关于activemq，请问这两个topic

Question

我看servicemix的源代码中jmsflow对象有如下代码在init方法中有如下的代码
//init()
....
broadcastSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);  
broadcastTopic = broadcastSession.createTopic(broadcastDestinationName);  
topicProducer = broadcastSession.createProducer(broadcastTopic);  topicProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
....在该对象的start方法中有如下的代码
//start()
....
Topic advisoryTopic = AdvisorySupport.getConsumerAdvisoryTopic((ActiveMQDestination) broadcastTopic);
advisoryConsumer = broadcastSession.createConsumer(advisoryTopic);
advisoryConsumer.setMessageListener(new MessageListener() {
public void onMessage(Message message) {
if (started.get()) {
onAdvisoryMessage(((ActiveMQMessage) message).getDataStructure());
}
}
});
...
...请问：broadcastTopic和advisoryTopic 有什么关系？当有消息发到broadcastTopic对advisoryTopic 有没有影响