/// <summary>
/// Handles Machinations tasks.
/// </summary>
public void ProcessSchedule()
{
try
{
//Execute any updates from the back-end.
while (_updatesFromBackEnd.Count > 0)
{
MnDataLayer.UpdateSourcesWithValuesFromMachinations(_updatesFromBackEnd[0].Key, _updatesFromBackEnd[0].Value);
_updatesFromBackEnd.RemoveAt(0);
}
//Rudimentary State Machine:
//Socket not yet ready?
if (!_socketClient.IsInitialized)
{
L.D("Machinations Service SocketIO Scheduler: Waiting for Socket Connection. Current State: " + _currentState);
if (_currentState != State.WaitingForSocketReady)
{
L.E("Invalid state given the fact that the socket is not even initialized.");
FreshStart();
}
return;
}
//If the socket isn't yet ready, starting the Auth process.
if (_currentState == State.WaitingForSocketReady)
{
L.D("Machinations Service SocketIO Scheduler: WaitingForSocketReady -> AuthRequested.");
_currentState = State.AuthRequested;
_socketClient.EmitAuthRequest();
return;
}
//Wait for Auth.
if (_currentState == State.AuthRequested)
{
L.D("Machinations Service SocketIO Scheduler: Waiting for Auth Response.");
return;
}
//Wait for Init.
if (_currentState == State.InitRequested)
{
L.D("Machinations Service SocketIO Scheduler: Waiting for Sync Init Response.");
return;
}
//When everything is connected, switching through the following states:
switch (_currentState)
{
case State.AuthSuccess:
L.D("Machinations Service SocketIO Scheduler: Auth Success. Idling.");
_currentState = State.Idling;
//Make sure we request init at first start.
if (!HasPerformedFullDiagramInit)
{
_initRequested = true;
}
break;
case State.Idling:
if (_initRequested)
{
L.D("Machinations Service SocketIO Scheduler: Init Requested: Idling -> PreparingForInitRequest.");
_currentState = State.PreparingForInitRequest;
}
break;
//Wait at least 1 Timer interval before making the Sync request.
case State.PreparingForInitRequest:
L.D("Machinations Service SocketIO Scheduler: Init Requested.");
_currentState = State.InitRequested;
_initRequested = false;
//The first time we get here, we will perform a FULL init request.
_socketClient.EmitDiagramInitRequest(HasPerformedFullDiagramInit);
HasPerformedFullDiagramInit = true; //But subsequent times, we will only ask for whatever is new.
break;
case State.InitComplete:
L.D("Machinations Service SocketIO Scheduler: Init Complete. " + _currentState + " -> Idling.");
_currentState = State.Idling;
MnDataLayer.UpdateSourcesWithValuesFromMachinations(_diagramElementsFromBackEnd);
MnDataLayer.SyncComplete();
break;
}
}
catch (Exception ex)
{
L.ToLogFile("MachinationsService Scheduler Exception Caught:");
L.ExToLogFile(ex);
}
}