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Messaging and ESB
Introduction to messaging : Publish-and-Subscribe messaging : Pub/Sub messaging options and features

Pub/Sub messaging options and features

The following table describes the features of the Pub/Sub messaging model.
Table 5. Pub/Sub messaging features
Topic hierarchy
Topics can be organized into hierarchies
Guaranteed message delivery
A topic subscription can be durable; message remains when subscriber disconnects
Request and reply
Ensures the subscribers send a message back to the publisher when a message is received
Message selector
Filters the messages received from a topic
For more information, see Using PUB/SUB messaging.