[openamq-dev] mandatory routing and immediate delivery

[R Hayes]

What does immediately mean?  The queue is empty?  The item is  
retrieved from the queue within a small time period?

-rhayes

On Oct 19, 2007, at 10:17 AM, Pieter Hintjens wrote:

> On 10/19/07, Malinga <malingajava at yahoo.com> wrote:
>
>>     Can i know the whats mandatory routing and immediate delivery  
>> does
>> exactly in amq_client_session_basic_publish method. In your
>> documentation theres no clear description for this.
>
> Both flags will cause undeliverable messages to be returned in certain
> cases.  The returned messages arrive like delivered messages
> (asynchronously) on the session->returned_basic_list, just as
> delivered messages arrive on the session->delivered_basic_list.
>
> The mandatory flag means, "return the message if it cannot be routed
> by the exchange", and the immediate flag means, "return the message if
> it cannot be delivered by the queue right away".
>
> In a typical service-oriented model, each service is a queue bound to
> an exchange like amq.direct.  The mandatory flag says, "return the
> message if no service is active" and the immediate flag says, "return
> the message if the service is busy".
>
> We return the whole message, rather than just headers, so that the
> application can process it without any other context.
>
> Hope this helps.
>
> -Pieter
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