Qpid protonj2 is a high-performance, lightweight AMQP protocol library. It can be used in the widest range of messaging applications, including brokers, client libraries, routers, bridges, proxies, and more. This project provides an AMQP protocol engine for building your own AMQP client and servers as well as a full featured imperative API client. If you want to test your AMQP implementation the project also provides an AMQP test framework useful for writing scripted tests of both clients and servers.

Please see http://qpid.apache.org/proton for more information.