June 2017
Intermediate to advanced
304 pages
7h 12m
English
Content preview from Distributed Computing in Java 9
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The publish/subscribe messaging paradigm
The publish/subscribe messaging paradigm is built with the concept of a topic, which behaves like an announcement board. Consumers subscribe to receiving messages that belong to a topic, and publishers report messages to a topic. The JMS provider retains the responsibility for distributing the messages that it receives from multiple publishers to many other subscribers based on the topic they subscribe to. A subscriber receives messages that it subscribes to based on the rules it defines and the messages that are published after the subscription is registered; they do not receive any messages that are already published, as shown in the following diagram:
For example, consider there are two publishers: ...
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