/// <summary>
///cqgis: 订阅消息
/// </summary>
/// <param name="type"></param>
/// <param name="action"></param>
/// <returns></returns>
public SubscriptionToken Subscribe(Type type, Action <EventBase> action)
{
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
lock (SubscriptionsLock)
{
if (!_subscriptions.ContainsKey(type))
{
_subscriptions.Add(type, new List <ISubscription>());
}
var token = new SubscriptionToken(type);
_subscriptions[type].Add(new Subscription <EventBase>(action, token));
return(token);
}
}
/// <summary>
///cqgis: 取消订阅
/// </summary>
/// <param name="token"></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);
}
}
}
}