async Task EventAppeared(
EventStoreCatchUpSubscription _,
ResolvedEvent resolvedEvent)
{
if (resolvedEvent.Event.EventType.StartsWith("$"))
{
return;
}
var @event = resolvedEvent.Deserialze();
_log.Debug("Projecting event {event}", @event.ToString());
try
{
await PrometheusMetrics.Measure(async() =>
{
await Task.WhenAll(_eventHandlers.Select(x => x(@event)));
await _checkpointStore.StoreCheckpoint(
resolvedEvent.OriginalPosition.Value
);
}, PrometheusMetrics.SubscriptionTimer(_subscriptionName));
PrometheusMetrics.ObserveLeadTime(
resolvedEvent.Event.EventType,
resolvedEvent.Event.Created,
_subscriptionName);
}
catch (Exception e)
{
_log.Error(
e,
"Error occured when projecting the event {event}",
@event
);
throw;
}
}
