public void CancelSender(TheThing myBaseThingForLogging, CancellationToken?masterToken = null, bool triggerCancelOnly = false)
{
StopThingMatcher();
SenderTaskInfo previousTaskInfo = null;
if (pendingHistoryLoops.TryGetValue(cdeMID, out previousTaskInfo))
{
try
{
if (!masterToken.HasValue)
{
masterToken = TheBaseAssets.MasterSwitchCancelationToken;
}
try
{
previousTaskInfo.cancelSource.Cancel();
}
catch { }
if (triggerCancelOnly)
{
return;
}
int count = 0;
const int timePerLoop = 1000;
const int timeout = 1 * 60;
while (!masterToken.Value.IsCancellationRequested &&
previousTaskInfo.task.Status != TaskStatus.Canceled &&
previousTaskInfo.task.Status != TaskStatus.Faulted &&
previousTaskInfo.task.Status != TaskStatus.RanToCompletion &&
count < timeout
)
{
try
{
previousTaskInfo.task.Wait(timePerLoop, masterToken.Value);
}
catch (OperationCanceledException) { }
count++;
if (count >= timeout)
{
TheBaseAssets.MySYSLOG.WriteToLog(95275, TSM.L(eDEBUG_LEVELS.OFF) ? null : new TSM(myBaseThingForLogging.EngineName, "Connect", eMsgLevel.l2_Warning, $"Waiting on cancel previous send loop for {myBaseThingForLogging.FriendlyName} - {cdeMID}: timeout after {count * timePerLoop} ms. Retrying."));
count = 0;
}
}
if (count >= timeout)
{
TheBaseAssets.MySYSLOG.WriteToLog(95275, TSM.L(eDEBUG_LEVELS.OFF) ? null : new TSM(myBaseThingForLogging.EngineName, "Connect", eMsgLevel.l2_Warning, $"Unable to cancel previous send loop for {myBaseThingForLogging.FriendlyName} - {cdeMID}: timeout after {count * timePerLoop} ms"));
}
previousTaskInfo.cancelSource?.Dispose();
pendingHistoryLoops.RemoveNoCare(cdeMID);
}
catch (Exception e)
{
TheBaseAssets.MySYSLOG.WriteToLog(95257, TSM.L(eDEBUG_LEVELS.OFF) ? null : new TSM(myBaseThingForLogging.EngineName, "Connect", eMsgLevel.l6_Debug, String.Format("Exception while cancelling previous send loop for thing {0}: {1}", cdeMID, TheCommonUtils.GetAggregateExceptionMessage(e))));
}
}
}
public bool StartSender(TheThing myBaseThing, TheSenderThing senderClone, Func <object, Task> senderLoop, CancellationToken masterToken)
{
if (pendingHistoryLoops.TryGetValue(cdeMID, out var previousTaskInfo))
{
if (previousTaskInfo.senderThing.HistoryToken == this.HistoryToken && previousTaskInfo.senderThing.IsEqual(this) && previousTaskInfo.senderThing.IsHistoryTokenCurrent() && !previousTaskInfo.task.IsCompleted && !previousTaskInfo.cancelSource.IsCancellationRequested)
{
return(true);
}
}
CancelSender(myBaseThing, masterToken);
var cancelTokenSource = CancellationTokenSource.CreateLinkedTokenSource(masterToken, TheBaseAssets.MasterSwitchCancelationToken);
var senderTaskInfo = new SenderTaskInfo {
owner = myBaseThing, senderThing = senderClone, cancelSource = cancelTokenSource
};
var task = TheCommonUtils.cdeRunTaskChainAsync("HistorySenderLoop", senderLoop, senderTaskInfo, true);
//var task = senderLoop(senderTaskInfo);
senderTaskInfo.task = task;
pendingHistoryLoops[this.cdeMID] = senderTaskInfo;
return(true);
}
