Thanks for the reply. You follow me 100% :) I only want to emphasize
that machine B doesn't have ServiceMix installed, in case it is not
clear.
Until now I didn't know you could configure the topics to be durable
in ServiceMix, but I have just seen the new JMS endpoints section on
the web and it seems it's not very complicated. I'll try it and see if
it resolves my problem.
The strange thing is that using JConsole on machine A, I can see the
messages are being persisted, but on machine B I just get to see that
the topic exists, but it seems to be empty. The Topic says it has 2
consumers, so I understand both A and B should see the messages. Maybe
I'm missing something out to make B subscribe to the Topic. How can I
make sure it is subscribed?
Thanks again.
Sebastian Gomez.
On 3/26/08, Bruce Snyder <[EMAIL PROTECTED]> wrote:
> On Wed, Mar 26, 2008 at 1:45 PM, Sebastian Gomez <[EMAIL PROTECTED]> wrote:
> > Hello.
> >
> > I've found a new obstacle in my project using ServiceMix: I am trying
> > to read the messages sent to an ActiveMQ Topic defined in ServiceMix
> > from a remote machine. I've tried looking for the messages using the
> > ActiveMQ WebBrowser and the JConsole, but it seems the topics don't
> > receive any messages (although the topic does appear, empty). In my
> > machine executing ServiceMix I am able to see the messages perfectly
> > stored in the queue, so the problem comes when connecting remotely,
> > not when persisting. I've tried connecting to the ServiceMix queue
> > before, during, and after message persistence in case I was not
> > receiving the messages because of subscribing too late to the topic,
> > but whatever the scenario my queue in the remote machine is blank.
> >
> > I've tried various configuration in the activemq.xml file of the
> > remote machine, but without success. Maybe the problem is there, I am
> > quite new to ActiveMQ, I have read a few guides already, but maybe my
> > knowledge is insufficient yet.
> >
> > I've run out of ideas, so I'm willing to try out anything that you
> > think could work.
>
> OK, I'm not sure I follow you 100%, so let ask some questions.
>
> So you are sending messages to an ActiveMQ topic inside of ServiceMix
> on machine A. Then you try to read the messages from the same ActiveMQ
> topic inside of ServiceMix from machine B and there are no messages.
> Correct?
>
> First off, topics are not going to hold messages if there is no active
> subscriber unless you configure the subscription to be durable. If the
> subscription is durable, then the broker will hold all messages for a
> given consumer while it is offline. That way when it comes back online
> it will receive all the messages to the topic while it was gone. Are
> you using durable subscriptions?
>
> The easiest way to see what's happening is via Jconsole on machine A.
> Jconsole will display the consumerCount, the enqueueCount, the
> dequeueCount, etc. This will tell you if any messages have flowed
> through the topic.
>
> Bruce
> --
> perl -e 'print unpack("u30","D0G)[EMAIL
> PROTECTED]&5R\"F)R=6-E+G-N>61E<D\!G;6%I;\"YC;VT*"
> );'
>
> Apache ActiveMQ - http://activemq.org/
> Apache Camel - http://activemq.org/camel/
> Apache ServiceMix - http://servicemix.org/
> Apache Geronimo - http://geronimo.apache.org/
>
> Blog: http://bruceblog.org/
>
