protected override async ValueTask Subscribe(CancellationToken cancellationToken)
{
var settings = Options.SubscriptionSettings ?? new PersistentSubscriptionSettings(Options.ResolveLinkTos);
try {
_subscription = await LocalSubscribe(HandleEvent, HandleDrop, cancellationToken).NoContext();
}
catch (PersistentSubscriptionNotFoundException) {
await CreatePersistentSubscription(settings, cancellationToken);
_subscription = await LocalSubscribe(HandleEvent, HandleDrop, cancellationToken).NoContext();
}
void HandleDrop(
PersistentSubscription __,
SubscriptionDroppedReason reason,
Exception?exception
)
=> Dropped(EsdbMappings.AsDropReason(reason), exception);
async Task HandleEvent(
PersistentSubscription subscription,
ResolvedEvent re,
int?retryCount,
CancellationToken ct
)
{
var context = CreateContext(re, ct)
.WithItem(ResolvedEventKey, re)
.WithItem(SubscriptionKey, subscription);
try {
await Handler(context).NoContext();
LastProcessed = EventPosition.FromContext(context);
await Ack(context).NoContext();
}
catch (Exception e) {
await Nack(context, e).NoContext();
}
}
}