[rabbitmq-discuss] Number of messages in a queue

[Sharath]

I am implementing a system where jobs are submitted to the RabbitMQ based 
'work queue' and the workers pick the jobs. 

However when the number of jobs in the queue are more than a certain 
number, I want to stop accepting any job submissions. I was wondering if 
there is any way using which we can get the number of messages/jobs in the 
queue and could you let me know the complexity of that call.

One idea is to using queue declare with passive as true, but I am not sure 
if this is the most optimal way to do it.

-Sharath
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