7 Articles match "Instance","Workflow"

31 Articles match "Instance","Workflow"

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• Windows Workflow Foundation 4 and persistence
  
  The persistence class out of the box is called SqlWorkflowInstanceStore and as the name suggests it saves workflow data in either SQL Server 2005 or 2008. We can attach it to either a WorkflowApplication or a WorkflowServiceHost and persist workflows when we want. This can be used to run only short lived workflows and doesn’t support persistence. var instanceStore = new SqlWorkflowInstanceStore(connStr); WorkflowApplication app = new WorkflowApplication(workflow); app.InstanceStore = instanceStore; app.Run(); Okay its a little more involved then that. Enjoy!
  The Problem Solver - Thursday, November 19, 2009
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• 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 whenever you want. However as soon as we get into long running workflows and the SQL Workflow Instance Store things get quite a bit more complicated. It uses this data to differentiate between different workflow service definition. Enjoy!
  The Problem Solver - Thursday, November 4, 2010
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• Securing a Workflow Service using Windows Identity Foundation
  
  How about securing a workflow service? As a workflow 4 service is just another WCF service securing it is just as easy as the steps below will demonstrate. To start with I created a small workflow service and a simple client application. Instead of hosting this myself I am going to use a publicly available instance hosted here. Tags: NET Workflow WCF WF4 VS2010 WIF The way security is often still handled these days with each application keeping track of their own users is somewhat dated. No security yet and the client works as expected. try. {. try. {. Enjoy!
  The Problem Solver - Friday, September 24, 2010
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• Updating workflow instances using an update map
  
  One of the really important new features in Windows Workflow Foundation 4.5 is the capability to version workflows and workflow instances. You get to choose what you want to do, either keep running existing instances with their original workflow definition or upgrade them to the latest workflow definition. What should you do, upgrade exiting instances or run multiple definitions side by side? If you find a bug in your workflow definition the update scenario is probably what you are looking for. 5: Version = new Version(1, 0). 10: {.
  The Problem Solver - Wednesday, October 10, 2012
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• Using WF4 bookmarks with IWorkflowInstanceExtension
  
  Beta 2 In this previous blog post I showed how to create an asynchronous activity using the NativeActivity and CreateBookmark to pause a workflow execution. Using a IWorkflowInstanceExtension Workflow extensions can be of any type you want, there is no base class or interface requirement. But that also means they are not aware of the workflow runtime environment and can’t do much more that respond to calls from a workflow. One of those, the SetInstance, is passed a wrapper object around the running workflow allowing us do do some more work. return null ; }.
  The Problem Solver - Wednesday, January 27, 2010
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• 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. The workflow service with 2 different versions of same workflow. The second version of the workflow has more activities in the tree so it can’t load workflow instances from version 1. Each workflow is hosted in a different XAMLX file and the second was created by copying the first and making the required changes to it. It knows about one existing workflow instance previously created and will create a new one. Enjoy!
  The Problem Solver - Tuesday, November 16, 2010
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• WF4&WCF and message correlation
  
  This same some more about sending multiple messages to the same workflow, AKA Workflow Correlation. One of the ugly parts of Windows Workflow Foundation 3 was the message correlation part when you used WCF to send multiple messages to the same workflow. This guid was the workflow instance ID but having to use that on the client means the client had to be very aware of the server technology used, something that goes against the principals of WCF. The new workflow definition looks like this: private static WorkflowElement CreateWorkflow(). {.
  The Problem Solver - Wednesday, September 2, 2009
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