Publisher.java

import com.rabbitmq.client.*;

public class Publisher {

    private static final String EXCHANGE_NAME = "topic_test";

    public static void main(String[] argv) throws Exception {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection = factory.newConnection();
        Channel channel = connection.createChannel();

        channel.exchangeDeclare(EXCHANGE_NAME, "topic");

        String routingKey = "foo.bar";
        String message = "TestMsg";
        
        for (int i = 0; i < 1_000; i++) {
            /*Persistent message*/
            channel.basicPublish(EXCHANGE_NAME, routingKey, MessageProperties.PERSISTENT_TEXT_PLAIN, message.getBytes());
            System.out.println(" [x] Sent " + i);
        }
        connection.close();
    }
}