Вывод сообщения о том, что очередь не принимает сообщения

lab3/producer/app/src/main/java/dev/tishenko/producer/Send.java

@@ -20,12 +20,17 @@ public class Send {
         try (Connection connection = factory.newConnection();
                 Channel channel = connection.createChannel()) {
             channel.queueDeclarePassive(QUEUE_NAME);
+            channel.confirmSelect();
 
             int count = 0;
             while (true) {
                 String message = "Message from " + name + " #" + count++;
                 channel.basicPublish("", QUEUE_NAME, null, message.getBytes());
-                System.out.println(" [x] Sent '" + message + "'");
+                if (!channel.waitForConfirms()) {
+                    System.out.println(" [!] Message was NOT confirmed!");
+                } else {
+                    System.out.println(" [x] Sent '" + message + "'");
+                }
                 Thread.sleep(delay);
             }
         }