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From andi welchlin <andi.welch...@gmail.com>
Subject Re: Bidirectional route combined with binding to queue
Date Mon, 22 Jan 2018 15:05:05 GMT
Hello Gordon,

thank you for your answer.

I forgot to mention that messages need to be anonymous in my environment,
as well :-)

Qpid.trace.id would be found in the message header, I think. So this would
break anonymity.

Any ideas?

Kind Regards,
Andreas



On Mon, Jan 22, 2018 at 3:13 PM, Gordon Sim <gsim@redhat.com> wrote:

> On 22/01/18 13:24, andi welchlin wrote:
>
>> Hello all,
>>
>> I want to share an exchange between two brokers (bidirectional).
>>
>> I understood that the right way to do this is using a dynamic route like:
>>
>> qpid-route dynamic add $broker1 $broker2 $exchange_name
>> qpid-route dynamic add $broker2 $broker1 $exchange_name
>>
>>
>> I also want to achieve that no messages will be lost when one of the
>> two brokers is down while messages are sent to the other broker.
>>
>> So I would bind a queue ($queue_out) to $exchange_name on both brokers.
>> Then I would route on each broker $queue_out to the exchange of the remote
>> broker.
>>
>> As far as I understood a dynamic route is then not possible any more.
>>
>> It would look like:
>>
>> # install binding from exchange to output queue
>> qpid-config -b $BROKER1 bind $exchange_name $queue_out
>> qpid-config -b $BROKER2 bind $exchange_name $queue_out
>>
>> # install route
>> qpid-route -d queue add $BROKER2 $BROKER1 $exchange_name $queue_out
>> qpid-route -d queue add $BROKER1 $BROKER2 $exchange_name $queue_out
>> qpid-route route map $BROKER2
>>
>>
>> But this seems to lead to circular messages.
>>
>> Does anyone have a solution for this scenario?
>>
>
> You can use the "qpid.trace.id" and "qpid.trace.exclude" queue options
> for this.
>
> For each of the two forwarding queues, set the id to the name of the
> broker the queue is on and set the excludes to a list containing the other
> brokers id.
>
> That way messages from the other broker are not enqueued on the forwarding
> queue, so will not get forwarded back.
>
>
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