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A simple Finite State Machine example - implementation

$when:: fsm1.init (id)
   . (dieselScope[="status"]="init")

$when:: fsm1.move
   . (dieselScope[="status"]=((status + "-") + to))

$when:: fsm1.reset
   . (dieselScope[="status"]="")

This works because the context is maintained for the duration of the story. This FSM would not maintain the state across stories, for instance... see below.

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//$when fsm1.*(id) => ctx.persisted(kind="fsm1", id=id)

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