/// <summary>
/// Добавляет подписку.
/// </summary>
public MessageBusSubscriber AddSubscription(string key, Action <string, string> handler)
{
ConcurrentDictionary <MessageBusSubscriber, MessageBusSubscriber> keySubscriptions;
if (!_subscriptions.TryGetValue(key, out keySubscriptions))
{
keySubscriptions = _subscriptions.GetOrAdd(key, new ConcurrentDictionary <MessageBusSubscriber, MessageBusSubscriber>());
}
MessageBusSubscriber subscriber = null;
// ReSharper disable AccessToModifiedClosure
subscriber = new MessageBusSubscriber(handler, () => RemoveSubscription(keySubscriptions, subscriber));
// ReSharper restore AccessToModifiedClosure
_syncKeySubscriptions.EnterWriteLock();
try
{
keySubscriptions.TryAdd(subscriber, subscriber);
}
finally
{
_syncKeySubscriptions.ExitWriteLock();
}
return(subscriber);
}
private void RemoveSubscription(ConcurrentDictionary <MessageBusSubscriber, MessageBusSubscriber> keySubscriptions, MessageBusSubscriber subscriber)
{
_syncKeySubscriptions.EnterWriteLock();
try
{
keySubscriptions.TryRemove(subscriber, out subscriber);
}
finally
{
_syncKeySubscriptions.ExitWriteLock();
}
}