Session sess = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageConsumer cons = sess.createConsumer(topic, "name = 'Watt'");
//MessageConsumer cons = sess.createConsumer(topic);
MessageProducer prod = sess.createProducer(topic);
relayers[i] = new Relayer(prod);
cons.setMessageListener(relayers[i]);
}