public Subscription(Action <TEventBase> action, SubscriptionToken token)
{
if (action == null)
{
throw new ArgumentNullException("action");
}
if (token == null)
{
throw new ArgumentNullException("token");
}
_action = action;
SubscriptionToken = token;
}
/// <summary>
/// Subscribes to the specified event type with the specified action
/// </summary>
/// <typeparam name="TEventBase">The type of event</typeparam>
/// <param name="action">The Action to invoke when an event of this type is published</param>
/// <returns>A <see cref="SubscriptionToken"/> to be used when calling <see cref="Unsubscribe"/></returns>
public SubscriptionToken Subscribe <TEventBase>(Action <TEventBase> action) where TEventBase : EventBase
{
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
lock (SubscriptionsLock)
{
if (!_subscriptions.ContainsKey(typeof(TEventBase)))
{
_subscriptions.Add(typeof(TEventBase), new List <ISubscription>());
}
var token = new SubscriptionToken(typeof(TEventBase));
_subscriptions[typeof(TEventBase)].Add(new Subscription <TEventBase>(action, token));
return(token);
}
}
/// <summary>
/// Unsubscribe from the Event type related to the specified <see cref="SubscriptionToken"/>
/// </summary>
/// <param name="token">The <see cref="SubscriptionToken"/> received from calling the Subscribe method</param>
public void Unsubscribe(SubscriptionToken token)
{
if (token == null)
{
throw new ArgumentNullException(nameof(token));
}
lock (SubscriptionsLock)
{
if (_subscriptions.ContainsKey(token.EventItemType))
{
var allSubscriptions = _subscriptions[token.EventItemType];
var subscriptionToRemove = allSubscriptions.FirstOrDefault(x => x.SubscriptionToken.Token == token.Token);
if (subscriptionToRemove != null)
{
_subscriptions[token.EventItemType].Remove(subscriptionToRemove);
}
}
}
}
public Subscription(Action <TEventBase> action, SubscriptionToken token)
{
_action = action ?? throw new ArgumentNullException(nameof(action));
SubscriptionToken = token ?? throw new ArgumentNullException(nameof(token));
}