private static void MonitorProcessingTaskPrematureCompletion(Task processingTask, ISequence sequence)
{
if (sequence.ParentSequence != null)
{
return;
}
Task.Run(
async() =>
{
try
{
await processingTask.ConfigureAwait(false);
// Abort only parent sequences and don't consider the enumeration as aborted if the
// sequence is actually complete
if (sequence.ParentSequence != null || sequence.IsComplete)
{
return;
}
// Call AbortAsync to abort the uncompleted sequence, to avoid unreleased locks.
// The reason behind this call here may be counterintuitive but with
// SequenceAbortReason.EnumerationAborted a commit is in fact performed.
await sequence.AbortAsync(SequenceAbortReason.EnumerationAborted)
.ConfigureAwait(false);
}
catch (Exception exception)
{
if (!sequence.IsPending || sequence.ParentSequence != null)
{
return;
}
await sequence.AbortAsync(SequenceAbortReason.Error, exception)
.ConfigureAwait(false);
}
finally
{
if (sequence is ISequenceImplementation sequenceImplementation &&
sequenceImplementation.ShouldCreateNewActivity)
{
sequenceImplementation.Activity?.Stop();
}
}
});
}
private async Task <Task> PublishStreamProviderAsync(ISequence sequence, ConsumerPipelineContext context)
{
_logger.LogTraceWithMessageInfo(
IntegrationEventIds.LowLevelTracing,
$"Publishing {sequence.GetType().Name} '{sequence.SequenceId}'...",
context);
var publisher = context.ServiceProvider.GetRequiredService <IStreamPublisher>();
var processingTasks = await publisher.PublishAsync(sequence.StreamProvider).ConfigureAwait(false);
if (processingTasks.Count == 0)
{
_logger.LogTraceWithMessageInfo(
IntegrationEventIds.LowLevelTracing,
$"No subscribers for {sequence.GetType().Name} '{sequence.SequenceId}'.",
context);
return(Task.CompletedTask);
}
return(Task.Run(
async() =>
{
try
{
if (processingTasks.Count == 1)
{
await processingTasks.First().ConfigureAwait(false);
return;
}
using var cancellationTokenSource = new CancellationTokenSource();
var tasks = processingTasks.Select(task => task.CancelOnExceptionAsync(cancellationTokenSource))
.ToList();
await Task.WhenAny(tasks).ConfigureAwait(false);
if (!sequence.IsComplete && tasks.All(task => !task.IsFaulted))
{
// Call AbortAsync to abort the uncompleted sequence, to avoid unreleased locks.
// The reason behind this call here may be counterintuitive but with
// SequenceAbortReason.EnumerationAborted a commit is in fact performed.
await sequence.AbortAsync(SequenceAbortReason.EnumerationAborted).ConfigureAwait(false);
}
await Task.WhenAll(processingTasks).ConfigureAwait(false);
}
catch (Exception exception)
{
await sequence.AbortAsync(SequenceAbortReason.Error, exception).ConfigureAwait(false);
sequence.Dispose();
}
finally
{
_logger.LogTraceWithMessageInfo(
IntegrationEventIds.LowLevelTracing,
$"{sequence.GetType().Name} '{sequence.SequenceId}' processing completed.",
context);
}
}));
}