org.apache.activemq.examples.broker:topic-hierarchies (maven):  The Apache Software Foundation provides support for the Apache community of open-source software projects. The Apache projects are characterized by a collaborative, consensus based development process, an open and pragmatic software license, and a desire to create high quality software that leads the way in its field. We consider ourselves not simply a group of projects sharing a server, but rather a community of developers and users. 
Keywords: activemq|activemq-artemis|amqp|amqp10|amqps|apache|broker|hornetq|java|jms|messaging|mqtt|openwire|stomp