What messaging topologies are supported by AMQP and Qpid?
AMQP provides the ability to do Point-to-Point, Peer-to-Peer, Pub-Sub, and Eventing. This allows many patterns to be craeted: Point-to-point This is one of the simplest use-cases. AMQP allows for this in a few ways. a.) A client can create a named queue allowing the producer to publish the message to the direct exchange with the key mapping the queue name. This will route the message to that queue. b.) The above pattern can be extended by specifying a reply-to address in the published messages allowing for the consumer to reply the producer without knowing who it was send from prior to receiving the message. One-to-many There are a few patterns that can be used. a.) AMQP provides a ‘fanout’ exchange which will send a message to all the queues that have been bound to it. Different domains or topics are created with the ‘fanout’ exchange by declaring different named fan-out exchanges. b.) A ‘topic’ or ‘headers’ exchange can also be used. in this case the pattern match is used to send the
