unable to make activemq consumer to deque - spring-boot

Question

I am creating a JMS chat application using activemq and spring boot. I am trying to send message from producer to multiple subscribers. I am able to send message i.e message is en-queued. but in my receiver part message is unable to de-queue.` I am using the below code for communicating message from producer to multiple subscribers.
public class WelcomeController implements MessageListener {
public static Boolean TRANSACTIONAL = false;
public static String TOPIC_NAME = "firstTopic";
public static String BROKER_URL = "tcp://localhost:61616";
public static String BROKER_USERNAME = "admin";
public static String BROKER_PASSWORD = "admin";
public void createProducer() throws JMSException {
Connection connection = null;
Session session = null;
try {
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory();
connectionFactory.setBrokerURL(BROKER_URL);
connectionFactory.setPassword(BROKER_USERNAME);
connectionFactory.setUserName(BROKER_PASSWORD);
connection = connectionFactory.createConnection();
connection.setClientID("CircliTopic");
connection.start();
session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
for (int i = 1; i <= 3; i++) {
session = connection.createSession(TRANSACTIONAL,
Session.AUTO_ACKNOWLEDGE);
Topic destination = session.createTopic(TOPIC_NAME);
MessageProducer producer = session.createProducer(destination);
TextMessage message = session.createTextMessage();
message.setText( "My text message was send and received");//
System.out.println("Sending text '" + message + "'");
producer.send(message);
MessageConsumer consumer = session
.createDurableSubscriber(destination, "Listener" + i);
consumer.setMessageListener(new WelcomeController());
}
} finally {
connection.close();
}`
}
#Override
public void onMessage(Message message) {
try {
if (message instanceof TextMessage) {
TextMessage text = (TextMessage) message;
System.out.println(" - Consuming text msg: " + text.getText());
} else if (message instanceof ObjectMessage) {
ObjectMessage objmsg = (ObjectMessage) message;
Object obj = objmsg.getObject();
System.out.println(" - Consuming object msg: " + obj);
} else {
System.out.println(
" - Unrecognized Message type " + message.getClass());
}
} catch (JMSException e) {
e.printStackTrace();
}
}
I am able to get consuming text message in my console but my message is not de-queued to the subscribers and also in my activemq server message is not dequeued.

Answer 1

You are creating a Topic subscription only after the message has been sent and that won't work because these are Topics and a Topic with no subscriptions simply discards all messages sent to it. You need to establish a durable Topic subscription prior to any messages being sent, or switch to Queues if your design allows as a Queue will store a message sent to it until consumed.
It is hard to say more without knowing your requirements but it seems you need to spend a little bit more time understanding how Topics work.