YOUnite uses ActiveMQ (AMQ, https://activemq.apache.org ) as its message broker for communication between the YOUnite MDM API service, and the adaptors (Adaptors).
The adaptors, message broker (bus) and the router portion of the YOUnite data hub make up the "Adaptor Layer" of the YOUnite MDM runtime stack which primary task is to synchronize source entities throughout the entire YOUnite ecosystem.
Background
Message Broker and the YOUnite Router
Recipes for Configuring the Message Broker
Configuring Message Broker for YOUnite
Communicating with Message Bus
Message broker configuration for YOUnite Adaptor
Communicating with Message Bus from YOUnite UI