Ok... so a consumer application might set up one or more durable queues, and<br>also a durable exchange that routes messages to those queues. A producer<br>can be "dumb", and simply send a message to that exchange, and be ignorant<br>
of who receives it.<br><br>That makes sense.<br><br>Thanks,<br><br>- Jim<br><br clear="all">Jim Irrer <a href="mailto:irrer@umich.edu">irrer@umich.edu</a> (734) 647-4409<br>University of Michigan Hospital Radiation Oncology<br>
519 W. William St. Ann Arbor, MI 48103<br>
<br><br><div class="gmail_quote">On Wed, Aug 12, 2009 at 12:03 PM, Alexis Richardson <span dir="ltr"><<a href="mailto:alexis.richardson@gmail.com">alexis.richardson@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Jim,<br>
<br>
Exchanges contain routing information which you may not want to lose<br>
in a crash. Queues contain messages, for eventual delivery.<br>
Persistent messages plus durable queues gives you eventual delivery<br>
even if the queue crashes. But you also want durable exchanges if you<br>
plan to send more messages down the same path even after a crash.<br>
<br>
Does this help?<br>
<br>
alexis<br>
<div><div></div><div class="h5"><br>
<br>
On Wed, Aug 12, 2009 at 4:59 PM, Jim Irrer<<a href="mailto:irrer@umich.edu">irrer@umich.edu</a>> wrote:<br>
> I am creating a strategy for using AMQP in our organization<br>
> and am trying to understand the technology. One thing that<br>
> confuses me is the idea of making a durable exchange. Durable<br>
> queues make sense, but is there a real world scenario that<br>
> benefits from a durable exchange?<br>
><br>
> Thanks,<br>
><br>
> - Jim<br>
><br>
> Jim Irrer <a href="mailto:irrer@umich.edu">irrer@umich.edu</a> (734) 647-4409<br>
> University of Michigan Hospital Radiation Oncology<br>
> 519 W. William St. Ann Arbor, MI 48103<br>
><br>
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