The interface for callback handlers that establish a server side control presence for the client ISession at a particular branch of the topic tree.
public interface ITopicTreeHandler
Called when the handler has been registered at the server and is now active.
void OnActive(string topicPath, IRegisteredHandler registeredHandler)
The path that the handler is active for.
The registration that is able to close the handler.
A session can register a single handler of each type for a given branch
of the topic tree. If there is already a handler registered for the topic
path the operation will fail,
registeredHandler will be closed,
and the session error handler will be notified. To change the handler,
first close the previous handler using CloseAsync().
Called if the handler is closed.
void OnClose(string topicPath)
The branch of the topic tree for which the handler was registered.
The handler will be closed if the session is closed after the handler has been registered, or if the handler is unregistered using CloseAsync().