WWF：SqlWorkflowInstanceStoreBehavior 与 SqlWorkflowInstanceStore

Question

我有一个 Windows 服务包装了一个 WCF 服务，它包含一个运行活动的 WorkflowApplication。我还配置了 SQL Server 2008 Express（我知道，它接近 EOL，但文档明确指出仅支持 SQL Server 2005 或 SQL Server 2008）来托管数据库和连接 有效 。更清楚： Activity 的整个过程完成并接收 return （我通过包装在 PowerShell 中的 WCF 客户端调用它）。

我遇到的问题是我在 ServiceHost 上配置了 SqlWorkflowInstanceStoreBehavior 并且在 WorkflowApplication 上配置了 SqlWorkflowInstanceStore。这些都不会引发 SQL 异常，但我 认为 ServiceHost 正在采取预防措施，因为我所看到的只是 LockOwnersTable 上的单个条目。

来自 Windows 服务的代码：

        this.obj = new ServiceHost(typeof(WorkflowService));
        SqlWorkflowInstanceStoreBehavior instanceStoreBehavior = new SqlWorkflowInstanceStoreBehavior("Server=.\SQL2008EXPRESS;Initial Catalog=WorkflowInstanceStore;Integrated Security=SSPI")
        {
            HostLockRenewalPeriod = TimeSpan.FromSeconds(5),
            InstanceCompletionAction = InstanceCompletionAction.DeleteNothing,
            InstanceLockedExceptionAction = InstanceLockedExceptionAction.AggressiveRetry,
            InstanceEncodingOption = InstanceEncodingOption.GZip,
            RunnableInstancesDetectionPeriod = TimeSpan.FromSeconds(2)
        };
        this.obj.Description.Behaviors.Add(instanceStoreBehavior);
        this.obj.Open();

来自 WCF 的代码 Service/WorkflowApplication:

        SqlWorkflowInstanceStore newSqlWorkflowInstanceStore = new SqlWorkflowInstanceStore("Server=.\SQL2008EXPRESS;Initial Catalog=WorkflowInstanceStore;Integrated Security=SSPI")
                                                        {
                                                            EnqueueRunCommands = true,
                                                            HostLockRenewalPeriod = TimeSpan.FromSeconds(5),
                                                            InstanceCompletionAction = InstanceCompletionAction.DeleteNothing,
                                                            InstanceLockedExceptionAction = InstanceLockedExceptionAction.BasicRetry,
                                                            RunnableInstancesDetectionPeriod = TimeSpan.FromSeconds(5)
                                                        };
        InstanceHandle workflowInstanceStoreHandle = newSqlWorkflowInstanceStore.CreateInstanceHandle();
        CreateWorkflowOwnerCommand createWorkflowOwnerCommand = new CreateWorkflowOwnerCommand();
        InstanceView newInstanceView = newSqlWorkflowInstanceStore.Execute(workflowInstanceStoreHandle, createWorkflowOwnerCommand, TimeSpan.FromSeconds(30));
        newSqlWorkflowInstanceStore.DefaultInstanceOwner = newInstanceView.InstanceOwner;

        // Now stage the WorkflowApplication, using the SQL instance.
        AutoResetEvent syncEvent = new AutoResetEvent(false);
        WorkflowApplication newWorkflowApplication = new WorkflowApplication(unwrappedActivity)
                                                         {
                                                             InstanceStore = newSqlWorkflowInstanceStore
                                                         };

问题：

1. ServiceHost SqlWorkflowInstanceStoreBehavior 是否覆盖 WorkflowApplication 上的 SqlWorkflowInstanceStore？如果是这样，显而易见的答案是删除 ServiceHost 上的 SqlWorkflowInstanceStoreBehavior；然而，正如之前推断的那样，我担心这将证明是徒劳的，因为 WorkflowApplication 目前没有记录任何东西（据我所知，甚至没有尝试记录）。

2. ASAppInstanceService 似乎特定于 WindowsServer。如果 ServiceHost（通过 Windows 服务选项）总是 将 Windows 10 托管那些（对于 dev/pre-production）是可能的=44=] WorkflowApplication 从进行 SQL 调用？

Answer 1

找出答案：

newWorkflowApplication.Persist();