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Architecture and Modeling
BizTalk
Core.Net
WCF
Workflow 4.0 Persistence
Workflow 4.0 offers a powerful persistence features, which are at this moment not in detail documented. For this reason I build a short sample, which demonstrate persistence of the workflow driven by workflow host. The workflow example shown in...
Published
Sun, Jun 06 2009 12:24 AM
by
Damir Dobric
Filed under:
Workflow
WF4.0: How to use specific DataContract?
Using of specific custom contracts in WF4.0 BETA1 seem to be for many of us a feature which is not very intuitive. Personally, I would always like to use well known good approach “Contract First”. Workflow Foundation approach silently seems to be...
Published
Sat, Jun 06 2009 10:57 PM
by
Damir Dobric
Filed under:
Workflow
.NET40: Workflow-, Activity- and Instance-States of Workflow Service
This post shortly describes all different states of one workflow, activity and instance of .NET 40 Workflow Service. In general these states are produced as tracking records of so called WF and WCF tracking subsystems. States of Workflow Foundation Tracking...
Published
Sun, Apr 04 2009 6:23 PM
by
Damir Dobric
Filed under:
WCF
,
Workflow
Declarative Workflow Services 4.0: Error - A Location cannot be generated..
Problem Description When working with declarative workflow services 4.0 you may get this message in the workflow service which receive an asynchronous the message. System.WorkflowModel 4.0.10924.1: Throwing exception: System.InvalidOperationException...
Published
Fri, Apr 04 2009 1:00 PM
by
Damir Dobric
Filed under:
WCF
,
Workflow
Declarative Workflow Services 4.0: Error - InstanceKeyNotFoundException
Problem Description When working with declarative workflow services, you may get following error: System.ServiceModel.Core: Throwing exception: System.ServiceModel.Persistence.InstanceKeyNotFoundException: The requested operation could not complete because...
Published
Fri, Apr 04 2009 12:56 PM
by
Damir Dobric
Filed under:
Workflow
Declarative Workflow Services 4.0: error XC1008
Problem Description When working with declarative workflow services you may get following error on build: error XC1008: The XAML MSBuild task only processes files that either contain an '{ http://schemas.microsoft.com/winfx/2006/xaml}Directive.Class'...
Published
Fri, Apr 04 2009 12:48 PM
by
Damir Dobric
Filed under:
Workflow
Declarative Workflow Services 4.0: Error - A binding instance has already been associated ..
Problem Description When trying to start declarative workflow service within Console Application of similar you may get following error: A binding instance has already been associated to listen URI ' http://localhost:88/TestService.xamlx' . If...
Published
Fri, Apr 04 2009 11:52 AM
by
Damir Dobric
Filed under:
Workflow
What is new in .NET 4.0?
The new version of .NET framework 4.0 should provide set of new features to target market demands of the near future. Some of these demands have been described in the "Magic Quadrant" post . And here is the list of features which targets connecting...
Published
Sun, Oct 10 2008 10:52 PM
by
Damir Dobric
Filed under:
BizTalk
,
Architecture and Modeling
,
WCF
,
Workflow
The Magic Quadrant
An Application Enterprise Server is a server, system, or better the middle-ware which acts as a container for applications' business logic. Windows Server seems to be with .NET Framework and Visual Studio the most comprehensive framework and developer...
Published
Sun, Oct 10 2008 7:22 PM
by
Damir Dobric
Filed under:
BizTalk
,
Architecture and Modeling
,
WCF
,
Workflow
Workflow Service Host error
When self-hosting the workflow service, for example in one console application, you may get following error: "Service behavior WorkflowServiceBehavior requires that the binding associated with endpoint BasicHttpBinding_IMyContract listening on http...
Published
Sun, Aug 08 2008 12:42 PM
by
Damir Dobric
Filed under:
WCF
,
Workflow
About manually scheduling and persistence of workflow
When the manually schedule service us used to schedule workflows you have to be aware of: 1. The workflows is started by following statement: manualScheduler.RunWorkflow(wfInstID); 2. When this statement is executed the workflow is running on the thread...
Published
Thu, Jun 06 2008 6:35 PM
by
Damir Dobric
Filed under:
Workflow
Advanced Workflow scenarios with Workflow Queuing
If you want to implement an EventHandling scenario, which is more powerfull than out of the box WF-activities this post may helpfull. You may asking yourself, what kind of advanced scenario this could be? Here are some examples: 1. You want to handle...
Published
Tue, Jun 06 2008 5:35 PM
by
Damir Dobric
Filed under:
Workflow
,
WF
Exception while obtaining of ContextManager
During implementation of "correlation" (using of context manager etc.) in Workflow Service based on *HttpContextBindig , you may get following error while obtaining the context manager instance: " Cannot obtain fields or call methods on...
Published
Sat, Mar 03 2008 3:06 PM
by
Damir Dobric
Filed under:
Workflow
,
WF
Behind Workflow *ContextBinding protocol
WF Services introduce few new bindings which slightly change the communication protocol between client and service. This post contains one full message exchange example of the statemachine-workflow which provide two operations: GetData and OnNewMessage...
Published
Fri, Mar 03 2008 10:10 PM
by
Damir Dobric
Filed under:
Workflow
,
WF
PersistOnClose: Enforce Workflow (WF) persistence
Sometimes you may expect that some parts of the workflow takes long time for execution. This is in workflow context mostly common requirement. Unfortunately longer execution statistically increases the error probability in the workflow itself. To solve...
Published
Wed, Mar 03 2008 4:42 PM
by
Damir Dobric
Filed under:
Workflow
,
WF
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