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From Gary Tully <gary.tu...@gmail.com>
Subject Re: Default JMX Connectors Failover for JDBC Master Slave
Date Wed, 05 Sep 2012 11:00:48 GMT
There is no easy solution for this at the moment.

Since https://issues.apache.org/jira/browse/AMQ-2306 both the master
and slave expose them selves over JMX so both urls will be valid.
The difference is that only one will report isSlave==false

There is a jmx facade used by the web console that could be useful if
your client has java code, but it needs some additional smarts to be
aware of the isSlave attribute on a broker.

Currently it is happy if it finds a broker MBean.

Have a peek at:
org.apache.activemq.web.RemoteJMXBrokerFacade#createConnection in [1]

Seems like that facade needs to be able to iterate through the list of
urls or restrict access to just the master. I think it would make a
sensible enhancement.

[1] http://svn.apache.org/viewvc/activemq/trunk/activemq-web/src/main/java/org/apache/activemq/web/RemoteJMXBrokerFacade.java?view=markup

On 5 September 2012 06:18, Gaurav Sharma <gaurav.cs.sharma@gmail.com> wrote:
> For the JDBC Master Slave config, just like there exists the Failover
> Transport for the broker url, what is the best way to specify the JMX
> hosts in a properties file:
> jmxUrl=service:jmx:rmi:///jndi/rmi://<host1>:1616/jmxrmi, \
>            service:jmx:rmi:///jndi/rmi://<host2>:1616/jmxrmi, \
>            service:jmx:rmi:///jndi/rmi://<host3>:1616/jmxrmi
>
> so that I don't have to worry about managing 3 MBeanServerConnection's
> in my code and then trying to figure which one is the master or which
> one is alive, re-election, etc? The alternative of managing the three
> references and error-handling, is just messier.
>
> Thanks in advance for the help.
>
> -gaurav



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