[rabbitmq-discuss] Questions on how to handle message reliability.

Fri May 9 23:12:38 BST 2014

Thank you for the reply. 

I am using java client and I was browsing the api but still not clear on how to check the redelivery flag in the consumer. Do I check something in delivery.getProperties()?

I am unable to open the link you provided for the nacks, any chance you have a updated link?

Thanks.

On Friday, May 9, 2014 2:24 PM, Michael Klishin <mklishin at gopivotal.com> wrote:

On May 9, 2014 at 2:44:06 PM, Neha Kansal (kansalneha28 at yahoo.com) wrote:
> > - If I use publisher confirms and waitForConfirms, would the  
> broker hold off on delivering the message to the consumer until  
> ack has been sent to the publisher?

No, consumers are not aware of publisher confirms, and vice versa.

> - If a publisher receives a nack (i.e. waitForConfirms returns  
> a false), the publisher code has to handle retry publishing by  
> itself as many times as it want to in a loop or is there any config/setup  
> in RabbitMQ that helps with republishing?

You have to handle nacks on your own. Note that it’s actually tricky to
trigger a nack:

http://markmail.org/thread/26va4wjuqbae5efi 

> - How do I check the redelivery flag in the consumer code?

See message properties. Exactly how depend on the client you use.
--  
MK  

Software Engineer, Pivotal/RabbitMQ
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