how to migrate windows service to appfabric?

I have an existing windows service that connects to the database and do updates periodically.

In what project type I have to convert my logic so that it can be deployed to app fabric?
What will be good strategies to call an sp using multiple threads parallel in appfabric?

Thanks in advance

Solution

I was having a windows service and having couple of things like calculating statistics from data for view (reduce complex operations at query time ), image processing and email system.

I got a very good solution video which is describing how to do that using Workflow services as a Batch Job by Rob Jacobs