private async Task <IEnumerable <EventDocument> > GetEventDocumentsBackward(Expression <Func <EventDocument, bool> > predicate, int start, int count)
{
var skipCount = start < 1 ? 0 : start - 1;
return(await Task.FromResult(_cosmosClient.GetDocumentQuery(predicate, _cosmosDBConfigurations.EventContainerName)
.OrderByDescending(e => e.Position)
.Skip(skipCount)
.Take(count)
.ToList()));
}
async Task <IEnumerable <EventDocument> > IOperationHandler <GetEventDocumentsForward, IEnumerable <EventDocument> > .Handle(GetEventDocumentsForward operation, CancellationToken cancellationToken)
{
var skipCount = operation.Start < 1 ? 0 : operation.Start - 1;
var result = new List <EventDocument>();
await _cosmosClient.GetDocumentQuery(operation.Predicate, _cosmosDBConfigurations.EventContainerName)
.OrderBy(e => e.Position)
.Skip(skipCount)
.Take(operation.Count)
.ToFeedIterator(eDoc => result.Add(eDoc))
.ConfigureAwait(false);
return(result);
}
private async Task <Optional <SnapshotDocument> > GetLastSnapshotStreamDocumentByIdAsync(string id)
{
try
{
var document = _cosmosDbClient
.GetDocumentQuery <SnapshotDocument>(stream => stream.StreamId == id, _cosmosDBConfigurations.SnapshotContainerName)
.OrderByDescending(s => s.EventPosition)
.ToList()
.FirstOrDefault();
return(document.ToOptional());
}
catch (CosmosException)
{
return(Optional <SnapshotDocument> .Empty);
}
}
