async Task <StreamFetcher <MongoDB.Events.Event> > CreateStreamFetcherForEventLog(ScopeId scopeId, CancellationToken cancellationToken) =>
new StreamFetcher <MongoDB.Events.Event>(
await _streams.GetEventLog(scopeId, cancellationToken).ConfigureAwait(false),
Builders <MongoDB.Events.Event> .Filter,
_ => _.EventLogSequenceNumber,
Builders <MongoDB.Events.Event> .Projection.Expression(_ => _eventConverter.ToRuntimeStreamEvent(_)),
Builders <MongoDB.Events.Event> .Projection.Expression(_ => new Artifacts.Artifact(_.Metadata.TypeId, _.Metadata.TypeGeneration)));
/// <inheritdoc/>
public async Task <CommittedEvents> FetchCommittedEvents(ScopeId scope, EventLogSequenceNumber from, int limit, CancellationToken cancellationToken)
{
try
{
var eventLog = await GetEventLog(scope, cancellationToken).ConfigureAwait(false);
var events = await eventLog
.Find(_eventFilter.Gte(e => e.EventLogSequenceNumber, from))
.Sort(Builders <MongoDB.Events.Event> .Sort.Ascending(_ => _.EventLogSequenceNumber))
.Limit(limit)
.ToListAsync(cancellationToken).ConfigureAwait(false);
return(new CommittedEvents(
events.Select(_ => _eventConverter.ToRuntimeStreamEvent(_))
.Select(_ => _.Event)
.ToList()));
}
catch (Exception ex)
{
throw new EventStoreUnavailable("Mongo wait queue is full", ex);
}
}
