Interface which specifies a response handler for requests dispatched through a filter.
Notification of a contextual error related to this handler. This is
analogous to an Error being thrown. 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.
Called to indicate a response has been received.
session ID of the session that sent the response
Called when a response from a session results in an error.
sessionID of the session in error