private async Task <Guid> SubscribeAsync(Action <MapEventHandlers <TKey, TValue> > events, Maybe <TKey> key, IPredicate predicate, bool includeValues, object state, CancellationToken cancellationToken)
{
if (events == null)
{
throw new ArgumentNullException(nameof(events));
}
var handlers = new MapEventHandlers <TKey, TValue>();
events(handlers);
var flags = default(MapEventTypes);
foreach (var handler in handlers)
{
flags |= handler.EventType;
}
// 0: no entryKey, no predicate
// 1: entryKey, no predicate
// 2: no entryKey, predicate
// 3: entryKey, predicate
var mode = key.Match(1, 0) + (predicate != null ? 2 : 0);
var keyv = key.ValueOrDefault();
var subscribeRequest = mode switch
{
0 => MapAddEntryListenerCodec.EncodeRequest(Name, includeValues, (int)flags, Cluster.IsSmartRouting),
1 => MapAddEntryListenerToKeyCodec.EncodeRequest(Name, ToData(keyv), includeValues, (int)flags, Cluster.IsSmartRouting),
2 => MapAddEntryListenerWithPredicateCodec.EncodeRequest(Name, ToData(predicate), includeValues, (int)flags, Cluster.IsSmartRouting),
3 => MapAddEntryListenerToKeyWithPredicateCodec.EncodeRequest(Name, ToData(keyv), ToData(predicate), includeValues, (int)flags, Cluster.IsSmartRouting),
_ => throw new NotSupportedException()
};
var subscription = new ClusterSubscription(
subscribeRequest,
ReadSubscribeResponse,
CreateUnsubscribeRequest,
ReadUnsubscribeResponse,
HandleEventAsync,
new MapSubscriptionState(mode, Name, handlers, state));
await Cluster.Events.AddSubscriptionAsync(subscription, cancellationToken).CfAwait();
return(subscription.Id);
}
public MapSubscriptionState(int mode, string name, MapEventHandlers <TKey, TValue> handlers, object state)
: base(name, handlers, state)
{
Mode = mode;
}
