The 0-8 and 0-9-1 AMQP specifications do not define an Message class or interface. Instead, when performing an
operation such as basicPublish the content is passed as a byte-array argument and additional properties are passed in
as separate arguments. Spring AMQP defines a Message class as part of a more general AMQP domain model
representation. The purpose of the Message class is to simply encapsulate the body and properties within a single
instance so that the rest of the AMQP API can in turn be simpler.
Mark Pollack, Mark Fisher, Oleg Zhurakousky, Dave Syer, Gary Russell