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From Dejan Bosanac <dejan.bosa...@ttmsolutions.com>
Subject Re: Reverse queue walking
Date Wed, 08 Oct 2008 07:27:41 GMT
Hi,

take a look at the following article

http://activemq.apache.org/how-can-i-support-priority-queues.html

Cheers

-- 
Dejan Bosanac


http://www.ttmsolutions.com - get a free ActiveMQ user guide

ActiveMQ in Action - http://www.manning.com/snyder/
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Vadim Chekan wrote:
> Hi All,
> If I want to receive the queue in reverse order, does it mean that
> I've designed something wrong? :)
>
> I have a transaction in my application which consist of up to 100K
> little actions. I want to implement rollback functionality. My initial
> idea was to create a queue where I send a "compensating transaction"
> for each action which has been successfully executed. In case of
> rollback event I would execute actions from this rollback queue.
> But the problem is that I need to execute actions in reverse order.
> Action which has been executed last must be undone first.
>
> It seems I'll have to store my actions in DB and in case of rollback
> I'll generate appropriate compensating transactions.
> I'm just curious if there are any known design patterns for this problem.
>
>   



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