private static void InternalUnobservedTaskExceptionHandler(object sender, UnobservedTaskExceptionEventArgs e)
{
var aggrException = e.Exception;
var baseException = aggrException.GetBaseException();
var tplTask = (Task)sender;
var contextObj = tplTask.AsyncState;
var context = contextObj as ISchedulingContext;
try
{
if (unobservedExceptionHandler != null)
{
unobservedExceptionHandler(context, baseException);
}
}
finally
{
if (e.Observed)
{
logger.Info(ErrorCode.Runtime_Error_100311, "UnobservedExceptionsHandlerClass caught an UnobservedTaskException which was successfully observed and recovered from. BaseException = {0}. Exception = {1}",
baseException.Message, TraceLogger.PrintException(aggrException));
}
else
{
var errorStr = String.Format("UnobservedExceptionsHandlerClass Caught an UnobservedTaskException event sent by {0}. Exception = {1}",
OrleansTaskExtentions.ToString((Task)sender), TraceLogger.PrintException(aggrException));
logger.Error(ErrorCode.Runtime_Error_100005, errorStr);
logger.Error(ErrorCode.Runtime_Error_100006, "Exception remained UnObserved!!! The subsequent behaivour depends on the ThrowUnobservedTaskExceptions setting in app config and .NET version.");
}
}
}
internal Task Cancel()
{
// propagate the exception from the _cancellationTokenSource.Cancel back to the caller
// but also cancel _targetGrainReferences.
Task task = OrleansTaskExtentions.WrapInTask(_cancellationTokenSource.Cancel);
if (_targetGrainReferences.IsEmpty)
{
return(task);
}
var cancellationTasks = _targetGrainReferences
.Select(pair => pair.Value.AsReference <ICancellationSourcesExtension>()
.CancelRemoteToken(this))
.ToList();
cancellationTasks.Add(task);
return(Task.WhenAll(cancellationTasks));
}