Workflow in SharePoint 2013 has undergone quite the architectural change from its SharePoint 2010 ancestor. I documented many of the major changes in a previous blog post, “What Changed in SharePoint 2013 Workflow? Pretty Much Everything.” While SharePoint 2013 is backwards-compatible with SharePoint 2010 workflows, you may decide that the benefits of the new design are needed. The purpose of this post is to illustrate the new considerations you’ll need to keep in mind when targeting SharePoint 2013 workflows. The SharePoint 2010 project we’ll use for this example is the one from my very first AIS blog post, “Developing Multi-Tiered Solutions for SharePoint.”
In our example project there are actually two workflows, SectionDocumentApprovalState (SDAS) and MasterDocumentApproval (MDA). The MDA checks if the various SDAS-related sections have been merged and finalized, then notifies specific users for approval of the final document. An instance of SDAS is created for each section, created from the Master Document that monitors the editing and approval of the specific section. We’ll focus on just the SDAS workflow. In the previous post, I referred to the workflows as being part of the Presentation Layer and the custom code called into the Business Layer. Both of these layers will change in a SharePoint 2013 workflow solution.