The subtopic capability lets you divide the messages that a producers send to a destination into specific categories at the destination. You can configure a Consumer component that subscribes to the destination to receive only messages sent to a specific subtopic or set of subtopics. Use wildcard characters (*) to send or receive messages from more than one subtopic.

In the subtopic property of a Producer component specify the subtopics that the component sends messages to.

var message:AsyncMessage = new AsyncMessage();
producer.subtopic = "chat.john";
producer.destination="ChatTopic"
// Generate message.
producer.send(message);

In the subtopic property of a Consumer component specify the subtopic to which the Consumer is subscribed.

consumer.destination = "ChatTopic";
consumer.subtopic = "chat.john";
consumer.subscribe();

To allow subtopics for a destination set the allow-subtopics element to true in the destination definition in the configuration file. Please note that only subtopic separator currently accepted is "." (period).

<destination id="ChatTopic">
  <properties>
    <network>
      <subscription-timeout-minutes>0</subscription-timeout-minutes>
    </network>
    <server>
      <allow-subtopics>true</allow-subtopics>
    </server>
  </properties>
  <channels>
    <channel ref="my-rtmp"/>
  </channels>
</destination>