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It has been a long time since my last blog post.  It certainly hasn’t been for a lack of content but it is amazing how fast time flies when you are busy.  I have been spending a lot of time lately working on composite applications and will be posting a number of entries around this topic. One...

Introduction In the first article of the series we discussed how to exchange messages with an orchestration via a two-way WCF Receive Location using the Duplex Message Exchange Pattern . This form of bi-directional communication is characterized by the ability of both the service and the client to send...

This blog entry is a sequel to the October 30th Blog “ Securing WCF Services hosted in Windows Server AppFabric with Windows Identity Foundation (WIF) ” where we demonstrated how to use WIF to secure Services hosted in AppFabric. And in this blog post we extend the same scenario to demonstrate...

A couple of weeks ago I was working with a customer who engaged me to assist with a "little" problem they had – under certain conditions, the system would lose messages coming from a MSMQ queue and designed to correlate to instances of a long-running WF service hosted in IIS/AppFabric...

There are different ways of modifying a workflow during run time. Let us discuss some of the ways. read more

The following table details the procedure for hosting a sequential workflow read more

The workflow life cycle has a number of logical execution states in which a workflow can exist. There is a single Initialization state, called Created, in which the workflow instance exists before execution starts. read more

WF provides various workflow-authoring styles, such as sequential and state machine, to develop your workflows Sequential read more

In the blog posts 1 & 2 , we went over how a Workflow application can pass credentials to the LOB activities. While the mechanisms suggested work when the credentials originate from the application in question, a different approach is required when the credentials originate somewhere else. Consider...

A key challenge while designing and deploying Web Services is access control and this blog post is the first in a two part series focused on leveraging Windows Identity Foundation (WIF) to secure Services hosted in Windows Server AppFabric. In this first blog post we focus on securing both WCF and Workflow...

WF enables you to separate workflow definition from business logic. You can develop your entire workflow by using code, where you specify the workflow structure and logic in the Microsoft Visual C# development tool or the Microsoft Visual Basic development system. The typical workflow-authoring scenario...

A WF workflow enables you to model a real-world process using a procedural approach. You begin by identifying the key steps in the process and any human interaction in those steps. You can then model your workflow based on those steps and include functionality for the human interaction required. read...

WF includes visual designers for use in Visual Studio 2008, which enable you to quickly design and develop workflow applications. By using workflow classes and custom data types, you can also define your workflow structure programmatically and develop the entire solution in code. The following table...

All sessions from the European BizTalk Conference will be available on MSDN shortly. For more information: http://appliedarchitecturepatterns.com/

This post is a follow-up to the RTM last week of BizTalk Server 2010 . The BizTalk User Experience team has been REALLY busy putting together a ton of great resources. These are all live now, enjoy!   Learning: BizTalk Server 2010 Training Kit Video tutorials Working with BizTalk AppFabric Connect...

There is tremendous interest in versioning .NET4 Workflows. This blog post provides guidance on common scenarios that can be supported. Background Workflow versioning is required by a change in a business process that causes a modifications in the implementation of a .NET4 Workflow Service and this may...

It’s been a while since I’ve said anything here about Windows Server AppFabric, so I thought I’d do a quick post about some great resources about the technology. I highly recommend both of these. White paper: If you’re new to AppFabric, or want a better understanding of how the whole thing works at an...

Windows Server AppFabric Monitoring works with Oracle (10g XE) database? Yes, indeed! AppFabric Monitoring Provider extensibility is proven out in this MSDN Code Gallery Release - http://code.msdn.microsoft.com/AFMonitoringOracleDB The release includes the Visual Studio 2010 solution that contains all...

This post is for everyone reading my blog but not Yossi’s blog, Richard’s blog, Dan’s blog, or Steef-Jan’s blog. (I know, very small chance ). The AppFabric Customer Advisory Team (CAT) (formerly known as BizTalk Rangers) opened a new blog. Their focus is not just on BizTalk Server but now also on Windows...

If you are in Minneapolis on Thursday September 16th please join us for the Twin Cities Connected Systems User Group Meeting. The meeting takes place at 6:00 p.m. at the Microsoft offices at 8300 Norman Center Drive, Bloomington, MN 55437. Eric Kraus and I will be speaking on: Composite Applications...

Microsoft’s Windows Server AppFabric Customer Advisory Team ( CAT) has launched a new blog focused on AppFabric (both Windows Server AppFabric and Azure AppFabric), WCF, WF, BizTalk, data modeling and StreamInsight. You can find the blog at http://blogs.msdn.com/b/appfabriccat/ . If you read my blog...

Just a quick one. If you set breakpoints in a windows workflow but during debug it skips right past them it might mean things have not have been reflected on the underlying XAML file. So make a small change to the workflow surface, save it, build the project and try again. I found the answer [...]

Are you using WF/WCF in .NET 4? Would you like to help us improve WF/WCF in the next release? Would you mind spending an hour or two in a conference call talking about what you like, don't like and need help with? We are looking for customers who would be willing to share their stories with us. If...

I am sure you are excited about Windows Workflow foundation. Who is not? except those poor Java guys... Here is a collection of Videos available on Windows Workflow Foundation 4. I hope you find it useful. The list will keep growing, so feel free to bookmark this page for later reference. read more

In this episode, Dave Cliffe, Program Manager for Workflow Services, describes the architecture of the Workflow Services infrastructure. For more information, see the Workflow Foundation developer center on MSDN .