private async Task PopulateCategory(CancellationToken cancellationToken)
{
_logger?.LogDebug("Populating Category in existing events...");
var fb = Builders <RecordedEventDocument> .Filter;
var cursor = await _events
.Find(fb.Not(fb.Exists(e => e.Category)))
.ToCursorAsync(cancellationToken);
var batch = new List <WriteModel <RecordedEventDocument> >();
while (await cursor.MoveNextAsync(cancellationToken))
{
batch.Clear();
foreach (var document in cursor.Current)
{
var category = _streamNameResolver.AggregateName(document.Stream);
var definition = new UpdateOneModel <RecordedEventDocument>(
Builders <RecordedEventDocument> .Filter.Where(e => e.Id == document.Id),
Builders <RecordedEventDocument> .Update.Set(e => e.Category, category)
);
batch.Add(definition);
}
if (batch.Count > 0)
{
await _events.BulkWriteAsync(batch, null, cancellationToken);
}
}
}
