/// <summary>
/// Links the publisher to a topic.
/// </summary>
/// <param name="publisherName">Name of the publisher.</param>
/// <param name="topicName">Name of the topic.</param>
/// <returns>PublisherClient instance.</returns>
internal static PublisherClient LinkPublisherTopic(string publisherName, string topicName)
{
if (Utilities.IsNullOrWhiteSpace(publisherName))
{
throw new ArgumentNullException("publisherName", "Publisher name cannot be null or empty.");
}
if (Utilities.IsNullOrWhiteSpace(topicName))
{
throw new ArgumentNullException("topicName", "Topic name cannot be null or empty.");
}
PublisherClient publisher = GetOrCreatePublisher(publisherName);
Topic topic = GetOrCreateTopic(topicName);
publisher.AddTopicInternal(topic);
topic.AddPublisherInternal(publisher);
return(publisher);
}
/// <summary>
/// Deletes the topic.
/// </summary>
/// <param name="topicName">Name of the topic.</param>
public static void DeleteTopic(string topicName)
{
if (Utilities.IsNullOrWhiteSpace(topicName))
{
throw new ArgumentNullException("topicName", "Topic name cannot be null or empty.");
}
lock (Utilities.GetSyncRoot(Topics))
{
if (Topics.ContainsKey(topicName))
{
Topic topic = Topics[topicName];
foreach (var publisherName in topic.Publishers)
{
topic.RemovePublisherInternal(publisherName);
PublisherClient publisher = GetPublisher(publisherName);
if (publisher != null)
{
publisher.RemoveTopicInternal(topicName);
}
}
foreach (var subscriptionName in topic.Subscriptions)
{
topic.RemovePublisherInternal(subscriptionName);
SubscriptionClient subscription = GetSubscription(subscriptionName);
if (subscription != null)
{
subscription.RemoveTopicInternal(topicName);
}
}
Topics.Remove(topicName);
}
}
}
/// <summary>
/// Gets or creates a publisher.
/// </summary>
/// <param name="publisherName">Name of the publisher.</param>
/// <returns>PublisherClient instance.</returns>
public static PublisherClient GetOrCreatePublisher(string publisherName)
{
if (Utilities.IsNullOrWhiteSpace(publisherName))
{
throw new ArgumentNullException("publisherName", "Publisher name cannot be null or empty.");
}
lock (Utilities.GetSyncRoot(Publishers))
{
if (Publishers.ContainsKey(publisherName))
{
return(Publishers[publisherName]);
}
else
{
PublisherClient result = new PublisherClient(publisherName);
Publishers.Add(publisherName, result);
return(result);
}
}
}
