Hi, In Cinder we had merged a complicated piece of code[1] to be able to return something from flow that was reverted. Basically outside we needed an information if volume was rescheduled or not. Right now this is done by injecting information needed into exception thrown from the flow. Another idea was to use notifications mechanism of TaskFlow. Both ways are rather workarounds than real solutions.
I wonder if TaskFlow couldn't provide a mechanism to mark stored element to not be removed when revert occurs. Or maybe another way of returning something from reverted flow? Any thoughts/ideas? [1] https://review.openstack.org/#/c/154920/
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