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Guerrilla Enterprise .NET Copenhagen

For those that attended the Guerrilla Enterprise .NET course last week in Copenhagen and didn't get a change to download all the sample you can download all the demos Richard Blewett, Dominick Baier and I wrote from here . And thanks for being there, it was a fun event :)

Posted to The Problem Solver by Maurice on Sun, May 15 2011
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010, AppFabric, Azure
SqlWorkflowInstanceStore and SQL Azure

Some time ago I blogged about how to get the SqlWorkflowInstanceStore working with SQL Azure. In order for this to work we had to make a few changes to the SqlWorkflowInstanceStoreSchema.sql script and as a result we ended up in a working but officially not supported scenario. And while this worked just...

Posted to The Problem Solver by Maurice on Mon, Apr 18 2011
Filed under: Filed under: .NET, Workflow, WF4, VS2010, AppFabric, Azure
WF4 State Machine in the Multi-Targeting Pack for Microsoft .NET Framework 4 Platform Update 1

Lots of people like to use the state machine model workflow as this is a very flexible way of working that often fits in with how real work processes work. With WF3 we had a state machine workflow but with WF4 this was not ready in time and as a result we didn’t get to use this model. There where a few...

Posted to The Problem Solver by Maurice on Mon, Apr 11 2011
Filed under: Filed under: .NET, Workflow, WF4, VS2010, AppFabric, Azure
Scheduling child activities with input parameters

A question on StackOverflow about scheduling child activities with some additional input parameters made me remember that this is kind on not obvious to figure out and even though I new the answer I had to think hard before I could code up a demo. So I figured I might as well post it on my blog for future...

Posted to The Problem Solver by Maurice on Tue, Apr 5 2011
Filed under: Filed under: .NET, Workflow, WF4, VS2010
Workflow Services and Windows Phone 7

Today I did a fun presentation at the Engineering World Conference in the Netherlands on using the Windows Phone 7 with a Workflow Service hosted on Windows Azure. The sample application, that is complete with all source on CodePlex over here , consists of an expense app on the phone and an ASP.NET MVC...

Posted to The Problem Solver by Maurice on Sat, Feb 5 2011
Filed under: Filed under: .NET, Workflow, WCF, WF4, ASP.NET, VS2010, WP7, AppFabric, DotNed, Azure
The SqlWorkflowInstanceStore and Windows Azure

As shown previously it isn’t hard to run Workflow Services on Windows Azure. In fact all we need to do is add a bit of extra configuration and we can work as normal. However normally when I am hosting long running workflows in IIS I always add a SqlWorkflowInstanceStore to store the workflow state...

Posted to The Problem Solver by Maurice on Thu, Jan 20 2011
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010, AppFabric
Running Workflow Services on Windows Azure

Windows Azure might not support the WCF and WF4 hosting parts of Windows AppFabric bit that doesn’t mean you can’t run workflow services on Windows Azure. After all a workflow is just a .NET 4 type and Windows Azure runs the .NET framework. As a result running a workflow service is quite easy once you...

Posted to The Problem Solver by Maurice on Tue, Jan 18 2011
Filed under: Filed under: .NET, Workflow, WCF, WF4, ASP.NET, VS2010, AppFabric, Azure
CodeCast interview on Windows Workflow Foundation

Ken Levy recently interviewed me for CodeCast on the state of Windows Workflow Foundation 4 and the AppFabric for hosting your workflow services. Its episode 99, I wonder what they are planning for episode 100. You can download the episode here or through iTunes. Enjoy! www.TheProblemSolver.nl...

Posted to The Problem Solver by Maurice on Thu, Jan 13 2011
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010, Futures, AppFabric, Podcast
Doing synchronous workflow execution using the WorkflowApplication

The WorkflowApplication is a great way to execute your workflows in process. Usually the fact that the WorkflowApplication is asynchronous is a great thing but there are cases when a little more synchronous execution is nice. For example executing a workflow and updating the state of the user interface...

Posted to The Problem Solver by Maurice on Fri, Jan 7 2011
Filed under: Filed under: .NET, Workflow, WF4, VS2010
Calling Workflow Services without Add Service Reference

Sometimes you just don’t want to do an Add Service reference in the client application but still be able to to call a WF4 workflow service. The good thing is that a WF4 workflow service is just another WCF service from the client perspective so almost everything you can do with a regular WCF service...

