Question

Let’s say I have 2 states, an Active state and an Idle state. If I receive some events in Active state I would like to defer them and execute them when I go back to Idle state.

But when I go back to Idle State is there a way to chose which previously deferred event to process? or is there a way to prioritize them or even ignore few of them?

Thanks,

Answer 1

I see that the basic capability of deferred events is covered in the documentation provided on the project, which I have found helpful in general. In the section titled Orthogonal regions, terminate state, event deferring look for the text “UML defines event deferring as a state property. To accommodate this, MSM lets you specify this in states by providing a deferred_events type…” Note that there are two different methods described there for implementing the deferred events.

Without testing an example, I cannot say whether or not the referenced material on Conflicting transitions and guards will allow you to establish the priority you are seeking on deferred events. You could post your problem or a simplified example.