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Message-Id: <D0558324-C0D9-40B9-88FD-DFD8173F3002@gmail.com>
From: Rob Davies <rajdavies@gmail.com>
To: users@activemq.apache.org
In-Reply-To: <19088116.post@talk.nabble.com>
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Subject: Re: LIFO (not FIFO) queues
Date: Thu, 21 Aug 2008 22:34:29 +0100
References: <19088116.post@talk.nabble.com>


On 21 Aug 2008, at 13:52, Artur Siekielski wrote:

>
> Hi.
> Is it possible to change JMS queues semantics to Last In, First Out  
> (ie.
> stack)? Would it be difficult to patch ActiveMQ sources to achieve  
> this?
>
> Another solution to our problem is using priority queues. But ActiveMQ
> doesn't support priorities. Only Oracle's AQs support this...
>
> A bigger picture: we are using JMS for grid computations, task have  
> subtasks
> and subtasks have to be computed first. It would be nice to have a  
> general
> solution for this using JMS.
> -- 
> View this message in context: http://www.nabble.com/LIFO-%28not-FIFO%29-queues-tp19088116p19088116.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>

Nice idea! Priorities for messages on Queues are really hard to  
implement - but a potential option would be to have different priority  
Queues - that level of granularity is a lot easier - I'll investigate  
it.

The LIFO  does seem a little wacky  though.


cheers,

Rob

Rob Davies
http://rajdavies.blogspot.com/