[rabbitmq-discuss] How do I inspect the queue

[Reddy, Rajesh (GPT EMEA)]

Hi Tony,

It could be a connection thing as it happened only in debug, but when I
checked the connections in server it was fine. So this is a strange
behaviour. Let me see if this happens in release mode.

Also, iam declaring a queue as follows,
Passive = false
Durable = false
Exclusive = true
Autodelete = true
Nowait = true

This would create a non durable and auto delete queue. I can inspect
using rabbitmqctl list_queues, but it only gives me durable and
autodelete and not the other items related to declare queue.
Also, what is exclusive used for.

So there is no way I can find out if my queue is deleted.

I my case the client creates queue just once and then waits on a
callback for any messages on that queue. So if a queue is deleted then
the client will be just sitting there waiting for a message without
knowing that the queue no longer exists.

Thanks
Rajesh

-----Original Message-----
From: Tony Garnock-Jones [mailto:tonyg at lshift.net] 
Sent: 05 May 2009 17:12
To: Reddy, Rajesh (GPT EMEA)
Cc: rabbitmq-discuss at lists.rabbitmq.com
Subject: Re: [rabbitmq-discuss] How do I inspect the queue


Reddy, Rajesh (GPT EMEA) wrote:
> As I was debugging some issue the queue was deleted even though the
> connection is still active and I was no longer receiving any call
back(
> as the queue no longer exists).

Could it be that the pauses caused by the debugger in turn caused the
heartbeat mechanism to fire, terminating the connection at the
server-side?

> Also, regarding the Queue inspection . I meant how do I check in my
> client if the queue exists.

You can do a passive declare; though this will cause the channel to
close if the queue does not exist. Alternatively, you may not need to
check: queue.declare is idempotent, and you can simply issue the
queue.declare again if you are in doubt.

Regards,
  Tony
-- 
 [][][] Tony Garnock-Jones     | Mob: +44 (0)7905 974 211
   [][] LShift Ltd             | Tel: +44 (0)20 7729 7060
 []  [] http://www.lshift.net/ | Email: tonyg at lshift.net

--------------------------------------------------------------------------
This message w/attachments (message) may be privileged, confidential or proprietary, and if you are not an intended recipient, please notify the sender, do not use or share it and delete it. Unless specifically indicated, this message is not an offer to sell or a solicitation of any investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Merrill Lynch. Subject to applicable law, Merrill Lynch may monitor, review and retain e-communications (EC) traveling through its networks/systems. The laws of the country of each sender/recipient may impact the handling of EC, and EC may be archived, supervised and produced in countries other than the country in which you are located. This message cannot be guaranteed to be secure or error-free. References to "Merrill Lynch" are references to any company in the Merrill Lynch & Co., Inc. group of companies, which are wholly-owned by Bank of America Corporation. Securities and Insurance Products: * Are Not FDIC Insured * Are Not Bank Guaranteed * May Lose Value * Are Not a Bank Deposit * Are Not a Condition to Any Banking Service or Activity * Are Not Insured by Any Federal Government Agency. Attachments that are part of this E-communication may have additional important disclosures and disclaimers, which you should read. This message is subject to terms available at the following link: http://www.ml.com/e-communications_terms/. By messaging with Merrill Lynch you consent to the foregoing.
--------------------------------------------------------------------------