private async Task <List <long> > StreamObjectToVersion(DomainObject domainObject, long maxVersion, string identifier)
{
// skip streaming entirely if the object is at or above the desired version
if (domainObject.MetaVersion >= maxVersion)
{
return(new List <long>());
}
var appliedEvents = new List <long>();
await _eventStore.ReplayEventsAsStream(
tuple =>
{
var(recordedEvent, domainEvent) = tuple;
// stop at the designated max-version
if (recordedEvent.EventNumber > maxVersion)
{
return(false);
}
var versionBefore = domainObject.CurrentVersion;
domainObject.ApplyEvent(new ReplayedEvent
{
UtcTime = recordedEvent.UtcTime.ToUniversalTime(),
Version = recordedEvent.EventNumber,
DomainEvent = domainEvent
});
if (domainObject.CurrentVersion > versionBefore)
{
_logger.LogTrace($"applied event {recordedEvent.EventNumber} / '{recordedEvent.EventType}' to '{identifier}'");
appliedEvents.Add(recordedEvent.EventNumber);
}
return(true);
}, startIndex : domainObject.MetaVersion);
_logger.LogDebug($"applied {appliedEvents.Count} events to '{identifier}': {string.Join(", ", appliedEvents)}");
return(appliedEvents);
}