Make parent InstanceId on suborchestrators

[andreujuanc]

As per discussed here #153 , looks like it'd help to move forward on some issues if we could get the parent instanceId on suborchestrators.

Right now it can be passed by manually (parameters), but it does not makes sense, and it's not so intuitive. Specially when having the name "SUB"orchestrator, which means that the Parent orchestrator should send relevant info to its children, otherwise it would not be "sub".

Wish I could give ideas on how it'd be implemented, but I'm not yet familiarized with the source.

Cheers

[cgillum]

I think it should relatively straight-forward to flow this information.

Specifically, in DurableTaskExtension.OrchestrationMiddleware we can get access to the orchestration runtime state, which contains the parent's instance ID. We can then attach that to the DurableOrchestrationContext so that sub-orchestrations can reference it.

[gled4er]

Hello @cgillum ,

I can work on this issue. Let me know if this is ok.

Thank you!

[cgillum]

Sure! I think you should be able to get the OrchestrationRuntimeState from the middleware context. I was looking through the DurableTask.Core code and I believe that it should have parent orchestration information, including the ID.

[gled4er]

Hello @cgillum,

Thank you for the additional information!

[cgillum]

This has been merged and I'll include it in today's release. Thanks @gled4er for jumping on this so quickly!