[rabbitmq-discuss] Subscription Recovery

Simon MacMullen simon at rabbitmq.com
Wed Jul 11 11:51:16 BST 2012

On 11/07/12 10:50, liny wrote:
> I am newbie to RabbitMQ and have questions.
> Does RabbitMQ have feature like
> http://activemq.apache.org/subscription-recovery-policy.html  ActiveMQ
> subscription-recovery-policy ?
> I need subscription recovery to let new or existed subscriber to get last
> message from publisher, even restart MQ server, but ActiveMQ can't provide
> recover after MQ server is restarted.

There's no exact equivalent of that feature, but other features may give 
you what you want:

Assuming each subscriber needs its own set of messages (i.e. you're not 
round-robinning messages among subscribers) then they should each 
declare their own queue. This queue will still exist when they are 
disconnected, and if durable will exist across broker restarts.

By default messages will back up forever while the subscriber is 
disconnected; the x-message-ttl argument can be used to prevent messages 
above a certain age from being kept.

If you need subscribers to see messages that were sent before they ever 
connected to the broker in the first place, then the LVC plugin may 
help, although it is somewhat limited:


Cheers, Simon

Simon MacMullen
RabbitMQ, VMware

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