public TopicDispatcher(ITopicFactory <T> topicFactory)
{
if (topicFactory == null)
{
throw new ArgumentNullException(nameof(topicFactory));
}
_client = topicFactory.Create();
}
public async Task Connect(string topicId)
{
if (string.IsNullOrEmpty(topicId))
{
throw new ArgumentException("Topic id cannot be null or empty.", nameof(topicId));
}
var previousTopicId = _state.TopicId;
ITopic topic;
if (previousTopicId != null && previousTopicId != topicId)
{
topic = await _topicFactory.Create(previousTopicId);
await topic.Send(new Disconnected(_state.ConnectionId));
}
topic = await _topicFactory.Create(topicId);
await topic.Send(new Connected(_state.ConnectionId, topicId));
_state.TopicId = topicId;
}
