private BusEventSubscriptionToken AddSubscriptionInternal <TBusEvent>(Action <TBusEvent> deliveryAction, Func <TBusEvent, bool> eventFilter, bool strongReference, IBusEventProxy proxy)
where TBusEvent : class, IBusEvent
{
if (deliveryAction == null)
{
throw new ArgumentNullException("deliveryAction");
}
if (eventFilter == null)
{
throw new ArgumentNullException("eventFilter");
}
if (proxy == null)
{
throw new ArgumentNullException("proxy");
}
lock (m_subscriptionsPadlock)
{
List <SubscriptionItem> currentSubscriptions;
if (!m_subscriptions.TryGetValue(typeof(TBusEvent), out currentSubscriptions))
{
currentSubscriptions = new List <SubscriptionItem>();
m_subscriptions[typeof(TBusEvent)] = currentSubscriptions;
}
var subscriptionToken = new BusEventSubscriptionToken(this, typeof(TBusEvent));
IBusEventSubscription subscription;
if (strongReference)
{
subscription = new StrongBusEventSubscription <TBusEvent>(subscriptionToken, deliveryAction, eventFilter);
}
else
{
subscription = new WeakBusEventSubscription <TBusEvent>(subscriptionToken, deliveryAction, eventFilter);
}
currentSubscriptions.Add(new SubscriptionItem(proxy, subscription));
return(subscriptionToken);
}
}
/// <summary>
/// Subscribe to a bus event type with the given destination and delivery action.
/// Bus events will be delivered via the specified proxy.
///
/// All bus events of this type will be delivered.
/// </summary>
/// <typeparam name="TBusEvent">Type of bus event</typeparam>
/// <param name="deliveryAction">Action to invoke when bus event is delivered</param>
/// <param name="useStrongReferences">Use strong references to destination and deliveryAction </param>
/// <param name="proxy">Proxy to use when delivering the bus events</param>
/// <returns>BusEventSubscriptionToken used to unsubscribing</returns>
public BusEventSubscriptionToken Subscribe <TBusEvent>(Action <TBusEvent> deliveryAction, bool useStrongReferences, IBusEventProxy proxy) where TBusEvent : class, IBusEvent
{
return(AddSubscriptionInternal <TBusEvent>(deliveryAction, (m) => true, useStrongReferences, proxy));
}
/// <summary>
/// Subscribe to a bus event type with the given destination and delivery action with the given filter.
/// Bus events will be delivered via the specified proxy.
/// All references are held with WeakReferences
///
/// Only bus events that "pass" the filter will be delivered.
/// </summary>
/// <typeparam name="TBusEvent">Type of bus event</typeparam>
/// <param name="deliveryAction">Action to invoke when bus event is delivered</param>
/// <param name="useStrongReferences">Use strong references to destination and deliveryAction </param>
/// <param name="proxy">Proxy to use when delivering the bus events</param>
/// <returns>BusEventSubscriptionToken used to unsubscribing</returns>
public BusEventSubscriptionToken Subscribe <TBusEvent>(Action <TBusEvent> deliveryAction, Func <TBusEvent, bool> eventFilter, bool useStrongReferences, IBusEventProxy proxy) where TBusEvent : class, IBusEvent
{
return(AddSubscriptionInternal <TBusEvent>(deliveryAction, eventFilter, useStrongReferences, proxy));
}
public SubscriptionItem(IBusEventProxy proxy, IBusEventSubscription subscription)
{
Proxy = proxy;
Subscription = subscription;
}
