private void GoToState(State state)
{
// _logger.Trace("CP: {projection} {stateFrom} => {stateTo}", _name, _state, state);
var wasStopped = _state == State.Stopped || _state == State.Faulted || _state == State.PhaseCompleted;
var wasStopping = _state == State.Stopping || _state == State.FaultedStopping ||
_state == State.CompletingPhase;
var wasStarting = _state == State.LoadStateRequested || _state == State.StateLoaded ||
_state == State.Subscribed;
var wasStarted = _state == State.Subscribed || _state == State.Running || _state == State.Stopping ||
_state == State.FaultedStopping || _state == State.CompletingPhase;
var wasRunning = _state == State.Running;
var stateChanged = _state != state;
_state = state; // set state before transition to allow further state change
switch (state)
{
case State.Stopped:
case State.Faulted:
case State.PhaseCompleted:
if (wasStarted && !wasStopped)
{
_checkpointManager.Stopped();
}
break;
case State.Stopping:
case State.FaultedStopping:
case State.CompletingPhase:
if (wasStarted && !wasStopping)
{
_checkpointManager.Stopping();
}
break;
}
if (_projectionProcessingPhase != null) // null while loading state
{
switch (state)
{
case State.LoadStateRequested:
case State.StateLoaded:
case State.Subscribed:
if (!wasStarting)
{
_projectionProcessingPhase.SetProjectionState(PhaseState.Starting);
}
break;
case State.Running:
if (!wasRunning)
{
_projectionProcessingPhase.SetProjectionState(PhaseState.Running);
}
break;
case State.Faulted:
case State.FaultedStopping:
if (wasRunning)
{
_projectionProcessingPhase.SetProjectionState(PhaseState.Stopped);
}
break;
case State.Stopped:
case State.Stopping:
case State.CompletingPhase:
case State.PhaseCompleted:
if (wasRunning)
{
_projectionProcessingPhase.SetProjectionState(PhaseState.Stopped);
}
break;
default:
_projectionProcessingPhase.SetProjectionState(PhaseState.Unknown);
break;
}
}
switch (state)
{
case State.Initial:
EnterInitial();
break;
case State.StartSlaveProjectionsRequested:
EnterStartSlaveProjectionsRequested();
break;
case State.LoadStateRequested:
EnterLoadStateRequested();
break;
case State.StateLoaded:
EnterStateLoaded();
break;
case State.Subscribed:
EnterSubscribed();
break;
case State.Running:
EnterRunning();
break;
case State.Stopping:
EnterStopping();
break;
case State.Stopped:
EnterStopped();
break;
case State.FaultedStopping:
EnterFaultedStopping();
break;
case State.Faulted:
EnterFaulted();
break;
case State.CompletingPhase:
EnterCompletingPhase();
break;
case State.PhaseCompleted:
EnterPhaseCompleted();
break;
default:
throw new Exception();
}
if (stateChanged)
{
UpdateStatistics();
}
}
private void GoToState(State state)
{
var wasStopped = _state == State.Stopped || _state == State.Faulted;
var wasStopping = _state == State.Stopping || _state == State.FaultedStopping;
var wasStarted = _state == State.StateLoadedSubscribed || _state == State.Paused || _state == State.Resumed ||
_state == State.Running || _state == State.Stopping || _state == State.FaultedStopping;
_state = state; // set state before transition to allow further state change
switch (state)
{
case State.Running:
_processingQueue.SetRunning();
break;
case State.Paused:
_processingQueue.SetPaused();
break;
default:
_processingQueue.SetStopped();
break;
}
switch (state)
{
case State.Stopped:
case State.Faulted:
if (wasStarted && !wasStopped)
{
_checkpointManager.Stopped();
}
break;
case State.Stopping:
case State.FaultedStopping:
if (wasStarted && !wasStopping)
{
_checkpointManager.Stopping();
}
break;
}
switch (state)
{
case State.Initial:
EnterInitial();
break;
case State.LoadStateRequsted:
EnterLoadStateRequested();
break;
case State.StateLoadedSubscribed:
EnterStateLoadedSubscribed();
break;
case State.Running:
EnterRunning();
break;
case State.Paused:
EnterPaused();
break;
case State.Resumed:
EnterResumed();
break;
case State.Stopping:
EnterStopping();
break;
case State.Stopped:
EnterStopped();
break;
case State.FaultedStopping:
EnterFaultedStopping();
break;
case State.Faulted:
EnterFaulted();
break;
default:
throw new Exception();
}
}