Check RabbitMQ queue size from client

Question

Does anyone know if there\'s a way to check the number of messages in a RabbitMQ queue from a client application?

I\'m using the .NET client library.

Answer 1

Update: it appears that the pika implementation of queue_declare(..) has changed since mmalone's very helpful post.

In python/pika (v0.9.5) it's still possible to check the queue depth via pika, but it requires a slightly more indirect approach.

queue_declare(...) passes a method object into its callback function, which you can then inspect. For example, to check the number of messages and consumers in the queue named 'myQueue':

def cbInspect(qb):
    messagesInQueue = qb.method.message_count
    print "There are %d messages in myQueue" % messagesInQueue

    consumersInQueue = qb.method.consumer_count
    print "There are %d consumers in myQueue" % consumersInQueue

    return

myChannel = channel.queue_declare(callback=cbInspect, queue='myQueue', passive=True)

Hope this helps, and please go easy on me, I'm new around here :-)

Answer 2

my little snippet based on Myydrralls' answer. I think if he had code in his answer I might have noticed it much quicker.

public uint GetMessageCount(string queueName)
{
    using (IConnection connection = factory.CreateConnection())
    using (IModel channel = connection.CreateModel())
    {
        return channel.MessageCount(queueName);
    }
}

Answer 3

I am 2 years too late but I was searching for it myself and found that rabbitmq gives u simple script to communicate to erlang nodes..its in sbin folder where the starting script for RabbitMQ is located..so you can basically say

./rabbitmqctl list_queues

this will display the queues along with the count of messages pending to those queues similarly you can also say

./rabbitmqctl list_channels
./rabbitmqctl list_connections

etc. For more info you can visit here

Answer 4

At least as of RabbitMQ 3.3.5, you can do this in a C# program without any RabbitMQ client library by calling the RabbitMQ Management HTTP API:

// The last segment of the URL is the RabbitMQ "virtual host name". 
// The default virtual host name is "/", represented urlEncoded by "%2F".
string queuesUrl = "http://MY_RABBITMQ_SERVER:15672/api/queues/%2F";

WebClient webClient = new WebClient { Credentials = new NetworkCredential("MY_RABBITMQ_USERNAME", "MY_RABBITMQ_PASSWORD") };
string response = webClient.DownloadString(queuesUrl);

The username and password are the same as those you use to log into the RabbitMQ management console UI.

Response will be a JSON string with the list of queues, including their message counts, among other properties. (If you like, you can deserialize that JSON into a C# object using a library like Json.NET.)

The API documentation is installed along with the RabbitMQ management console and should be available on that server at http://MY_RABBITMQ_SERVER:15672/api .

Answer 5

I'm using version 3.3.1 of the .NET client library.

I use the following, which is very similar to Ralph Willgoss's second suggestion, but you can supply the queue name as an argument.

QueueDeclareOk result = channel.QueueDeclarePassive(queueName);
uint count = result != null ? result.MessageCount : 0;

Answer 6

I was able to get the size/depth of queue from python program. 1. using py_rabbit

    from pyrabbit.api import Client
    cl = Client('10.111.123.54:15672', 'userid', 'password',5)
    depth = cl.get_queue_depth('vhost', 'queue_name')

2. kombu [a python package usually comes with celery installation]

conn = kombu.Connection('amqp://userid:password@10.111.123.54:5672/vhost')
conn.connect()
client = conn.get_manager()
queues = client.get_queues('vhost')
for queue in queues:
    if queue == queue_name:
    print("tasks waiting in queue:"+str(queue.get("messages_ready")))
    print("tasks currently running:"+str(queue.get("messages_unacknowledged")))

the ip address is just an example.