Directly call Activities and Sub-orchestrations of Azure Durable Functions

Question

Is there any way to directly call activity of a durable function other than through another specialized durable function?

For example, I have a durable function D, calling activities A1, A2 and sub-orchestration S.

In other scenarios I don't need whole logic of D and I'd rather directly call A1 or S. Ideally I'd like those to have separate queues of tasks they need to process (AFAIK, durable functions actually work this way, so in fact A1 and S do have queues of tasks). D can use that queue, and I also want to manually push messages there whenever I need from other pieces of code (not durable functions).

The only solution I see for now is wrapping each activity I need into separate primitive durable functions DA1, DS, which would just forward the call to corresponding activity. But that's obviously an overhead and reduces system reliability. Is there a better way of calling A1 or S directly?

Answer 1

This is not supported at the moment. But there is an open issue tracking this feature. Kindly see https://github.com/Azure/azure-functions-durable-extension/issues/160