new Connect("tcp://127.0.0.1:1233"),
new Listener(listener), new Subscribe("foo.bar"));
//#sub-topic-socket
//#unsub-topic-socket
subTopicSocket.tell(new Unsubscribe("foo.bar"), ActorRef.noSender());
//#unsub-topic-socket
byte[] payload = new byte[0];
//#pub-topic
pubSocket.tell(ZMQMessage.withFrames(ByteString.fromString("foo.bar"),