34 lines
1.5 KiB
Markdown
34 lines
1.5 KiB
Markdown
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# Data Model: State Machine Activity
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## StateMachine
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- `States`: Ordered collection of state definitions.
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- `Transitions`: Ordered collection of directed transition definitions.
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- `InitialState`: Name of the first state.
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- `CurrentState`: Name of the active state, updated as transitions complete. A current state with no valid outbound transitions is terminal.
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## State
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- `Name`: Unique state name by convention; duplicate names resolve to the first declaration.
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- `Entry`: Optional activity scheduled when entering the state.
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- `Exit`: Optional activity scheduled when leaving the state.
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## Transition
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- `Name`: Optional machine-readable transition name.
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- `DisplayName`: Optional human-readable transition name.
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- `From`: Source state name.
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- `To`: Target state name.
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- `Trigger`: Optional activity that waits for the transition event or condition source. If its condition evaluates false, the trigger remains active for a future attempt.
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- `Condition`: Optional boolean expression input. Missing condition means true; false means the source state remains current and the same transition trigger is re-armed.
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- `Action`: Optional activity scheduled after the trigger wins and before source exit.
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## State Transitions
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```text
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EnterState -> Entry -> OutboundTriggers
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EnterState -> Entry -> NoValidOutboundTransitions -> CompleteStateMachine
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OutboundTrigger -> ConditionFalse -> ReArmFailedTrigger + OutboundTriggersRemainPending
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OutboundTrigger -> ConditionTrue -> CancelCompetingTriggers -> Action -> SourceExit -> TargetEntry -> OutboundTriggers
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```
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