Sharing variables between WorkFlow Application / SIngelton Workflow

Question

i am running a c# application that is launching workflow activities for some purposes (using invokeworkflowapplication). I would like to be able to share a static class between all flows i am launching from my application (some sort of singelton class that they can all acccess at any time).

Is there such a method to make the flow i am launching run in some singelton context??

Thanks!

Answer 1

A nice way to share data between different workflows and instances is to make a workflowInstanceExtension. This extension must be added by your application and its same instance be used to all your WorkflowApplications, invoker or service, so it will be a "singleton".

Example:

MyDataSharingExtension dse = new MyDataSharingExtension();

WorkflowApplication wfApp1 = new WorkflowApplication();
wfApp1.Extensions.Add(dse);

WorkflowApplication wfApp2 = new WorkflowApplication();
wfApp2.Extensions.Add(dse);

Then, inside an activity, you can call

context.GetExtension<MyDataSharingExtension>().GetData();

If you need the data at workflow level(not code), you could make a custom activity to retrieve the data to a variable.

If it don't fit your needs, take a look at this implementation of enterprise variables