Message broker vs. MOM (Message-Oriented Middleware)

Question

I\'m a little confused as to what the difference is between a message broker e.g. RabbitMQ and Message-orientated Middleware. I can\'t find much info apart from what\'s on Wikip

Answer 1

Message brokers are one (quite popular) kind of MOM. Another kind of MOM would be brokerless MOM, like ZeroMQ. With broker based MOM, all messages go to one central place: broker, and get distributed from there. Broker less MOM usually allows for peer to peer messaging (but does not exclude option of central server as well) .

AMQP is broker based MOM protocol definition (at least all versions prior to 1.0, which drifts into more general MOM), and there are several different Message brokers implementing that protocol, RabbitMQ is just one of them.