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();
}
}
}
protected override async ValueTask Subscribe(CancellationToken cancellationToken)
{
var filterOptions = new SubscriptionFilterOptions(
Options.EventFilter ?? EventTypeFilter.ExcludeSystemEvents(),
Options.CheckpointInterval,
async(_, p, ct) => {
// This doesn't allow to report tie time gap
LastProcessed = new EventPosition(p.CommitPosition, DateTime.Now);
await StoreCheckpoint(LastProcessed, ct).NoContext();
}
);
var(_, position) = await GetCheckpoint(cancellationToken).NoContext();
var fromAll = position == null ? FromAll.Start : FromAll.After(new Position(position.Value, position.Value));
Subscription = await EventStoreClient.SubscribeToAllAsync(
fromAll,
HandleEvent,
Options.ResolveLinkTos,
HandleDrop,
filterOptions,
Options.Credentials,
cancellationToken
).NoContext();
async Task HandleEvent(
global::EventStore.Client.StreamSubscription _,
ResolvedEvent re,
CancellationToken ct
)
=> await HandleInternal(CreateContext(re, ct)).NoContext();
void HandleDrop(
global::EventStore.Client.StreamSubscription _,
SubscriptionDroppedReason reason,
Exception?ex
)
=> Dropped(EsdbMappings.AsDropReason(reason), ex);
}
