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POTrying to get Persistence Participant Promotion to work with a xamlx service in WF4
 

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  1. POTrying to get Persistence Participant Promotion to work with a xamlx service in WF4
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    <p>I have implemented workflow persistence participant promotion, just as it shown here on Microsoft's website:http://msdn.microsoft.com/en-us/library/ee364726%28VS.100%29.aspx and while everything seems like everything works. I do not see the data saving to the database when I query? I think I am missing a step or microsoft missed something.</p> <p>I am using a workflow application .xamlx service and I have overridden the WorkflowServiceHost. This all seems to be working fine, So I am not sure where the problem can be?</p> <p>So my question here is does anyone have a real working example of how to implement a persistence participant? </p> <p>I tried a few different takes on this</p> <ul> <li>Andrew Zhu's here <a href="http://xhinker.com/post/WF4Promote-persistence-Data.aspx" rel="nofollow">http://xhinker.com/post/WF4Promote-persistence-Data.aspx</a></li> <li>Microsoft Samples</li> </ul> <p>But I just cannot seem to get this to work.</p> <p><strong>Just FYI-This code works when I changed the xnamespaces to match. Thanks to Maurice</strong></p> <p>WorkflowServiceHost Code:</p> <pre><code>public class ServiceHostFactory :WorkflowServiceHostFactory { private static readonly string m_connectionString = "Data Source=localhost;Initial Catalog=WorkflowInstanceStore;Integrated Security=True"; protected override WorkflowServiceHost CreateWorkflowServiceHost(Activity activity, Uri[] baseAddresses) { return base.CreateWorkflowServiceHost(activity, baseAddresses); } protected override WorkflowServiceHost CreateWorkflowServiceHost(WorkflowService service, Uri[] baseAddresses) { WorkflowServiceHost host = base.CreateWorkflowServiceHost(service, baseAddresses); host.DurableInstancingOptions.InstanceStore = SetupInstanceStore(); SqlWorkflowInstanceStoreBehavior sqlWorkflowInstanceStoreBehavior = new SqlWorkflowInstanceStoreBehavior(m_connectionString); XNamespace xNS = XNamespace.Get("http://contoso.com/DocumentStatus"); List&lt;XName&gt; variantProperties = new List&lt;XName&gt;() { xNS.GetName("UserName"), xNS.GetName("ApprovalStatus"), xNS.GetName("DocumentId"), xNS.GetName("LastModifiedTime") }; sqlWorkflowInstanceStoreBehavior.Promote("DocumentStatus", variantProperties, null); host.Description.Behaviors.Add(sqlWorkflowInstanceStoreBehavior); //Add persistence extension here: host.WorkflowExtensions.Add&lt;DocumentStatusExtension&gt;(()=&gt;new DocumentStatusExtension());; host.Description.Behaviors.Add(new ServiceMetadataBehavior() { HttpGetEnabled = true }); // Handle the UnknownMessageReceived event. host.UnknownMessageReceived += delegate(object sender, UnknownMessageReceivedEventArgs e) { Console.WriteLine(string.Format(CultureInfo.InvariantCulture, "Unknow Message Recieved:{0}", e.Message)); }; return host; } private static SqlWorkflowInstanceStore SetupInstanceStore() { SqlWorkflowInstanceStore sqlWorkflowInstanceStore = new SqlWorkflowInstanceStore(m_connectionString) { InstanceCompletionAction = InstanceCompletionAction.DeleteAll, InstanceLockedExceptionAction = InstanceLockedExceptionAction.BasicRetry, HostLockRenewalPeriod = System.TimeSpan.Parse("00:00:05") }; InstanceHandle handle = sqlWorkflowInstanceStore.CreateInstanceHandle(); //InstanceHandle handle = sqlWorkflowInstanceStore.CreateInstanceHandle(); //InstanceView view = sqlWorkflowInstanceStore.Execute(handle, new CreateWorkflowOwnerCommand(), TimeSpan.FromSeconds(30)); //handle.Free(); //sqlWorkflowInstanceStore.DefaultInstanceOwner = view.InstanceOwner; return sqlWorkflowInstanceStore; } </code></pre> <p>DocumentStatusExtension Code:</p> <pre><code> public string DocumentId; public string ApprovalStatus; public string UserName; public DateTime LastUpdateTime; private XNamespace xNS = XNamespace.Get("http://contoso.com/"); protected override void CollectValues(out IDictionary&lt;XName, object&gt; readWriteValues, out IDictionary&lt;XName, object&gt; writeOnlyValues) { readWriteValues = new Dictionary&lt;XName, object&gt;(); readWriteValues.Add(xNS.GetName("UserName"), this.UserName); readWriteValues.Add(xNS.GetName("ApprovalStatus"), this.ApprovalStatus); readWriteValues.Add(xNS.GetName("DocumentId"), this.DocumentId); readWriteValues.Add(xNS.GetName("LastModifiedTime"), this.LastUpdateTime); writeOnlyValues = null; } protected override IDictionary&lt;XName, object&gt; MapValues(IDictionary&lt;XName, object&gt; readWriteValues, IDictionary&lt;XName, object&gt; writeOnlyValues) { return base.MapValues(readWriteValues, writeOnlyValues); } </code></pre> <p>UpdateExtension Code:</p> <pre><code>public sealed class UpdateExtension : CodeActivity { // Define an activity input argument of type string public InArgument&lt;string&gt; Text { get; set; } // If your activity returns a value, derive from CodeActivity&lt;TResult&gt; // and return the value from the Execute method. protected override void Execute(CodeActivityContext context) { // Obtain the runtime value of the Text input argument context.GetExtension&lt;DocumentStatusExtension&gt;().DocumentId = Guid.NewGuid().ToString(); context.GetExtension&lt;DocumentStatusExtension&gt;().UserName = "John Smith"; context.GetExtension&lt;DocumentStatusExtension&gt;().ApprovalStatus = "Approved"; context.GetExtension&lt;DocumentStatusExtension&gt;().LastUpdateTime = DateTime.Now; } } </code></pre>
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