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Figure 5-2. Messaging with topics and queues
Queue: A distribution mechanism for delivering messages to a
single consumer. Any number of clients (publishers) can publish
messages to a queue, but every message is consumed by one and
only one client (consumer).
Topic: A distribution mechanism for delivering messages
to multiple consumers. Any number of clients (publishers)
can publish messages to a topic, and any number of clients
(consumers) can consume them.
not every message broker uses topics and queues. in this chapter, though, we use
Apache ActiveMQ, which does support topics and queues.
Note
 
 
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