Python 获取RabbitMQ队列中的消息数
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Getting number of messages in a RabbitMQ queue
提问by Basic
We're using amqplibto publish/consume messages. I want to be able to read the number of messages on a queue (ideally both acknowledged and unacknowledged). This will allow me to show a nice status diagram to the admin users and detect if a certain component is not keeping up with the load.
我们使用amqplib来发布/使用消息。我希望能够读取队列中的消息数量（理想情况下既已确认又未确认）。这将允许我向管理员用户显示一个很好的状态图，并检测某个组件是否跟不上负载。
I can't find any information in the amqplib docs about reading queue status.
我在 amqplib 文档中找不到关于读取队列状态的任何信息。
Can someone point me in the right direction?
有人可以指出我正确的方向吗？
采纳答案by ChillarAnand
Using pika:
使用鼠兔：
import pika
pika_conn_params = pika.ConnectionParameters(
host='localhost', port=5672,
credentials=pika.credentials.PlainCredentials('guest', 'guest'),
)
connection = pika.BlockingConnection(pika_conn_params)
channel = connection.channel()
queue = channel.queue_declare(
queue="your_queue", durable=True,
exclusive=False, auto_delete=False
)
print(queue.method.message_count)
Using PyRabbit:
使用 PyRabbit：
from pyrabbit.api import Client
cl = Client('localhost:55672', 'guest', 'guest')
cl.get_messages('example_vhost', 'example_queue')[0]['message_count']
Using HTTP
使用 HTTP
Syntax:
句法：
curl -i -u user:password http://localhost:15672/api/queues/vhost/queue
Example:
例子：
curl -i -u guest:guest http://localhost:15672/api/queues/%2f/celery
Note: Default vhost is /which needs to be escaped as %2f
注意：默认 vhost/需要转义为%2f
Using CLI:
使用命令行：
$ sudo rabbitmqctl list_queues | grep 'my_queue'
回答by mguillermin
Using the Java API, you can do the following :
使用 Java API，您可以执行以下操作：
channel.queueDeclarePassive(queueName).getMessageCount()
I believe this is also available with amqplib (according to https://code.google.com/p/py-amqplib/source/browse/amqplib/client_0_8/channel.py#1356it seems that queue_declare()returns a tuple with the message count)
我相信这也适用于 amqplib（根据https://code.google.com/p/py-amqplib/source/browse/amqplib/client_0_8/channel.py#1356似乎queue_declare()返回一个带有消息计数的元组)
If you need more precise metrics (especially nack message count), you need to use rabbitmqctl or rabbitmq_management. Rabbitmq_management is probably a good choice due to its HTTP API. More info : http://www.rabbitmq.com/management.html
如果您需要更精确的指标（尤其是 nack 消息计数），则需要使用 rabbitmqctl 或 rabbitmq_management。由于其 HTTP API，Rabbitmq_management 可能是一个不错的选择。更多信息：http: //www.rabbitmq.com/management.html
回答by OhadBasan
following the answer of ChillarAnand you can get the value easily. the data is in the object.
按照 ChillarAnand 的回答，您可以轻松获得价值。数据在对象中。
import pika
connection = pika.BlockingConnection(pika.ConnectionParameters(
host='localhost',
port=5672,
credentials=pika.credentials.PlainCredentials('guest', 'guest'),
)
channel = connection.channel()
print(channel.queue_declare(queue="your_queue", durable=True, exclusive=False,
auto_delete=False).method.message_count)
and you will get the exact message number
你会得到确切的消息编号
