[rabbitmq-discuss] time to live on a durable message

Wed Oct 16 08:53:56 BST 2013

Oops - sorry I didn't see your reply before posting Michael. Silly mail app didn't refresh properly.

On 15 Oct 2013, at 19:13, Michael Klishin <mklishin at gopivotal.com> wrote:

> On 15 Oct 2013, at 21:58, "PATAR, SAGAR" <sp345s at att.com> wrote:
> 
>> Is there a way we can define time to live on a message published to a durable exchange ..
> 
> Yes, and, in fact, on any message. See Per-Message TTL on
> https://www.rabbitmq.com/ttl.html
> 
>> 
>> What happens when a message binding key doesn’t matches any binding ..
> 
> 
>> does it stay in the durable exchange till the time to live is expired ..
> 
> Messages are not stored in exchanges. Exchanges act as routing tables that move messages
> to one or more queues. If TTL has expired, a message is deleted from the queue.
> 
>> 
>> Scenario 1:
>> Let’s say we have a time to live of 2 hr for a message and its published to a durable exchange with no binding Key match (ex: binding key = NoMatch) … after 1 hr let’s say a  client subscribes for messages with bindingKey =”NoMatch” on that exchange .. will the message be delivered to the client ?? 
> 
> If the message was routed to a queue with TTL = 2h and consumer comes around in 1h, then it will be delivered.
> 
> 
>> Scenario 2:
>> Let’s say we have a time to live of 2 hr for a message and its published to a durable exchange with a binding key match (ex: binding key = match)  and the message will be routed to a queue and is consumed by a client .. After 1 hr If a new client subscribes for the messages with bindingKey =”match” by creating a new Queue ..will the new client get the  same message
> 
> No, standard exchanges do not keep a history of messages, so newly bound queues only get messages
> published after the binding is set up.
> 
> 
> MK
> 
> 
> 
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