protected internal virtual bool IsSameMessageEventSubscriptionAlreadyPresent(EventSubscriptionDeclaration eventSubscription, string tenantId)
{
// look for subscriptions for the same name in db:
IList <EventSubscriptionEntity> subscriptionsForSameMessageName = EventSubscriptionManager.FindEventSubscriptionsByNameAndTenantId(EventType.Message.Name, eventSubscription.UnresolvedEventName, tenantId);
//TODO 缓存差异
// also look for subscriptions created in the session: 源码有值
IList <EventSubscriptionEntity> cachedSubscriptions = DbEntityCache.GetEntitiesByType <EventSubscriptionEntity>(typeof(EventSubscriptionEntity));
foreach (EventSubscriptionEntity cachedSubscription in cachedSubscriptions)
{
//TODO HasTenantId subscriptions
if (eventSubscription.UnresolvedEventName.Equals(cachedSubscription.EventName) && HasTenantId(cachedSubscription, tenantId) && !subscriptionsForSameMessageName.Contains(cachedSubscription))
{
subscriptionsForSameMessageName.Add(cachedSubscription);
}
}
// remove subscriptions deleted in the same command
//subscriptionsForSameMessageName = DbEntityManager.PruneDeletedEntities(subscriptionsForSameMessageName);
subscriptionsForSameMessageName = Context.CommandContext.PruneDeletedEntities <EventSubscriptionEntity>(subscriptionsForSameMessageName);
// remove subscriptions for different type of event (i.e. remove intermediate message event subscriptions)
subscriptionsForSameMessageName = FilterSubscriptionsOfDifferentType(eventSubscription, subscriptionsForSameMessageName);
return(subscriptionsForSameMessageName.Count > 0);
}
