Fix and improve EngineRunning state #3911
Merged
+47
−30
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Because the engine state updates are side effects, it can happen that the last "NOT_RUNNING" happens after the overall
CompletableFuture<ExecutionResult>
is completed.As this is very counterintuitive this PR fixes that edge case with observing the
CompletableFuture<ExecutionResult>
explicitly.It also make explicit states for Start and finish the engine.