You can also check to see if a queue exists by doing a passive declare. Since your queue is non-durable, if there are no consumers connected to it, it won't exist.<br><br>To answer Simon's question, I do this in order to route requests to a specific machine/consumer cluster by declaring a queue with the name of the machine which is consuming. I check to see if the queue exists first, and if it does, I route the message to that queue (where there may be multiple consumers on it), otherwise I send it to a general queue which is durable. Essentially I'm using it to partition tasks based on their hardware/network needs.<br>
<br>Cheers,<br>-Alex<br><br><div class="gmail_quote">On Mon, Jun 11, 2012 at 5:10 AM, Simon MacMullen <span dir="ltr"><<a href="mailto:simon@rabbitmq.com" target="_blank">simon@rabbitmq.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">On 10/06/12 21:38, Yurisleidy Hernández Moya wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
The Producer can know if there is a Consumer connected to the queue<br>
before sending the message?<br>
</blockquote>
<br></div>
To answer your question literally: yes, use the mgmt HTTP API.<br>
<br>
To answer your question slightly less literally, the point of a messaging system is to let producers and consumers become decoupled - why do you want the producer to know if there is a consumer around?<br>
<br>
Cheers, Simon<span class="HOEnZb"><font color="#888888"><br>
<br>
-- <br>
Simon MacMullen<br>
RabbitMQ, VMware<br>
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