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Date: Thu, 16 Jun 2011 11:38:31 -0600
Message-ID: <BANLkTiksKtLO=TyXfMvN6VDhHaA7975b9w@mail.gmail.com>
Subject: Re: Detect empty Queue programmatically
From: Jason Whaley <jasonwhaley@gmail.com>
To: users@activemq.apache.org
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Out of curiosity, what is the purpose of detecting an empty queue and firing
off this query?  What is the end goal you are attempting to accomplish?
 Perhaps there's a better solution than trying to determine if the queue is
empty.

On Wed, Jun 15, 2011 at 11:56 AM, Yuvaraj Vanarase <
yuvaraj.vanarase@synechron.com> wrote:

> Thanks Jason,
>
> I am trying to know if there is way to create and register some listener to
> Broker so that Broker will callback some method on listener when queue
> becomes empty on broker. In this way, client doesn't have to poll queue to
> know if all messages are consumed.
> Well, I do also think it may not happening that Broker itself knows when
> queue becomes empty, then above requirement is nonsense. In this case is the
> polling/checking queue messages  remaining is the solution?
>
> Regards,
> Yuvaraj
>
> Yuvaraj Vanarase,
> Lead Technology - Software
> Phone: +91.20.40262000 Ext 2305|Mobile: +91.9850818870 |
> http://www.synechron.com
> SYNECHRON -
> - Top 10 Best IT Employers for 4 consecutive years (link).
> - Celebrating 10 Years!
>
>
> -----Original Message-----
> From: Jason Whaley [mailto:jasonwhaley@gmail.com]
> Sent: Wednesday, June 15, 2011 8:07 PM
> To: users@activemq.apache.org
> Subject: Re: Detect empty Queue programmatically
>
> I'm not sure if by saying "I do not want to poll the queue to see remaining
> messages" means you are ruling out polling JMX also, but you could very
> well
> monitor a Queue's QueueSize attribute via JMX and take action when it is 0.
>
>
> Here's a link to at least setting up JMX on the broker with some other
> details http://activemq.apache.org/jmx.html .
>
> On Tue, Jun 14, 2011 at 10:54 PM, Yuvaraj Vanarase <
> yuvaraj.vanarase@synechron.com> wrote:
>
> > Hi,
> >
> > I would like to fire some sql query when all messages are processed from
> > Queue ie. Queue becomes empty. I do not want to poll the queue to see
> > remaining messages. Is there any way by which activemq will deliever an
> > event to some listener? Like we have advisory message listener.
> >
> > Regards,
> > Yuvaraj
> >
> > Yuvaraj Vanarase,
> > Lead Technology - Software
> > Phone: +91.20.40262000 Ext 2305|Mobile: +91.9850818870 |
> > http://www.synechron.com
> > SYNECHRON -
> > - Top 10 Best IT Employers for 4 consecutive years (link<
> > http://www.synechron.com/news/news_best_employer_sep2010.htm>).
> > - Celebrating 10 Years!
> >
> >
>

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