public void startDelivery(final TopicSubscriber topicSubscriber,
MessageHandler messageHandler)
throws ClientNotSubscribedException, AlreadyStartDeliveryException {
ActiveSubscriber ss = getActiveSubscriber(topicSubscriber);
if (null == ss) {
throw new ClientNotSubscribedException("Client is not yet subscribed to " + topicSubscriber);
}
if (logger.isDebugEnabled()) {
logger.debug("Start delivering message for {} using message handler {}",
va(topicSubscriber, messageHandler));
}