/// <summary>
/// Starts monitoring table's content changes.
/// </summary>
/// <param name="timeOut">The WAITFOR timeout in seconds.</param>
/// <param name="watchDogTimeOut">The WATCHDOG timeout in seconds.</param>
/// <returns></returns>
public override void Start(int timeOut = 120, int watchDogTimeOut = 180)
{
if (timeOut < 60)
{
throw new ArgumentException("timeOut must be greater or equal to 60 seconds");
}
if (watchDogTimeOut < 60 || watchDogTimeOut < (timeOut + 60))
{
throw new WatchDogTimeOutException("watchDogTimeOut must be at least 60 seconds bigger then timeOut");
}
if (_task != null)
{
return;
}
if (OnChanged == null)
{
throw new NoSubscriberException();
}
var onChangedSubscribedList = OnChanged?.GetInvocationList();
var onErrorSubscribedList = OnError?.GetInvocationList();
var onStatusChangedSubscribedList = OnStatusChanged?.GetInvocationList();
NotifyListenersAboutStatus(onStatusChangedSubscribedList, TableDependencyStatus.Starting);
_disposed = false;
CreateOrReuseConversation(timeOut, watchDogTimeOut);
_cancellationTokenSource = new CancellationTokenSource();
_task = Task.Factory.StartNew(() =>
WaitForNotifications(
_cancellationTokenSource.Token,
onChangedSubscribedList,
onErrorSubscribedList,
onStatusChangedSubscribedList,
timeOut,
watchDogTimeOut),
_cancellationTokenSource.Token);
WriteTraceMessage(TraceLevel.Info, "Waiting for receiving " + _tableName + "'s records change notifications.", (Exception)null);
}
