Content-Based Publish/Subscribe

Definition

Content-based publish/subscribe is a communication abstraction that supports selective message dissemination among many sources and many sinks. The publication message content is used to make notification decisions. Subscribers express interest in receiving messages based on specified filter criteria that are evaluated against publication messages. Content-based publish/subscribe is an instance of the publish/subscribe concept.

Key Points

Content-based publish/subscribe is an instance of the publish/subscribe concept. In the content-based model clients interact by publishing messages and subscribing to messages through the publish/subscribe system. The key difference between the content-based and other publish/subscribe models is that the content of publication messages is used as the basis for disseminating publications to subscribers. Subscriptions consist of filters that specify subscriber interests making reference to publication message content. The publish/subscribe...