Can I modify msgs in the queue?

[Lucas Blue <lu...@yahoo.com>]

Hi.  Suppose I want to modify a Message, once it is already in the queue,
without removing it.  (Perhaps I want to change an int property that was set
on it initially, or perhaps I want to modify the msg itself.)   Is this
possible?  Is there any 'update message' support in ActiveMQ?  If not,
perhaps I could hit the underlying jdbc-based persistence and perform
updates on the appropriate table(s)?  

What I'm trying to do is gradually increase the priority of messages that
are sitting in the queue: the longer they've been waiting, the higher the
priority.  This is a basic 'aging' algorithm.   

I know I can browse all elements using a QueueBrowser, but I see no way to
update those elements. Any ideas? 

Thanks,
Lucas
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Re: Can I modify msgs in the queue?

[James Strachan <ja...@gmail.com>]

On 4/21/07, Lucas Blue <lu...@yahoo.com> wrote:
>
> Hi.  Suppose I want to modify a Message, once it is already in the queue,
> without removing it.  (Perhaps I want to change an int property that was set
> on it initially, or perhaps I want to modify the msg itself.)   Is this
> possible?  Is there any 'update message' support in ActiveMQ?  If not,
> perhaps I could hit the underlying jdbc-based persistence and perform
> updates on the appropriate table(s)?
>
> What I'm trying to do is gradually increase the priority of messages that
> are sitting in the queue: the longer they've been waiting, the higher the
> priority.  This is a basic 'aging' algorithm.
>
> I know I can browse all elements using a QueueBrowser, but I see no way to
> update those elements. Any ideas?

http://cwiki.apache.org/ACTIVEMQ/can-i-modify-messages-on-a-queue.html

-- 
James
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