Appfabric WF4-WCF services, how to get current url without httpcontext?

Question

I developed wf-wcf services with code activity, and in this I want to get the current service url. If I turn off the appfabric persistence feature, I can get the url using

HttpContext.Current.Request.Url.ToString() 

If the save function is saved, then httpcontext is null.

Is there any other way to get the WCF url where my code activity is stored?

Answer 1

You need to implement IReceiveMessageCallback and add this to the activity context. In OnReceiveMessage, you get the current CurrentContext, which allows you to check the incoming message.

That . WF4 examples show how to do this.

Code example:

 using System.Activities; using System.Runtime.Serialization; using System.ServiceModel; using System.ServiceModel.Activities; namespace DeclarativeServiceLibrary2 { public sealed class GetWCFMessageTo : NativeActivity { public Receive Receive { get; set; } public OutArgument<string> WcfTo { get; set; } protected override void Execute(NativeActivityContext context) { context.Properties.Add("ReceiveMessageCallback", new ReceiveMessageCallback()); context.ScheduleActivity(Receive, CompletionCallback); } private void CompletionCallback(NativeActivityContext context, ActivityInstance completedInstance) { var receiveMessageCallback = context.Properties.Find("ReceiveMessageCallback") as ReceiveMessageCallback; WcfTo.Set(context, receiveMessageCallback.WcfRequestTo); } } [DataContract] class ReceiveMessageCallback : IReceiveMessageCallback { public string WcfRequestTo { get; private set; } public void OnReceiveMessage(OperationContext operationContext, ExecutionProperties activityExecutionProperties) { WcfRequestTo = operationContext.RequestContext.RequestMessage.Headers.To.ToString(); } } } 

and XAMLX Workflow Example

 <WorkflowService mc:Ignorable="sap" ConfigurationName="Service1" sap:VirtualizedContainerService.HintSize="307,306" Name="Service1" mva:VisualBasic.Settings="Assembly references and imported namespaces serialized as XML namespaces" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/servicemodel" xmlns:d="clr-namespace:DeclarativeServiceLibrary2;assembly=DeclarativeServiceLibrary2" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mv="clr-namespace:Microsoft.VisualBasic;assembly=System" xmlns:mva="clr-namespace:Microsoft.VisualBasic.Activities;assembly=System.Activities" xmlns:p="http://tempuri.org/" xmlns:p1="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:s1="clr-namespace:System;assembly=System" xmlns:s2="clr-namespace:System;assembly=System.Xml" xmlns:s3="clr-namespace:System;assembly=System.Core" xmlns:s4="clr-namespace:System;assembly=System.ServiceModel" xmlns:sa="clr-namespace:System.Activities;assembly=System.Activities" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:sap="http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation" xmlns:scg="clr-namespace:System.Collections.Generic;assembly=System" xmlns:scg1="clr-namespace:System.Collections.Generic;assembly=System.ServiceModel" xmlns:scg2="clr-namespace:System.Collections.Generic;assembly=System.Core" xmlns:scg3="clr-namespace:System.Collections.Generic;assembly=mscorlib" xmlns:sd="clr-namespace:System.Data;assembly=System.Data" xmlns:sl="clr-namespace:System.Linq;assembly=System.Core" xmlns:st="clr-namespace:System.Text;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <p1:Sequence DisplayName="Sequential Service" sad:XamlDebuggerXmlReader.FileName="c:\temp\DeclarativeServiceLibrary2\DeclarativeServiceLibrary2\Service1.xamlx" sap:VirtualizedContainerService.HintSize="277,276" mva:VisualBasic.Settings="Assembly references and imported namespaces serialized as XML namespaces"> <p1:Sequence.Variables> <p1:Variable x:TypeArguments="CorrelationHandle" Name="handle" /> <p1:Variable x:TypeArguments="x:Int32" Name="data" /> <p1:Variable x:TypeArguments="x:String" Name="WcfRequestTo" /> </p1:Sequence.Variables> <sap:WorkflowViewStateService.ViewState> <scg3:Dictionary x:TypeArguments="x:String, x:Object"> <x:Boolean x:Key="IsExpanded">True</x:Boolean> </scg3:Dictionary> </sap:WorkflowViewStateService.ViewState> <d:GetWCFMessageTo sap:VirtualizedContainerService.HintSize="255,22" WcfTo="[WcfRequestTo]"> <d:GetWCFMessageTo.Receive> <Receive x:Name="__ReferenceID0" CanCreateInstance="True" DisplayName="ReceiveRequest" sap:VirtualizedContainerService.HintSize="255,90" OperationName="GetData" ServiceContractName="p:IService"> <Receive.CorrelationInitializers> <RequestReplyCorrelationInitializer CorrelationHandle="[handle]" /> </Receive.CorrelationInitializers> <ReceiveMessageContent> <p1:OutArgument x:TypeArguments="x:Int32">[data]</p1:OutArgument> </ReceiveMessageContent> </Receive> </d:GetWCFMessageTo.Receive> </d:GetWCFMessageTo> <SendReply Request="{x:Reference __ReferenceID0}" DisplayName="SendResponse" sap:VirtualizedContainerService.HintSize="255,90"> <SendMessageContent> <p1:InArgument x:TypeArguments="x:String">["Received " &amp; data &amp; " WCF To header: " &amp; WcfRequestTo]</p1:InArgument> </SendMessageContent> </SendReply> </p1:Sequence> </WorkflowService>