Recently I was asked to present at the BizTalk Users Group in Sweden. I had a great time and was welcomed nicely by my Swedish friends.
I presented on the new enhancements to the Windows Application Server role code named Dublin.
I presented two 35 minutes sessions covering a lot of the same material talked about at the recent TechEd in Los Angeles, CA.
The two sessions are now online and available for everyone to watch. The first session is essentially the value proposition of using Dublin and Workflow Services and the second session is a deeper dive into custom tracking and monitoring.
The top question I get is when can I get the code for Dublin? Microsoft stated at TechEd they planned for a public beta of Dublin around the PDC 09 timeframe.
Enjoy and please post any comments or questions.
Session 1: Inside the Windows Application Server Enhancements known as Dublin (1/2)
Abstract: In this session we will review the features of the Windows Application Server Enhancements code named Dublin. This session will show how to use new and enhanced concepts in the .Net 4.0 framework to empower Services hosted in Windows allowing users insight into service health and activity.
Session 2: Inside the Windows Application Server Enhancements known as Dublin (2/2)
Abstract: This session takes a deeper dive into Windows Application Server Enhancements by looking in detail at the hosting of a Workflow Service. This will cover reviewing a web service aggregator Workflow Service, setting up custom tracking, monitoring running services, and import and export of applications.
Don’t miss the screen cast video on this same subject available at Content Based Correlation in Workflow 4.0
Content based correlation is used when you send a message out of a long running workflow and need to get a response back later into that same workflow using information contained inside the original message. In this case, the correlation needs to be stored and made available to match the response message.
Content based correlation is easy to set up and use inside Windows Workflow 4.0. At a high level you need to do the following:
- Create a Correlation Handle variable to use for the correction
- Set up this variable and xpath on the Send Activity
- Set up this variable and xpath on the Receive Activity
It is that easy!
Lets take a look at this process step by step.
First, set up a new Variable inside the workflow. In the picture below, the variable is named OrderCorrelation.
Using the Type Picker and the Search box on the top right, search for CorrelationHandle. Select the value under the WorkflowServiceModel as seen below.
Now we use this variable on the Send Activity that needs to set up the correlation. Select the Send Activity and press F4. When the properties window opens, go to section 4 – Send Message Correlation. Here we need to set three values. First, set the variable in the Correlation Handle box and then select the correct endpoint from the drop down as seen below.
The third value to set on the Send Activity is the XPath values to use for the content based correlation. Below, we set up an OrderIdQuery with an XPath of //temp:OrderId. OrderId is the variable name of the value in the output message we want to correlate on.
When it is all done, the Send Message will look like the picture below.
The same process is followed on the Receive Activity. Make sure to use the same Correlation Handle. The end result of the Receive Activity is shown below.
And you are done! It is that easy to set up content based correction inside Workflow 4.0.