On 8/18/06, peter anderson <[EMAIL PROTECTED]> wrote:
James Strachan <[EMAIL PROTECTED]> writes:
>
>
> Does the instantiation of the consumer servlet create the consumer?
> Once a consumer is created messages are dispatched asynchronously to
> it; so if you create a consumer then immediately call receiveNoWait()
> then its typically gonna return null.
>
> > Even if I leave a number of minutes between these events the messages
> > are still not being found. However running them in a debugger does work
> > which suggest receiveNoWait() is failing.
>
> Maybe its the debugger adds enough time between the createConsumer()
> call and the receiveNoWait()
>
> > p.s. are there any admin tools I could use to look at messages
> > in the queue ?
>
> Yes...
> http://activemq.org/site/how-can-i-monitor-activemq.html
James
Yes it does. I put in a 1 second delay and it now works fine.
FWIW receive(1000) is better than a sleep as receive(timeout) will
return as soon as a message arrives.
At the moment I am running ActiveMQ from within Tomcat is this the
best thing to do ?
Sure
If not how would I access ActiveMQ from my servlets ?
BTW you might find the activemq-web-demo a useful example of working
with ActiveMQ from a web application and HTTP or Ajax.
p.s. in the application I would have 100s of destinations - would this
create a perfomance problem ?
No. Try to reuse the same producer. For consumers you should try
create them on startup and not create one consumer for each servlet
request if you can help it - or create a consumer for the duration of
a Http Session
--
James
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http://radio.weblogs.com/0112098/
