<div dir="ltr"><div><div><div><div>Thanks for your reply. <br>For further clarification<br></div>1) what should I use to go through all messages in the queue, <br></div>currently, "./rabbitmqadmin get queue=qname requeue=true" gives only head. does any such interface exists currently to get list of all messages in the queue?<br>
</div>2) Just the re-delivery flag is set, right? so the consume should not assume that it is a retrial of the same message?<br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, May 3, 2013 at 2:21 PM, Emile Joubert <span dir="ltr"><<a href="mailto:emile@rabbitmq.com" target="_blank">emile@rabbitmq.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Hi,<br>
<br>
On 03/05/13 07:35, ashok wrote:<br>
> a) View all messages in the queue (not just head), while not destroying<br>
> order of messages in the queue<br>
<br>
This is possible since v2.7.0:<br>
<a href="http://www.rabbitmq.com/semantics.html#ordering" target="_blank">http://www.rabbitmq.com/semantics.html#ordering</a><br>
You should be aware that the requeueing messages sets the redelivery<br>
flag, so subsequent consumers will not get an identical message.<br>
<br>
> b) To be able to delete a message at a specific position: Currently I can<br>
> delete only head. This does defeat the meaning of queue, though in one of my<br>
> use case, it does seem useful to have such feature.<br>
<br>
This use-case may indicate that you will be better served by a database<br>
than a message broker. Even so it is possible to selectively consume a<br>
message by retrieving messages up to the position of interest. Then<br>
acknowledge the message that you want to remove and requeue all the<br>
messages ahead of it in the queue.<br>
<br>
This is a relatively expensive operation compared to a database delete.<br>
It also assumes that there is only one consumer. If there are multiple<br>
consumers then it will be difficult to remove messages based on position.<br>
<span class="HOEnZb"><font color="#888888"><br>
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-Emile<br>
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</font></span></blockquote></div><br></div>