我将veeeery简单工作流作为服务托管。我只想处理这个工作流程中的异常。
我的工作流将'string'作为参数,并尝试将其强制转换为int。因此,每当我发送像'asasafs'这样的数据时,它都会失败并抛出异常。很简单:)
我已经读过我可以创建自己的WorkflowServiceHostFactory,但不幸的是我无法完成我的简单任务,这是我的实现:
public class MyServiceHostFactory : System.ServiceModel.Activities.Activation.WorkflowServiceHostFactory
{
protected override WorkflowServiceHost CreateWorkflowServiceHost(Activity activity, Uri[] baseAddresses)
{
return base.CreateWorkflowServiceHost(activity, baseAddresses);
}
protected override WorkflowServiceHost CreateWorkflowServiceHost(WorkflowService service, Uri[] baseAddresses)
{
var host = base.CreateWorkflowServiceHost(service, baseAddresses);
WorkflowRuntimeBehavior wrb = host.Description.Behaviors.Find<WorkflowRuntimeBehavior>();
if (wrb == null)
wrb = new WorkflowRuntimeBehavior();
wrb.WorkflowRuntime.ServicesExceptionNotHandled += WorkflowRuntime_ServicesExceptionNotHandled;
wrb.WorkflowRuntime.Started += WorkflowRuntime_Started;
wrb.WorkflowRuntime.WorkflowCompleted += WorkflowRuntime_WorkflowCompleted;
host.Description.Behaviors.RemoveAll<WorkflowRuntimeBehavior>();
host.Description.Behaviors.Add(wrb);
host.Faulted += host_Faulted;
host.UnknownMessageReceived += host_UnknownMessageReceived;
return host;
}
void workflowRuntime_WorkflowCreated(object sender, WorkflowEventArgs e)
{
throw new NotImplementedException();
}
void WorkflowRuntime_WorkflowCompleted(object sender, System.Workflow.Runtime.WorkflowCompletedEventArgs e)
{
throw new NotImplementedException();
}
void WorkflowRuntime_Started(object sender, System.Workflow.Runtime.WorkflowRuntimeEventArgs e)
{
throw new NotImplementedException();
}
void WorkflowRuntime_ServicesExceptionNotHandled(object sender, System.Workflow.Runtime.ServicesExceptionNotHandledEventArgs e)
{
throw new NotImplementedException();
}
void host_UnknownMessageReceived(object sender, System.ServiceModel.UnknownMessageReceivedEventArgs e)
{
throw new NotImplementedException();
}
void host_Faulted(object sender, EventArgs e)
{
throw new NotImplementedException();
}
}
我正在使用Visual Studio 2k10和iisexpress,并且每当工作流抛出异常时,调试器都不会破坏我的任何事件处理程序。 你知道怎么做得好吗?
答案 0 :(得分:1)
这实际上取决于你想要做什么。对于向工作流发送SOAP消息的人使用标准WCF堆栈,因此使用IErrorHandler或消息检查器,您应该能够看到错误被返回给客户端。
然而,这只是故事的一部分。将响应发送回客户端时,不会执行工作流。相反,只要它有任何工作要做,它就会继续执行。因为在发送对客户端的响应之后,WCF堆栈不会向您显示发生的任何错误。
相反,使用TrackingParticipant并检查FaultPropagationRecord将告诉您任何活动本身未处理的异常。它仍可能由TryCatch活动处理。检查WorkflowInstanceUnhandledExceptionRecord告诉您该异常未在工作流中处理并一直传播到运行时。