private async Task SetOrResetTimerValue(Guid processId, string timerName, DateTime?newValue)
{
var parameterName = GetTimerValueParameterName(timerName);
var processInstance = _runtime.Builder.GetProcessInstance(processId);
var oldStatus = _runtime.PersistenceProvider.GetInstanceStatus(processId);
await _runtime.SetProcessNewStatus(processInstance, ProcessStatus.Running, true).ConfigureAwait(false);
try
{
_runtime.PersistenceProvider.FillProcessParameters(processInstance);
if (newValue.HasValue)
{
processInstance.SetParameter(parameterName, newValue.Value, ParameterPurpose.Persistence);
}
else
{
processInstance.SetParameter <DateTime?>(parameterName, null, ParameterPurpose.Persistence);
}
var currentTimers = processInstance.ProcessScheme.GetTimerTransitionForActivity(processInstance.CurrentActivity, ForkTransitionSearchType.Both).ToList();
var timer = currentTimers.Where(t => t.Trigger.Timer != null && t.Trigger.Timer.Name.Equals(timerName)).Select(t => t.Trigger.Timer).FirstOrDefault();
if (timer != null && !timer.NotOverrideIfExists)
{
if (_startStopSemaphore.Wait(DefaultWaitTimeout))
{
try
{
var wasRunning = !_stopped;
_stopped = true;
_timer.Change(Timeout.Infinite, Timeout.Infinite);
_cancellationTokenSource.Cancel();
var needToClearTimer = !newValue.HasValue && (timer.Value.Equals(ImmediateTimerValue) || timer.Value.Equals(InfinityTimerValue));
if (needToClearTimer)
{
var timersIgnoreList = currentTimers.Where(t => t.Trigger.Timer != null && !t.Trigger.Timer.Name.Equals(timerName))
.Select(t => t.Trigger.Timer.Name)
.Distinct()
.ToList();
_runtime.PersistenceProvider.ClearTimers(processInstance.ProcessId, timersIgnoreList);
}
RefreshOrRegisterTimer(processInstance, new List <TimerDefinition> {
timer
});
_runtime.PersistenceProvider.SavePersistenceParameters(processInstance);
await _runtime.SetProcessNewStatus(processInstance, oldStatus, true).ConfigureAwait(false);
if (wasRunning)
{
_stopped = false;
_cancellationTokenSource = new CancellationTokenSource();
RefreshInterval();
}
}
finally
{
_startStopSemaphore.Release();
}
}
else
{
throw new TimerManagerException("Can't start change timer value. Wait timeout expired.");
}
}
else
{
_runtime.PersistenceProvider.SavePersistenceParameters(processInstance);
await _runtime.SetProcessNewStatus(processInstance, oldStatus, true).ConfigureAwait(false);
}
}
catch
{
await _runtime.SetProcessNewStatus(processInstance, oldStatus, true).ConfigureAwait(false);
throw;
}
}
