Refer to the exhibits.
An Order microservice and a Fulfillment microservice are being designed to communicate with their clients through message-based integration (and NOT through API invocations).
The Order microservice publishes an Order message (a kind of command message) containing the details of an order to be filled. The intent is that Order messages are only consumed by one Mule application: the Fulfillment microservice.
The Fulfillment microservice consumes Order messages, fills the orders described therein, and then publishes a Fulfillment message (a kind of event message). Each Fulfillment message can be consumed by any interested Mule application, and the Order microservice is one such Mule application.
What is the recommended choice of message broker(s) and message destination(s) in this scenario?