54.1. Overview and Related Methods and Interfaces
A client uses a TopicSubscriber object to receive messages that have been published to a topic. A TopicSubscriber object is the publish/subscribe form of a message consumer.
A TopicSession allows the creation of multiple TopicSubscriber objects per topic. It will deliver each message for a topic to each subscriber eligible to receive it. Each copy of the message is treated as a completely separate message. Work done on one copy has no effect on the others; acknowledging one does not acknowledge the others; one message may be delivered immediately, while another waits for its subscriber to process messages ahead of it.
Regular TopicSubscriber objects are not durable. They receive only messages ...
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