private async Task PublishAsync(
IEnumerable <LiteDBChunk> chunks,
long start,
ISubscription subscription,
bool broadcastPosition,
CancellationToken cancellationToken)
{
await subscription.OnStartAsync(start).ConfigureAwait(false);
long positionOrIndex = 0;
try
{
foreach (var chunk in chunks)
{
cancellationToken.ThrowIfCancellationRequested();
positionOrIndex = broadcastPosition ? chunk.Position : chunk.Index;
if (chunk.Payload != null)
{
chunk.Payload = _options.PayloadSerializer.Deserialize((string)chunk.Payload);
}
var ok = await subscription.OnNextAsync(chunk).ConfigureAwait(false);
if (!ok)
{
await subscription.StoppedAsync(positionOrIndex).ConfigureAwait(false);
return;
}
}
}
catch (TaskCanceledException ex)
{
_logger.LogWarning($"PushToSubscriber: {ex.Message}.\n{ex.StackTrace}");
await subscription.StoppedAsync(positionOrIndex).ConfigureAwait(false);
}
catch (Exception e)
{
_logger.LogError($"Error During PushToSubscriber: {e.Message}.\n{e.StackTrace}");
await subscription.OnErrorAsync(positionOrIndex, e).ConfigureAwait(false);
}
await subscription.CompletedAsync(positionOrIndex).ConfigureAwait(false);
}
public Task <bool> OnNextAsync(IChunk chunk)
{
_logger.LogDebug("OnNext {Position}", chunk.Position);
if (chunk.Position != Position + 1)
{
if (_stopOnHole)
{
RetriesOnHole++;
_logger.LogDebug("Hole detected on {Position} - {Retries}", chunk.Position, RetriesOnHole);
return(Task.FromResult(false));
}
_logger.LogWarning("Skipping hole on {Position}", chunk.Position);
}
RetriesOnHole = 0;
_stopOnHole = true;
Position = chunk.Position;
Processed++;
return(_subscription.OnNextAsync(chunk));
}
public Task <bool> OnNextAsync(IChunk chunk)
{
_logger.LogDebug("OnNext {Position}", chunk.Position);
//Wait for holes if this commit is not sequential and it is greater that starting
//commit to sequence stream.
if (chunk.Position != Position + 1 && chunk.Position > _positionToStartSequencing)
{
if (_stopOnHole)
{
RetriesOnHole++;
_logger.LogDebug("Hole detected on {Position} - {Retries}", chunk.Position, RetriesOnHole);
return(Task.FromResult(false));
}
_logger.LogWarning("Skipping hole on {Position}", chunk.Position);
}
RetriesOnHole = 0;
_stopOnHole = true;
Position = chunk.Position;
Processed++;
return(_subscription.OnNextAsync(chunk));
}