From: aidy <aidy.lewis@...>
Date: 2010-08-04T20:10:04+09:00
Subject: jmx4r metaprogramming

Hi,

I am attempting to use the jmx4r library to set an MBean attribute.

From here: http://www.infoq.com/news/2007/06/jmx4r-jruby

It looks like jmx4r uses metaprogramming techniques which disposes
with JMX method calls.

However, I am receiving a

`method_missing': undefined method `active ='

exception, when I attempt to set the attribute.


require 'rubygems'
require 'jmx4r'

include JMX
MBean.establish_connection :host => "xxxxx", :port => 8999
standby_mbean = MBean.find_by_name
"xxx.jmx.monitors:name=hydra.planb.cps,type=JmsQueueStatsMBeanFactory"
standby_mbean.active # == true
begin
  standby_mbean.active = false
ensure
  MBean.remove_connection
end

Do I need to explicitly invoke an operation?

Thanks

Aidy