Posted to The Problem Solver by Maurice on Tue, Nov 23 2010
Filed under: Filed under: .NET, NetFx3, Workflow, WF4, VS2010
Throttling workflow services in WF4

Windows Workflow Foundation 4 makes it real easy to create workflow services that do long running work on a server. However when we are doing long running work there could be an issue with lots of workflows being started and too many workflow instances competing for the same data and threads thereby...

Posted to The Problem Solver by Maurice on Wed, Nov 17 2010
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010
Versioning long running Workflow Services in WF4, the code

In my previous WF4 post I described the principal of how to version workflow services using the WCF 4 RoutingService. In that post I described the general problem and solution without going into a lot of detail and showing any code. In this blog post I will add an actual implementation you can use for...

Posted to The Problem Solver by Maurice on Tue, Nov 16 2010
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010
Versioning long running Workflow Services in WF4

One of the problems with the current version of Windows Workflow Foundation is how to handle different versions of your workflows. With short running workflows this is no big deal, workflows do whatever they are supposed to do and finish, and you can deploy a newer updated version of your XAMLX files...

Posted to The Problem Solver by Maurice on Thu, Nov 4 2010
Filed under: Filed under: .NET, Workflow, WCF, PDC, WF4, VS2010
Limiting which user can access service using the Windows Identity Foundation

In my previous blog post I demonstrated how to secure a workflow service using the Windows Identity Foundation. With this in place we only allow users that are trusted by the STS Dominick Baier wrote. That is nice but in some cases we might not want all users to be able to perform all actions. ...

Posted to The Problem Solver by Maurice on Mon, Sep 27 2010
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010, WIF
Securing a Workflow Service using Windows Identity Foundation

The way security is often still handled these days with each application keeping track of their own users is somewhat dated. Some form of Federated security, where a single separate server is responsible for the security of a whole series of applications, is the way to go. On the internet there are plenty...

Posted to The Problem Solver by Maurice on Fri, Sep 24 2010
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010, WIF
Using the WCF OperationContext from a Receive activity

The WF4 Receive activity shields you from a lot of the WCF pipeline. Normally that is a good thing but there are occasions where you want to know more about the incoming WCF request. Normally you can use the WCF OperationContext.Current to get at this information but with a workflow service this doesn...

Posted to The Problem Solver by Maurice on Tue, Sep 21 2010
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010
Converting a C# workflow into XAML

A interesting question that came up last week was how to convert workflows defined in C# to XAML. A co worker of one of the attendees of the Essential Windows Workflow Foundation 4 course had been experiencing a lot of problems with the workflow designer and decided to create their workflows in C# instead...

Posted to The Problem Solver by Maurice on Sat, Aug 28 2010
Filed under: Filed under: .NET, Workflow, WF4, VS2010
Workflows and no persist zones

There are times when a workflow can’t be persisted safely using a SqlWorkflowInstanceStore. The reason isn’t so much saving the state of a workflow to disk, that could be done at any time, but the result when a workflow would be reloaded from disk in that state. An easy example is a workflow handling...

Posted to The Problem Solver by Maurice on Sun, Aug 22 2010
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010
Quickly determine the windows identity of an ASP.NET site

Great tip from Dominick to quickly determine the use an ASP.NET, WCF or WF4 service is running under. Add the following ASPX file and hit it with the browser. <%@ Page %> <%= System.Security.Principal.WindowsIdentity.GetCurrent().Name %> Thanks to Dominick www.TheProblemSolver...

Posted to The Problem Solver by Maurice on Tue, May 25 2010
Filed under: Filed under: .NET, Workflow, WCF, WF4, ASP.NET, VS2010
Hiding the XAMLX from a workflow service

In Windows Workflow Foundation 4 it’s easy to create a workflow and expose it as a WCF service. But one thing is that it exposes a XAMLX endpoint to each client can see the service actually implemented as a workflow service instead of a regular service. One way to hide that is to use a regular SVC file...

Posted to The Problem Solver by Maurice on Tue, May 18 2010
Filed under: Filed under: .NET, Workflow, WCF, WF4, VS2010

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