Ron Jacobs

Windows Workflow Foundation

Posts
  • Ron Jacobs

    WF4 Spike: Activity Versioning, GAC and Loose XAML

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    In agile software development , a spike is a story that cannot be estimated until a development team runs a timebox ed investigation. The output of a spike story is an estimate for the original story. - SearchSoftwareQuality.com Definitions Update 1/8...
  • Ron Jacobs

    Workflow on Windows Azure Research

    • 2 Comments
    Our team is busily working on some great new stuff to bring first class support for Workflow to Windows Azure.  We want to hear from you so we can be sure to deliver on what you need. Drop me a line if you want to chat and you Have workflow (WF3...
  • Ron Jacobs

    endpoint.tv - A Better State Machine Driven WPF UI

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    I couldn't leave this one alone. While I was making the last episode I said that there was possibly another strategy for detecting states and transitions and that was to use Tracking data. In this episode I'll show you a better way to implement our WPF...
  • Ron Jacobs

    New Release Microsoft.Activities.UnitTesting 1.71

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    Just posted a new release of Microsoft.Activities.UnitTesting This release incorporates the Task Parallel Library to greatly simplify test code. Episodes You can now create a task that will run an episode of work in the workflow. An episode is...
  • Ron Jacobs

    Book Review: Windows Workflow Foundation 4 Cookbook

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    Andrew Zhu works for Microsoft in Shanghai and has been using WF4 since the very early days.  He frequently answers questions on our internal mailing list and on the WF Forums so when I heard that he was writing a book about WF4 I knew it would be...
  • Ron Jacobs

    WCF and AppFabric Auto-Start

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    Auto-start is a really cool feature of Windows Server AppFabric. Recently I was asked about how you can do some kind of process initialization in your code with Auto-start (which the documentation implies that you can do). This led to a discussion with...
  • Ron Jacobs

    How to consume a WCF Service from a WF4 Workflow

    • 3 Comments
    Recently I saw a message on the WF4 Forum where someone was asking for help learning how to consume a WCF service from a Workflow. In this post I’m going to walk through how you can consume a WCF service from a Workflow where both the service...
  • Ron Jacobs

    New WF4 Caching Activities for Windows Server AppFabric

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    I’m happy to announce that we have just posted a “Labs” release on our http://wf.codeplex.com site with some new Caching Activities . These activities work with Windows Server AppFabric Caching making it possible for you to use the cache...
  • Ron Jacobs

    TechEd Europe 2010 Sessions Now Available

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    I had a great time in Berlin speaking at TechEd Europe.   The recordings are now available if you want to watch. Using Workflow and Windows Server AppFabric in your Applications You have heard about Windows Server AppFabric but do you know what...
  • Ron Jacobs

    WCF How To–Configuration Based Activation

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    I was there when this feature was born.  It’s a long story but basically the idea is that you should be able to have a WCF service (or Workflow Service for that matter) without a SVC file. What is an SVC file? Simply put, an SVC file is configuration...
  • Ron Jacobs

    WCF WebHttp Service returns HTTP 415 “Unsupported Media Type”

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    When I was developing my demos for PDC10 I ran into a problem.  I was using some new HTTP activities for the next release of WF and invoking a simple console application with an HTTP POST.  For some strange reason I ran into the following error...
  • Ron Jacobs

    Interesting Twist on Auto starting a Workflow with IIS / AppFabric

    • 3 Comments
    Pablo Castilla contacted me about his take on auto starting a workflow with IIS and AppFabric. WF 4.0: How to automatically start a workflow by itself hosted in AppFabric It looks interesting.  I read the code but I have not tried it myself. ...
  • Ron Jacobs

    Want to Learn Windows Workflow 4 (WF4)?

    • 2 Comments
    Here are some great resources to get you started. Intro the WF4 Hands On Lab Intro to Workflow Services / AppFabric Hands On Lab (Part of the Visual Studio 2010 Training Kit ) Introduction to State Machine Hands On Lab AppFabric.tv / endpoint...
  • Ron Jacobs

    Goodbye Evangelist, Hello Program Manager

    • 7 Comments
    For the last 5 years I've been a Technical Evangelist in the Developer & Platform Evangelism Group (DPE) at Microsoft.  Today is my last day as a Technical Evangelist.  Starting on Monday I’m going to be a Program Manager in the AppFabric...
  • Ron Jacobs

    endpoint.tv - AppFabric Caching vs. IBM eXtreme Scale benchmark

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    Greg Leake has been at it again.  He has emerged from his lab with the latest results of benchmark testing of Windows Server AppFabric Caching vs. IBM eXtreme Scale and the results are something you definitely want to see. Microsoft ® Windows ® Server...
  • Ron Jacobs

    endpoint.tv - WF4 Activities, Callbacks and Event Handlers

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    Suppose you want to create a workflow that needs to wait on a CLR event or callback. In this episode I'll show you how to create an Activity and a Workflow Extension that implements IWorkflowInstanceExtension to create an activity that can safely deal...
  • Ron Jacobs

    Cool things are happening down under

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    Two of my favorite places to visit are Australia and New Zealand.  Recently I heard from some guys down there doing great work with WF4. Rory Primrose has been working on developing some solutions for WF4 and sharing them with you on Codeplex. ...
  • Ron Jacobs

    WF4 Activities and Callbacks / Event Handlers

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    Recently David K contacted me through my blog and shared with me a solution that he came up with for a particular problem that he was able to solve using IWorkflowInstanceExtension and said it would be great if I could do an endpoint.tv episode about...
  • Ron Jacobs

    How To Unit Test Workflows–Mocking Activities

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    Suppose you want to unit test a workflow that has some external dependency like a database, web service, file or some other thing that makes testing inconvenient. The need to eliminate external dependencies when testing has led to a world of mocking frameworks...
  • Ron Jacobs

    How to Unit Test a WorkflowService

    • 2 Comments
    Testing WorkflowServices is harder because you have to host the service somehow. There are several options you can use. You can host the service in IIS/AppFabric by configuring your project to use IIS You can try to insure that the local ASP...
  • Ron Jacobs

    Unit Testing Workflows–Testing Activities with Bookmarks

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    In my previous post I showed you how to test simple activities using WorkflowInvoker. While this is a great way to test simple activities it does have limitations. The MSDN documentation states WorkflowInvoker does not allow instance control such...
  • Ron Jacobs

    How to Unit Test WF4 Workflows

    • 5 Comments
    Recently I asked you to vote on topics you want to see on endpoint.tv . Coming in at #3 was this question on how to Unit Test WF4 Workflows. Because Workflows range from very simple activities to long and complex multi-step processes this can be a...
  • Ron Jacobs

    How to make the WF4 Batch Worker Autostart

    • 2 Comments
    Today on endpoint.tv I showed how to create a workflow service that can do background work on a scheduled basis (The sample code is posted here ). In the example I showed a web UI that allows you to start the job by clicking on a submit button. Somebody...
  • Ron Jacobs

    The Problem of Versioning

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    The voting on our site What do you want to see on endpoint.tv is moving along nicely.  Yes we are going to do something about OAuth with the HttpClient but today I want to think about the #2 issue which is versioning with workflows.  This post...
  • Ron Jacobs

    What do you want to see on endpoint.tv?

    • 6 Comments
    This morning I awoke to a bright sunny day and thought to myself… What shall I do today? Unlike most people I have a great deal of freedom to be as creative as possible at helping people to build great applications with .NET using WCF, WF4 and...
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