/// <summary>
/// Subscribe to the given topic with a handler function.
/// </summary>
/// <param name="topic">pub-sub topic</param>
public void Subscribe <T>(PubSubEventHandler <T> handler) where T : PubSubEvent
{
string topic = PubSubEvent.GetTopicForEventType(typeof(T));
MessageHandlers.Add(topic, new MessageHandler <T>(handler, this.Serializer));
string topicString = topic.ToString();
this.Socket.Subscribe(topicString);
}
public void TestTopicUniqueness()
{
// Gather list of all PubSubEvent sub-classes.
IEnumerable <Type> pubSubEventTypes = typeof(PubSubEvent).GetTypeInfo().Assembly.GetTypes()
.Where(type => typeof(PubSubEvent).IsAssignableFrom(type) && type != typeof(PubSubEvent));
// Ensure all PubSubEvents have unique topics.
HashSet <string> topics = new HashSet <string>();
foreach (Type eventType in pubSubEventTypes)
{
string topic = PubSubEvent.GetTopicForEventType(eventType);
Assert.True(topics.Add(topic));
}
}
public void TestTopicForNonSubclass()
{
// retrieving the topic for a class that doesn't inherit the pubsub event class should raise an error.
Assert.Throws <ArgumentException>(() => PubSubEvent.GetTopicForEventType(typeof(TestEventNotSubclass)));
}
