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From Christian Posta <>
Subject Re: Reorder of messages
Date Wed, 13 Feb 2013 14:37:15 GMT
Correct, KahaDB only supports the three levels. JDBC is definitely "slower"
but that is of course relative. Try it out and see if that meets your
Instead of querying ActiveMQ's store, might just want to use Kahadb without
priority and dump messages from the broker to the DB and query that way
(using a Camel route?)

On Wed, Feb 13, 2013 at 7:20 AM, <> wrote:

> Message Priority might be a workable solution, except for when using
> KahaDB I
> only have three levels I can set.  That doesn't give me enough values.
> gives me all the JMS standard priorities, so that is better.
> But isn't using jdbc instead of kaha or leveldb many times slower in
> general?
> One question about priority messages:
> When a message is consumed by priority, isn't that really the same as using
> a selector?
> ActiveMQ must be looking at everything in the queue, just like a selector
> would. Correct?
> So then the same concerns about performance and tweaking the page size are
> still there.
> It seems it all comes down to the fact that there is no way to "get" a
> specific message from a queue/topic without looking at all the messages, as
> it is not a relational database, and isn't supposed to be.
> Although, if I'm using a jbdc relational database as my store, that type of
> "get" should be possible?  Not in a standard ActiveMQ / JMS way, but the
> data of what is in a queue or topic is stored in tables that I can query.
> Correct?
> Making sure I'm not missing something before giving up.
> Thanks for any responses
> --
> View this message in context:
> Sent from the ActiveMQ - User mailing list archive at

*Christian Posta*
twitter: @christianposta

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