public SubscriptionToken Subscribe <TEventBase>(string topic, Action <TEventBase> action) where TEventBase : EventBase
{
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
lock (SubscriptionsLock)
{
if (!_subscriptions.ContainsKey(topic))
{
Dictionary <Type, List <ISubscription> > tmpDict = new Dictionary <Type, List <ISubscription> >();
tmpDict.Add(typeof(TEventBase), new List <ISubscription>());
_subscriptions.Add(topic, tmpDict);
}
var token = new SubscriptionToken(typeof(TEventBase));
_subscriptions[topic][typeof(TEventBase)].Add(new Subscription <TEventBase>(action, token));
return(token);
}
}
public void Unsubscribe(SubscriptionToken token)
{
if (token == null)
{
throw new ArgumentNullException(nameof(token));
}
lock (SubscriptionsLock)
{
foreach (var item in _subscriptions.Values)
{
if (item.ContainsKey(token.EventItemType))
{
List <ISubscription> list = item[token.EventItemType];
ISubscription subscriptionToRemove = list.FirstOrDefault(x => x.SubscriptionToken.Token == token.Token);
if (subscriptionToRemove != null)
{
item[token.EventItemType].Remove(subscriptionToRemove);
break;
}
}
}
}
}
public Subscription(Action <TEventBase> action, SubscriptionToken subscriptionToken)
{
_action = action ?? throw new ArgumentNullException(nameof(action));
SubscriptionToken = subscriptionToken ?? throw new ArgumentNullException(nameof(subscriptionToken));
}