Thank you!
Server side selector is really different from client side selector.
Especially the exchanges can only route message to queue but not to the
client. And it will violate the spirit of MQ if we want to route message to
a specific client.

On Wed, Feb 18, 2009 at 9:57 PM, Jonathan Robie (via Nabble) <
[email protected]<ml-user%[email protected]>
> wrote:

> Someone else can comment on our overhead per queue, I have not measured
> that, I think we have good support for lots of queues.
>
> You can read a message without consuming it from the queue, and you can
> use Ttl ("time to live") to make a message expire when it is no longer
> relevant.
>
> The XML Exchange supports server side selectors. Currently, I *think* it
> requires the content to be XML. I told someone on Monday that I will
> test whether this is true and make it possible to route based on XQuery
> for messages that do not have XML in the message body.
>
> But use one queue per client first, the overhead is small, and it will
> be less complex.
>
> Hope this helps!
>
> Jonathan
>
> chenta wrote:
> > How do I send a message to a specific client or a group of client when
> all of
> > the client subscribe to the same queue?
> > I encounter this problem because  I do not want to create a queue for
> each
> > client. I think it will be a huge overhead for broker when I have more
> than
> > 15K clients. Am I correct?
> >
> > Because I am using C++ client so there is no JMS selector support. I
> don't
> > think it will be implemented by add an exchange plug-in. Where should I
> > start if I want to implement this feature?
> >
> > B.R.
> > Chenta
> >
>
>
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