private void RemoveSubscription(
string eventName,
Subscription subsToRemove
)
{
if (subsToRemove == null)
{
return;
}
// a necessidade da reatribuição abaixo é justificada pelo uso desta lista durante o consumo.
// se a mesma for modificada, será gerada uma exceção de coleção modificada no consumo de mensagens.
_handlers[eventName] = new List <Subscription>(_handlers[eventName]);
_handlers[eventName].Remove(subsToRemove);
if (_handlers[eventName].Any())
{
return;
}
_handlers.Remove(eventName);
if (OnEventRemoved != null)
{
OnEventRemoved.Invoke(this, new EventEventArgs(eventName));
}
}
/// <summary>
///
/// </summary>
/// <typeparam name="TEvent"></typeparam>
/// <typeparam name="TEventHandler"></typeparam>
public void RemoveSubscription <TEvent, TEventHandler>()
where TEventHandler : IEventHandler <TEvent>
{
var eventName = GetEventKey <TEvent>();
if (!HasSubscriptions(eventName))
{
return;
}
var handlerType = typeof(TEventHandler);
var eventHandler = eventHandlers[eventName].SingleOrDefault(_ => _ == handlerType);
if (eventHandler == null)
{
return;
}
eventHandlers[eventName].Remove(eventHandler);
if (!eventHandlers[eventName].Any())
{
eventHandlers.Remove(eventName);
eventTypes.Remove(eventName);
OnEventRemoved.Invoke(this, eventName);
}
}
public void RemoveSubscription <TEvent, TEventHandler>()
where TEvent : Event
where TEventHandler : IEventHandler <TEvent>
{
var eventName = GetEventKey <TEvent>();
var handlerToRemoveType = typeof(TEventHandler);
var handlerToRemove = _handlers[eventName].SingleOrDefault(eventHandler => eventHandler.GetType() == handlerToRemoveType);
if (handlerToRemove != null)
{
_handlers[eventName].Remove(handlerToRemove);
if (!_handlers[eventName].Any())
{
_handlers.Remove(eventName);
var eventType = _eventTypes.SingleOrDefault(e => e.Name == eventName);
if (eventType != null)
{
_eventTypes.Remove(eventType);
}
OnEventRemoved.Invoke(this, eventName);
}
}
}
private void RaiseOnEventRemoved(string eventName)
{
OnEventRemoved?.Invoke(this, eventName);
}
protected void RaiseOnEventRemoved(string eventName)
{
OnEventRemoved?.Invoke(this, eventName);
}
private void RemoveEvent(string eventName)
{
_eventHandlers.Remove(eventName);
OnEventRemoved?.Invoke(this, eventName);
}