Method Detail

• onRegistered

  void onRegistered(String topicPath,
                    Registration registration)

  Called when the handler has been successfully registered with the server.

  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, registration will be closed, and the session error handler will be notified. To change the handler, first close the previous handler.

  Parameters:

  topicPath - the path that the handler is active for

  registration - allows the handler to be closed

• onClose

  void onClose(String topicPath)

  Called if the handler is closed. The handler will be closed if the session is closed after the handler has been registered, or if the handler is unregistered using close.

  No further calls will be made for the handler.

  Parameters:

  topicPath - the branch of the topic tree for which the handler was registered

• onError

  void onError(String topicPath,
               ErrorReason errorReason)

  Notification of a contextual error related to this handler. This is analogous to an unchecked exception being raised. Situations in which onError is called include the session being closed before the handler is registered, a communication timeout, or a problem with the provided parameters. No further calls will be made to this handler.

  Parameters:

  topicPath - the branch of the topic tree for which the handler was registered

  errorReason - a value representing the error; this can be one of constants defined in ErrorReason, or a feature-specific reason