How can I create Progress for Springboot + Rabbit MQ?

Question

I have tried creating progress with updating field as counter in database, but I have trouble since I use two and more machine with parallel process. That make database not counting in right direction. How can create right counter for every data in Queue has been process.

Answer 1

Have a look at RabbitMQ - Get total count of messages enqueued

This describes how you get the number of messages in the queue. With that number you should be able to calculate a progress (if you know how much entries were added to the queue in the first place)

private final static String QUEUE_NAME = "hello";

public static void main(String[] argv) throws java.io.IOException, InterruptedException, TimeoutException, KeyManagementException, NoSuchAlgorithmException {
    ConnectionFactory factory = new ConnectionFactory();
    factory.setHost("localhost");
    factory.setPort(5672);

    factory.setUsername("guest");
    factory.setPassword("guest");

    Connection connection = factory.newConnection();
    Channel channel = connection.createChannel();

    AMQP.Queue.DeclareOk declareOk = channel.queueDeclare(QUEUE_NAME, false, false, false, null);
    System.out.println(declareOk);

    channel.basicPublish("", QUEUE_NAME, null, "Hello, world!".getBytes());

    declareOk = channel.queueDeclare(QUEUE_NAME, false, false, false, null);
    System.out.println(declareOk);

    System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
}

The output is:

#method<queue.declare-ok>(queue=hello, message-count=1, consumer-count=0)
#method<queue.declare-ok>(queue=hello, message-count=2, consumer-count=0)
[*] Waiting for messages. To exit press CTRL+C

I'm using RabbitMq 3.6.9 and as you see, this works fine.