I'm confused—I thought this was the mailing list…
That said, if there's a more appropriate place to ask this question, I'm
happy to move there.
On Thursday, September 10, 2015 at 11:20:27 PM UTC-4, Michael Klishin wrote:
>
> Questions belong to the mailing list.
>
> On 11/9/2015, at 6:17, jo...@signafire.com <javascript:> wrote:
>
> Essentially, it's not clear to me how an application is supposed to
> recover when handling a nack or when langohr.confirm/wait-for-confirms
> returns false. It seems to me that the delivery tag that the nack handler
> receives is only useful if I've been maintaining a map from delivery tags
> to messages (so that I know which message needs to be retried). Is that a
> responsibility expected of the application developer? I.e., should I be
> doing something like (swap! delivery-tag->message assoc
> (.getNextPublishSeqNo channel) message) before each invocation of
> langohr.basic/publish? (If so, I'd probably also (swap!
> delivery-tag->message dissoc delivery-tag) inside of the ack-handler.)
>
> And in the case of langohr.confirm/wait-for-confirms returning false: all
> I know in that circumstance is that *some* message failed to send since
> the last time I called wait-for-confirms. So in order to use
> wait-for-confirms, should I be maintaining a set of pending messages?
> Something along the lines of:
> (if (wait-for-confirms channel)
> (reset! sent-yet-unconfirmed-messages #{}) ; flush our memory of the
> recently-sent messages
> (try-resending-the-messages))
>
>
> I'd really appreciate any guidance you can provide.
> -Josh Tilles
>
> P.S. I'm new to AMQP, RabbitMQ, and Langohr, so if I'm going about this
> the wrong way, feel free to point it out.
>
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