private void ChangeState(ListenerState newState)
{
// Check that only allowed state changes are made
switch (State)
{
case ListenerState.uninitialized:
if (!(newState == ListenerState.initializing || newState == ListenerState.faulted))
{
throw new Exception("Invalid state change. Uninitialized->" + newState.ToString());
}
break;
case ListenerState.initializing:
if (!(newState == ListenerState.initialized || newState == ListenerState.faulted))
{
throw new Exception("Invalid state change. Initializing->" + newState.ToString());
}
break;
case ListenerState.initialized:
if (!(newState == ListenerState.starting || newState == ListenerState.faulted))
{
throw new Exception("Invalid state change. Initialized->" + newState.ToString());
}
break;
case ListenerState.starting:
if (!(newState == ListenerState.started || newState == ListenerState.stopping || newState == ListenerState.faulted))
{
throw new Exception("Invalid state change. Starting->" + newState.ToString());
}
break;
case ListenerState.started:
if (!(newState == ListenerState.stopping || newState == ListenerState.faulted || newState == ListenerState.starting))
{
throw new Exception("Invalid state change. Started->" + newState.ToString());
}
break;
case ListenerState.stopping:
if (!(newState == ListenerState.stopped || newState == ListenerState.faulted))
{
throw new Exception("Invalid state change. Stopping->" + newState.ToString());
}
break;
case ListenerState.stopped:
if (!(newState == ListenerState.faulted))
{
throw new Exception("Invalid state change. Stopped->" + newState.ToString());
}
break;
default:
throw new Exception("Invalid state change");
}
// Raise event
switch (newState)
{
case ListenerState.initializing:
if (OnInitializing != null)
{
OnInitializing.Invoke();
}
break;
case ListenerState.initialized:
if (OnInitialized != null)
{
OnInitialized.Invoke();
}
break;
case ListenerState.starting:
if (OnStarting != null)
{
OnStarting.Invoke();
}
break;
case ListenerState.started:
if (OnStarted != null)
{
OnStarted.Invoke();
}
break;
case ListenerState.stopping:
if (OnStopping != null)
{
OnStopping.Invoke();
}
break;
case ListenerState.stopped:
if (OnStopped != null)
{
OnStopped.Invoke();
}
break;
case ListenerState.faulted:
if (OnFaulted != null)
{
OnFaulted.Invoke();
}
break;
}
State = newState;
}
//Hook to be called at the end of Licenses.Init
internal static void Init()
{
OnInitializing?.Invoke();
}