private void OnStateVariableChanged(DvStateVariable variable)
{
lock (_serverData.SyncObj)
{
// Unicast event notifications
DvService service = variable.ParentService;
foreach (EndpointConfiguration config in _serverData.UPnPEndPoints)
{
foreach (EventSubscription subscription in config.EventSubscriptions)
{
if (subscription.Service == service && !subscription.IsDisposed)
{
subscription.StateVariableChanged(variable);
}
}
}
// Multicast event notifications
if (variable.Multicast)
{
EventingState eventingState = _serverData.GetMulticastEventKey(variable.ParentService);
if (eventingState.EventKey == 0)
{
// Avoid sending "normal" change events before the initial event was sent
return;
}
eventingState.ModerateChangeEvent(variable);
ScheduleMulticastEvents();
}
}
}
/// <summary>
/// Called when a state variable has changed its value.
/// </summary>
/// <remarks>
/// This method will check if the variable is evented. If not, nothing happens. If yes, and the variable
/// is moderated in rate or minimum change, it will be scheduled to be evented later, or will
/// be evented at once, depending on the moderation.
/// </remarks>
/// <param name="variable">The variable which changed its value.</param>
public void StateVariableChanged(DvStateVariable variable)
{
if (!variable.SendEvents)
{
return;
}
lock (_serverData.SyncObj)
{
// Only send event if:
// - Subscription is not expired
// - Initial event was already sent
if (DateTime.Now > Expiration)
{
Dispose();
return;
}
if (_eventingState.EventKey == 0)
{
// Avoid sending "normal" change events before the initial event was sent
return;
}
_eventingState.ModerateChangeEvent(variable);
}
// Outside the lock
ScheduleEvents();
}