但没有使用WorkflowServiceHost.

我已经创建了一个工作流程，并且在单线程环境中一切正常.

当我处理同一个工作流程的多个实例时，PersistableIdle事件完成，并且我返回Unload，但从未触发Unload事件.我为每个工作流程实例和每个WorkflowApplication创建了单独的WorkflowApplication 共享同一个SqlWorkflowInstanceStore.

为什么会发生这种情况，我没有任何错误吗?

问题2-WorkflowApplication.Load事件挂起

在多线程环境中运行时，线程挂在WorkflowApplication.Load方法内部.

有任何想法为什么会发生这种情况，再次我没有收到任何错误消息?

解决方案

将其放入web.config文件中，并查看日志是否有帮助.

 < system.diagnostics>
    < sources>
     <源名称="System.Activities"； switchValue =信息">
       <侦听器>
         < add name =" textListener" />
         <删除名称=默认"； />
       </listeners>
     </source>
    </sources>
    < sharedListeners>
     < add name =" textListener"
         类型="System.Diagnostics.TextWriterTraceListener"
          initializeData ="MyTraceLog.txt"
          traceOutputOptions ="ProcessId，DateTime"； />
    </sharedListeners>
    < trace autoflush ="true"； indentsize ="4">
     <侦听器>
       < add name =" textListener" />
     </listeners>
    </trace>
  </system.diagnostics>

尝试将Persist保持并加载到外部交通(如果有)之外.

使用(var ts = new System.Transactions.TransactionScope(TransactionScopeOption.Suppress)){
            m_WorkflowApplication.Persist/Load();
            ts.Complete();
           }

当wf闲置时(通常是对于armourark)，将调用PersistableIdle，而在卸载wf或wf端时不会调用PersistableIdle.

HTH

e.s.

Hello,

I'm new to Workflow Foundation and I've encountered the following problems.

Problem 1 - PersistableIdle event does not fire the Unload event when I return Unload after the call has finished

I'm hosting my own Workflows and I'm not using the WorkflowServiceHost.

I've got one workflow that I've created and everythings works as I expect in a single threaded environment.

When I am processing more than one instance of the same workflow the PersistableIdle event completes and I return Unload but the Unload event never fires. I've created separate WorkflowApplication for each workflow instance, and each WorkflowApplication is sharing the same SqlWorkflowInstanceStore.

Any ideas why this could happen, I don't get any errors?

Problem 2 - WorkflowApplication.Load event hangs

When running in a multi-threaded environment the thread hangs inside WorkflowApplication.Load method.

Any ideas why this could happen, again I don't get any errors?

解决方案

put this in the web.config file and see if the logs helps.

 <system.diagnostics>
    <sources>
      <source name="System.Activities" switchValue="Information">
        <listeners>
          <add name="textListener" />
          <remove name="Default" />
        </listeners>
      </source>
    </sources>
    <sharedListeners>
      <add name="textListener"
           type="System.Diagnostics.TextWriterTraceListener"
           initializeData="MyTraceLog.txt"
           traceOutputOptions="ProcessId, DateTime" />
    </sharedListeners>
    <trace autoflush="true" indentsize="4">
      <listeners>
        <add name="textListener" />
      </listeners>
    </trace>
  </system.diagnostics>

try putting Persist and load outside trabsactions (if any).

using (var ts = new System.Transactions.TransactionScope(TransactionScopeOption.Suppress)) {
              m_WorkflowApplication.Persist/Load();
              ts.Complete();
            }

PersistableIdle is called when the wf goes idle (for a boomark typically) ,, it is not called when you unload a wf or the wf end.

HTH

e.s.

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