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The past two days I have been working on a performance problem we were having with a workflow implementation. The workflow was quite simple, A WCF call coming in, then registering the request data in a SQL database and return a ticket that the request was received. The ticket can be used by people to get information later on the status of their ...

Today I had to upgrade several machines from the Beta or RC version of VSTS to the RTM version.You must manually uninstall all artifacts installed during the Beta period and that can be a daunting task. Therefore I created a script you can run to uninstall all of the stuff in one sweep. Just copy the following lines, place them in a command file ...

Today I ran into another bug related to SQL tracking. We have a workflow that changes it's implementation based on settings from the database. So what we do is use the WorkflowChanges object and modify the activity tree and apply the changes. Nothing fancy, just simple workflow stuff fully documented.We use the WorkflowMonitor to provide our ...

Today I gave a session at SDC about Practical windows workflow foundation and a session on advanced activity development where I explained the way I build te WCF activities I published at codeplex. I promised to put up my slides and code samples on my blog, so here they are:slides for the Practical Workflow Foundation Session: heredemos:01- ...

Today I finished some additional work I did on the WCF activities at codeplex.I added some nice features (if I may say so myself :-)) that implement automatic workflow correlation based on custom attributes applied on the operation or data contract.If you are not familiar with the activities, take a look at codeplex and see how you can very easily ...

The past few weeks have been pretty busy for me. Not only was I working with some colleagues on a Robot challenge (where we finished third J, see here a movie with Woody in action  , and the post of my coleague Erik) , I also had to prepare for 3 sessions for the DevDays here in the Netherlands.At my session on "Practical Team ...

Finally I made it to free up some time and create a released version of the WCF Activities I have been working on for some time now. This version is fully tested and already used in multiple projects I am working on including the very demanding ones that run thousands of workflows a day!First of all I want to thank Martijn Beenes who has been ...

Last week we ran in to a nasty problem with windows workflow foundation in our project. We ran one of our load tests for more than a few hours. We noticed that after a few hours all workflows ended up as being aborted for no apparent reason.Digging further into the problem we decided that we would add some more exception handling into the fault ...

The past few weeks I have been updating the WCF activities I published on Codeplex frequently. But the codeplex server my project is hosted on has been out since April 11th! Today I was able to connect to the server again, but the history of the project is not recovered from the crash. They switched me to a new TFS server and there I checked ...

The past few days I have been working on Load and stress testing some workflow implementations that work with the WCF input activities I created (I published them at Codeplex for you to use as well http://www.codeplex.com/WCFWorkflow )This project has some very interesting non-functional requirements where we need to process more than 300.000 ...