[rabbitmq-discuss] exchange.bind details

Tue Apr 17 12:31:29 BST 2012

Hi Alex,

The messages will be deleted according to an internal logic... not directly upon consumption.  There is no problem using a noack to keep the messages available for another connection on the Q, but, the question is "how to concurently deliver messages to all instances of the same user".

Imagine this scenario:

I am connected to a Q on my computer.  I leave the office and connect to the same Q with my phone.  My phone will never receive messages as long as my computer is connected to the Q.

To get around this problem I intend to use exchange.bind (in place of the named Q) but cannot find much info on it's implementation...  Can you point me to some material on exchange.bind?

thanks,
Matthew

-----Original Message-----
From: "Alexis Richardson" <alexis at rabbitmq.com>
Sent: Tuesday, April 17, 2012 2:37am
To: m.luchak at smartasking.com
Cc: rabbitmq-discuss at lists.rabbitmq.com
Subject: Re: [rabbitmq-discuss] exchange.bind details

Matthew

When do messages get dropped or deleted?  I.e. do you want a copy of
every message to get delivered to every device?

If a user reads a message on their phone, can they read it again later
on another device?

alexis

On Tue, Apr 17, 2012 at 1:40 AM,  <m.luchak at smartasking.com> wrote:
> Thanks for the help Alexis but the scenario is a little more complicated...
> I think exchange binding is the only way to go... but I'm open for
> suggestions ;)
>
>
>
> Users are able to log-on to the system using more than one device at the
> same time (mobile, web, desktop) and it is a requirement that messages are
> delivered to each of these devices even if they are all logged on at the
> same time. Sooo... I am looking at exchange binding like:
>
>
>
> P -> Topic Exchange <------------User1Exchange
>
> |_________temporary Q mobile
>
> |________temporary Q web
>
> |_________temporary Q desktop
>
>
>
>
>
> Functional Requirements:
>
> Topic exchanges
>
> Messages published to exchange while user offline are available when user
> logs-on
>
> One "permanent address" per user (thought of queue - looks like I need
> exchange)
>
> multiple instances of the same user logged-on concurrently
>
>
>
>
>
>
> -----Original Message-----
> From: "Alexis Richardson" <alexis at rabbitmq.com>
> Sent: Monday, April 16, 2012 6:33pm
> To: m.luchak at smartasking.com
> Cc: rabbitmq-discuss at lists.rabbitmq.com
> Subject: Re: [rabbitmq-discuss] exchange.bind details
>
> Matthew
>
> Have you tried using direct exchanges?
> http://www.rabbitmq.com/tutorials/tutorial-three-python.html
>
> alexis
>
>
> On Mon, Apr 16, 2012 at 11:24 PM, <m.luchak at smartasking.com> wrote:
>> Hi all,
>>
>>
>>
>> Thanks for the help with the STOMP question. I am having difficulties
>> understanding the exchange.bind constructor (ticket, destination,
>> source).... Could someone please point me to resources?
>>
>>
>>
>> I am trying to implement "exchange.bind"
>>  (http://www.rabbitmq.com/blog/2010/10/19/exchange-to-exchange-bindings/)
>> to
>> allow multiple instances of the same user presence (android, web, desktop)
>> to receive notifications.
>>
>>
>>
>> Under the exchange->Q model if all three devices are logged in
>> concurrently
>> there is no way for all instances to receive messages as they will all be
>> logged in on the same Q.
>>
>>
>>
>> thanks,
>>
>> Matthew
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> rabbitmq-discuss mailing list
>> rabbitmq-discuss at lists.rabbitmq.com
>> https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
>>
>
>
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