[rabbitmq-discuss] revoking or removing queued messages

Fri Jun 18 15:43:21 BST 2010

Shane

How does Celery do things like this?  That might be a pattern to
follow even if you don't want to use Celery per se.

alexis

On Thu, Jun 17, 2010 at 8:57 PM, Shane <shane at digitalsanctum.com> wrote:
> Thanks, Scott. Something along the lines of the second approach you
> outlined seems like the way to go.
>
> On Jun 17, 2:04 pm, Scott Brooks <sc... at beamdog.com> wrote:
>> I'm pretty sure there is no way to remove a message(besides a full
>> purge of a queue) since publishing is async so you never really have a
>> way to refer to that message.
>>
>> Some times changes your approach can solve the problem though.
>> I'm not sure what your needs are, but lets assume your are processing
>> PDF files or something like that.
>>
>> One approach would be to send a message containing all the text to be
>> processed as the message, which then the consumer grabs and works
>> with.
>> Another approach would be to send a message saying "document X is
>> ready to be processed", and the consumer then grabshttp://my.pdf.processor.com/documents/X, and does the work.
>>
>> The second approach lets you respond with a "job canceled" message
>> when you request the actual document.
>>
>> Scott
>>
>> On Thu, Jun 17, 2010 at 11:38 AM, Shane <sh... at digitalsanctum.com> wrote:
>> > In our current system, we have a function that essentially revokes a
>> > unit of work before it's acted on. In RabbitMQ, is there a way to
>> > revoke or remove a message from a queue assuming it hasn't been acted
>> > on?
>>
>> > Thanks,
>> > Shane
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