MULTICAST

To enable multicast on a real-time connection to a broker and, if enabled, to specify the precise way in which multicast is used to deliver messages from the broker to a message consumer. The property has no effect on how a message producer sends messages to a broker.

Applicable Objects

ConnectionFactory, TopicConnectionFactory, Topic

JMS administration tool long name: MULTICAST

JMS administration tool short name: MCAST

Programmatic access

Setters/getters

• MQConnectionFactory.setMulticast()
• MQConnectionFactory.getMulticast()

Values

DISABLED

Messages are not delivered to a message consumer using multicast transport. This is the default value for ConnectionFactory and TopicConnectionFactory objects.

ASCF

Messages are delivered to a message consumer according to the multicast setting for the connection factory associated with the message consumer. The multicast setting for the connection factory is noted at the time that the message consumer is created. This value is valid only for Topic objects, and is the default value for Topic objects.

ENABLED

If the topic is configured for multicast in the broker, messages are delivered to a message consumer using multicast transport. A reliable quality of service is used if the topic is configured for reliable multicast.

RELIABLE

If the topic is configured for reliable multicast in the broker, messages are delivered to the message consumer using multicast transport with a reliable quality of service. If the topic is not configured for reliable multicast, we cannot create a message consumer for the topic.

NOTR

If the topic is configured for multicast in the broker, messages are delivered to the message consumer using multicast transport. A reliable quality of service is not used even if the topic is configured for reliable multicast.