[Question] How to notify to sub-statemachine that some properties of host statemachine has been changed

[xiaozhikang0916]

I have a sub statemachine with long-running non-restartable job, and dependends on some properties of the host state. How should I tell the sub statemachine that such properties has been changed during the transitions of host statemachine, without relaunching the sub statemachine?

There may be 2 ways I can find at this time:

1. Wrap sub statemachine in an 'untilIdentityChange' block, and save the non-restartable job in a singleton service.
2. Use 'untilIdentityChange' block to send an action to host statemachine and then map it to the sub, but it may be an unrecommanded practice to send actions to self.

[gabrielittner]

I would suggest having the long running action in a separate place if you want to just update values that change in the state instead of cancelling the long running action when the identity changes. We usually then expose a Flow from the long running action to get progress updates and let the state machine collect it.