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Posted to users@activemq.apache.org by chris24 <il...@gmail.com> on 2006/05/10 18:45:14 UTC
Getting a list of active topics from a JMS client
Hello,
I have a Java client connecting directly to the broker and am wondering
how I can get a list of topics currently on the broker? I assume the
solution will involve jndi (would this get dynamic topics?). Thanks,
Chris
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Re: Getting a list of active topics from a JMS client
Posted by chris24 <il...@gmail.com>.
I will look into running an embedded broker. Hopefully, stakeholders don't
take issue with that. I appreciate your help.
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Re: Getting a list of active topics from a JMS client
Posted by James Strachan <ja...@gmail.com>.
On 5/10/06, chris24 <il...@gmail.com> wrote:
>
> If I try to copy those examples in my Java code, I get address already in use
> errors. I apologize if I am missing something here. Should I point embedded
> broker code the running mq instance (i.e. tcp://XXXXX)?
So try using a different port.
Note that those examples create a new broker - so stop the other
broker thats running (the one I think you were starting via JNDI)
> Environment:
> I currently start the mq broker on it's own using activemq, then I run the
> code I posted in the previous post to connect and publish and subscribe. I
> need to be able to present a list of topics on the client side so the user
> can select what they want to subscribe to.
I'd run an embedded broker for now - its easier. Another option is to
connect remotely to the remote broker using a JMX connector. So you'd
use the JMX API to query the queues on a possibly remote broker
--
James
-------
http://radio.weblogs.com/0112098/
Re: Getting a list of active topics from a JMS client
Posted by chris24 <il...@gmail.com>.
If I try to copy those examples in my Java code, I get address already in use
errors. I apologize if I am missing something here. Should I point embedded
broker code the running mq instance (i.e. tcp://XXXXX)?
Environment:
I currently start the mq broker on it's own using activemq, then I run the
code I posted in the previous post to connect and publish and subscribe. I
need to be able to present a list of topics on the client side so the user
can select what they want to subscribe to.
--
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Re: Getting a list of active topics from a JMS client
Posted by James Strachan <ja...@gmail.com>.
On 5/10/06, chris24 <il...@gmail.com> wrote:
>
> How would I get access to a broker object or a region object in my client
> code? I currently connect to the standalone broker like this (using the
> default jndi properties with some new topics):
> // Obtain a JNDI connection
> mJndi = new InitialContext();
>
> // Look up a JMS connection factory
> TopicConnectionFactory conFactory =
> (TopicConnectionFactory)mJndi.lookup("TopicConnectionFactory");
>
> // Create a JMS connection
> TopicConnection connection =
> conFactory.createTopicConnection();
See the examples here using Java or Spring...
http://activemq.org/How+do+I+embed+a+Broker+inside+a+Connection
--
James
-------
http://radio.weblogs.com/0112098/
Re: Getting a list of active topics from a JMS client
Posted by chris24 <il...@gmail.com>.
How would I get access to a broker object or a region object in my client
code? I currently connect to the standalone broker like this (using the
default jndi properties with some new topics):
// Obtain a JNDI connection
mJndi = new InitialContext();
// Look up a JMS connection factory
TopicConnectionFactory conFactory =
(TopicConnectionFactory)mJndi.lookup("TopicConnectionFactory");
// Create a JMS connection
TopicConnection connection =
conFactory.createTopicConnection();
Thanks
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Re: Getting a list of active topics from a JMS client
Posted by James Strachan <ja...@gmail.com>.
On 5/10/06, chris24 <il...@gmail.com> wrote:
>
> Thanks.Can you get access to the list programmatically? The broker runs
> standalone and the Java client connects to it using JNDI. Is there a way to
> access the broker in code without embedding it in the code?
Some details of how to do it programmatically are here
http://goopen.org/confluence/display/ACTIVEMQ/How+can+I+see+what+destinations+are+used
--
James
-------
http://radio.weblogs.com/0112098/
Re: Getting a list of active topics from a JMS client
Posted by chris24 <il...@gmail.com>.
Thanks.Can you get access to the list programmatically? The broker runs
standalone and the Java client connects to it using JNDI. Is there a way to
access the broker in code without embedding it in the code?
--
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Re: Getting a list of active topics from a JMS client
Posted by James Strachan <ja...@gmail.com>.
On 5/10/06, chris24 <il...@gmail.com> wrote:
>
> Hello,
>
> I have a Java client connecting directly to the broker and am wondering
> how I can get a list of topics currently on the broker? I assume the
> solution will involve jndi (would this get dynamic topics?). Thanks,
The easiest way is to use JMX
http://activemq.org/JMX
though you can also get all of the active destinations from the broker
http://activemq.codehaus.org/maven/apidocs/org/apache/activemq/broker/Broker.html#getDestinations()
http://activemq.codehaus.org/maven/apidocs/org/apache/activemq/broker/region/Region.html#getDestinationMap()
--
James
-------
http://radio.weblogs.com/0112098/